[MIRROR] TGUI list conversions + bug fixes [MDB IGNORE] (#10355)

* TGUI list conversions + bug fixes

* Fixing conflicts

* Maintaining a few modular files while we're at it...

Co-authored-by: Jeremiah <42397676+jlsnow301@users.noreply.github.com>
Co-authored-by: GoldenAlpharex <jerego1234@hotmail.com>

code/__HELPERS/areas.dm

@@ -17,7 +17,7 @@ GLOBAL_LIST_INIT(typecache_powerfailure_safe_areas, typecacheof(/area/engineerin
 	. = list()
 	var/list/checked_turfs = list()
 	var/list/found_turfs = list(origin)
-	while(found_turfs.len)
+	while(length(found_turfs))
 		var/turf/sourceT = found_turfs[1]
 		found_turfs.Cut(1, 2)
 		var/dir_flags = checked_turfs[sourceT]
@@ -54,23 +54,23 @@ GLOBAL_LIST_INIT(typecache_powerfailure_safe_areas, typecacheof(/area/engineerin
 	if(!turfs)
 		to_chat(creator, span_warning("The new area must be completely airtight and not a part of a shuttle."))
 		return
-	if(turfs.len > BP_MAX_ROOM_SIZE)
-		to_chat(creator, span_warning("The room you're in is too big. It is [turfs.len >= BP_MAX_ROOM_SIZE *2 ? "more than 100" : ((turfs.len / BP_MAX_ROOM_SIZE)-1)*100]% larger than allowed."))
+	if(length(turfs) > BP_MAX_ROOM_SIZE)
+		to_chat(creator, span_warning("The room you're in is too big. It is [length(turfs) >= BP_MAX_ROOM_SIZE *2 ? "more than 100" : ((length(turfs) / BP_MAX_ROOM_SIZE)-1)*100]% larger than allowed."))
 		return
 	var/list/areas = list("New Area" = /area)
-	for(var/i in 1 to turfs.len)
+	for(var/i in 1 to length(turfs))
 		var/area/place = get_area(turfs[i])
 		if(blacklisted_areas[place.type])
 			continue
 		if(!place.requires_power || (place.area_flags & NOTELEPORT) || (place.area_flags & HIDDEN_AREA))
 			continue // No expanding powerless rooms etc
 		areas[place.name] = place
-	var/area_choice = input(creator, "Choose an area to expand or make a new area.", "Area Expansion") as null|anything in areas
-	area_choice = areas[area_choice]
-
-	if(!area_choice)
+	var/area_choice = tgui_input_list(creator, "Choose an area to expand or make a new area", "Area Expansion", areas)
+	if(isnull(area_choice))
 		to_chat(creator, span_warning("No choice selected. The area remains undefined."))
 		return
+	area_choice = areas[area_choice]
+
 	var/area/newA
 	var/area/oldA = get_area(get_turf(creator))
 	if(!isarea(area_choice))
@@ -83,7 +83,7 @@ GLOBAL_LIST_INIT(typecache_powerfailure_safe_areas, typecacheof(/area/engineerin
 	else
 		newA = area_choice
 
-	for(var/i in 1 to turfs.len)
+	for(var/i in 1 to length(turfs))
 		var/turf/thing = turfs[i]
 		var/area/old_area = thing.loc
 		newA.contents += thing

code/__HELPERS/hearted.dm

@@ -42,11 +42,11 @@
 	var/heart_nominee
 	switch(attempt)
 		if(1)
-			heart_nominee = input(src, "What was their name? Just a first or last name may be enough. (Leave blank to cancel)", "<3?")
+			heart_nominee = tgui_input_text(src, "What was their name? Just a first or last name may be enough.", "<3?")
 		if(2)
-			heart_nominee = input(src, "Try again, what was their name? Just a first or last name may be enough. (Leave blank to cancel)", "<3?")
+			heart_nominee = tgui_input_text(src, "Try again, what was their name? Just a first or last name may be enough.", "<3?")
 		if(3)
-			heart_nominee = input(src, "One more try, what was their name? Just a first or last name may be enough. (Leave blank to cancel)", "<3?")
+			heart_nominee = tgui_input_text(src, "One more try, what was their name? Just a first or last name may be enough.", "<3?")
 
 	if(isnull(heart_nominee) || heart_nominee == "")
 		return

code/__HELPERS/memory_helpers.dm

@@ -97,6 +97,10 @@
 		choice_list[memory_iter.name] = memory_iter
 
 	var/choice = tgui_input_list(usr, "Select a memory to [verbage]", "Memory Selection?", choice_list)
+	if(isnull(choice))
+		return FALSE
+	if(isnull(choice_list[choice]))
+		return FALSE
 	var/datum/memory/memory_choice = choice_list[choice]
 
 	return memory_choice

code/_onclick/hud/ai.dm

@@ -34,6 +34,8 @@
 		return
 	var/mob/living/silicon/ai/AI = usr
 	var/target_name = tgui_input_list(AI, "Select a target", "Tracking", AI.trackable_mobs())
+	if(isnull(target_name))
+		return
 	AI.ai_camera_track(target_name)
 
 /atom/movable/screen/ai/camera_light

code/datums/components/cult_ritual_item.dm

@@ -259,7 +259,9 @@
 		return FALSE
 
 	entered_rune_name = tgui_input_list(cultist, "Choose a rite to scribe", "Sigils of Power", GLOB.rune_types)
-	if(!entered_rune_name || !can_scribe_rune(tool, cultist))
+	if(isnull(entered_rune_name))
+		return FALSE
+	if(!can_scribe_rune(tool, cultist))
 		return FALSE
 
 	rune_to_scribe = GLOB.rune_types[entered_rune_name]
@@ -447,7 +449,7 @@
 		to_chat(cultist, span_warning("This veil is not weak enough here - it can only be scribed in [english_list(summon_objective.summon_spots)]!"))
 		return FALSE
 
-	if(fail_if_last_site && summon_objective.summon_spots.len <= 1)
+	if(fail_if_last_site && length(summon_objective.summon_spots) <= 1)
 		to_chat(cultist, span_warning("This rune cannot be scribed here - the ritual site must be reserved for the final summoning!"))
 		return FALSE
 

code/datums/components/material_container.dm

@@ -154,7 +154,7 @@
 	if(istype(I, /obj/item/stack) && precise_insertion)
 		var/atom/current_parent = parent
 		var/obj/item/stack/S = I
-		requested_amount = input(user, "How much do you want to insert?", "Inserting [S.singular_name]s") as num|null
+		requested_amount = round(tgui_input_number(user, "How much do you want to insert?", "Inserting [S.singular_name]s"))
 		if(isnull(requested_amount) || (requested_amount <= 0))
 			return
 		if(QDELETED(I) || QDELETED(user) || QDELETED(src) || parent != current_parent || user.physical_can_use_topic(current_parent) < UI_INTERACTIVE || user.get_active_held_item() != active_held)

code/datums/diseases/advance/advance.dm

@@ -451,7 +451,7 @@
 	symptoms += SSdisease.list_symptoms.Copy()
 	do
 		if(user)
-			var/symptom = input(user, "Choose a symptom to add ([i] remaining)", "Choose a Symptom") in sort_list(symptoms, /proc/cmp_typepaths_asc)
+			var/symptom = tgui_input_list(user, "Choose a symptom to add ([i] remaining)", "Choose a Symptom", sort_list(symptoms, /proc/cmp_typepaths_asc))
 			if(isnull(symptom))
 				return
 			else if(istext(symptom))
@@ -465,7 +465,7 @@
 
 	if(D.symptoms.len > 0)
 
-		var/new_name = stripped_input(user, "Name your new disease.", "New Name")
+		var/new_name = tgui_input_text(user, "Name your new disease", "New Name", max_length = MAX_NAME_LEN)
 		if(!new_name)
 			return
 		D.Refresh()
@@ -474,11 +474,10 @@
 
 		var/list/targets = list("Random")
 		targets += sort_names(GLOB.human_list)
-		var/target = input(user, "Pick a viable human target for the disease.", "Disease Target") as null|anything in targets
-
-		var/mob/living/carbon/human/H
-		if(!target)
+		var/target = tgui_input_list(user, "Viable human target", "Disease Target", targets)
+		if(isnull(target))
 			return
+		var/mob/living/carbon/human/H
 		if(target == "Random")
 			for(var/human in shuffle(GLOB.human_list))
 				H = human

code/datums/elements/surgery_initiator.dm

@@ -62,11 +62,13 @@
 					available_surgeries[surgeryloop_two.name] = surgeryloop_two
 					break
 
-		if(!available_surgeries.len)
+		if(!length(available_surgeries))
 			return
 
 		var/pick_your_surgery = tgui_input_list(user, "Which procedure?", "Surgery", sort_list(available_surgeries))
-		if(pick_your_surgery && user?.Adjacent(livingtarget) && (source in user))
+		if(isnull(pick_your_surgery))
+			return
+		if(user?.Adjacent(livingtarget) && (source in user))
 			var/datum/surgery/surgeryinstance_notonmob = available_surgeries[pick_your_surgery]
 
 			for(var/i_three in livingtarget.surgeries)

code/datums/mutations/actions.dm

@@ -61,9 +61,9 @@
 		if(!length(possible))
 			to_chat(user,span_warning("Despite your best efforts, there are no scents to be found on [sniffed]..."))
 			return
-		tracking_target = input(user, "Choose a scent to remember.", "Scent Tracking") as null|anything in sort_names(possible)
-		if(!tracking_target)
-			if(!old_target)
+		tracking_target = tgui_input_list(user, "Scent to remember", "Scent Tracking", sort_names(possible))
+		if(isnull(tracking_target))
+			if(isnull(old_target))
 				to_chat(user,span_warning("You decide against remembering any scents. Instead, you notice your own nose in your peripheral vision. This goes on to remind you of that one time you started breathing manually and couldn't stop. What an awful day that was."))
 				return
 			tracking_target = old_target
@@ -242,7 +242,7 @@
 		if(BP.body_part != HEAD && BP.body_part != CHEST)
 			if(BP.dismemberable)
 				parts += BP
-	if(!parts.len)
+	if(!length(parts))
 		to_chat(usr, span_notice("You can't shed any more limbs!"))
 		return
 

code/datums/station_alert.dm

@@ -93,7 +93,7 @@
 				chosen_camera = named_cameras[1]
 			else
 				chosen_camera = tgui_input_list(ai, "Choose a camera to jump to", "Camera Selection", named_cameras)
-				if(!chosen_camera)
+				if(isnull(chosen_camera))
 					return
 			var/obj/machinery/camera/selected_camera = named_cameras[chosen_camera]
 			if(!selected_camera.can_use())

code/game/machinery/_machinery.dm

@@ -627,11 +627,13 @@
 	if(!Adjacent(user) || !can_buckle || !has_buckled_mobs()) //so that borgs (but not AIs, sadly (perhaps in a future PR?)) can unbuckle people from machines
 		return _try_interact(user)
 
-	if(buckled_mobs.len <= 1)
+	if(length(buckled_mobs) <= 1)
 		if(user_unbuckle_mob(buckled_mobs[1],user))
 			return TRUE
 
-	var/unbuckled = input(user, "Who do you wish to unbuckle?","Unbuckle Who?") as null|mob in sort_names(buckled_mobs)
+	var/unbuckled = tgui_input_list(user, "Who do you wish to unbuckle?", "Unbuckle", sort_names(buckled_mobs))
+	if(isnull(unbuckled))
+		return FALSE
 	if(user_unbuckle_mob(unbuckled,user))
 		return TRUE
 

code/game/machinery/autolathe.dm

@@ -207,7 +207,7 @@
 							list_to_show += i
 
 					used_material = tgui_input_list(usr, "Choose [used_material]", "Custom Material", sort_list(list_to_show, /proc/cmp_typepaths_asc))
-					if(!used_material)
+					if(isnull(used_material))
 						return //Didn't pick any material, so you can't build shit either.
 					custom_materials[used_material] += amount_needed
 
@@ -264,7 +264,7 @@
 				else
 					LAZYADD(not_imported, blueprint.name)
 			if(not_imported)
-				to_chat(user, span_warning("The following design[not_imported.len > 1 ? "s" : ""] couldn't be imported: [english_list(not_imported)]"))
+				to_chat(user, span_warning("The following design[length(not_imported) > 1 ? "s" : ""] couldn't be imported: [english_list(not_imported)]"))
 		busy = FALSE
 		return TRUE
 
@@ -348,7 +348,7 @@
 		. += span_notice("The status display reads: Storing up to <b>[materials.max_amount]</b> material units.<br>Material consumption at <b>[creation_efficiency*100]%</b>.")
 
 /obj/machinery/autolathe/proc/can_build(datum/design/D, amount = 1)
-	if(D.make_reagents.len)
+	if(length(D.make_reagents))
 		return FALSE
 
 	var/coeff = (ispath(D.build_path, /obj/item/stack) ? 1 : creation_efficiency)

code/game/machinery/camera/camera.dm

@@ -231,10 +231,12 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/camera/xray, 0)
 		droppable_parts += assembly.emp_module
 	if(assembly.proxy_module)
 		droppable_parts += assembly.proxy_module
-	if(!droppable_parts.len)
+	if(!length(droppable_parts))
 		return
-	var/obj/item/choice = input(user, "Select a part to remove:", src) as null|obj in sort_names(droppable_parts)
-	if(!choice || !user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
+	var/obj/item/choice = tgui_input_list(user, "Select a part to remove", "Part Removal", sort_names(droppable_parts))
+	if(isnull(choice))
+		return
+	if(!user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 		return
 	to_chat(user, span_notice("You remove [choice] from [src]."))
 	if(choice == assembly.xray_module)

code/game/machinery/camera/camera_assembly.dm

@@ -201,10 +201,12 @@
 		droppable_parts += emp_module
 	if(proxy_module)
 		droppable_parts += proxy_module
-	if(!droppable_parts.len)
+	if(!length(droppable_parts))
 		return
-	var/obj/item/choice = input(user, "Select a part to remove:", src) as null|obj in sort_names(droppable_parts)
-	if(!choice || !user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
+	var/obj/item/choice = tgui_input_list(user, "Select a part to remove", "Part Removal", sort_names(droppable_parts))
+	if(isnull(choice))
+		return
+	if(!user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 		return
 	to_chat(user, span_notice("You remove [choice] from [src]."))
 	drop_upgrade(choice)

code/game/machinery/camera/tracking.dm

@@ -9,7 +9,7 @@
 
 	for (var/obj/machinery/camera/C in L)
 		var/list/tempnetwork = C.network&src.network
-		if (tempnetwork.len)
+		if (length(tempnetwork))
 			T[text("[][]", C.c_tag, (C.can_use() ? null : " (Deactivated)"))] = C
 
 	return T
@@ -17,6 +17,10 @@
 /mob/living/silicon/ai/proc/show_camera_list()
 	var/list/cameras = get_camera_list()
 	var/camera = tgui_input_list(src, "Choose which camera you want to view", "Cameras", cameras)
+	if(isnull(camera))
+		return
+	if(isnull(cameras[camera]))
+		return
 	switchCamera(cameras[camera])
 
 /datum/trackable
@@ -145,7 +149,7 @@
 	var/obj/machinery/camera/a
 	var/obj/machinery/camera/b
 
-	for (var/i = L.len, i > 0, i--)
+	for (var/i = length(L), i > 0, i--)
 		for (var/j = 1 to i - 1)
 			a = L[j]
 			b = L[j + 1]

code/game/machinery/computer/arena.dm

@@ -159,9 +159,9 @@
 		var/list/keys = list()
 		for(var/mob/M in GLOB.player_list)
 			keys += M.client
-		var/client/selection = input("Please, select a player!", "Team member", null, null) as null|anything in sort_key(keys)
+		var/client/selection = tgui_input_list(user, "Select a player", "Team member", sort_key(keys))
 		//Could be freeform if you want to add disconnected i guess
-		if(!selection)
+		if(isnull(selection))
 			return
 		key = selection.ckey
 	if(!team_keys[team])

code/game/machinery/computer/atmos_control.dm

@@ -424,7 +424,9 @@ GLOBAL_LIST_EMPTY(atmos_air_controllers)
 		IO |= text[1]
 	if(!IO.len)
 		to_chat(user, span_alert("No machinery detected."))
-	var/S = input("Select the device set: ", "Selection", IO[1]) as anything in sort_list(IO)
+	var/S = tgui_input_list(user, "Select the device set", "Reconnect", sort_list(IO))
+	if(isnull(S))
+		return
 	if(src)
 		src.input_tag = "[S]_in"
 		src.output_tag = "[S]_out"

code/game/machinery/computer/camera_advanced.dm

@@ -137,19 +137,19 @@
 		var/camera_location
 		var/turf/myturf = get_turf(src)
 		if(eyeobj.use_static != FALSE)
-			if((!z_lock.len || (myturf.z in z_lock)) && GLOB.cameranet.checkTurfVis(myturf))
+			if((!length(z_lock) || (myturf.z in z_lock)) && GLOB.cameranet.checkTurfVis(myturf))
 				camera_location = myturf
 			else
 				for(var/obj/machinery/camera/C in GLOB.cameranet.cameras)
-					if(!C.can_use() || z_lock.len && !(C.z in z_lock))
+					if(!C.can_use() || length(z_lock) && !(C.z in z_lock))
 						continue
 					var/list/network_overlap = networks & C.network
-					if(network_overlap.len)
+					if(length(network_overlap))
 						camera_location = get_turf(C)
 						break
 		else
 			camera_location = myturf
-			if(z_lock.len && !(myturf.z in z_lock))
+			if(length(z_lock) && !(myturf.z in z_lock))
 				camera_location = locate(round(world.maxx/2), round(world.maxy/2), z_lock[1])
 
 		if(camera_location)
@@ -274,7 +274,7 @@
 	var/list/L = list()
 
 	for (var/obj/machinery/camera/cam in GLOB.cameranet.cameras)
-		if(origin.z_lock.len && !(cam.z in origin.z_lock))
+		if(length(origin.z_lock) && !(cam.z in origin.z_lock))
 			continue
 		L.Add(cam)
 
