Converts gas, mat and reagent strings to defines

code/modules/power/fusion/core/core_field.dm

@@ -303,8 +303,8 @@
 	var/turf/T = get_turf(src)
 	if(istype(T))
 		var/datum/gas_mixture/plasma = new
-		plasma.adjust_gas("oxygen", (size*100), 0)
-		plasma.adjust_gas("phoron", (size*100), 0)
+		plasma.adjust_gas(GAS_O2, (size*100), 0)
+		plasma.adjust_gas(GAS_PHORON, (size*100), 0)
 		plasma.temperature = (plasma_temperature/2)
 		plasma.update_values()
 		T.assume_air(plasma)
@@ -639,8 +639,8 @@
 		var/turf/TT = get_turf(pick(turfs_in_range))
 		if(istype(TT))
 			var/datum/gas_mixture/plasma = new
-			plasma.adjust_gas("oxygen", (size*100), 0)
-			plasma.adjust_gas("phoron", (size*100), 0)
+			plasma.adjust_gas(GAS_O2, (size*100), 0)
+			plasma.adjust_gas(GAS_PHORON, (size*100), 0)
 			plasma.temperature = (plasma_temperature/2)
 			plasma.update_values()
 			TT.assume_air(plasma)
@@ -655,8 +655,8 @@
 	var/turf/TT = get_turf(owned_core)
 	if(istype(TT))
 		var/datum/gas_mixture/plasma = new
-		plasma.adjust_gas("oxygen", (size*100), 0)
-		plasma.adjust_gas("phoron", (size*100), 0)
+		plasma.adjust_gas(GAS_O2, (size*100), 0)
+		plasma.adjust_gas(GAS_PHORON, (size*100), 0)
 		plasma.temperature = (plasma_temperature/2)
 		plasma.update_values()
 		TT.assume_air(plasma)

code/modules/power/fusion/fuel_assembly/fuel_assembly.dm

@@ -7,7 +7,7 @@
 
 	var/percent_depleted = 1
 	var/list/rod_quantities = list()
-	var/fuel_type = "composite"
+	var/fuel_type = MAT_COMPOSITE
 	var/fuel_colour
 	var/radioactivity = 0
 	var/const/initial_amount = 3000000
@@ -54,13 +54,13 @@
 
 // Mapper shorthand.
 /obj/item/fuel_assembly/deuterium/New(var/newloc)
-	..(newloc, "deuterium")
+	..(newloc, MAT_DEUTERIUM)
 
 /obj/item/fuel_assembly/tritium/New(var/newloc)
-	..(newloc, "tritium")
+	..(newloc, MAT_TRITIUM)
 
 /obj/item/fuel_assembly/phoron/New(var/newloc)
-	..(newloc, "phoron")
+	..(newloc, MAT_PHORON)
 
 /obj/item/fuel_assembly/supermatter/New(var/newloc)
-	..(newloc, "supermatter")
+	..(newloc, MAT_SUPERMATTER)

code/modules/power/fusion/fusion_reactions.dm

@@ -76,8 +76,8 @@ var/list/fusion_reactions
 
 // Unideal/material production reactions
 /decl/fusion_reaction/oxygen_oxygen
-	p_react = "oxygen"
-	s_react = "oxygen"
+	p_react = REAGENT_ID_OXYGEN
+	s_react = REAGENT_ID_OXYGEN
 	energy_consumption = 10
 	energy_production = 0
 	instability = 5
@@ -85,17 +85,17 @@ var/list/fusion_reactions
 	products = list("silicon"= 1)
 
 /decl/fusion_reaction/iron_iron
-	p_react = "iron"
-	s_react = "iron"
-	products = list("silver" = 1, "gold" = 1, "platinum" = 1) // Not realistic but w/e
+	p_react = REAGENT_ID_IRON
+	s_react = REAGENT_ID_IRON
+	products = list(REAGENT_ID_SILVER = 1, REAGENT_ID_GOLD = 1, REAGENT_ID_PLATINUM = 1) // Not realistic but w/e
 	energy_consumption = 10
 	energy_production = 0
 	instability = 2
 	minimum_reaction_temperature = 10000
 
 /decl/fusion_reaction/phoron_hydrogen
-	p_react = "hydrogen"
-	s_react = "phoron"
+	p_react = REAGENT_ID_HYDROGEN
+	s_react = REAGENT_ID_PHORON
 	energy_consumption = 10
 	energy_production = 0
 	instability = 5
@@ -105,7 +105,7 @@ var/list/fusion_reactions
 // VERY UNIDEAL REACTIONS.
 /decl/fusion_reaction/phoron_supermatter
 	p_react = "supermatter"
-	s_react = "phoron"
+	s_react = REAGENT_ID_PHORON
 	energy_consumption = 0
 	energy_production = 5
 	radiation = 20
@@ -145,7 +145,7 @@ var/list/fusion_reactions
 // High end reactions.
 /decl/fusion_reaction/boron_hydrogen
 	p_react = "boron"
-	s_react = "hydrogen"
+	s_react = REAGENT_ID_HYDROGEN
 	minimum_energy_level = FUSION_HEAT_CAP * 0.5
 	energy_consumption = 3
 	energy_production = 15
@@ -153,8 +153,8 @@ var/list/fusion_reactions
 	instability = 3
 
 /decl/fusion_reaction/hydrogen_hydrogen
-	p_react = "hydrogen"
-	s_react = "hydrogen"
+	p_react = REAGENT_ID_HYDROGEN
+	s_react = REAGENT_ID_HYDROGEN
 	minimum_energy_level = FUSION_HEAT_CAP * 0.75
 	energy_consumption = 0
 	energy_production = 20