Conditionally allow ASCII characters (for Xaekai)

lib/channel/chat.js

@@ -116,8 +116,14 @@ ChatModule.prototype.handleChatMsg = function (user, data) {
         return;
     }
 
-    // Limit to 240 characters, disallow all ASCII control characters except tab (\t)
-    data.msg = data.msg.substring(0, 240).replace(/[\x00-\x08\x0a-\x1f]+/g, " ");
+    // Limit to 240 characters
+    data.msg = data.msg.substring(0, 240);
+    // If channel doesn't permit them, strip ASCII control characters
+    if (!this.channel.modules.options ||
+        !this.channel.modules.options.get("allow_ascii_control")) {
+
+        data.msg = data.msg.replace(/[\x00-\x1f]+/g, " ");
+    }
 
     // Disallow blankposting
     if (!data.msg.trim()) {

lib/channel/opts.js

@@ -23,7 +23,8 @@ function OptionsModule(channel) {
         enable_link_regex: true,   // Use the built-in link filter
         password: false,           // Channel password (false -> no password required for entry)
         allow_dupes: false,        // Allow duplicate videos on the playlist
-        torbanned: false         // Block connections from Tor exit nodes
+        torbanned: false,          // Block connections from Tor exit nodes
+        allow_ascii_control: false // Allow ASCII control characters (\x00-\x1f)
     };
 }
 
@@ -249,6 +250,10 @@ OptionsModule.prototype.handleSetOptions = function (user, data) {
         this.opts.torbanned = Boolean(data.torbanned);
     }
 
+    if ("allow_ascii_control" in data && user.account.effectiveRank >= 3) {
+        this.opts.allow_ascii_control = Boolean(data.allow_ascii_control);
+    }
+
     this.channel.logger.log("[mod] " + user.getName() + " updated channel options");
     this.sendOpts(this.channel.users);
 };

templates/channeloptions.jade

@@ -76,6 +76,7 @@ mixin adminoptions
       mixin textbox-auto("cs-externaljs", "External Javascript", "Script URL")
       mixin rcheckbox-auto("cs-show_public", "List channel publicly")
       mixin rcheckbox-auto("cs-torbanned", "Block connections from Tor")
+      mixin rcheckbox-auto("cs-allow_ascii_control", "Allow ASCII control characters (e.g. newlines)")
       .form-group
         .col-sm-8.col-sm-offset-4
           span.text-info Changes are automatically saved.

www/js/util.js

@@ -865,6 +865,7 @@ function handleModPermissions() {
     $("#cs-voteskip_ratio").val(CHANNEL.opts.voteskip_ratio);
     $("#cs-allow_dupes").val(CHANNEL.opts.allow_dupes);
     $("#cs-torbanned").val(CHANNEL.opts.torbanned);
+    $("#cs-allow_ascii_control").val(CHANNEL.opts.allow_ascii_control);
     (function() {
         if(typeof CHANNEL.opts.maxlength != "number") {
             $("#cs-maxlength").val("");