@@ -284,13 +284,17 @@
 
 	for (var/obj/machinery/camera/netcam in L)
 		var/list/tempnetwork = netcam.network & origin.networks
-		if (tempnetwork.len)
+		if (length(tempnetwork))
 			if(!netcam.c_tag)
 				continue
 			T["[netcam.c_tag][netcam.can_use() ? null : " (Deactivated)"]"] = netcam
 
 	playsound(origin, 'sound/machines/terminal_prompt.ogg', 25, FALSE)
 	var/camera = tgui_input_list(usr, "Camera to view", "Cameras", T)
+	if(isnull(camera))
+		return
+	if(isnull(T[camera]))
+		return
 	var/obj/machinery/camera/final = T[camera]
 	playsound(src, "terminal_type", 25, FALSE)
 	if(final)

code/game/machinery/computer/communications.dm

@@ -697,7 +697,7 @@ GLOBAL_VAR_INIT(cops_arrived, FALSE)
 	if(!SScommunications.can_announce(user, is_ai))
 		to_chat(user, span_alert("Intercomms recharging. Please stand by."))
 		return
-	var/input = stripped_input(user, "Please choose a message to announce to the station crew.", "What?")
+	var/input = tgui_input_text(user, "Message to announce to the station crew", "Announcement")
 	if(!input || !user.canUseTopic(src, !issilicon(usr)))
 		return
 	if(!(user.can_speak())) //No more cheating, mime/random mute guy!

code/game/machinery/computer/prisoner/management.dm

@@ -98,10 +98,10 @@
 					if("reset")
 						contained_id.points = 0
 					if("setgoal")
-						var/num = round(input(usr, "Choose prisoner's goal:", "Input an Integer", null) as num|null)
-						if(num >= 0)
-							num = min(num,1000) //Cap the quota to the equivilent of 10 minutes.
-							contained_id.goal = num
+						var/num = tgui_input_text(usr, "Enter the prisoner's goal", "Prisoner Management", 1, 1000, 1)
+						if(isnull(num))
+							return
+						contained_id.goal = round(num)
 		else if(href_list["inject1"])
 			var/obj/item/implant/I = locate(href_list["inject1"]) in GLOB.tracked_chem_implants
 			if(I && istype(I))

code/game/machinery/computer/security.dm

@@ -612,19 +612,19 @@ What a mess.*/
 					printing = null
 			if("Print Poster")
 				if(!( printing ))
-					var/wanted_name = stripped_input(usr, "Please enter an alias for the criminal:", "Print Wanted Poster", active1.fields["name"])
+					var/wanted_name = tgui_input_text(usr, "Enter an alias for the criminal", "Print Wanted Poster", active1.fields["name"])
 					if(wanted_name)
 						var/default_description = "A poster declaring [wanted_name] to be a dangerous individual, wanted by Nanotrasen. Report any sightings to security immediately."
 						var/list/crimes = active2.fields["crim"]
-						if(crimes.len)
+						if(length(crimes))
 							default_description += "\n[wanted_name] is wanted for the following crimes:\n"
 							for(var/datum/data/crime/c in active2.fields["crim"])
 								default_description += "\n[c.crimeName]\n"
 								default_description += "[c.crimeDetails]\n"
 
-						var/headerText = stripped_input(usr, "Please enter Poster Heading (Max 7 Chars):", "Print Wanted Poster", "WANTED", 8)
+						var/headerText = tgui_input_text(usr, "Enter a poster heading", "Print Wanted Poster", "WANTED", 7)
 
-						var/info = stripped_multiline_input(usr, "Please input a description for the poster:", "Print Wanted Poster", default_description, null)
+						var/info = tgui_input_text(usr, "Input a description for the poster", "Print Wanted Poster", default_description)
 						if(info)
 							playsound(loc, 'sound/items/poster_being_created.ogg', 100, TRUE)
 							printing = 1
@@ -635,13 +635,13 @@ What a mess.*/
 							printing = 0
 			if("Print Missing")
 				if(!( printing ))
-					var/missing_name = stripped_input(usr, "Please enter an alias for the missing person:", "Print Missing Persons Poster", active1.fields["name"])
+					var/missing_name = tgui_input_text(usr, "Enter an alias for the missing person", "Print Missing Persons Poster", active1.fields["name"])
 					if(missing_name)
 						var/default_description = "A poster declaring [missing_name] to be a missing individual, missed by Nanotrasen. Report any sightings to security immediately."
 
-						var/headerText = stripped_input(usr, "Please enter Poster Heading (Max 7 Chars):", "Print Missing Persons Poster", "MISSING", 8)
+						var/headerText = tgui_input_text(usr, "Enter a poster heading", "Print Missing Persons Poster", "MISSING", 7)
 
-						var/info = stripped_multiline_input(usr, "Please input a description for the poster:", "Print Missing Persons Poster", default_description, null)
+						var/info = tgui_input_text(usr, "Input a description for the poster", "Print Missing Persons Poster", default_description)
 						if(info)
 							playsound(loc, 'sound/items/poster_being_created.ogg', 100, TRUE)
 							printing = 1
@@ -669,7 +669,7 @@ What a mess.*/
 				if(!( istype(active2, /datum/data/record) ))
 					return
 				var/a2 = active2
-				var/t1 = stripped_multiline_input("Add Comment:", "Secure. records", null, null)
+				var/t1 = tgui_input_text(usr, "Add a comment", "Security Records")
 				if(!canUseSecurityRecordsConsole(usr, t1, null, a2))
 					return
 				var/counter = 1
@@ -763,7 +763,7 @@ What a mess.*/
 				switch(href_list["field"])
 					if("name")
 						if(istype(active1, /datum/data/record) || istype(active2, /datum/data/record))
-							var/t1 = stripped_input(usr, "Please input name:", "Secure. records", active1.fields["name"], MAX_MESSAGE_LEN)
+							var/t1 = tgui_input_text(usr, "Input a name", "Security Records", active1.fields["name"])
 							if(!canUseSecurityRecordsConsole(usr, t1, a1))
 								return
 							if(istype(active1, /datum/data/record))
@@ -772,7 +772,7 @@ What a mess.*/
 								active2.fields["name"] = t1
 					if("id")
 						if(istype(active2, /datum/data/record) || istype(active1, /datum/data/record))
-							var/t1 = stripped_input(usr, "Please input id:", "Secure. records", active1.fields["id"], null)
+							var/t1 = tgui_input_text(usr, "Input an id", "Security Records", active1.fields["id"])
 							if(!canUseSecurityRecordsConsole(usr, t1, a1))
 								return
 							if(istype(active1, /datum/data/record))
@@ -781,7 +781,7 @@ What a mess.*/
 								active2.fields["id"] = t1
 					if("fingerprint")
 						if(istype(active1, /datum/data/record))
-							var/t1 = stripped_input(usr, "Please input fingerprint hash:", "Secure. records", active1.fields["fingerprint"], null)
+							var/t1 = tgui_input_text(usr, "Input a fingerprint hash", "Security Records", active1.fields["fingerprint"])
 							if(!canUseSecurityRecordsConsole(usr, t1, a1))
 								return
 							active1.fields["fingerprint"] = t1
@@ -795,7 +795,7 @@ What a mess.*/
 								active1.fields["gender"] = "Male"
 					if("age")
 						if(istype(active1, /datum/data/record))
-							var/t1 = input("Please input age:", "Secure. records", active1.fields["age"], null) as num|null
+							var/t1 = tgui_input_number(usr, "Input age", "Security records", active1.fields["age"], AGE_MAX, AGE_MIN)
 
 							if (!t1)
 								return
@@ -805,7 +805,9 @@ What a mess.*/
 							active1.fields["age"] = t1
 					if("species")
 						if(istype(active1, /datum/data/record))
-							var/t1 = input("Select a species", "Species Selection") as null|anything in get_selectable_species()
+							var/t1 = tgui_input_list(usr, "Select a species", "Species Selection", get_selectable_species())
+							if(isnull(t1))
+								return
 							if(!canUseSecurityRecordsConsole(usr, t1, a1))
 								return
 							active1.fields["species"] = t1
@@ -855,8 +857,8 @@ What a mess.*/
 								print_photo(P.picture.picture_image, active1.fields["name"])
 					if("crim_add")
 						if(istype(active1, /datum/data/record))
-							var/t1 = stripped_input(usr, "Please input crime names:", "Secure. records", "", null)
-							var/t2 = stripped_input(usr, "Please input crime details:", "Secure. records", "", null)
+							var/t1 = tgui_input_text(usr, "Input crime names", "Security Records")
+							var/t2 = tgui_input_text(usr, "Input crime details", "Security Records")
 							if(!canUseSecurityRecordsConsole(usr, t1, null, a2))
 								return
 							var/crime = GLOB.data_core.createCrimeEntry(t1, t2, authenticated, station_time_timestamp())
@@ -871,7 +873,7 @@ What a mess.*/
 					if("add_details")
 						if(istype(active1, /datum/data/record))
 							if(href_list["cdataid"])
-								var/t1 = stripped_input(usr, "Please input crime details:", "Secure. records", "", null)
+								var/t1 = tgui_input_text(usr, "Input crime details", "Security Records")
 								if(!canUseSecurityRecordsConsole(usr, t1, null, a2))
 									return
 								GLOB.data_core.addCrimeDetails(active1.fields["id"], href_list["cdataid"], t1)
@@ -880,17 +882,13 @@ What a mess.*/
 						if(istype(active1, /datum/data/record))
 							var/maxFine = CONFIG_GET(number/maxfine)
 
-							var/t1 = stripped_input(usr, "Please input citation crime:", "Secure. records", "", null)
-							var/fine = FLOOR(input(usr, "Please input citation fine, up to [maxFine]:", "Secure. records", 50) as num|null, 1)
+							var/t1 = tgui_input_text(usr, "Input citation crime", "Security Records")
+							var/fine = round(tgui_input_number(usr, "Input citation fine", "Security Records", 50, maxFine, 1))
 
 							if (isnull(fine))
 								return
 							fine = min(fine, maxFine)
 
-							if(fine < 0)
-								to_chat(usr, span_warning("You're pretty sure that's not how money works."))
-								return
-
 							if(!canUseSecurityRecordsConsole(usr, t1, null, a2))
 								return
 
@@ -918,7 +916,7 @@ What a mess.*/
 								GLOB.data_core.removeCitation(active1.fields["id"], href_list["cdataid"])
 					if("notes")
 						if(istype(active2, /datum/data/record))
-							var/t1 = stripped_input(usr, "Please summarize notes:", "Secure. records", active2.fields["notes"], null)
+							var/t1 = tgui_input_text(usr, "Please summarize notes", "Security Records", active2.fields["notes"])
 							if(!canUseSecurityRecordsConsole(usr, t1, null, a2))
 								return
 							active2.fields["notes"] = t1

code/game/machinery/computer/teleporter.dm

@@ -188,16 +188,20 @@
 	var/list/targets = get_targets()
 
 	if (regime_set == "Teleporter")
-		var/desc = input("Please select a location to lock in.", "Locking Computer") as null|anything in sort_list(targets)
+		var/desc = tgui_input_list(usr, "Select a location to lock in", "Locking Computer", sort_list(targets))
+		if(isnull(desc))
+			return
 		set_teleport_target(targets[desc])
 		var/turf/target_turf = get_turf(targets[desc])
 		log_game("[key_name(user)] has set the teleporter target to [targets[desc]] at [AREACOORD(target_turf)]")
 	else
-		if (targets.len == 0)
+		if (!length(targets))
 			to_chat(user, span_alert("No active connected stations located."))
 			return
 
-		var/desc = input("Please select a station to lock in.", "Locking Computer") as null|anything in sort_list(targets)
+		var/desc = tgui_input_list(usr, "Select a station to lock in", "Locking Computer", sort_list(targets))
+		if(isnull(desc))
+			return
 		var/obj/machinery/teleport/station/target_station = targets[desc]
 		if(!target_station || !target_station.teleporter_hub)
 			return

code/game/machinery/doors/airlock.dm

@@ -1240,7 +1240,7 @@
 
 	// reads from the airlock painter's `available paintjob` list. lets the player choose a paint option, or cancel painting
 	var/current_paintjob = tgui_input_list(user, "Paintjob for this airlock", "Customize", sort_list(painter.available_paint_jobs))
-	if(!current_paintjob) // if the user clicked cancel on the popup, return
+	if(isnull(current_paintjob)) // if the user clicked cancel on the popup, return
 		return
 
 	var/airlock_type = painter.available_paint_jobs["[current_paintjob]"] // get the airlock type path associated with the airlock name the user just chose
@@ -1390,7 +1390,7 @@
 			if(!electronics)
 				ae = new/obj/item/electronics/airlock(loc)
 				gen_access()
-				if(req_one_access.len)
+				if(length(req_one_access))
 					ae.one_access = 1
 					ae.accesses = req_one_access
 				else

code/game/machinery/doors/poddoor.dm

@@ -31,9 +31,10 @@
 		return
 	if (deconstruction != BLASTDOOR_FINISHED)
 		return
-	var/change_id = input("Set the shutters/blast door/blast door controllers ID. It must be a number between 1 and 100.", "ID", id) as num|null
-	if(change_id)
-		id = clamp(round(change_id, 1), 1, 100)
+	var/change_id = tgui_input_number(user, "Set the door controllers ID", "Door Controller ID", id, 100, 1)
+	if(isnull(change_id))
+		return
+	id = round(change_id)
 	to_chat(user, span_notice("You change the ID to [id]."))
 	balloon_alert(user, "ID changed")
 

code/game/machinery/hologram.dm

@@ -325,7 +325,9 @@ Possible to do for anyone motivated enough:
 						LAZYADD(callnames[A], I)
 				callnames -= get_area(src)
 				var/result = tgui_input_list(usr, "Choose an area to call", "Holocall", sort_names(callnames))
-				if(QDELETED(usr) || !result || outgoing_call)
+				if(isnull(result))
+					return
+				if(QDELETED(usr) || outgoing_call)
 					return
 				if(usr.loc == loc)
 					var/input = text2num(params["headcall"])
@@ -753,15 +755,15 @@ For the other part of the code, check silicon say.dm. Particularly robot talk.*/
 	if(time_delta >= 1)
 		disk.record.entries += list(list(HOLORECORD_DELAY,time_delta))
 	disk.record.entries += list(list(HOLORECORD_SAY,message))
-	if(disk.record.entries.len >= HOLORECORD_MAX_LENGTH)
+	if(length(disk.record.entries) >= HOLORECORD_MAX_LENGTH)
 		record_stop()
 
 /obj/machinery/holopad/proc/replay_entry(entry_number)
 	if(!replay_mode)
 		return
-	if (!disk.record.entries.len) // check for zero entries such as photographs and no text recordings
+	if (!length(disk.record.entries)) // check for zero entries such as photographs and no text recordings
 		return // and pretty much just display them statically untill manually stopped
-	if(disk.record.entries.len < entry_number)
+	if(length(disk.record.entries) < entry_number)
 		if(loop_mode)
 			entry_number = 1
 		else

code/game/machinery/newscaster.dm

@@ -553,7 +553,10 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/newscaster/security_unit, 30)
 			for(var/datum/newscaster/feed_channel/F in GLOB.news_network.network_channels)
 				if( (!F.locked || F.author == scanned_user) && !F.censored)
 					available_channels += F.channel_name
-			channel_name = input(usr, "Choose receiving Feed Channel", "Network Channel Handler") in sort_list(available_channels)
+			var/channel_choice = tgui_input_list(usr, "Choose receiving Feed Channel", "Network Channel Handler", sort_list(available_channels))
+			if(isnull(channel_choice))
+				return
+			channel_name = channel_choice
 			updateUsrDialog()
 		else if(href_list["set_new_message"])
 			var/temp_message = tgui_input_text(usr, "Write your Feed story", "Network Channel Handler", msg, multiline = TRUE)

code/game/machinery/porta_turret/portable_turret_construct.dm

@@ -181,13 +181,13 @@
 				return
 
 	if(istype(I, /obj/item/pen)) //you can rename turrets like bots!
-		var/t = stripped_input(user, "Enter new turret name", name, finish_name)
-		if(!t)
+		var/choice = tgui_input_text(user, "Enter a new turret name", "Turret Classification", finish_name, MAX_NAME_LEN)
+		if(!choice)
 			return
-		if(!Adjacent(user))
+		if(!user.canUseTopic(src, BE_CLOSE))
 			return
 
-		finish_name = t
+		finish_name = choice
 		return
 	return ..()
 

code/game/machinery/syndicatebomb.dm

@@ -198,17 +198,19 @@
 	notify_ghosts("\A [src] has been activated at [get_area(src)]!", source = src, action = NOTIFY_ORBIT, flashwindow = FALSE, header = "Bomb Planted")
 
