Chat Filter

code/controllers/configuration/entries/general.dm

@@ -672,3 +672,5 @@ This maintains a list of ip addresses that are able to bypass topic filtering.
 /datum/config_entry/string/repo_name
 
 /datum/config_entry/string/org
+
+/datum/config_entry/str_list/word_filter

code/game/verbs/ooc.dm

@@ -7,6 +7,9 @@
 		to_chat(src, "Guests may not use OOC.")
 		return
 
+	if(!filter_message(src, msg))
+		return
+
 	msg = trim(strip_html(msg))
 	if(!msg) return
 
@@ -101,6 +104,9 @@
 		to_chat(src, "Guests may not use LOOC.")
 		return
 
+	if(!filter_message(src, msg))
+		return
+
 	msg = trim(strip_html(msg))
 	if(!msg) return
 

code/modules/mob/dead/observer/say.dm

@@ -12,6 +12,9 @@
 		if (src.client.handle_spam_prevention(message, MUTE_DEADCHAT))
 			return
 
+	if(!filter_message(src, message))
+		return
+
 	. = src.say_dead(message)
 
 

code/modules/mob/living/say.dm

@@ -62,6 +62,24 @@ GLOBAL_LIST_INIT(department_radio_keys, list(
 /proc/prefix_to_channel(prefix)
 	return GLOB.department_radio_keys[prefix]
 
+/proc/filter_message(user, message)
+	var/list/banned_words = CONFIG_GET(str_list/word_filter)
+	var/message_lowercase = lowertext(message)
+
+	for(var/word in banned_words)
+		if(findtext(message_lowercase, regex(lowertext(word))))
+			to_chat(user,
+				html = "\n<font color='red' size='4'><b>-- Word Filter Message --</b></font>",
+				)
+			to_chat(user,
+				type = MESSAGE_TYPE_ADMINPM,
+				html = "\n<font color='red' size='4'><b>Your message has been automatically filtered due to its contents. Trying to circumvent this filter will get you banned.</b></font>",
+				)
+			SEND_SOUND(user, sound('sound/effects/adminhelp_new.ogg'))
+			return FALSE
+
+	return TRUE
+
 ///Shows custom speech bubbles for screaming, *warcry etc.
 /mob/living/proc/show_speech_bubble(bubble_name, bubble_type = bubble_icon)
 
@@ -81,6 +99,9 @@ GLOBAL_LIST_INIT(department_radio_keys, list(
 
 	if(SEND_SIGNAL(src, COMSIG_LIVING_SPEAK, message, speaking, verb, alt_name, italics, message_range, speech_sound, sound_vol, nolog, message_mode) & COMPONENT_OVERRIDE_SPEAK) return
 
+	if(!filter_message(src, message))
+		return
+
 	message = process_chat_markup(message, list("~", "_"))
 
 	for(var/dst=0; dst<=1; dst++) //Will run twice if src has a clone

config/example/config.txt

@@ -5,6 +5,7 @@
 # $include resources.txt
 # $include icon_source.txt
 # $include relays.txt
+$include word_filter.txt
 
 ## Server name: This appears at the top of the screen in-game. In this case it will read "tgstation: station_name" where station_name is the randomly generated name of the station for the round. Remove the # infront of SERVERNAME and replace 'tgstation' with the name of your choice
 # SERVERNAME spacestation13

config/example/word_filter.txt

@@ -0,0 +1,6 @@
+## Word filter
+## WORD_FILTER <word>
+## Case insensitive, Uses regex
+#WORD_FILTER wordToBan
+#WORD_FILTER otherwordtoban
+#WORD_FILTER wordtoban.*withregex