Ports ping verb from /tg/ (#7837)

* Ports ping verb from /tg/

* Adds non-versioned files

* Removes old flag

code/modules/client/verbs/ignore.dm

@@ -0,0 +1,48 @@
+/client/verb/ignore(key_to_ignore as text)
+	set name = "Ignore"
+	set category = "OOC"
+	set desc = "Makes OOC and Deadchat messages from a specific player not appear to you."
+
+	if(!key_to_ignore)
+		return
+	key_to_ignore = ckey(sanitize(key_to_ignore))
+	if(prefs && prefs.ignored_players)
+		if(key_to_ignore in prefs.ignored_players)
+			to_chat(usr, "<span class='warning'>[key_to_ignore] is already being ignored.</span>")
+			return
+		if(key_to_ignore == usr.ckey)
+			to_chat(usr, "<span class='notice'>You can't ignore yourself.</span>")
+			return
+
+		prefs.ignored_players |= key_to_ignore
+		SScharacter_setup.queue_preferences_save(prefs)
+		to_chat(usr, "<span class='notice'>Now ignoring <b>[key_to_ignore]</b>.</span>")
+
+/client/verb/unignore(key_to_unignore as text)
+	set name = "Unignore"
+	set category = "OOC"
+	set desc = "Reverts your ignoring of a specific player."
+
+	if(!key_to_unignore)
+		return
+	key_to_unignore = ckey(sanitize(key_to_unignore))
+	if(prefs && prefs.ignored_players)
+		if(!(key_to_unignore in prefs.ignored_players))
+			to_chat(usr, "<span class='warning'>[key_to_unignore] isn't being ignored.</span>")
+			return
+		prefs.ignored_players -= key_to_unignore
+		SScharacter_setup.queue_preferences_save(prefs)
+		to_chat(usr, "<span class='notice'>Reverted ignore on <b>[key_to_unignore]</b>.</span>")
+
+/mob/proc/is_key_ignored(var/key_to_check)
+	if(client)
+		return client.is_key_ignored(key_to_check)
+	return 0
+
+/client/proc/is_key_ignored(var/key_to_check)
+	key_to_check = ckey(key_to_check)
+	if(key_to_check in prefs.ignored_players)
+		if(GLOB.directory[key_to_check] in admins) // This is here so this is only evaluated if someone is actually being blocked.
+			return 0
+		return 1
+	return 0