 /obj/machinery/syndicatebomb/proc/settings(mob/user)
+	if(!user.canUseTopic(src, !issilicon(user)))
+		return
 	var/new_timer = tgui_input_number(user, "Set the timer", "Countdown", timer_set, maximum_timer, minimum_timer)
 	if (isnull(new_timer))
 		return
-	new_timer = round(new_timer)
-	if(in_range(src, user) && isliving(user)) //No running off and setting bombs from across the station
-		timer_set = clamp(new_timer, minimum_timer, maximum_timer)
+	if(!user.canUseTopic(src, !issilicon(user)))
+		return
+	timer_set = round(new_timer)
 	loc.visible_message(span_notice("[icon2html(src, viewers(src))] timer set for [timer_set] seconds."))
 	var/choice = tgui_alert(user, "Would you like to start the countdown now?", "Bomb Timer", list("Yes","No"))
 	if(choice != "Yes")
 		return
-	if(!in_range(src, user) || !isliving(user))
+	if(!user.canUseTopic(src, !issilicon(user)))
 		return
 	if(active)
 		to_chat(user, span_warning("The bomb is already active!"))

code/game/machinery/telecomms/computers/message.dm

@@ -288,10 +288,11 @@
 			for (var/obj/machinery/telecomms/message_server/M in GLOB.telecomms_list)
 				message_servers += M
 
-			if(message_servers.len > 1)
+			if(length(message_servers) > 1)
 				linkedServer = tgui_input_list(usr, "Please select a server", "Server Selection", message_servers)
+				if(linkedServer)
 					message = span_alert("NOTICE: Server selected.")
-			else if(message_servers.len > 0)
+			else if(length(message_servers) > 0)
 				linkedServer = message_servers[1]
 				message = span_notice("NOTICE: Only Single Server Detected - Server selected.")
 			else
@@ -388,7 +389,7 @@
 					if("Recepient")
 						//Get out list of viable PDAs
 						var/list/obj/item/pda/sendPDAs = get_viewable_pdas()
-						if(GLOB.PDAs && GLOB.PDAs.len > 0)
+						if(GLOB.PDAs && length(GLOB.PDAs) > 0)
 							customrecepient = tgui_input_list(usr, "Select a PDA from the list", "PDA Selection", sendPDAs)
 						else
 							customrecepient = null

code/game/objects/buckling.dm

@@ -18,8 +18,10 @@
 	if(.)
 		return
 	if(can_buckle && has_buckled_mobs())
-		if(buckled_mobs.len > 1)
-			var/unbuckled = input(user, "Who do you wish to unbuckle?","Unbuckle Who?") as null|mob in sort_names(buckled_mobs)
+		if(length(buckled_mobs) > 1)
+			var/mob/living/unbuckled = tgui_input_list(user, "Who do you wish to unbuckle?", "Unbuckle", sort_names(buckled_mobs))
+			if(isnull(unbuckled))
+				return
 			if(user_unbuckle_mob(unbuckled,user))
 				return TRUE
 		else
@@ -44,8 +46,10 @@
 	if(.)
 		return
 	if(Adjacent(user) && can_buckle && has_buckled_mobs())
-		if(buckled_mobs.len > 1)
-			var/unbuckled = input(user, "Who do you wish to unbuckle?","Unbuckle Who?") as null|mob in sort_names(buckled_mobs)
+		if(length(buckled_mobs) > 1)
+			var/mob/living/unbuckled = tgui_input_list(user, "Who do you wish to unbuckle?", "Unbuckle", sort_names(buckled_mobs))
+			if(isnull(unbuckled))
+				return
 			return user_unbuckle_mob(unbuckled,user)
 		else
 			return user_unbuckle_mob(buckled_mobs[1], user)
@@ -71,7 +75,7 @@
 /atom/movable/proc/has_buckled_mobs()
 	if(!buckled_mobs)
 		return FALSE
-	if(buckled_mobs.len)
+	if(length(buckled_mobs))
 		return TRUE
 
 /**

code/game/objects/items.dm

@@ -419,7 +419,9 @@ GLOBAL_DATUM_INIT(fire_overlay, /mutable_appearance, mutable_appearance('icons/e
 		affixes.Add(suffixes)
 
 		//admin picks, cleanup the ones we didn't do and handle chosen
-		var/picked_affix_name = input(usr, "Choose an affix to add to [src]...", "Enchant [src]") as null|anything in affixes
+		var/picked_affix_name = tgui_input_list(usr, "Affix to add to [src]", "Enchant [src]", affixes)
+		if(isnull(picked_affix_name))
+			return
 		if(!affixes[picked_affix_name] || QDELETED(src))
 			return
 		var/datum/fantasy_affix/affix = affixes[picked_affix_name]

code/game/objects/items/AI_modules.dm

@@ -246,15 +246,10 @@ AI MODULES
 	laws = list("")
 
 /obj/item/ai_module/supplied/freeform/attack_self(mob/user)
-	var/newpos = input("Please enter the priority for your new law. Can only write to law sectors 15 and above.", "Law Priority (15+)", lawpos) as num|null
-	if(newpos == null)
+	var/newpos = tgui_input_number(user, "Please enter the priority for your new law. Can only write to law sectors 15 and above.", "Law Priority ", lawpos, 50, 15)
+	if(isnull(newpos))
 		return
-	if(newpos < 15)
-		var/response = tgui_alert(usr, "Error: The law priority of [newpos] is invalid,  Law priorities below 14 are reserved for core laws,  Would you like to change that that to 15?", "Invalid law priority", list("Change to 15", "Cancel"))
-		if (!response || response == "Cancel")
-			return
-		newpos = 15
-	lawpos = min(newpos, 50)
+	lawpos = round(newpos)
 	var/targName = tgui_input_text(user, "Enter a new law for the AI.", "Freeform Law Entry", laws[1], CONFIG_GET(number/max_law_len), TRUE)
 	if(!targName)
 		return
@@ -290,12 +285,8 @@ AI MODULES
 	var/lawpos = 1
 
 /obj/item/ai_module/remove/attack_self(mob/user)
-	lawpos = input("Please enter the law you want to delete.", "Law Number", lawpos) as num|null
-	if(lawpos == null)
-		return
-	if(lawpos <= 0)
-		to_chat(user, span_warning("Error: The law number of [lawpos] is invalid."))
-		lawpos = 1
+	lawpos = tgui_input_number(user, "Law to delete", "Law Removal", lawpos, 50, 1)
+	if(isnull(lawpos))
 		return
 	to_chat(user, span_notice("Law [lawpos] selected."))
 	..()

code/game/objects/items/cards_ids.dm

@@ -459,7 +459,7 @@
 		to_chat(user, span_warning("[src] doesn't have a linked account to deposit into!"))
 		return FALSE
 
-	if (!money || !money.len)
+	if (!money || !length(money))
 		return FALSE
 
 	var/total = 0
@@ -489,49 +489,38 @@
 	. = FALSE
 	var/datum/bank_account/old_account = registered_account
 
-	var/new_bank_id = input(user, "Enter your account ID number.", "Account Reclamation", 111111) as num | null
-
+	var/new_bank_id = tgui_input_number(user, "Enter your account ID number", "Account Reclamation", 111111, 999999, 111111)
 	if(isnull(new_bank_id))
 		return
-
 	if(!alt_click_can_use_id(user))
 		return
-	if(!new_bank_id || new_bank_id < 111111 || new_bank_id > 999999)
-		to_chat(user, span_warning("The account ID number needs to be between 111111 and 999999."))
-		return
 	if(registered_account && registered_account.account_id == new_bank_id)
 		to_chat(user, span_warning("The account ID was already assigned to this card."))
 		return
-
-	var/datum/bank_account/B = SSeconomy.bank_accounts_by_id["[new_bank_id]"]
-	if(B)
-		if (old_account)
-			old_account.bank_cards -= src
-
-		B.bank_cards += src
-		registered_account = B
-		to_chat(user, span_notice("The provided account has been linked to this ID card."))
-
-		return TRUE
-
+	var/datum/bank_account/account = SSeconomy.bank_accounts_by_id["[new_bank_id]"]
+	if(isnull(account))
 		to_chat(user, span_warning("The account ID number provided is invalid."))
 		return
+	if(old_account)
+		old_account.bank_cards -= src
+	account.bank_cards += src
+	registered_account = account
+	to_chat(user, span_notice("The provided account has been linked to this ID card."))
+	return TRUE
 
 /obj/item/card/id/AltClick(mob/living/user)
 	if(!alt_click_can_use_id(user))
 		return
-
 	if(!registered_account)
 		set_new_account(user)
 		return
-
 	if (registered_account.being_dumped)
 		registered_account.bank_card_talk(span_warning("内部服务器错误"), TRUE)
 		return
-
-	var/amount_to_remove = FLOOR(input(user, "How much do you want to withdraw? Current Balance: [registered_account.account_balance]", "Withdraw Funds", 5) as num|null, 1)
-
-	if(!amount_to_remove || amount_to_remove < 0)
+	var/amount_to_remove = round(tgui_input_number(user, "How much do you want to withdraw?", "Withdraw Funds", 1, registered_account.account_balance, 1))
+	if(isnull(amount_to_remove))
+		return
+	if(amount_to_remove < 1 || amount_to_remove > registered_account.account_balance)
 		return
 	if(!alt_click_can_use_id(user))
 		return
@@ -980,7 +969,8 @@
 /obj/item/card/id/advanced/prisoner/attackby(obj/item/card/id/C, mob/user)
 	..()
 	var/list/id_access = C.GetAccess()
-	if(ACCESS_BRIG in id_access)
+	if(!(ACCESS_BRIG in id_access))
+		return
 	if(timed)
 		timed = FALSE
 		time_to_assign = initial(time_to_assign)
@@ -988,9 +978,10 @@
 		STOP_PROCESSING(SSobj, src)
 		to_chat(user, "Restating prisoner ID to default parameters.")
 		return
-		time_to_assign = input(user,"Set sentence time in seconds.","Set sentence time in seconds.",0) as num|null
+	var/choice = tgui_input_number(user, "Sentence time in seconds", "Sentencing")
 	if(isnull(time_to_assign) || !user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 		return
+	time_to_assign = round(choice)
 	to_chat(user, "You set the sentence time to [time_to_assign] seconds.")
 	timed = TRUE
 
@@ -1271,7 +1262,7 @@
 			return
 		if(popup_input == "Forge/Reset")
 			if(!forged)
-				var/input_name = stripped_input(user, "What name would you like to put on this card? Leave blank to randomise.", "Agent card name", registered_name ? registered_name : (ishuman(user) ? user.real_name : user.name), MAX_NAME_LEN)
+				var/input_name = tgui_input_text(user, "What name would you like to put on this card? Leave blank to randomise.", "Agent card name", registered_name ? registered_name : (ishuman(user) ? user.real_name : user.name), MAX_NAME_LEN)
 				input_name = sanitize_name(input_name)
 				if(!input_name)
 					// Invalid/blank names give a randomly generated one.
@@ -1298,18 +1289,17 @@
 							var/fake_trim_name = "[trim.assignment] ([trim.trim_state])"
 							trim_list[fake_trim_name] = trim_path
 
-					var/selected_trim_path
-					selected_trim_path = input("Select trim to apply to your card.\nNote: This will not grant any trim accesses.", "Forge Trim", selected_trim_path) as null|anything in sort_list(trim_list, /proc/cmp_typepaths_asc)
+					var/selected_trim_path = tgui_input_list(user, "Select trim to apply to your card.\nNote: This will not grant any trim accesses.", "Forge Trim", sort_list(trim_list, /proc/cmp_typepaths_asc))
 					if(selected_trim_path)
 						SSid_access.apply_trim_to_chameleon_card(src, trim_list[selected_trim_path])
 
-				var/target_occupation = stripped_input(user, "What occupation would you like to put on this card?\nNote: This will not grant any access levels.", "Agent card job assignment", assignment ? assignment : "Assistant", MAX_MESSAGE_LEN)
+				var/target_occupation = tgui_input_text(user, "What occupation would you like to put on this card?\nNote: This will not grant any access levels.", "Agent card job assignment", assignment ? assignment : "Assistant")
 				if(target_occupation)
 					assignment = target_occupation
 
-				var/new_age = input(user, "Choose the ID's age:\n([AGE_MIN]-[AGE_MAX])", "Agent card age") as num|null
+				var/new_age = tgui_input_number(user, "Choose the ID's age", "Agent card age", AGE_MIN, AGE_MAX, AGE_MIN)
 				if(new_age)
-					registered_age = max(round(text2num(new_age)), 0)
+					registered_age = round(new_age)
 
 				if(tgui_alert(user, "Activate wallet ID spoofing, allowing this card to force itself to occupy the visible ID slot in wallets?", "Wallet ID Spoofing", list("Yes", "No")) == "Yes")
 					ADD_TRAIT(src, TRAIT_MAGNETIC_ID_CARD, CHAMELEON_ITEM_TRAIT)

code/game/objects/items/choice_beacon.dm

@@ -22,10 +22,14 @@
 
 /obj/item/choice_beacon/proc/generate_options(mob/living/M)
 	var/list/display_names = generate_display_names()
-	if(!display_names.len)
+	if(!length(display_names))
 		return
 	var/choice = tgui_input_list(M, "Which item would you like to order?", "Select an Item", display_names)
-	if(!choice || !M.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
+	if(isnull(choice))
+		return
+	if(isnull(display_names[choice]))
+		return
+	if(!M.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 		return
 
 	spawn_option(display_names[choice],M)

code/game/objects/items/circuitboards/machine_circuitboards.dm

@@ -455,7 +455,7 @@
 	if (is_special_type)
 		return FALSE
 	var/position = fridges_name_paths.Find(build_path, fridges_name_paths)
-	position = (position == fridges_name_paths.len) ? 1 : (position + 1)
+	position = (position == length(fridges_name_paths)) ? 1 : (position + 1)
 	build_path = fridges_name_paths[position]
 	to_chat(user, span_notice("You set the board to [fridges_name_paths[build_path]]."))
 	return TRUE
@@ -564,7 +564,11 @@
 		display_vending_names_paths = list()
 		for(var/path in vending_names_paths)
 			display_vending_names_paths[vending_names_paths[path]] = path
-	var/choice = input(user, "Choose a new brand", "Select an Item") as null|anything in sort_list(display_vending_names_paths)
+	var/choice = tgui_input_list(user, "Choose a new brand", "Select an Item", sort_list(display_vending_names_paths))
+	if(isnull(choice))
+		return
+	if(isnull(display_vending_names_paths[choice]))
+		return
 	set_type(display_vending_names_paths[choice])
 	return TRUE
 
@@ -734,11 +738,13 @@
 
 /obj/item/circuitboard/machine/medical_kiosk/multitool_act(mob/living/user)
 	. = ..()
-	var/new_cost = input("Set a new cost for using this medical kiosk.", "New cost", custom_cost) as num|null
-	if(!new_cost || (loc != user))
+	var/new_cost = tgui_input_number(user, "New cost for using this medical kiosk", "Pricing", custom_cost, 1000, 10)
+	if(isnull(new_cost))
+		return
+	if(loc != user)
 		to_chat(user, span_warning("You must hold the circuitboard to change its cost!"))
 		return
-	custom_cost = clamp(round(new_cost, 1), 10, 1000)
+	custom_cost = round(new_cost)
 	to_chat(user, span_notice("The cost is now set to [custom_cost]."))
 
 /obj/item/circuitboard/machine/medical_kiosk/examine(mob/user)

code/game/objects/items/cosmetics.dm

@@ -140,7 +140,9 @@
 						return
 					if(!user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 						return
-					var/new_style = input(user, "Select a facial hairstyle", "Grooming")  as null|anything in GLOB.facial_hairstyles_list
+					var/new_style = tgui_input_list(user, "Select a facial hairstyle", "Grooming", GLOB.facial_hairstyles_list)
+					if(isnull(new_style))
+						return
 					if(!get_location_accessible(H, location))
 						to_chat(user, span_warning("The mask is in the way!"))
 						return
@@ -186,7 +188,9 @@
 					return
 				if(!user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 					return
-				var/new_style = input(user, "Select a hairstyle", "Grooming")  as null|anything in GLOB.hairstyles_list
+				var/new_style = tgui_input_list(user, "Select a hairstyle", "Grooming", GLOB.hairstyles_list)
+				if(isnull(new_style))
+					return
 				if(!get_location_accessible(H, location))
 					to_chat(user, span_warning("The headgear is in the way!"))
 					return

code/game/objects/items/crayons.dm

@@ -248,7 +248,7 @@
 		if("select_colour")
 			. = can_change_colour && select_colour(usr)
 		if("enter_text")
-			var/txt = input(usr, "Choose what to write.", "Scribbles", text_buffer) as text|null
+			var/txt = tgui_input_text(usr, "Choose what to write", "Scribbles", text_buffer)
 			if(isnull(txt))
 				return
 			txt = crayon_text_strip(txt)

code/game/objects/items/credit_holochip.dm

@@ -101,7 +101,7 @@
 /obj/item/holochip/AltClick(mob/user)
 	if(!user.canUseTopic(src, BE_CLOSE, NO_DEXTERITY, FALSE, !iscyborg(user)))
 		return
-	var/split_amount = tgui_input_number(user, "How many credits do you want to extract from the holochip?", "Holochip")
+	var/split_amount = tgui_input_number(user, "How many credits do you want to extract from the holochip?", "Holochip", 1, credits, 1)
 	if(isnull(split_amount))
 		return
 	if(!user.canUseTopic(src, BE_CLOSE, NO_DEXTERITY, FALSE, !iscyborg(user)))

code/game/objects/items/devices/PDA/PDA.dm

@@ -618,8 +618,10 @@ GLOBAL_LIST_EMPTY(PDAs)
 					playsound(src, 'sound/machines/terminal_select.ogg', 15, TRUE)
 			if("Drone Phone")
 				var/alert_s = tgui_input_list(U, "Alert severity level", "Ping Drones", list("Low","Medium","High","Critical"))
+				if(isnull(alert_s))
+					return
 				var/area/A = get_area(U)
-				if(A && alert_s && !QDELETED(U))
+				if(A && !QDELETED(U))
 					var/msg = span_boldnotice("NON-DRONE PING: [U.name]: [alert_s] priority alert in [A.name]!")
 					_alert_drones(msg, TRUE, U)
 					to_chat(U, msg)
@@ -1264,8 +1266,7 @@ GLOBAL_LIST_EMPTY(PDAs)
 		plist[avoid_assoc_duplicate_keys(pda.owner, namecounts)] = pda
 
 	var/choice = tgui_input_list(user, "Please select a PDA", "PDA Messenger", sort_list(plist))
-
-	if (!choice)
+	if (isnull(choice))
 		return
 
 	var/selected = plist[choice]

code/game/objects/items/devices/desynchronizer.dm

@@ -35,11 +35,11 @@
 /obj/item/desynchronizer/AltClick(mob/living/user)
 	if(!user.canUseTopic(src, BE_CLOSE, NO_DEXTERITY, FALSE, !iscyborg(user)))
 		return
-	var/new_duration = input(user, "Set the duration (5-300):", "Desynchronizer", duration / 10) as null|num
-	if(new_duration)
+	var/new_duration = tgui_input_number(user, "Set the duration", "Desynchronizer", duration / 10, max_duration, 5 SECONDS)
+	if(isnull(new_duration))
+		return
 	new_duration = new_duration SECONDS
-		new_duration = clamp(new_duration, 50, max_duration)
-		duration = new_duration
+	duration = round(new_duration)
 	to_chat(user, span_notice("You set the duration to [DisplayTimeText(duration)]."))
 
