Merge pull request #12969 from silicons/e

someone asked i code holoparasites playing music so here we are???

code/modules/instruments/songs/_song.dm

@@ -303,3 +303,19 @@
 		return TRUE
 	var/obj/structure/musician/M = parent
 	return M.should_stop_playing(user)
+
+/datum/song/holoparasite
+	var/mob/living/simple_animal/hostile/guardian/stand
+
+/datum/song/holoparasite/New(atom/parent, list/instrument_ids)
+	. = ..()
+	stand = istype(parent, /mob/living/simple_animal/hostile/guardian) && parent
+
+/datum/song/holoparasite/updateDialog()
+	stand.ui_interact(src)
+
+/datum/song/holoparasite/should_stop_playing(mob/user)
+	return FALSE
+
+/datum/song/holoparasite/check_can_use(mob/user)
+	return (user == stand)

code/modules/instruments/songs/editor.dm

@@ -109,8 +109,11 @@
 				linenum++
 		updateDialog(usr)		// make sure updates when complete
 
+/datum/song/proc/check_can_use(mob/user)
+	return user.canUseTopic(parent, TRUE, FALSE, FALSE, FALSE)
+
 /datum/song/Topic(href, href_list)
-	if(!usr.canUseTopic(parent, TRUE, FALSE, FALSE, FALSE))
+	if(!check_can_use(usr))
 		usr << browse(null, "window=instrument")
 		usr.unset_machine()
 		return

code/modules/mob/living/simple_animal/guardian/guardian.dm

@@ -60,11 +60,13 @@ GLOBAL_LIST_EMPTY(parasites) //all currently existing/living guardians
 	var/magic_fluff_string = "<span class='holoparasite'>You draw the Coder, symbolizing bugs and errors. This shouldn't happen! Submit a bug report!</span>"
 	var/tech_fluff_string = "<span class='holoparasite'>BOOT SEQUENCE COMPLETE. ERROR MODULE LOADED. THIS SHOULDN'T HAPPEN. Submit a bug report!</span>"
 	var/carp_fluff_string = "<span class='holoparasite'>CARP CARP CARP SOME SORT OF HORRIFIC BUG BLAME THE CODERS CARP CARP CARP</span>"
+	/// sigh, fine.
+	var/datum/song/holoparasite/music_datum
 
 /mob/living/simple_animal/hostile/guardian/Initialize(mapload, theme)
 	GLOB.parasites += src
 	updatetheme(theme)
-
+	music_datum = new(src, get_allowed_instrument_ids())
 	. = ..()
 
 /mob/living/simple_animal/hostile/guardian/med_hud_set_health()
@@ -84,8 +86,16 @@ GLOBAL_LIST_EMPTY(parasites) //all currently existing/living guardians
 
 /mob/living/simple_animal/hostile/guardian/Destroy()
 	GLOB.parasites -= src
+	QDEL_NULL(music_datum)
 	return ..()
 
+/mob/living/simple_animal/hostile/guardian/verb/music_interact()
+	set name = "Access Internal Synthesizer"
+	set desc = "Access your internal musical synthesizer"
+	set category = "IC"
+
+	music_datum.ui_interact(src)
+
 /mob/living/simple_animal/hostile/guardian/proc/updatetheme(theme) //update the guardian's theme
 	if(!theme)
 		theme = pick("magic", "tech", "carp")