Adds a way to filter BZ gas with scrubbers and air alarms

code/modules/atmospherics/machinery/airalarm.dm

@@ -232,7 +232,8 @@
 					"widenet"		= info["widenet"],
 					"filter_co2"	= info["filter_co2"],
 					"filter_toxins"	= info["filter_toxins"],
-					"filter_n2o"	= info["filter_n2o"]
+					"filter_n2o"	= info["filter_n2o"],
+					"filter_bz"		= info["filter_bz"]
 				))
 		data["mode"] = mode
 		data["modes"] = list()
@@ -288,7 +289,7 @@
 			if(usr.has_unlimited_silicon_privilege && !wires.is_cut(WIRE_IDSCAN))
 				locked = !locked
 				. = TRUE
-		if("power", "co2_scrub", "tox_scrub", "n2o_scrub", "widenet", "scrubbing")
+		if("power", "co2_scrub", "tox_scrub", "n2o_scrub", "bz_scrub", "widenet", "scrubbing")
 			send_signal(device_id, list("[action]" = text2num(params["val"])))
 			. = TRUE
 		if("excheck")
@@ -405,6 +406,7 @@
 					"co2_scrub" = 1,
 					"tox_scrub" = 0,
 					"n2o_scrub" = 0,
+					"bz_scrub"	= 0,
 					"scrubbing" = 1,
 					"widenet" = 0,
 				))
@@ -421,6 +423,7 @@
 					"co2_scrub" = 1,
 					"tox_scrub" = 1,
 					"n2o_scrub" = 1,
+					"bz_scrub"	= 1,
 					"scrubbing" = 1,
 					"widenet" = 1,
 				))
@@ -450,6 +453,7 @@
 					"co2_scrub" = 1,
 					"tox_scrub" = 0,
 					"n2o_scrub" = 0,
+					"bz_scrub"	= 0,
 					"scrubbing" = 1,
 					"widenet" = 0,
 				))

code/modules/atmospherics/machinery/components/unary_devices/vent_scrubber.dm

@@ -19,6 +19,7 @@
 	var/scrub_CO2 = 1
 	var/scrub_Toxins = 0
 	var/scrub_N2O = 0
+	var/scrub_BZ = 0
 
 	var/volume_rate = 200
 	var/widenet = 0 //is this scrubber acting on the 3x3 area around it.
@@ -60,16 +61,18 @@
 	var/amount = idle_power_usage
 
 	if(scrubbing & SCRUBBING)
-		if (scrub_CO2)
+		if(scrub_CO2)
 			amount += idle_power_usage
-		if (scrub_Toxins)
+		if(scrub_Toxins)
 			amount += idle_power_usage
-		if (scrub_N2O)
+		if(scrub_N2O)
+			amount += idle_power_usage
+		if(scrub_BZ)
 			amount += idle_power_usage
 	else //scrubbing == SIPHONING
 		amount = active_power_usage
 
-	if (widenet)
+	if(widenet)
 		amount += amount * (adjacent_turfs.len * (adjacent_turfs.len / 2))
 	use_power(amount, power_channel)
 	return 1
@@ -115,6 +118,7 @@
 		"filter_co2" = scrub_CO2,
 		"filter_toxins" = scrub_Toxins,
 		"filter_n2o" = scrub_N2O,
+		"filter_bz" = scrub_BZ,
 		"sigtype" = "status"
 	)
 
@@ -200,6 +204,11 @@
 				filtered_out.gases["n2o"][MOLES] = removed_gases["n2o"][MOLES]
 				removed.gases["n2o"][MOLES] = 0
 
+			if(scrub_BZ && removed_gases["bz"])
+				filtered_out.assert_gas("bz")
+				filtered_out.gases["bz"][MOLES] = removed_gases["bz"][MOLES]
+				removed.gases["bz"][MOLES] = 0
+
 			removed.garbage_collect()
 
 			//Remix the resulting gases
@@ -275,6 +284,11 @@
 	if("toggle_n2o_scrub" in signal.data)
 		scrub_N2O = !scrub_N2O
 
+	if("bz_scrub" in signal.data)
+		scrub_BZ = text2num(signal.data["bz_scrub"])
+	if("toggle_bz_scrub" in signal.data)
+		scrub_BZ = !scrub_BZ
+
 	if("init" in signal.data)
 		name = signal.data["init"]
 		return

tgui/src/interfaces/airalarm/scrubbers.ract

@@ -25,6 +25,8 @@
           action='n2o_scrub' params='{"id_tag": "{{id_tag}}", "val": {{+!filter_n2o}}}'>N2O</ui-button>
         <ui-button icon='{{filter_toxins ? "check-square-o" : "square-o"}}' style='{{filter_toxins ? "selected" : null}}'
           action='tox_scrub' params='{"id_tag": "{{id_tag}}", "val": {{+!filter_toxins}}}'>Plasma</ui-button>
+		<ui-button icon='{{filter_bz ? "check-square-o" : "square-o"}}' style='{{filter_bz ? "selected" : null}}'
+		  action='bz_scrub' params='{"id_tag": "{{id_tag}}", "val": {{+!filter_bz}}}'>BZ</ui-button>
       </ui-section>
     </ui-subdisplay>
   {{else}}