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)
+    // Limit to 240 characters
-    data.msg = data.msg.substring(0, 240).replace(/[\x00-\x08\x0a-\x1f]+/g, " ");
+    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

@@ -6,24 +6,25 @@ var url = require("url");
 function OptionsModule(channel) {
     ChannelModule.apply(this, arguments);
     this.opts = {
-        allow_voteskip: true,    // Allow users to voteskip
+        allow_voteskip: true,      // Allow users to voteskip
-        voteskip_ratio: 0.5,     // Ratio of skip votes:non-afk users needed to skip the video
+        voteskip_ratio: 0.5,       // Ratio of skip votes:non-afk users needed to skip the video
-        afk_timeout: 600,        // Number of seconds before a user is automatically marked afk
+        afk_timeout: 600,          // Number of seconds before a user is automatically marked afk
         pagetitle: this.channel.name, // Title of the browser tab
-        maxlength: 0,            // Maximum length (in seconds) of a video queued
+        maxlength: 0,              // Maximum length (in seconds) of a video queued
-        externalcss: "",         // Link to external stylesheet
+        externalcss: "",           // Link to external stylesheet
-        externaljs: "",          // Link to external script
+        externaljs: "",            // Link to external script
-        chat_antiflood: false,   // Throttle chat messages
+        chat_antiflood: false,     // Throttle chat messages
         chat_antiflood_params: {
-            burst: 4,            // Number of messages to allow with no throttling
+            burst: 4,              // Number of messages to allow with no throttling
-            sustained: 1,        // Throttle rate (messages/second)
+            sustained: 1,          // Throttle rate (messages/second)
-            cooldown: 4          // Number of seconds with no messages before burst is reset
+            cooldown: 4            // Number of seconds with no messages before burst is reset
         },
-        show_public: false,      // List the channel on the index page
+        show_public: false,        // List the channel on the index page
-        enable_link_regex: true, // Use the built-in link filter
+        enable_link_regex: true,   // Use the built-in link filter
-        password: false,         // Channel password (false -> no password required for entry)
+        password: false,           // Channel password (false -> no password required for entry)
-        allow_dupes: false,      // Allow duplicate videos on the playlist
+        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("");