Mech fabricators can now store bluespace mesh (#25927)

* Allows bluespace polycrystal in the mech fabricator

Fixes #24591

* Titanium and polycrystal sheet insert

* You can now also insert single crystals

* Check if the fabricator is not slated for deletion before removing the overlay

code/game/mecha/mech_fabricator.dm

@@ -37,7 +37,7 @@
 /obj/machinery/mecha_part_fabricator/New()
 	..()
 	files = new /datum/research(src) //Setup the research data holder.
-	materials = new(src, list(MAT_METAL, MAT_GLASS, MAT_SILVER, MAT_GOLD, MAT_DIAMOND, MAT_PLASMA, MAT_URANIUM, MAT_BANANIUM, MAT_TITANIUM))
+	materials = new(src, list(MAT_METAL, MAT_GLASS, MAT_SILVER, MAT_GOLD, MAT_DIAMOND, MAT_PLASMA, MAT_URANIUM, MAT_BANANIUM, MAT_TITANIUM, MAT_BLUESPACE))
 	var/obj/item/weapon/circuitboard/machine/B = new /obj/item/weapon/circuitboard/machine/mechfab(null)
 	B.apply_default_parts(src)
 
@@ -430,22 +430,13 @@
 		return 1
 
 	if(istype(W, /obj/item/stack/sheet))
-		if(panel_open)
-			to_chat(user, "<span class='warning'>You can't load [src] while it's opened!</span>")
-			return 1
-		if(being_built)
-			to_chat(user, "<span class='warning'>\The [src] is currently processing! Please wait until completion.</span>")
+
+		if(!is_insertion_ready(user))
 			return 1
 
 		var/material_amount = materials.get_item_material_amount(W)
-		if(!material_amount)
-			to_chat(user, "<span class='warning'>This object does not contain sufficient amounts of materials to be accepted by [src].</span>")
-			return 1
-		if(!materials.has_space(material_amount))
-			to_chat(user, "<span class='warning'>\The [src] is full. Please remove some materials from [src] in order to insert more.</span>")
-			return 1
-		if(!user.temporarilyRemoveItemFromInventory(W))
-			to_chat(user, "<span class='warning'>\The [W] is stuck to you and cannot be placed into [src].</span>")
+
+		if(!try_insert(user, W, material_amount))
 			return 1
 
 		var/inserted = materials.insert_item(W)
@@ -457,7 +448,31 @@
 				var/mat_overlay = "fab-load-[material2name(W.materials[1])]"
 				add_overlay(mat_overlay)
 				sleep(10)
-				cut_overlay(mat_overlay) //No matter what the overlay shall still be deleted
+				if(!QDELETED(src))
+					cut_overlay(mat_overlay) //No matter what the overlay shall still be deleted
+
+		updateUsrDialog()
+
+	else if(istype(W, /obj/item/weapon/ore/bluespace_crystal))
+
+		if(!is_insertion_ready(user))
+			return 1
+
+		var/material_amount = materials.get_item_material_amount(W)
+
+		if(!try_insert(user, W, material_amount))
+			return 1
+
+		var/inserted = materials.insert_item(W)
+		if(inserted)
+			to_chat(user, "<span class='notice'>You add [W] to the [src].</span>")
+			if(W && W.materials.len)
+				qdel(W)
+				var/mat_overlay = "fab-load-bluespace"
+				add_overlay(mat_overlay)
+				sleep(10)
+				if(!QDELETED(src))
+					cut_overlay(mat_overlay)
 
 		updateUsrDialog()
 
@@ -466,3 +481,27 @@
 
 /obj/machinery/mecha_part_fabricator/proc/material2name(ID)
 	return copytext(ID,2)
+
+/obj/machinery/mecha_part_fabricator/proc/is_insertion_ready(mob/user)
+	if(panel_open)
+		to_chat(user, "<span class='warning'>You can't load [src] while it's opened!</span>")
+		return FALSE
+	if(being_built)
+		to_chat(user, "<span class='warning'>\The [src] is currently processing! Please wait until completion.</span>")
+		return FALSE
+
+	return TRUE
+
+
+/obj/machinery/mecha_part_fabricator/proc/try_insert(mob/user, obj/item/I, material_amount)
+	if(!material_amount)
+		to_chat(user, "<span class='warning'>This object does not contain sufficient amounts of materials to be accepted by [src].</span>")
+		return FALSE
+	if(!materials.has_space(material_amount))
+		to_chat(user, "<span class='warning'>\The [src] is full. Please remove some materials from [src] in order to insert more.</span>")
+		return FALSE
+	if(!user.temporarilyRemoveItemFromInventory(I))
+		to_chat(user, "<span class='warning'>\The [I] is stuck to you and cannot be placed into [src].</span>")
+		return FALSE
+
+	return TRUE