 /obj/item/desynchronizer/proc/desync(mob/living/user)

code/game/objects/items/devices/pipe_painter.dm

@@ -24,7 +24,7 @@
 		user.visible_message(span_notice("[user] paints \the [P] [paint_color]."),span_notice("You paint \the [P] [paint_color]."))
 
 /obj/item/pipe_painter/attack_self(mob/user)
-	paint_color = tgui_input_list(usr, "Which colour do you want to use?","Pipe painter",GLOB.pipe_paint_colors)
+	paint_color = tgui_input_list(user, "Which colour do you want to use?", "Pipe painter", GLOB.pipe_paint_colors)
 
 /obj/item/pipe_painter/examine(mob/user)
 	. = ..()

code/game/objects/items/devices/polycircuit.dm

@@ -19,15 +19,15 @@
 	else
 		if(is_zero_amount(delete_if_zero = TRUE))
 			return
-		chosen_circuit = input("What type of circuit would you like to remove?", "Choose a Circuit Type", chosen_circuit) in list("airlock","firelock","fire alarm","air alarm","APC","cancel")
+		chosen_circuit = tgui_input_list(user, "Circuit to remove", "Circuit Removal", list("airlock","firelock","fire alarm","air alarm","APC"), chosen_circuit)
+		if(isnull(chosen_circuit))
+			to_chat(user, span_notice("You wisely avoid putting your hands anywhere near [src]."))
+			return
 		if(is_zero_amount(delete_if_zero = TRUE))
 			return
 		if(loc != user)
 			return
 		switch(chosen_circuit)
-			if("cancel")
-				to_chat(user, span_notice("You wisely avoid putting your hands anywhere near [src]."))
-				return
 			if("airlock")
 				circuit_type = /obj/item/electronics/airlock
 			if("firelock")

code/game/objects/items/devices/scanners.dm

@@ -917,7 +917,9 @@ GENE SCANNER
 		options += get_display_name(A)
 
 	var/answer = tgui_input_list(user, "Analyze Potential", "Sequence Analyzer", sort_list(options))
-	if(answer && ready && user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
+	if(isnull(answer))
+		return
+	if(ready && user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 		var/sequence
 		for(var/A in buffer) //this physically hurts but i dont know what anything else short of an assoc list
 			if(get_display_name(A) == answer)

code/game/objects/items/dyekit.dm

@@ -29,13 +29,15 @@
 		return //SKYRAT EDIT ADDITION
 
 	var/mob/living/carbon/human/human_target = target
-	var/beard_or_hair = input(user, "What do you want to dye?", "Character Preference")  as null|anything in list("Hair", "Facial Hair")
+	var/beard_or_hair = tgui_alert(user, "What do you want to dye?", "Character Preference", list("Hair", "Facial Hair"))
 	if(!beard_or_hair || !user.canUseTopic(src, BE_CLOSE, NO_DEXTERITY, FALSE))
 		return
 
 	var/list/choices = beard_or_hair == "Hair" ? GLOB.hair_gradients_list : GLOB.facial_hair_gradients_list
-	var/new_grad_style = input(user, "Choose a color pattern:", "Character Preference")  as null|anything in choices
-	if(!new_grad_style || !user.canUseTopic(src, BE_CLOSE, NO_DEXTERITY, FALSE))
+	var/new_grad_style = tgui_input_list(user, "Choose a color pattern", "Character Preference", choices)
+	if(isnull(new_grad_style))
+		return
+	if(!user.canUseTopic(src, BE_CLOSE, NO_DEXTERITY, FALSE))
 		return
 
 	var/new_grad_color = input(user, "Choose a secondary hair color:", "Character Preference",human_target.grad_color) as color|null

code/game/objects/items/grenades/plastic.dm

@@ -69,14 +69,11 @@
 	detonate()
 
 /obj/item/grenade/c4/attack_self(mob/user)
-	var/newtime = input(usr, "Please set the timer.", "Timer", 10) as num|null
-
+	var/newtime = tgui_input_number(usr, "Please set the timer", "C4 Timer", 10, 60000, 10)
 	if (isnull(newtime))
 		return
-
 	if(user.get_active_held_item() == src)
-		newtime = clamp(newtime, 10, 60000)
-		det_time = newtime
+		det_time = round(newtime)
 		to_chat(user, "Timer set for [det_time] seconds.")
 
 /obj/item/grenade/c4/afterattack(atom/movable/bomb_target, mob/user, flag)

code/game/objects/items/pinpointer.dm

@@ -139,15 +139,17 @@
 		names[crewmember_name] = H
 		name_counts[crewmember_name] = 1
 
-	if(!names.len)
+	if(!length(names))
 		user.visible_message(span_notice("[user]'s pinpointer fails to detect a signal."), span_notice("Your pinpointer fails to detect a signal."))
 		return
-
-	var/A = input(user, "Person to track", "Pinpoint") in sort_list(names)
-	if(!A || QDELETED(src) || !user || !user.is_holding(src) || user.incapacitated())
+	var/pinpoint_target = tgui_input_list(user, "Person to track", "Pinpoint", sort_list(names))
+	if(isnull(pinpoint_target))
 		return
-
-	target = names[A]
+	if(isnull(names[pinpoint_target]))
+		return
+	if(QDELETED(src) || !user || !user.is_holding(src) || user.incapacitated())
+		return
+	target = names[pinpoint_target]
 	toggle_on()
 	user.visible_message(span_notice("[user] activates [user.p_their()] pinpointer."), span_notice("You activate your pinpointer."))
 

code/game/objects/items/scrolls.dm

@@ -40,27 +40,30 @@
  * * user The mob that is being teleported
  */
 /obj/item/teleportation_scroll/proc/teleportscroll(mob/user)
-	var/A
-
-	A = input(user, "Area to jump to", "BOOYEA", A) as null|anything in GLOB.teleportlocs
-	if(!src || QDELETED(src) || !user || !user.is_holding(src) || user.incapacitated() || !A || !uses)
+	if(!length(GLOB.teleportlocs))
+		to_chat(user, span_warning("There are no locations available"))
 		return
-	var/area/thearea = GLOB.teleportlocs[A]
+	var/jump_target = tgui_input_list(user, "Area to jump to", "BOOYEA", GLOB.teleportlocs)
+	if(isnull(jump_target))
+		return
+	if(!src || QDELETED(src) || !user || !user.is_holding(src) || user.incapacitated() || !uses)
+		return
+	var/area/thearea = GLOB.teleportlocs[jump_target]
 
 	var/datum/effect_system/smoke_spread/smoke = new
 	smoke.set_up(2, user.loc)
 	smoke.attach(user)
 	smoke.start()
-	var/list/L = list()
-	for(var/turf/T in get_area_turfs(thearea.type))
-		if(!T.is_blocked_turf())
-			L += T
+	var/list/possible_locations = list()
+	for(var/turf/target_turf in get_area_turfs(thearea.type))
+		if(!target_turf.is_blocked_turf())
+			possible_locations += target_turf
 
-	if(!L.len)
-		to_chat(user, span_warning("The spell matrix was unable to locate a suitable teleport destination for an unknown reason. Sorry."))
+	if(!length(possible_locations))
+		to_chat(user, span_warning("The spell matrix was unable to locate a suitable teleport destination for an unknown reason."))
 		return
 
-	if(do_teleport(user, pick(L), channel = TELEPORT_CHANNEL_MAGIC, forced = TRUE))
+	if(do_teleport(user, pick(possible_locations), channel = TELEPORT_CHANNEL_MAGIC, forced = TRUE))
 		smoke.start()
 		uses--
 		if(!uses)

code/game/objects/items/teleportation.dm

@@ -186,8 +186,10 @@
 
 	locations["None (Dangerous)"] = PORTAL_LOCATION_DANGEROUS
 
-	var/teleport_location_key = input(user, "Please select a teleporter to lock in on.", "Hand Teleporter") as null|anything in locations
-	if (!teleport_location_key || user.get_active_held_item() != src || user.incapacitated())
+	var/teleport_location_key = tgui_input_list(user, "Teleporter to lock on", "Hand Teleporter", sort_list(locations))
+	if (isnull(teleport_location_key))
+		return
+	if(user.get_active_held_item() != src || user.incapacitated())
 		return
 
 	// Not always a datum, but needed for IS_WEAKREF_OF to cast properly.
@@ -210,7 +212,7 @@
 
 /// Takes either PORTAL_LOCATION_DANGEROUS or an /obj/machinery/computer/teleport/computer.
 /obj/item/hand_tele/proc/try_create_portal_to(mob/user, teleport_location)
-	if (active_portal_pairs.len >= max_portal_pairs)
+	if (length(active_portal_pairs) >= max_portal_pairs)
 		user.show_message(span_notice("[src] is recharging!"))
 		return
 

code/game/objects/items/wayfinding.dm

@@ -253,20 +253,24 @@
 	if (!owner)
 		owner = user.real_name
 
-	if(beacons.len)
+	if(length(beacons))
 		beacons.Cut()
 	for(var/obj/machinery/navbeacon/B in GLOB.wayfindingbeacons)
 		beacons[B.codes["wayfinding"]] = B
 
-	if(!beacons.len)
+	if(!length(beacons))
 		to_chat(user, span_notice("Your pinpointer fails to detect a signal."))
 		return
 
-	var/A = tgui_input_list(user, "Select a location", "Pinpoint", sort_list(beacons))
-	if(!A || QDELETED(src) || !user || !user.is_holding(src) || user.incapacitated())
+	var/wayfind_target = tgui_input_list(user, "Select a location", "Pinpoint", sort_list(beacons))
+	if(isnull(wayfind_target))
 		return
-
-	target = beacons[A]
+	if(isnull(beacons[wayfind_target]))
+		to_chat(user, span_warning("Your pinpointer fails to detect a signal."))
+		return
+	if(QDELETED(src) || !user || !user.is_holding(src) || user.incapacitated())
+		return
+	target = beacons[wayfind_target]
 	toggle_on()
 	to_chat(user, span_notice("You activate your pinpointer."))
 

code/game/objects/structures/barsigns.dm

@@ -127,7 +127,7 @@
 
 /obj/structure/sign/barsign/proc/pick_sign(mob/user)
 	var/picked_name = tgui_input_list(user, "Available Signage", "Bar Sign", sort_list(get_bar_names()))
-	if(!picked_name)
+	if(isnull(picked_name))
 		return
 	chosen_sign = set_sign_by_name(picked_name)
 	SSblackbox.record_feedback("tally", "barsign_picked", 1, chosen_sign.type)

code/game/objects/structures/bonfire.dm

@@ -41,8 +41,8 @@
 /obj/structure/bonfire/attackby(obj/item/used_item, mob/living/user, params)
 	if(istype(used_item, /obj/item/stack/rods) && !can_buckle && !grill)
 		var/obj/item/stack/rods/rods = used_item
-		var/choice = input(user, "What would you like to construct?", "Bonfire") as null|anything in list("Stake","Grill")
-		if(!choice)
+		var/choice = tgui_alert(user, "What would you like to construct?", "Bonfire", list("Stake","Grill"))
+		if(isnull(choice))
 			return
 		rods.use(1)
 		switch(choice)

code/game/objects/structures/construction_console/construction_actions.dm

@@ -67,7 +67,11 @@
 	if(..())
 		return
 	var/list/buildlist = list("Walls and Floors" = RCD_FLOORWALL, "Airlocks" = RCD_AIRLOCK, "Deconstruction" = RCD_DECONSTRUCT, "Windows and Grilles" = RCD_WINDOWGRILLE)
-	var/buildmode = input(owner, "Set construction mode.", "Base Console", null) in buildlist
+	var/buildmode = tgui_input_list(owner, "Set construction mode", "Base Console", buildlist)
+	if(isnull(buildmode))
+		return
+	if(isnull(buildlist[buildmode]))
+		return
 	check_rcd()
 	base_console.internal_rcd.construction_mode = buildlist[buildmode]
 	to_chat(owner, "Build mode is now [buildmode].")

code/game/objects/structures/displaycase.dm

@@ -508,14 +508,14 @@
 				playsound(src, 'sound/machines/buzz-sigh.ogg', 50, TRUE)
 				return
 
-			var/new_price_input = input(usr,"Set the sale price for this vend-a-tray.","new price",0) as num|null
+			var/new_price_input = tgui_input_number(usr, "Sale price for this vend-a-tray", "New Price", 10, 1000, 1)
 			if(isnull(new_price_input) || (payments_acc != potential_acc.registered_account))
 				to_chat(usr, span_warning("[src] rejects your new price."))
 				return
 			if(!usr.canUseTopic(src, BE_CLOSE, FALSE, NO_TK) )
 				to_chat(usr, span_warning("You need to get closer!"))
 				return
-			new_price_input = clamp(round(new_price_input, 1), 10, 1000)
+			new_price_input = round(new_price_input)
 			sale_price = new_price_input
 			to_chat(usr, span_notice("The cost is now set to [sale_price]."))
 			SStgui.update_uis(src)

code/game/objects/structures/door_assembly.dm

@@ -51,7 +51,7 @@
 
 /obj/structure/door_assembly/attackby(obj/item/W, mob/user, params)
 	if(istype(W, /obj/item/pen))
-		var/t = tgui_input_text(user, "Enter the name for the door.", name, created_name, MAX_NAME_LEN)
+		var/t = tgui_input_text(user, "Enter the name for the door", "Airlock Renaming", created_name, MAX_NAME_LEN)
 		if(!t)
 			return
 		if(!in_range(src, usr) && loc != usr)

code/game/objects/structures/dresser.dm

@@ -28,44 +28,47 @@
 		return
 	if(!Adjacent(user))//no tele-grooming
 		return
-	if(ishuman(user))
-		var/mob/living/carbon/human/H = user
+	if(!ishuman(user))
+		return
+	var/mob/living/carbon/human/dressing_human = user
 
-		if(H.dna && H.dna.species && (NO_UNDERWEAR in H.dna.species.species_traits))
+	if(dressing_human.dna && dressing_human.dna.species && (NO_UNDERWEAR in dressing_human.dna.species.species_traits))
 		to_chat(user, span_warning("You are not capable of wearing underwear."))
 		return
 
-		var/choice = input(user, "Underwear, Undershirt, or Socks?", "Changing") as null|anything in list("Underwear","Underwear Color","Undershirt","Undershirt Color","Socks","Socks Color") //SKYRAT EDIT ADDITION - Colorable Undershirt/Socks
+	var/choice = tgui_input_list(user, "Underwear, Undershirt, or Socks?", "Changing", list("Underwear", "Underwear Color", "Undershirt", "Socks", "Undershirt Color", "Socks Color")) //SKYRAT EDIT ADDITION - Colorable Undershirt/Socks
+	if(isnull(choice))
+		return
 
 	if(!Adjacent(user))
 		return
 	switch(choice)
 		if("Underwear")
-				var/new_undies = input(user, "Select your underwear", "Changing")  as null|anything in GLOB.underwear_list
+			var/new_undies = tgui_input_list(user, "Select your underwear", "Changing", GLOB.underwear_list)
 			if(new_undies)
-					H.underwear = new_undies
-
+				dressing_human.underwear = new_undies
 		if("Underwear Color")
-				var/new_underwear_color = input(H, "Choose your underwear color", "Underwear Color",H.underwear_color) as color|null
+			var/new_underwear_color = input(dressing_human, "Choose your underwear color", "Underwear Color", dressing_human.underwear_color) as color|null
 			if(new_underwear_color)
-					H.underwear_color = sanitize_hexcolor(new_underwear_color)
+				dressing_human.underwear_color = sanitize_hexcolor(new_underwear_color)
 		if("Undershirt")
-				var/new_undershirt = input(user, "Select your undershirt", "Changing") as null|anything in GLOB.undershirt_list
+			var/new_undershirt = tgui_input_list(user, "Select your undershirt", "Changing", GLOB.undershirt_list)
 			if(new_undershirt)
-					H.undershirt = new_undershirt
+				dressing_human.undershirt = new_undershirt
+		if("Socks")
+			var/new_socks = tgui_input_list(user, "Select your socks", "Changing", GLOB.socks_list)
+			if(new_socks)
+				dressing_human.socks = new_socks
 		//SKYRAT EDIT ADDITION BEGIN - Colorable Undershirt/Socks
 		if("Undershirt Color")
-				var/new_undershirt_color = input(H, "Choose your undershirt color", "Undershirt Color",H.undershirt_color) as color|null
+			var/new_undershirt_color = input(dressing_human, "Choose your undershirt color", "Undershirt Color", dressing_human.undershirt_color) as color|null
 			if(new_undershirt_color)
-					H.undershirt_color = sanitize_hexcolor(new_undershirt_color)
-			if("Socks")
-				var/new_socks = input(user, "Select your socks", "Changing") as null|anything in GLOB.socks_list
-				if(new_socks)
-					H.socks= new_socks
+				dressing_human.undershirt_color = sanitize_hexcolor(new_undershirt_color)
 		if("Socks Color")
-				var/new_socks_color = input(H, "Choose your socks color", "Socks Color",H.socks_color) as color|null
+			var/new_socks_color = input(dressing_human, "Choose your socks color", "Socks Color", dressing_human.socks_color) as color|null
 			if(new_socks_color)
-					H.socks_color = sanitize_hexcolor(new_socks_color)
+				dressing_human.socks_color = sanitize_hexcolor(new_socks_color)
 		//SKYRAT EDIT ADDITION END - Colorable Undershirt/Socks
-		add_fingerprint(H)
-		H.update_body()
+
+	add_fingerprint(dressing_human)
+	dressing_human.update_body()

code/game/objects/structures/lavaland/geyser.dm

@@ -178,8 +178,9 @@
 	if(!istype(user) || !user.canUseTopic(src, BE_CLOSE))
 		return
 
