Add information message to a sec level announcement

modular_ss220/balance/_balance.dme

@@ -2,6 +2,7 @@
 
 #include "code/access/access.dm"
 #include "code/events/blob.dm"
+#include "code/events/security_level.dm"
 #include "code/items/projectiles.dm"
 #include "code/items/radio.dm"
 #include "code/items/storage/surgical_tray.dm"

modular_ss220/balance/code/events/security_level.dm

@@ -0,0 +1,34 @@
+/datum/security_level
+	/// Tells if every crew member will be allowed to talk on the common frequency.
+	var/grants_common_channel_access = FALSE
+
+/datum/security_level/gamma
+	grants_common_channel_access = TRUE
+
+/datum/security_level/epsilon
+	grants_common_channel_access = TRUE
+
+/datum/security_level/delta
+	grants_common_channel_access = TRUE
+
+/datum/controller/subsystem/security_level/announce_security_level(datum/security_level/selected_level)
+	var/message
+	var/title
+	var/sound
+	var/sound2 = selected_level.ai_announcement_sound
+
+	if(selected_level.number_level > current_security_level.number_level)
+		message = selected_level.elevating_to_announcement_text
+		title =	selected_level.elevating_to_announcement_title
+		sound =	selected_level.elevating_to_sound
+	else
+		message = selected_level.lowering_to_announcement_text
+		title =	selected_level.lowering_to_announcement_title
+		sound =	selected_level.lowering_to_sound
+
+	if(selected_level.grants_common_channel_access && !current_security_level.grants_common_channel_access)
+		message += " Ограничения на пользование общим каналом связи сняты."
+	else if(!selected_level.grants_common_channel_access && current_security_level.grants_common_channel_access)
+		message += " Ограничения на пользование общим каналом связи восстановлены."
+
+	GLOB.security_announcement.Announce(message, title, new_sound = sound, new_sound2 = sound2)