-	var/new_layer = input("Select a layer", "Layer") as null|anything in layers
-	if(new_layer)
+	var/new_layer = tgui_input_list(user, "Select a layer", "Layer", layers)
+	if(isnull(new_layer))
+		return
 	target_layer = layers[new_layer]
 
 ///A faster reinforced plunger

code/game/objects/structures/mirror.dm

@@ -30,21 +30,24 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/mirror, 28)
 
 	//handle facial hair (if necessary)
 	if(hairdresser.gender != FEMALE)
-		var/new_style = input(user, "Select a facial hairstyle", "Grooming")  as null|anything in GLOB.facial_hairstyles_list
+		var/new_style = tgui_input_list(user, "Select a facial hairstyle", "Grooming", GLOB.facial_hairstyles_list)
+		if(isnull(new_style))
+			return TRUE
 		if(!user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 			return TRUE //no tele-grooming
-		if(new_style)
 		hairdresser.facial_hairstyle = new_style
 	else
 		hairdresser.facial_hairstyle = "Shaved"
 
 	//handle normal hair
-	var/new_style = input(user, "Select a hairstyle", "Grooming")  as null|anything in GLOB.hairstyles_list
+	var/new_style = tgui_input_list(user, "Select a hairstyle", "Grooming", GLOB.hairstyles_list)
+	if(isnull(new_style))
+		return TRUE
 	if(!user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 		return TRUE //no tele-grooming
 	if(HAS_TRAIT(hairdresser, TRAIT_BALD))
 		to_chat(hairdresser, span_notice("If only growing back hair were that easy for you..."))
-	if(new_style)
+
 	hairdresser.hairstyle = new_style
 
 	hairdresser.update_hair()
@@ -132,7 +135,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/mirror, 28)
 /obj/structure/mirror/magic/Initialize(mapload)
 	. = ..()
 
-	if(selectable_races.len)
+	if(length(selectable_races))
 		return
 	for(var/datum/species/species_type as anything in subtypesof(/datum/species))
 		if(initial(species_type.changesource_flags) & race_flags)
@@ -148,14 +151,16 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/mirror, 28)
 
 	var/mob/living/carbon/human/amazed_human = user
 
-	var/choice = input(user, "Something to change?", "Magical Grooming") as null|anything in list("name", "race", "gender", "hair", "eyes")
+	var/choice = tgui_input_list(user, "Something to change?", "Magical Grooming", list("name", "race", "gender", "hair", "eyes"))
+	if(isnull(choice))
+		return TRUE
 
 	if(!user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 		return TRUE
 
 	switch(choice)
 		if("name")
-			var/newname = sanitize_name(stripped_input(amazed_human, "Who are we again?", "Name change", amazed_human.name, MAX_NAME_LEN), allow_numbers = TRUE) //It's magic so whatever.
+			var/newname = sanitize_name(tgui_input_text(amazed_human, "Who are we again?", "Name change", amazed_human.name, MAX_NAME_LEN), allow_numbers = TRUE) //It's magic so whatever.
 			if(!newname)
 				return TRUE
 			if(!user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
@@ -168,8 +173,10 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/mirror, 28)
 				amazed_human.mind.name = newname
 
 		if("race")
-			var/racechoice = input(amazed_human, "What are we again?", "Race change") as null|anything in selectable_races
-			if(!racechoice || !selectable_races[racechoice])
+			var/racechoice = tgui_input_list(amazed_human, "What are we again?", "Race change", selectable_races)
+			if(isnull(racechoice))
+				return TRUE
+			if(selectable_races[racechoice])
 				return TRUE
 			if(!user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 				return TRUE
@@ -178,7 +185,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/mirror, 28)
 			amazed_human.set_species(newrace, icon_update = FALSE)
 
 			if(amazed_human.dna.species.use_skintones)
-				var/new_s_tone = input(user, "Choose your skin tone:", "Race change")  as null|anything in GLOB.skin_tones
+				var/new_s_tone = tgui_input_list(user, "Choose your skin tone", "Race change", GLOB.skin_tones)
 				if(new_s_tone)
 					amazed_human.skin_tone = new_s_tone
 					amazed_human.dna.update_ui_block(DNA_SKIN_TONE_BLOCK)
@@ -283,7 +290,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/structure/mirror, 28)
 	var/turf/user_turf = get_turf(user)
 	var/list/levels = SSmapping.levels_by_trait(ZTRAIT_SPACE_RUINS)
 	var/turf/dest
-	if(levels.len)
+	if(length(levels))
 		dest = locate(user_turf.x, user_turf.y, pick(levels))
 
 	user_turf.ChangeTurf(/turf/open/chasm, flags = CHANGETURF_INHERIT_AIR)

code/game/objects/structures/plaques/_plaques.dm

@@ -98,10 +98,10 @@
 		if(engraved)
 			to_chat(user, span_warning("This plaque has already been engraved."))
 			return
-		var/namechoice = input(user, "Title this plaque. (e.g. 'Best HoP Award', 'Great Ashwalker War Memorial')", "Plaque Customization")
+		var/namechoice = tgui_input_text(user, "Title this plaque. (e.g. 'Best HoP Award', 'Great Ashwalker War Memorial')", "Plaque Customization", max_length = MAX_NAME_LEN)
 		if(!namechoice)
 			return
-		var/descriptionchoice = input(user, "Engrave this plaque's text.", "Plaque Customization")
+		var/descriptionchoice = tgui_input_text(user, "Engrave this plaque's text", "Plaque Customization")
 		if(!descriptionchoice)
 			return
 		if(!Adjacent(user)) //Make sure user is adjacent still
@@ -130,10 +130,10 @@
 		if(engraved)
 			to_chat(user, span_warning("This plaque has already been engraved."))
 			return
-		var/namechoice = input(user, "Title this plaque. (e.g. 'Best HoP Award', 'Great Ashwalker War Memorial')", "Plaque Customization")
+		var/namechoice = tgui_input_text(user, "Title this plaque. (e.g. 'Best HoP Award', 'Great Ashwalker War Memorial')", "Plaque Customization", max_length = MAX_NAME_LEN)
 		if(!namechoice)
 			return
-		var/descriptionchoice = input(user, "Engrave this plaque's text.", "Plaque Customization")
+		var/descriptionchoice = tgui_input_text(user, "Engrave this plaque's text", "Plaque Customization")
 		if(!descriptionchoice)
 			return
 		if(!Adjacent(user)) //Make sure user is adjacent still

code/game/objects/structures/signs/_signs.dm

@@ -132,8 +132,8 @@
 	if(is_editable && istype(I, /obj/item/pen))
 		if(!length(GLOB.editable_sign_types))
 			CRASH("GLOB.editable_sign_types failed to populate")
-		var/choice = input(user, "Select a sign type.", "Sign Customization") as null|anything in GLOB.editable_sign_types
-		if(!choice)
+		var/choice = tgui_input_list(user, "Select a sign type", "Sign Customization", GLOB.editable_sign_types)
+		if(isnull(choice))
 			return
 		if(!Adjacent(user)) //Make sure user is adjacent still.
 			to_chat(user, span_warning("You need to stand next to the sign to change it!"))
@@ -160,14 +160,12 @@
 	if(is_editable && istype(I, /obj/item/pen))
 		if(!length(GLOB.editable_sign_types))
 			CRASH("GLOB.editable_sign_types failed to populate")
-		var/choice = input(user, "Select a sign type.", "Sign Customization") as null|anything in GLOB.editable_sign_types
-		if(!choice)
+		var/choice = tgui_input_list(user, "Select a sign type", "Sign Customization", GLOB.editable_sign_types)
+		if(isnull(choice))
 			return
 		if(!Adjacent(user)) //Make sure user is adjacent still.
 			to_chat(user, span_warning("You need to stand next to the sign to change it!"))
 			return
-		if(!choice)
-			return
 		user.visible_message(span_notice("You begin changing [src]."))
 		if(!do_after(user, 4 SECONDS, target = src))
 			return

code/game/objects/structures/spirit_board.dm

@@ -34,8 +34,10 @@
 		virgin = FALSE
 		notify_ghosts("Someone has begun playing with a [src.name] in [get_area(src)]!", source = src, header = "Spirit board")
 
-	planchette = input("Choose the letter.", "Seance!") as null|anything in list("A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z")
-	if(!planchette || !Adjacent(M) || next_use > world.time)
+	planchette = tgui_input_list(M, "Choose the letter.", "Seance!", list("A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"))
+	if(isnull(planchette))
+		return
+	if(!Adjacent(M) || next_use > world.time)
 		return
 	M.log_message("picked a letter on [src], which was \"[planchette]\".", LOG_GAME)
 	next_use = world.time + rand(30,50)

code/game/objects/structures/windoor_assembly.dm

@@ -245,7 +245,7 @@
 					ae.forceMove(drop_location())
 
 			else if(istype(W, /obj/item/pen))
-				var/t = tgui_input_text(user, "Enter the name for the door.", "Windoor", created_name, MAX_NAME_LEN)
+				var/t = tgui_input_text(user, "Enter the name for the door", "Windoor Renaming", created_name, MAX_NAME_LEN)
 				if(!t)
 					return
 				if(!in_range(src, usr) && loc != usr)

code/modules/admin/admin_investigate.dm

@@ -44,8 +44,9 @@
 
 	var/list/combined = sort_list(logs_present) + sort_list(logs_missing)
 
-	var/selected = input("Investigate what?", "Investigate") as null|anything in combined
-
+	var/selected = tgui_input_list(src, "Investigate what?", "Investigation", combined)
+	if(isnull(selected))
+		return
 	if(!(selected in combined) || selected == "---")
 		return
 

code/modules/admin/admin_verbs.dm

@@ -511,12 +511,12 @@ GLOBAL_PROTECT(admin_verbs_hideable)
 	set desc = "Cause an explosion of varying strength at your location."
 
 	var/list/choices = list("Small Bomb (1, 2, 3, 3)", "Medium Bomb (2, 3, 4, 4)", "Big Bomb (3, 5, 7, 5)", "Maxcap", "Custom Bomb")
-	var/choice = tgui_input_list(usr, "What size explosion would you like to produce? NOTE: You can do all this rapidly and in an IC manner (using cruise missiles!) with the Config/Launch Supplypod verb. WARNING: These ignore the maxcap", "Drop Bomb", choices)
+	var/choice = tgui_input_list(src, "What size explosion would you like to produce? NOTE: You can do all this rapidly and in an IC manner (using cruise missiles!) with the Config/Launch Supplypod verb. WARNING: These ignore the maxcap", "Drop Bomb", choices)
+	if(isnull(choice))
+		return
 	var/turf/epicenter = mob.loc
 
 	switch(choice)
-		if(null)
-			return
 		if("Small Bomb (1, 2, 3, 3)")
 			explosion(epicenter, devastation_range = 1, heavy_impact_range = 2, light_impact_range = 3, flash_range = 3, adminlog = TRUE, ignorecap = TRUE, explosion_cause = mob)
 		if("Medium Bomb (2, 3, 4, 4)")
@@ -800,7 +800,7 @@ GLOBAL_PROTECT(admin_verbs_hideable)
 
 					candidates = get_area_turfs(area)
 
-					if (candidates.len)
+					if (length(candidates))
 						k = 100
 
 						do

code/modules/admin/outfit_editor.dm

@@ -167,7 +167,7 @@
 			if(suit)
 				suit = new suit //initial() doesn't like lists
 				options = suit.allowed
-			if(!options.len) //nothing will happen, but don't let the user think it's broken
+			if(!length(options)) //nothing will happen, but don't let the user think it's broken
 				to_chat(owner, span_warning("No options available for the current suit."))
 
 		if("belt")
@@ -189,8 +189,12 @@
 		if("r_pocket")
 			choose_any_item(slot)
 
-	if(length(options))
-		set_item(slot, tgui_input_list(owner, "Choose an item", OUTFIT_EDITOR_NAME, options))
+	if(!length(options))
+		return
+	var/option = tgui_input_list(owner, "Choose an item", OUTFIT_EDITOR_NAME, options)
+	if(isnull(option))
+		return
+	set_item(slot, option)
 
 
 #undef OUTFIT_EDITOR_NAME

code/modules/admin/outfit_manager.dm

@@ -58,7 +58,10 @@
 			owner.holder.load_outfit(owner.mob)
 		if("copy")
 			var/datum/outfit/outfit = tgui_input_list(owner, "Pick an outfit to copy from", "Outfit Manager", subtypesof(/datum/outfit))
-			if(ispath(outfit))
+			if(isnull(outfit))
+				return
+			if(!ispath(outfit))
+				return
 			owner.open_outfit_editor(new outfit)
 
 	var/datum/outfit/target_outfit = locate(params["outfit"])

code/modules/admin/smites/imaginary_friend_special.dm

@@ -14,7 +14,9 @@
 	var/random_appearance
 
 /datum/smite/custom_imaginary_friend/configure(client/user)
-	friend_candidate_client = tgui_input_list(user, "Pick the player to put in control.", "New Imaginary Friend", sort_list(GLOB.clients))
+	friend_candidate_client = tgui_input_list(user, "Pick the player to put in control", "New Imaginary Friend", sort_list(GLOB.clients))
+	if(isnull(friend_candidate_client))
+		return
 
 	if(QDELETED(friend_candidate_client))
 		to_chat(user, span_notice("Selected player no longer has a client, aborting."))

code/modules/admin/topic.dm

@@ -1596,7 +1596,7 @@
 		if(!check_rights(R_ADMIN))
 			return
 		var/list/type_choices = typesof(/datum/station_goal)
-		var/picked = tgui_input_list(usr, "Choose goal type",, type_choices)
+		var/picked = tgui_input_list(usr, "Choose goal type", "Station Goal", type_choices)
 		if(!picked)
 			return
 		var/datum/station_goal/G = new picked()

code/modules/admin/verbs/SDQL2/SDQL_spells/spell_edit_menu.dm

@@ -322,7 +322,8 @@ GLOBAL_LIST_INIT_TYPED(sdql_spells, /obj/effect/proc_holder/spell, list())
 			saved_vars[params["name"]] = !saved_vars[params["name"]]
 		if("path_variable")
 			var/new_path = tgui_input_list(user, "Select type.", "Add SDQL Spell", typesof(text2path(params["root_path"])))
-			if(new_path)
+			if(isnull(new_path))
+				return
 			saved_vars[params["name"]] = new_path
 			var/datum/sample = new new_path
 			var/list/overrides = list_vars[special_var_lists[params["name"]]]

code/modules/admin/verbs/adminjump.dm

@@ -153,21 +153,26 @@
 		usr.forceMove(M.loc)
 		SSblackbox.record_feedback("tally", "admin_verb", 1, "Get Key") //If you are copy-pasting this, ensure the 2nd parameter is unique to the new proc!
 
-/client/proc/sendmob(mob/M in sort_mobs())
+/client/proc/sendmob(mob/jumper in sort_mobs())
 	set category = "Admin.Game"
 	set name = "Send Mob"
 	if(!src.holder)
 		to_chat(src, "Only administrators may use this command.", confidential = TRUE)
 		return
-	var/area/A = input(usr, "Pick an area.", "Pick an area") in GLOB.sortedAreas|null
-	if(A && istype(A))
-		var/list/turfs = get_area_turfs(A)
-		if(length(turfs) && M.forceMove(pick(turfs)))
-
-			log_admin("[key_name(usr)] teleported [key_name(M)] to [AREACOORD(M)]")
-			var/msg = "[key_name_admin(usr)] teleported [ADMIN_LOOKUPFLW(M)] to [AREACOORD(M)]"
+	if(!length(GLOB.sortedAreas))
+		to_chat(src, "No areas found.", confidential = TRUE)
+		return
+	var/area/target_area = tgui_input_list(src, "Pick an area", "Send Mob", GLOB.sortedAreas)
+	if(isnull(target_area))
+		return
+	if(!istype(target_area))
+		return
+	var/list/turfs = get_area_turfs(target_area)
+	if(length(turfs) && jumper.forceMove(pick(turfs)))
+		log_admin("[key_name(usr)] teleported [key_name(jumper)] to [AREACOORD(jumper)]")
+		var/msg = "[key_name_admin(usr)] teleported [ADMIN_LOOKUPFLW(jumper)] to [AREACOORD(jumper)]"
 		message_admins(msg)
-			admin_ticket_log(M, msg)
+		admin_ticket_log(jumper, msg)
 	else
 		to_chat(src, "Failed to move mob to a valid location.", confidential = TRUE)
 	SSblackbox.record_feedback("tally", "admin_verb", 1, "Send Mob") //If you are copy-pasting this, ensure the 2nd parameter is unique to the new proc!

code/modules/admin/verbs/borgpanel.dm

@@ -84,8 +84,9 @@
 		return
 	switch (action)
 		if ("set_charge")
-			var/newcharge = input("New charge (0-[borg.cell.maxcharge]):", borg.name, borg.cell.charge) as num|null
-			if (newcharge)
+			var/newcharge = tgui_input_number(usr, "Set new charge", borg.name, borg.cell.charge, borg.cell.maxcharge)
+			if (isnull(newcharge))
+				return
 			borg.cell.charge = clamp(newcharge, 0, borg.cell.maxcharge)
 			message_admins("[key_name_admin(user)] set the charge of [ADMIN_LOOKUPFLW(borg)] to [borg.cell.charge].")
 			log_silicon("[key_name(user)] set the charge of [key_name(borg)] to [borg.cell.charge].")

code/modules/admin/verbs/debug.dm

@@ -57,7 +57,7 @@ But you can call procs that are of type /mob/living/carbon/human/proc/ for that
 		if(C.key)
 			available.Add(C)
 	var/mob/choice = tgui_input_list(usr, "Choose a player to play the pAI", "Spawn pAI", sort_names(available))
-	if(!choice)
+	if(isnull(choice))
 		return
 	if(!isobserver(choice))
 		var/confirm = tgui_alert(usr, "[choice.key] isn't ghosting right now. Are you sure you want to yank them out of their body and place them in this pAI?", "Spawn pAI Confirmation", list("Yes", "No"))
@@ -534,8 +534,10 @@ But you can call procs that are of type /mob/living/carbon/human/proc/ for that
 	set category = "Debug"
 	set name = "Debug Mob Lists"
 	set desc = "For when you just gotta know"
-
-	switch(tgui_input_list(usr, "Which list?",, list("Players","Admins","Mobs","Living Mobs","Dead Mobs","Clients","Joined Clients")))
+	var/chosen_list = tgui_input_list(usr, "Which list?", "Select List", list("Players","Admins","Mobs","Living Mobs","Dead Mobs","Clients","Joined Clients"))
+	if(isnull(chosen_list))
+		return
+	switch(chosen_list)
 		if("Players")
 			to_chat(usr, jointext(GLOB.player_list,","), confidential = TRUE)
 		if("Admins")

code/modules/admin/verbs/manipulate_organs.dm

@@ -1,8 +1,8 @@
 /client/proc/manipulate_organs(mob/living/carbon/C in world)
 	set name = "Manipulate Organs"
 	set category = "Debug"
-	var/operation = input("Select organ operation.", "Organ Manipulation", "cancel") as null|anything in list("add organ", "add implant", "drop organ/implant", "remove organ/implant", "cancel")
-	if (!operation)
+	var/operation = tgui_input_list(usr, "Select organ operation", "Organ Manipulation", list("add organ", "add implant", "drop organ/implant", "remove organ/implant"))
+	if (isnull(operation))
 		return
 
 	var/list/organs = list()
@@ -12,8 +12,10 @@
 				var/dat = replacetext("[path]", "/obj/item/organ/", ":")
 				organs[dat] = path
 
-			var/obj/item/organ/organ = input("Select organ type:", "Organ Manipulation", null) as null|anything in organs
-			if(!organ)
+			var/obj/item/organ/organ = tgui_input_list(usr, "Select organ type", "Organ Manipulation", organs)
+			if(isnull(organ))
+				return
+			if(isnull(organs[organ]))
 				return
 			organ = organs[organ]
 			organ = new organ
@@ -26,8 +28,10 @@
 				var/dat = replacetext("[path]", "/obj/item/implant/", ":")
 				organs[dat] = path
 
-			var/obj/item/implant/organ = input("Select implant type:", "Organ Manipulation", null) as null|anything in organs
-			if(!organ)
+			var/obj/item/implant/organ = tgui_input_list(usr, "Select implant type", "Organ Manipulation", organs)
+			if(isnull(organ))
+				return
+			if(isnull(organs[organ]))
 				return
 			organ = organs[organ]
 			organ = new organ
@@ -44,12 +48,12 @@
 				var/obj/item/implant/I = X
 				organs["[I.name] ([I.type])"] = I
 
-			var/obj/item/organ = input("Select organ/implant:", "Organ Manipulation", null) as null|anything in organs
-			if(!organ)
+			var/obj/item/organ = tgui_input_list(usr, "Select organ/implant", "Organ Manipulation", organs)
+			if(isnull(organ))
+				return
+			if(isnull(organs[organ]))
 				return
 			organ = organs[organ]
-			if(!organ)
-				return
 			var/obj/item/organ/O
 			var/obj/item/implant/I
 

code/modules/admin/verbs/maprotation.dm

@@ -33,7 +33,7 @@
 
 		maprotatechoices[mapname] = VM
 	var/chosenmap = tgui_input_list(usr, "Choose a map to change to", "Change Map", sort_list(maprotatechoices)|"Custom")
-	if (!chosenmap)
+	if (isnull(chosenmap))
 		return
 
 	if(chosenmap == "Custom")

code/modules/admin/verbs/shuttlepanel.dm

@@ -33,8 +33,8 @@
 	options += "Delete Shuttle"
 	options += "Into The Sunset (delete & greentext 'escape')"
 
-	var/selection = input(user, "Select where to fly [name || id]:", "Fly Shuttle") as null|anything in options
-	if(!selection)
+	var/selection = tgui_input_list(user, "Select where to fly [name || id]:", "Fly Shuttle", options)
+	if(isnull(selection))
 		return
 
 	switch(selection)
@@ -77,8 +77,8 @@
 		if (canDock(S) == SHUTTLE_CAN_DOCK)
 			options[S.name || S.id] = S
 
-	var/selection = input(user, "Select the new arrivals destination:", "Fly Shuttle") as null|anything in options
-	if(!selection)
+	var/selection = tgui_input_list(user, "New arrivals destination", "Fly Shuttle", options)
+	if(isnull(selection))
 		return
 	target_dock = options[selection]
 	if(!QDELETED(target_dock))

code/modules/admin/view_variables/topic_basic.dm

@@ -62,7 +62,9 @@
 		names += "---Elements---"
 		names += sort_list(subtypesof(/datum/element), /proc/cmp_typepaths_asc)
 		var/result = tgui_input_list(usr, "Choose a component/element to add", "Add Component", names)
-		if(!usr || !result || result == "---Components---" || result == "---Elements---")
+		if(isnull(result))
+			return
+		if(!usr || result == "---Components---" || result == "---Elements---")
 			return
 		if(QDELETED(src))
 			to_chat(usr, "That thing doesn't exist anymore!", confidential = TRUE)
@@ -100,7 +102,9 @@
 		// We have to list every element here because there is no way to know what element is on this object without doing some sort of hack.
 		names += sort_list(subtypesof(/datum/element), /proc/cmp_typepaths_asc)
 		var/path = tgui_input_list(usr, "Choose a component/element to remove. All elements listed here may not be on the datum.", "Remove element", names)
-		if(!usr || !path || path == "---Components---" || path == "---Elements---")
+		if(isnull(path))
+			return
+		if(!usr || path == "---Components---" || path == "---Elements---")
 			return
 		if(QDELETED(src))
 			to_chat(usr, "That thing doesn't exist anymore!")

code/modules/antagonists/blob/powers.dm

@@ -71,7 +71,11 @@
 		for(var/i in 1 to GLOB.blob_nodes.len)
 			var/obj/structure/blob/special/node/B = GLOB.blob_nodes[i]
 			nodes["Blob Node #[i] ([get_area_name(B)])"] = B
-		var/node_name = input(src, "Choose a node to jump to.", "Node Jump") in nodes
+		var/node_name = tgui_input_list(src, "Choose a node to jump to", "Node Jump", nodes)
+		if(isnull(node_name))
+			return FALSE
+		if(isnull(nodes[node_name]))
+			return FALSE
 		var/obj/structure/blob/special/node/chosen_node = nodes[node_name]
 		if(chosen_node)
 			forceMove(chosen_node.loc)

code/modules/antagonists/changeling/powers/humanform.dm

@@ -16,7 +16,7 @@
 		names += "[prof.name]"
 
 	var/chosen_name = tgui_input_list(user, "Target DNA", "Transformation", sort_list(names))
-	if(!chosen_name)
+	if(isnull(chosen_name))
 		return
 
 	var/datum/changelingprofile/chosen_prof = changeling.get_dna(chosen_name)

code/modules/antagonists/cult/blood_magic.dm

@@ -40,15 +40,15 @@
 		break
 	if(rune)
 		limit = MAX_BLOODCHARGE
-	if(spells.len >= limit)
+	if(length(spells) >= limit)
 		if(rune)
 			to_chat(owner, span_cultitalic("You cannot store more than [MAX_BLOODCHARGE] spells. <b>Pick a spell to remove.</b>"))
 		else
 			to_chat(owner, span_cultitalic("<b><u>You cannot store more than [RUNELESS_MAX_BLOODCHARGE] spells without an empowering rune! Pick a spell to remove.</b></u>"))
 		var/nullify_spell = tgui_input_list(owner, "Spell to remove", "Current Spells", spells)
-		if(nullify_spell)
-			qdel(nullify_spell)
+		if(isnull(nullify_spell))
 			return
+		qdel(nullify_spell)
 	var/entered_spell_name
 	var/datum/action/innate/cult/blood_spell/BS
 	var/list/possible_spells = list()
@@ -58,13 +58,15 @@
 		possible_spells[cult_name] = J
 	possible_spells += "(REMOVE SPELL)"
 	entered_spell_name = tgui_input_list(owner, "Blood spell to prepare", "Spell Choices", possible_spells)
+	if(isnull(entered_spell_name))
+		return
 	if(entered_spell_name == "(REMOVE SPELL)")
 		var/nullify_spell = tgui_input_list(owner, "Spell to remove", "Current Spells", spells)
-		if(nullify_spell)
-			qdel(nullify_spell)
+		if(isnull(nullify_spell))
 			return
+		qdel(nullify_spell)
 	BS = possible_spells[entered_spell_name]
-	if(QDELETED(src) || owner.incapacitated() || !BS || (rune && !(locate(/obj/effect/rune/empower) in range(1, owner))) || (spells.len >= limit))
+	if(QDELETED(src) || owner.incapacitated() || !BS || (rune && !(locate(/obj/effect/rune/empower) in range(1, owner))) || (length(spells) >= limit))
 		return
 	to_chat(owner,span_warning("You begin to carve unnatural symbols into your flesh!"))
 	SEND_SOUND(owner, sound('sound/weapons/slice.ogg',0,1,10))
@@ -478,7 +480,7 @@
 		for(var/obj/effect/rune/teleport/teleport_rune as anything in GLOB.teleport_runes)
 			potential_runes[avoid_assoc_duplicate_keys(teleport_rune.listkey, teleportnames)] = teleport_rune
 
-		if(!potential_runes.len)
+		if(!length(potential_runes))
 			to_chat(user, span_warning("There are no valid runes to teleport to!"))
 			return
 
@@ -488,6 +490,11 @@
 			return
 
 		var/input_rune_key = tgui_input_list(user, "Rune to teleport to", "Teleportation Target", potential_runes) //we know what key they picked
+		if(isnull(input_rune_key))
+			return
+		if(isnull(potential_runes[input_rune_key]))
+			to_chat(user, span_warning("You must pick a valid rune!"))
+			return
 		var/obj/effect/rune/teleport/actual_selected_rune = potential_runes[input_rune_key] //what rune does that key correspond to?
 		if(QDELETED(src) || !user || !user.is_holding(src) || user.incapacitated() || !actual_selected_rune || !proximity)
 			return

code/modules/antagonists/cult/cult_items.dm

@@ -162,8 +162,8 @@ Striking a noncultist, however, will tear their flesh."}
 
 /obj/item/cult_bastard/examine(mob/user)
 	. = ..()
-	if(contents.len)
-		. += "<b>There are [contents.len] souls trapped within the sword's core.</b>"
+	if(length(contents))
+		. += "<b>There are [length(contents)] souls trapped within the sword's core.</b>"
 	else
 		. += "The sword appears to be quite lifeless."
 
@@ -227,7 +227,7 @@ Striking a noncultist, however, will tear their flesh."}
 			stone.attack(human_target, user)
 			if(!LAZYLEN(stone.contents))
 				qdel(stone)
-	if(istype(target, /obj/structure/constructshell) && contents.len)
+	if(istype(target, /obj/structure/constructshell) && length(contents))
 		var/obj/item/soulstone/stone = contents[1]
 		if(!istype(stone))
 			stone.forceMove(drop_location())
@@ -665,7 +665,10 @@ Striking a noncultist, however, will tear their flesh."}
 		to_chat(user, "That doesn't seem to do anything useful.")
 		return
 
-	if(istype(A, /obj/item))
+	if(!istype(A, /obj/item))
+		..()
+		to_chat(user, span_warning("\The [src] can only transport items!"))
+		return
 
 	var/list/cultists = list()
 	for(var/datum/mind/M as anything in get_antag_minds(/datum/antagonist/cult))
@@ -674,7 +677,7 @@ Striking a noncultist, however, will tear their flesh."}
 	var/mob/living/cultist_to_receive = tgui_input_list(user, "Who do you wish to call to [src]?", "Followers of the Geometer", (cultists - user))
 	if(!Adjacent(user) || !src || QDELETED(src) || user.incapacitated())
 		return
-		if(!cultist_to_receive)
+	if(isnull(cultist_to_receive))
 		to_chat(user, "<span class='cult italic'>You require a destination!</span>")
 		log_game("Void torch failed - no target")
 		return
@@ -696,11 +699,6 @@ Striking a noncultist, however, will tear their flesh."}
 	if(charges == 0)
 		qdel(src)
 
-	else
-		..()
-		to_chat(user, span_warning("\The [src] can only transport items!"))
-
-
 /obj/item/melee/cultblade/halberd
 	name = "bloody halberd"
 	desc = "A halberd with a volatile axehead made from crystallized blood. It seems linked to its creator. And, admittedly, more of a poleaxe than a halberd."

code/modules/antagonists/cult/runes.dm

@@ -97,10 +97,10 @@ Runes can either be invoked by one's self or with many different cultists. Each
 		to_chat(user, span_warning("You aren't able to understand the words of [src]."))
 		return
 	var/list/invokers = can_invoke(user)
-	if(invokers.len >= req_cultists)
+	if(length(invokers) >= req_cultists)
 		invoke(invokers)
 	else
-		to_chat(user, span_danger("You need [req_cultists - invokers.len] more adjacent cultists to use this rune in such a manner."))
+		to_chat(user, span_danger("You need [req_cultists - length(invokers)] more adjacent cultists to use this rune in such a manner."))
 		fail_invoke()
 
 /obj/effect/rune/attack_animal(mob/living/simple_animal/user, list/modifiers)
@@ -221,7 +221,7 @@ structure_check() searches for nearby cultist structures required for the invoca
 	for(var/mob/living/M in T)
 		if(!IS_CULTIST(M))
 			myriad_targets |= M
-	if(!myriad_targets.len)
+	if(!length(myriad_targets))
 		fail_invoke()
 		log_game("Offer rune failed - no eligible targets")
 		return
@@ -250,7 +250,7 @@ structure_check() searches for nearby cultist structures required for the invoca
 	rune_in_use = FALSE
 
 /obj/effect/rune/convert/proc/do_convert(mob/living/convertee, list/invokers)
-	if(invokers.len < 2)
+	if(length(invokers) < 2)
 		for(var/M in invokers)
 			to_chat(M, span_warning("You need at least two invokers to convert [convertee]!"))
 		log_game("Offer rune failed - tried conversion with one invoker")
@@ -307,7 +307,7 @@ structure_check() searches for nearby cultist structures required for the invoca
 		log_game("Offer rune failed - tried sacrificing already sacrificed target.")
 		return FALSE
 	//SKYRAT ADDITION END
-	if((((ishuman(sacrificial) || iscyborg(sacrificial)) && sacrificial.stat != DEAD) || C.cult_team.is_sacrifice_target(sacrificial.mind)) && invokers.len < 3)
+	if((((ishuman(sacrificial) || iscyborg(sacrificial)) && sacrificial.stat != DEAD) || C.cult_team.is_sacrifice_target(sacrificial.mind)) && length(invokers) < 3)
 		for(var/M in invokers)
 			to_chat(M, span_cultitalic("[sacrificial] is too greatly linked to the world! You need three acolytes!"))
 		log_game("Offer rune failed - not enough acolytes and target is living or sac target")
@@ -411,7 +411,7 @@ structure_check() searches for nearby cultist structures required for the invoca
 		if(teleport_rune != src && !is_away_level(teleport_rune.z))
 			potential_runes[avoid_assoc_duplicate_keys(teleport_rune.listkey, teleportnames)] = teleport_rune
 
-	if(!potential_runes.len)
+	if(!length(potential_runes))
 		to_chat(user, span_warning("There are no valid runes to teleport to!"))
 		log_game("Teleport rune failed - no other teleport runes")
 		fail_invoke()
@@ -425,6 +425,11 @@ structure_check() searches for nearby cultist structures required for the invoca
 		return
 
 	var/input_rune_key = tgui_input_list(user, "Rune to teleport to", "Teleportation Target", potential_runes) //we know what key they picked
+	if(isnull(input_rune_key))
+		return
+	if(isnull(potential_runes[input_rune_key]))
+		fail_invoke()
+		return
 	var/obj/effect/rune/teleport/actual_selected_rune = potential_runes[input_rune_key] //what rune does that key correspond to?
 	if(!Adjacent(user) || !src || QDELETED(src) || user.incapacitated() || !actual_selected_rune)
 		fail_invoke()
@@ -577,13 +582,15 @@ structure_check() searches for nearby cultist structures required for the invoca
 	for(var/mob/living/M in T.contents)
 		if(IS_CULTIST(M) && (M.stat == DEAD || !M.client || M.client.is_afk()))
 			potential_revive_mobs |= M
-	if(!potential_revive_mobs.len)
+	if(!length(potential_revive_mobs))
 		to_chat(user, "<span class='cult italic'>There are no dead cultists on the rune!</span>")
 		log_game("Raise Dead rune failed - no cultists to revive")
 		fail_invoke()
 		return
-	if(potential_revive_mobs.len > 1)
+	if(length(potential_revive_mobs) > 1)
 		mob_to_revive = tgui_input_list(user, "Cultist to revive", "Revive Cultist", potential_revive_mobs)
+		if(isnull(mob_to_revive))
+			return
 	else
 		mob_to_revive = potential_revive_mobs[1]
 	if(QDELETED(src) || !validness_checks(mob_to_revive, user))
@@ -684,10 +691,14 @@ structure_check() searches for nearby cultist structures required for the invoca
 	for(var/datum/mind/M as anything in get_antag_minds(/datum/antagonist/cult))
 		if(!(M.current in invokers) && M.current && M.current.stat != DEAD)
 			cultists |= M.current
+	if(length(cultists) <= 1)
+		to_chat(user, span_warning("There are no cultists to summon!"))
+		fail_invoke()
+		return
 	var/mob/living/cultist_to_summon = tgui_input_list(user, "Who do you wish to call to [src]?", "Followers of the Geometer", cultists)
 	if(!Adjacent(user) || !src || QDELETED(src) || user.incapacitated())
 		return
-	if(!cultist_to_summon)
+	if(isnull(cultist_to_summon))
 		to_chat(user, "<span class='cult italic'>You require a summoning target!</span>")
 		fail_invoke()
 		log_game("Summon Cultist rune failed - no target")
@@ -828,7 +839,7 @@ structure_check() searches for nearby cultist structures required for the invoca
 		for(var/mob/dead/observer/O in T)
 			if(O.client && !is_banned_from(O.ckey, ROLE_CULTIST) && !QDELETED(src) && !(isAdminObserver(O) && (O.client.prefs.toggles & ADMIN_IGNORE_CULT_GHOST)) && !QDELETED(O))
 				ghosts_on_rune += O
-		if(!ghosts_on_rune.len)
+		if(!length(ghosts_on_rune))
 			to_chat(user, span_cultitalic("There are no spirits near [src]!"))
 			fail_invoke()
 			log_game("Manifest rune failed - no nearby ghosts")
@@ -926,7 +937,7 @@ structure_check() searches for nearby cultist structures required for the invoca
 	var/mob/living/user = invokers[1]
 	var/datum/antagonist/cult/user_antag = user.mind.has_antag_datum(/datum/antagonist/cult,TRUE)
 	var/datum/objective/eldergod/summon_objective = locate() in user_antag.cult_team.objectives
-	if(summon_objective.summon_spots.len <= 1)
+	if(length(summon_objective.summon_spots) <= 1)
 		to_chat(user, span_cultlarge("Only one ritual site remains - it must be reserved for the final summoning!"))
 		return
 	if(!(place in summon_objective.summon_spots))
@@ -940,7 +951,7 @@ structure_check() searches for nearby cultist structures required for the invoca
 	for(var/mob/living/M in GLOB.player_list)
 		if(IS_CULTIST(M))
 			intensity++
-	intensity = max(60, 360 - (360*(intensity/GLOB.player_list.len + 0.3)**2)) //significantly lower intensity for "winning" cults
+	intensity = max(60, 360 - (360*(intensity/length(GLOB.player_list) + 0.3)**2)) //significantly lower intensity for "winning" cults
 	var/duration = intensity*10
 	playsound(T, 'sound/magic/enter_blood.ogg', 100, TRUE)
 	visible_message(span_warning("A colossal shockwave of energy bursts from the rune, disintegrating it in the process!"))

code/modules/antagonists/eldritch_cult/eldritch_items.dm

@@ -338,7 +338,7 @@
 		if(!rune_ref.resolve())
 			current_runes -= rune_ref
 
-	if(current_runes.len >= max_rune_amt)
+	if(length(current_runes) >= max_rune_amt)
 		to_chat(user,span_notice("The blade cannot support more runes!"))
 		return
 
@@ -350,7 +350,7 @@
 	drawing = TRUE
 
 	var/type = pick_list[tgui_input_list(user, "Choose the rune", "Rune", pick_list) ]
-	if(!type)
+	if(isnull(type))
 		drawing = FALSE
 		return
 

code/modules/antagonists/eldritch_cult/eldritch_knowledge.dm

@@ -147,7 +147,7 @@
 	for(var/atom/requirements as anything in atoms)
 		fingerprints |= requirements.return_fingerprints()
 	list_clear_nulls(fingerprints)
-	if(fingerprints.len == 0)
+	if(!length(fingerprints))
 		return FALSE
 	return TRUE
 
@@ -160,12 +160,12 @@
 			compiled_list |= human_to_check.real_name
 			compiled_list[human_to_check.real_name] = human_to_check
 
-	if(compiled_list.len == 0)
+	if(!length(compiled_list))
 		to_chat(user, span_warning("These items don't possess the required fingerprints or DNA."))
 		return FALSE
 
-	var/chosen_mob = tgui_input_list(user, "Select the person you wish to curse","Your target", sort_list(compiled_list, /proc/cmp_mob_realname_dsc))
-	if(!chosen_mob)
+	var/chosen_mob = tgui_input_list(user, "Select the person you wish to curse", "Eldritch Curse", sort_list(compiled_list, /proc/cmp_mob_realname_dsc))
+	if(isnull(chosen_mob))
 		return FALSE
 	curse(compiled_list[chosen_mob])
 	addtimer(CALLBACK(src, .proc/uncurse, compiled_list[chosen_mob]),timer)
@@ -292,7 +292,12 @@
 				if(!targeted)
 					break
 				targets["[targeted.current.real_name] the [targeted.assigned_role.title][is_teammate ? " (ally)" : ""]"] = targeted.current
-			heart.target = targets[input(user,"Choose your next target","Target") in targets]
+			var/chosen_target = tgui_input_list(user, "Choose a target", "Eldritch Targeting", targets)
+			if(isnull(chosen_target))
+				return FALSE
+			if(isnull(targets[chosen_target]))
+				return FALSE
+			heart.target = targets[chosen_target]
 			qdel(temp_objective)
 			if(heart.target)
 				to_chat(user,span_warning("Your new target has been selected, go and sacrifice [heart.target.real_name]!"))

code/modules/antagonists/eldritch_cult/eldritch_magic.dm

@@ -586,7 +586,9 @@
 	if(!originator?.linked_mobs[living_owner])
 		CRASH("Uh oh the mansus link got somehow activated without it being linked to a raw prophet or the mob not being in a list of mobs that should be able to do it.")
 
-	var/message = sanitize(input("Message:", "Telepathy from the Manse") as text|null)
+	var/message = sanitize(tgui_input_text(living_owner, "Enter your message", "Telepathy from the Manse"))
+	if(!message)
+		return
 
 	if(QDELETED(living_owner))
 		return
@@ -595,7 +597,7 @@
 		to_chat(living_owner, span_warning("The link seems to have been severed..."))
 		Remove(living_owner)
 		return
-	if(message)
+
 	var/msg = "<i><font color=#568b00>\[Mansus Link\] <b>[living_owner]:</b> [message]</font></i>"
 	log_directed_talk(living_owner, originator, msg, LOG_SAY, "Mansus Link")
 	to_chat(originator.linked_mobs, msg)

code/modules/antagonists/eldritch_cult/eldritch_structures.dm

@@ -81,7 +81,12 @@
 	for(var/X in subtypesof(/obj/item/eldritch_potion))
 		var/obj/item/eldritch_potion/potion = X
 		lst[initial(potion.name)] = potion
-	var/type = lst[input(user,"Choose your brew","Brew") in lst]
+	var/chosen_type = tgui_input_list(user, "Choose a brew", "Brewing", lst)
+	if(isnull(chosen_type))
+		return
+	if(isnull(lst[chosen_type]))
+		return
+	var/type = lst[chosen_type]
 	playsound(src, 'sound/misc/desecration-02.ogg', 75, TRUE)
 	new type(drop_location())
 	current_mass = 0

code/modules/art/paintings.dm

@@ -180,11 +180,10 @@
 		to_chat(user,span_notice("You can't afford this."))
 		return
 	var/sniped_amount = painting_metadata.credit_value
-	var/offer_amount = input(user,"How much do you want to offer ? Minimum : [painting_metadata.credit_value]","Patronage Amount", painting_metadata.credit_value + 1) as num|null
-	if(account.account_balance < offer_amount)
-		to_chat(user,span_notice("You can't afford this."))
+	var/offer_amount = tgui_input_number(user, "How much do you want to offer?", "Patronage Amount", (painting_metadata.credit_value + 1), account.account_balance, painting_metadata.credit_value)
+	if(isnull(offer_amount))
 		return
-	if(!offer_amount || sniped_amount != painting_metadata.credit_value || offer_amount < painting_metadata.credit_value+1 || !user.canUseTopic(src))
+	if(offer_amount <= 0 || sniped_amount != painting_metadata.credit_value || offer_amount < painting_metadata.credit_value+1 || !user.canUseTopic(src))
 		return
 	if(!account.adjust_money(-offer_amount))
 		to_chat(user,span_warning("Transaction failure. Please try again."))

code/modules/assembly/doorcontrol.dm

@@ -14,9 +14,10 @@
 		. += span_notice("Its channel ID is '[id]'.")
 
 /obj/item/assembly/control/multitool_act(mob/living/user)
-	var/change_id = input("Set the shutters/blast door/blast door controllers ID. It must be a number between 1 and 100.", "ID", id) as num|null
-	if(change_id)
-		id = clamp(round(change_id, 1), 1, 100)
+	var/change_id = tgui_input_number(user, "Set the door controllers ID", "ID", id, 100, 1)
+	if(isnull(change_id))
+		return
+	id = round(change_id)
 	to_chat(user, span_notice("You change the ID to [id]."))
 
 /obj/item/assembly/control/activate()

code/modules/atmospherics/machinery/portable/canister.dm

@@ -620,8 +620,10 @@ GLOBAL_LIST_INIT(gas_id_to_canister, init_gas_id_to_canister())
 		return
 	switch(action)
 		if("relabel")
-			var/label = tgui_input_list(usr, "New canister label", name, GLOB.gas_id_to_canister)
-			if(label && !..())
+			var/label = tgui_input_list(usr, "New canister label", "Canister", GLOB.gas_id_to_canister)
+			if(isnull(label))
+				return
+			if(!..())
 				var/newtype = GLOB.gas_id_to_canister[label]
 				if(newtype)
 					var/obj/machinery/portable_atmospherics/canister/replacement = newtype
@@ -684,7 +686,7 @@ GLOBAL_LIST_INIT(gas_id_to_canister, init_gas_id_to_canister())
 						logmsg += "\n[name]: [gaseslog[name]] moles."
 						if(n <= 5) //the first five gases added
 							admin_msg += "\n[name]: [gaseslog[name]] moles."
-						if(n == 5 && gaseslog.len > 5) //message added if more than 5 gases
+						if(n == 5 && length(gaseslog) > 5) //message added if more than 5 gases
 							admin_msg += "\nToo many gases to log. Check investigate log."
 					if(danger) //sent to admin's chat if contains dangerous gases
 						message_admins(admin_msg)

code/modules/awaymissions/bluespaceartillery.dm

@@ -37,9 +37,12 @@
 /obj/machinery/artillerycontrol/Topic(href, href_list)
 	if(..())
 		return
-	var/A
-	A = input("Area to bombard", "Open Fire", A) in GLOB.teleportlocs
-	var/area/thearea = GLOB.teleportlocs[A]
+	var/target_area = tgui_input_list(usr, "Area to bombard", "Open Fire", GLOB.teleportlocs)
+	if(isnull(target_area))
+		return
+	if(isnull(GLOB.teleportlocs[target_area]))
+		return
+	var/area/thearea = GLOB.teleportlocs[target_area]
 	if(usr.stat != CONSCIOUS || HAS_TRAIT(usr, TRAIT_HANDS_BLOCKED))
 		return
 	if(reload < reload_cooldown)
@@ -47,9 +50,9 @@
 	if(usr.contents.Find(src) || (in_range(src, usr) && isturf(loc)) || issilicon(usr))
 		priority_announce("Bluespace artillery fire detected. Brace for impact.")
 		message_admins("[ADMIN_LOOKUPFLW(usr)] has launched an artillery strike.")
-		var/list/L = list()
-		for(var/turf/T in get_area_turfs(thearea.type))
-			L+=T
-		var/loc = pick(L)
-		explosion(loc, explosiondev, explosionmed, explosionlight, explosion_cause = src)
+		var/list/possible_turfs = list()
+		for(var/turf/available_turf in get_area_turfs(thearea.type))
+			possible_turfs += available_turf
+		var/random_turf = pick(possible_turfs)
+		explosion(random_turf, explosiondev, explosionmed, explosionlight, explosion_cause = src)
 		reload = 0

code/modules/cargo/blackmarket/blackmarket_uplink.dm

@@ -45,14 +45,12 @@
 	if(!isliving(user) || !user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 		return
 
-	var/amount_to_remove = FLOOR(input(user, "How much do you want to withdraw? Current Amount: [money]", "Withdraw Funds", 5) as num|null, 1)
+	var/amount_to_remove = tgui_input_number(user, "How much do you want to withdraw? Current Amount: [money]", "Withdraw Funds", 5, money, 1)
+	if(isnull(amount_to_remove))
+		return
 	if(!user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 		return
-
-	if(!amount_to_remove || amount_to_remove < 0)
-		return
-	if(amount_to_remove > money)
-		to_chat(user, span_warning("There is only [money] credits in [src]"))
+	if(amount_to_remove <= 0)
 		return
 
 	var/obj/item/holochip/holochip = new (user.drop_location(), amount_to_remove)

code/modules/cargo/centcom_podlauncher.dm

@@ -285,7 +285,7 @@
 				return
 			var/list/expNames = list("Devastation", "Heavy Damage", "Light Damage", "Flame") //Explosions have a range of different types of damage
 			var/list/boomInput = list()
-			for (var/i=1 to expNames.len) //Gather input from the user for the value of each type of damage
+			for (var/i=1 to length(expNames)) //Gather input from the user for the value of each type of damage
 				boomInput.Add(input("Enter the [expNames[i]] range of the explosion. WARNING: This ignores the bomb cap!", "[expNames[i]] Range",  0) as null|num)
 				if (isnull(boomInput[i]))
 					return
@@ -456,7 +456,7 @@
 					continue
 				var/sound/found = playing_sound
 				if (found.file == tempSound.file)
-					soundLen = found.len
+					soundLen = length(found)
 			if (!soundLen)
 				soundLen = input(holder, "Couldn't auto-determine sound file length. What is the exact length of the sound file, in seconds. This number will be used to line the sound up so that it finishes right as the pod lands!", "Pick a Sound File", 0.3) as null|num
 				if (isnull(soundLen))
@@ -689,7 +689,7 @@
 	acceptableTurfs = list()
 	for (var/t in orderedArea) //Go through the orderedArea list
 		var/turf/unchecked_turf = t
-		if (iswallturf(unchecked_turf) || typecache_filter_list_reverse(unchecked_turf.contents, ignored_atoms).len != 0) //if there is something in this turf that isn't in the blacklist, we consider this turf "acceptable" and add it to the acceptableTurfs list
+		if (iswallturf(unchecked_turf) || length(typecache_filter_list_reverse(unchecked_turf.contents, ignored_atoms))) //if there is something in this turf that isn't in the blacklist, we consider this turf "acceptable" and add it to the acceptableTurfs list
 			acceptableTurfs.Add(unchecked_turf) //Because orderedArea was an ordered linear list, acceptableTurfs will be as well.
 			numTurfs ++
 
@@ -703,7 +703,7 @@
 					if (iswallturf(accepted_turf))
 						launchList += accepted_turf
 			if(LAUNCH_ORDERED) //If we are launching one at a time
-				if (launchCounter > acceptableTurfs.len) //Check if the launchCounter, which acts as an index, is too high. If it is, reset it to 1
+				if (launchCounter > length(acceptableTurfs)) //Check if the launchCounter, which acts as an index, is too high. If it is, reset it to 1
 					launchCounter = 1 //Note that the launchCounter index is incremented in the launch() proc
 				var/turf/next_turf_in_line = acceptableTurfs[launchCounter]
 				launchList |= typecache_filter_list_reverse(next_turf_in_line.contents, ignored_atoms) //Filter the specicic turf chosen from acceptableTurfs, and add it to the launchList
@@ -774,7 +774,7 @@
 /datum/centcom_podlauncher/proc/updateSelector() //Ensures that the selector effect will showcase the next item if needed
 	if (launchChoice == LAUNCH_ORDERED && length(acceptableTurfs) > 1 && !temp_pod.reversing && !temp_pod.effectMissile) //We only show the selector if we are taking items from the bay
 		var/index = (launchCounter == 1 ? launchCounter : launchCounter + 1) //launchCounter acts as an index to the ordered acceptableTurfs list, so adding one will show the next item in the list. We don't want to do this for the very first item tho
-		if (index > acceptableTurfs.len) //out of bounds check
+		if (index > length(acceptableTurfs)) //out of bounds check
 			index = 1
 		selector.forceMove(acceptableTurfs[index]) //forceMove the selector to the next turf in the ordered acceptableTurfs list
 	else

code/modules/client/verbs/ooc.dm

@@ -256,7 +256,7 @@ GLOBAL_VAR_INIT(normal_ooc_colour, "#002eb8")
 			players[displayed_key] = displayed_key
 
 	// Check if the list is empty
-	if(!players.len)
+	if(!length(players))
 		// Express that there are no players we can ignore in chat
 		to_chat(src, "<span class='infoplain'>There are no other players you can ignore!</span>")
 
@@ -267,10 +267,10 @@ GLOBAL_VAR_INIT(normal_ooc_colour, "#002eb8")
 	players = sort_list(players)
 
 	// Request the player to ignore
-	var/selection = input("Please, select a player!", "Ignore", null, null) as null|anything in players
+	var/selection = tgui_input_list(src, "Select a player", "Ignore", players)
 
 	// Stop running if we didn't receieve a valid selection
-	if(!selection || !(selection in players))
+	if(isnull(selection) || !(selection in players))
 		return
 
 	// Store the selected player
@@ -300,7 +300,7 @@ GLOBAL_VAR_INIT(normal_ooc_colour, "#002eb8")
 	set desc = "Stop ignoring a player's messages on the OOC channel"
 
 	// Check if we've ignored any players
-	if(!prefs.ignoring.len)
+	if(!length(prefs.ignoring))
 		// Express that we haven't ignored any players in chat
 		to_chat(src, "<span class='infoplain'>You haven't ignored any players!</span>")
 
@@ -308,10 +308,10 @@ GLOBAL_VAR_INIT(normal_ooc_colour, "#002eb8")
 		return
 
 	// Request the player to unignore
-	var/selection = input("Please, select a player!", "Unignore", null, null) as null|anything in prefs.ignoring
+	var/selection = tgui_input_list(src, "Select a player", "Unignore", prefs.ignoring)
 
 	// Stop running if we didn't receive a selection
-	if(!selection)
+	if(isnull(selection))
 		return
 
 	// Check if the selected player is not on our ignore list

code/modules/clothing/chameleon.dm

@@ -93,12 +93,14 @@
 /datum/action/chameleon_outfit/proc/select_outfit(mob/user)
 	if(!user || !IsAvailable())
 		return FALSE
-	var/selected = input("Select outfit to change into", "Chameleon Outfit") as null|anything in outfit_options
+	var/selected = tgui_input_list(user, "Select outfit to change into", "Chameleon Outfit", outfit_options)
+	if(isnull(selected))
+		return FALSE
 	if(!IsAvailable() || QDELETED(src) || QDELETED(user))
 		return FALSE
-	var/outfit_type = outfit_options[selected]
-	if(!outfit_type)
+	if(isnull(outfit_options[selected]))
 		return FALSE
+	var/outfit_type = outfit_options[selected]
 	var/datum/outfit/job/O = new outfit_type()
 	var/list/outfit_types = O.get_chameleon_disguise_info()
 	var/datum/job/job_datum = SSjob.GetJobType(O.jobtype)
@@ -177,13 +179,12 @@
 
 /datum/action/item_action/chameleon/change/proc/select_look(mob/user)
 	var/obj/item/picked_item
-	var/picked_name
-	picked_name = input("Select [chameleon_name] to change into", "Chameleon [chameleon_name]", picked_name) as null|anything in sort_list(chameleon_list, /proc/cmp_typepaths_asc)
-	if(!picked_name)
+	var/picked_name = tgui_input_list(user, "Select [chameleon_name] to change into", "Chameleon Settings", sort_list(chameleon_list, /proc/cmp_typepaths_asc))
+	if(isnull(picked_name))
+		return
+	if(isnull(chameleon_list[picked_name]))
 		return
 	picked_item = chameleon_list[picked_name]
-	if(!picked_item)
-		return
 	update_look(user, picked_item)
 
 /datum/action/item_action/chameleon/change/proc/random_look(mob/user)

code/modules/clothing/head/wig.dm

@@ -47,7 +47,7 @@
 	hair_overlay.overlays += emissive_blocker(hair_overlay.icon, hair_overlay.icon_state, alpha = hair_overlay.alpha)
 
 /obj/item/clothing/head/wig/attack_self(mob/user)
-	var/new_style = input(user, "Select a hairstyle", "Wig Styling")  as null|anything in (GLOB.hairstyles_list - "Bald")
+	var/new_style = tgui_input_list(user, "Select a hairstyle", "Wig Styling", GLOB.hairstyles_list - "Bald")
 	var/newcolor = adjustablecolor ? input(usr,"","Choose Color",color) as color|null : null
 	if(!user.canUseTopic(src, BE_CLOSE))
 		return

code/modules/clothing/under/_under.dm

@@ -251,7 +251,9 @@
 		return
 
 	var/list/modes = list("Off", "Binary vitals", "Exact vitals", "Tracking beacon")
-	var/switchMode = input("Select a sensor mode:", "Suit Sensor Mode", modes[sensor_mode + 1]) in modes
+	var/switchMode = tgui_input_list(M, "Select a sensor mode", "Suit Sensors", modes, modes[sensor_mode + 1])
+	if(isnull(switchMode))
+		return
 	if(get_dist(usr, src) > 1)
 		to_chat(usr, span_warning("You have moved too far away!"))
 		return

code/modules/economy/pay_stand.dm

@@ -27,10 +27,10 @@
 				name = rename_msg
 				return
 			else if(choice == "Set the fee")
-				var/force_fee_input = input(user,"Set the fee!","Set a fee!",0) as num|null
+				var/force_fee_input = tgui_input_number(user, "Set the fee", "Fee", max_value = 10000)
 				if(isnull(force_fee_input) || !user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
 					return
-				force_fee = force_fee_input
+				force_fee = round(force_fee_input)
 				return
 			locked = !locked
 			to_chat(user, span_notice("You [src.locked ? "lock" : "unlock"] the paystand, protecting the bolts from [anchored ? "loosening" : "tightening"]."))

code/modules/food_and_drinks/pizzabox.dm

@@ -150,12 +150,12 @@
 				update_appearance()
 				return
 			else
-				bomb_timer = input(user, "Set the [bomb] timer from [bomb_timer_min] to [bomb_timer_max].", bomb, bomb_timer) as num|null
+				bomb_timer = tgui_input_number(user, "Set the timer for [bomb].", "Pizza Bomb", bomb_timer, bomb_timer_max, bomb_timer_min)
 
 				if (isnull(bomb_timer))
 					return
 
-				bomb_timer = clamp(CEILING(bomb_timer, 1), bomb_timer_min, bomb_timer_max)
+				bomb_timer = round(bomb_timer)
 				bomb_defused = FALSE
 
 				log_bomber(user, "has trapped a", src, "with [bomb] set to [bomb_timer] seconds")

code/modules/hydroponics/hydroponics.dm

@@ -737,8 +737,8 @@
 			if(!(gene.mutability_flags & PLANT_GENE_REMOVABLE))
 				continue // Don't show genes that can't be removed.
 			current_traits[gene.name] = gene
-		var/removed_trait = (input(user, "Select a trait to remove from the [myseed.plantname].", "Plant Trait Removal") as null|anything in sort_list(current_traits))
-		if(removed_trait == null)
+		var/removed_trait = tgui_input_list(user, "Trait to remove from the [myseed.plantname]", "Plant Trait Removal", sort_list(current_traits))
+		if(isnull(removed_trait))
 			return
 		if(!user.canUseTopic(src, BE_CLOSE))
 			return
@@ -818,8 +818,12 @@
 			for(var/muties in myseed.mutatelist)
 				var/obj/item/seeds/another_mut = new muties
 				fresh_mut_list[another_mut.plantname] = muties
-			var/locked_mutation = (input(user, "Select a mutation to lock.", "Plant Mutation Locks") as null|anything in sort_list(fresh_mut_list))
-			if(!user.canUseTopic(src, BE_CLOSE) || !locked_mutation)
+			var/locked_mutation = tgui_input_list(user, "Mutation to lock", "Plant Mutation Locks", sort_list(fresh_mut_list))
+			if(isnull(locked_mutation))
+				return
+			if(isnull(fresh_mut_list[locked_mutation]))
+				return
+			if(!user.canUseTopic(src, BE_CLOSE))
 				return
 			myseed.mutatelist = list(fresh_mut_list[locked_mutation])
 			myseed.set_endurance(myseed.endurance/2)

code/modules/instruments/songs/editor.dm

@@ -135,8 +135,8 @@
 				return
 
 			if(length_char(t) >= MUSIC_MAXLINES * MUSIC_MAXLINECHARS)
-				var/cont = input(usr, "Your message is too long! Would you like to continue editing it?", "", "yes") in list("yes", "no")
-				if(cont == "no")
+				var/cont = tgui_alert(usr, "Your message is too long! Would you like to continue editing it?", "Warning", list("Yes", "No"))
+				if(cont != "Yes")
 					break
 		while(length_char(t) > MUSIC_MAXLINES * MUSIC_MAXLINECHARS)
 		ParseSong(t)
@@ -157,7 +157,7 @@
 		INVOKE_ASYNC(src, .proc/start_playing, usr)
 
 	else if(href_list["newline"])
-		var/newline = html_encode(input("Enter your line: ", parent.name) as text|null)
+		var/newline = tgui_input_text(usr, "Enter your line ", parent.name)
 		if(!newline || !in_range(parent, usr))
 			return
 		if(lines.len > MUSIC_MAXLINES)
@@ -174,7 +174,7 @@
 
 	else if(href_list["modifyline"])
 		var/num = round(text2num(href_list["modifyline"]),1)
-		var/content = stripped_input(usr, "Enter your line: ", parent.name, lines[num], MUSIC_MAXLINECHARS)
+		var/content = tgui_input_text(usr, "Enter your line ", parent.name, lines[num], MUSIC_MAXLINECHARS)
 		if(!content || !in_range(parent, usr))
 			return
 		if(num > lines.len || num < 1)
@@ -185,22 +185,22 @@
 		stop_playing()
 
 	else if(href_list["setlinearfalloff"])
-		var/amount = input(usr, "Set linear sustain duration in seconds", "Linear Sustain Duration") as null|num
+		var/amount = tgui_input_number(usr, "Set linear sustain duration in seconds", "Linear Sustain Duration")
 		if(!isnull(amount))
 			set_linear_falloff_duration(amount)
 
 	else if(href_list["setexpfalloff"])
-		var/amount = input(usr, "Set exponential sustain factor", "Exponential sustain factor") as null|num
+		var/amount = tgui_input_number(usr, "Set exponential sustain factor", "Exponential sustain factor")
 		if(!isnull(amount))
 			set_exponential_drop_rate(amount)
 
 	else if(href_list["setvolume"])
-		var/amount = input(usr, "Set volume", "Volume") as null|num
+		var/amount = tgui_input_number(usr, "Set volume", "Volume")
 		if(!isnull(amount))
 			set_volume(amount)
 
 	else if(href_list["setdropoffvolume"])
-		var/amount = input(usr, "Set dropoff threshold", "Dropoff Threshold Volume") as null|num
+		var/amount = tgui_input_number(usr, "Set dropoff threshold", "Dropoff Threshold Volume")
 		if(!isnull(amount))
 			set_dropoff_volume(amount)
 
@@ -215,12 +215,14 @@
 			var/datum/instrument/I = SSinstruments.get_instrument(i)
 			if(I)
 				LAZYSET(categories[I.category || "ERROR CATEGORY"], I.name, I.id)
-		var/cat = input(usr, "Select Category", "Instrument Category") as null|anything in categories
-		if(!cat)
+		var/cat = tgui_input_list(usr, "Select Category", "Instrument Category", categories)
+		if(isnull(cat))
 			return
 		var/list/instruments = categories[cat]
-		var/choice = input(usr, "Select Instrument", "Instrument Selection") as null|anything in instruments
-		if(!choice)
+		var/choice = tgui_input_list(usr, "Select Instrument", "Instrument Selection", instruments)
+		if(isnull(choice))
+			return
+		if(isnull(instruments[choice]))
 			return
 		choice = instruments[choice] //get id
 		if(choice)
@@ -232,7 +234,7 @@
 			note_shift = clamp(amount, note_shift_min, note_shift_max)
 
 	else if(href_list["setsustainmode"])
-		var/choice = input(usr, "Choose a sustain mode", "Sustain Mode") as null|anything in SSinstruments.note_sustain_modes
+		var/choice = tgui_input_list(usr, "Choose a sustain mode", "Sustain Mode", SSinstruments.note_sustain_modes)
 		if(choice)
 			sustain_mode = SSinstruments.note_sustain_modes[choice]
 

code/modules/language/language_menu.dm

@@ -85,7 +85,9 @@
 		if("grant_language")
 			if((is_admin || isobserver(AM)) && language_datum)
 				var/list/choices = list("Only Spoken", "Only Understood", "Both")
-				var/choice = input(user,"How do you want to add this language?","[language_datum]",null) as null|anything in choices
+				var/choice = tgui_input_list(user, "How do you want to add this language?", "[language_datum]", choices)
+				if(isnull(choice))
+					return
 				var/spoken = FALSE
 				var/understood = FALSE
 				switch(choice)
@@ -108,7 +110,9 @@
 		if("remove_language")
 			if((is_admin || isobserver(AM)) && language_datum)
 				var/list/choices = list("Only Spoken", "Only Understood", "Both")
-				var/choice = input(user,"Which part do you wish to remove?","[language_datum]",null) as null|anything in choices
+				var/choice = tgui_input_list(user, "Which part do you wish to remove?", "[language_datum]", choices)
+				if(isnull(choice))
+					return
 				var/spoken = FALSE
 				var/understood = FALSE
 				switch(choice)

code/modules/library/lib_items.dm

@@ -113,7 +113,7 @@
 				if(!user.is_literate())
 					to_chat(user, span_notice("You scribble illegibly on the side of [src]!"))
 					return
-				var/newname = stripped_input(user, "What would you like to title this bookshelf?")
+				var/newname = tgui_input_text(user, "What would you like to title this bookshelf?", "Bookshelf Renaming", max_length = MAX_NAME_LEN)
 				if(!user.canUseTopic(src, BE_CLOSE))
 					return
 				if(!newname)
@@ -121,7 +121,7 @@
 				else
 					name = "bookcase ([sanitize(newname)])"
 			else if(I.tool_behaviour == TOOL_CROWBAR)
-				if(contents.len)
+				if(length(contents))
 					to_chat(user, span_warning("You need to remove the books first!"))
 				else
 					I.play_tool_sound(src, 100)
@@ -142,9 +142,11 @@
 	if(load_random_books)
 		create_random_books(books_to_load, src, FALSE, random_category)
 		load_random_books = FALSE
-	if(contents.len)
-		var/obj/item/book/choice = input(user, "Which book would you like to remove from the shelf?") as null|obj in sort_names(contents.Copy())
-		if(choice)
+	if(!length(contents))
+		return
+	var/obj/item/book/choice = tgui_input_list(user, "Book to remove from the shelf", "Remove Book", sort_names(contents.Copy()))
+	if(isnull(choice))
+		return
 	if(!(user.mobility_flags & MOBILITY_USE) || user.stat != CONSCIOUS || HAS_TRAIT(user, TRAIT_HANDS_BLOCKED) || !in_range(loc, user))
 		return
 	if(ishuman(user))
@@ -169,7 +171,7 @@
 	if(state == BOOKCASE_UNANCHORED || state == BOOKCASE_ANCHORED)
 		icon_state = "bookempty"
 		return ..()
-	var/amount = contents.len
+	var/amount = length(contents)
 	if(load_random_books)
 		amount += books_to_load
 	icon_state = "book-[clamp(amount, 0, 5)]"
@@ -249,12 +251,14 @@
 		if(!literate)
 			to_chat(user, span_notice("You scribble illegibly on the cover of [src]!"))
 			return
-		var/choice = tgui_input_list(usr, "What would you like to change?",,list("Title", "Contents", "Author", "Cancel"))
+		var/choice = tgui_input_list(usr, "What would you like to change?", "Book Alteration", list("Title", "Contents", "Author", "Cancel"))
+		if(isnull(choice))
+			return
 		if(!user.canUseTopic(src, BE_CLOSE, literate))
 			return
 		switch(choice)
 			if("Title")
-				var/newtitle = reject_bad_text(stripped_input(user, "Write a new title:"))
+				var/newtitle = reject_bad_text(tgui_input_text(user, "Write a new title", "Book Title", max_length = 30))
 				if(!user.canUseTopic(src, BE_CLOSE, literate))
 					return
 				if (length_char(newtitle) > 30)
@@ -267,7 +271,7 @@
 					name = newtitle
 					title = newtitle
 			if("Contents")
-				var/content = stripped_input(user, "Write your book's contents (HTML NOT allowed):","","",8192)
+				var/content = tgui_input_text(user, "Write your book's contents (HTML NOT allowed)", "Book Contents", max_length = 8192, multiline = TRUE)
 				if(!user.canUseTopic(src, BE_CLOSE, literate))
 					return
 				if(!content)
@@ -276,7 +280,7 @@
 				else
 					dat += content
 			if("Author")
-				var/newauthor = stripped_input(user, "Write the author's name:")
+				var/newauthor = tgui_input_text(user, "Write the author's name", "Author Name", max_length = MAX_NAME_LEN)
 				if(!user.canUseTopic(src, BE_CLOSE, literate))
 					return
 				if(!newauthor)