Bug 1204273 - Implement nick and msg commands for XMPP muc. r=aleth

chat/locales/en-US/xmpp.properties

@@ -72,6 +72,8 @@ conversation.error.nickNotInRoom=%S is not in the room.
 conversation.error.banCommandAnonymousRoom=You can't ban participants from anonymous rooms. Try /kick instead.
 conversation.error.banKickCommandNotAllowed=You don't have the required privileges to remove this participant from the room.
 conversation.error.banKickCommandConflict=Sorry, you can't remove yourself from the room.
+conversation.error.changeNickFailedConflict=Could not change your nick to %S as this nick is already in use.
+conversation.error.changeNickFailedNotAcceptable=Could not change your nick to %S as nicks are locked down in this room.
 conversation.error.unknownError=Unknown error
 
 # LOCALIZATION NOTE (tooltip.*):
@@ -227,3 +229,5 @@ command.part2=%S [<message>]: Leave the current room with an optional mess
 command.topic=%S [<new topic>]: Set this room's topic.
 command.ban=%S <nick>[<message>]: Ban someone from the room. You must be a room administrator to do this.
 command.kick=%S <nick>[<message>]: Remove someone from the room. You must be a room moderator to do this.
+command.nick=%S <new nickname>: Change your nickname.
+command.msg=%S <nick> <message>: Send a private message to a participant in the room.

chat/protocols/xmpp/xmpp-commands.jsm

@@ -98,7 +98,7 @@ var commands = [
   },
   {
     name: "ban",
-    get helpString() _("command.ban", "ban"),
+    get helpString() { return _("command.ban", "ban"); },
     usageContext: Ci.imICommand.CMD_CONTEXT_CHAT,
     run: function(aMsg, aConv) {
       let params = splitInput(aMsg);
@@ -113,7 +113,7 @@ var commands = [
   },
   {
     name: "kick",
-    get helpString() _("command.kick", "kick"),
+    get helpString() { return _("command.kick", "kick"); },
     usageContext: Ci.imICommand.CMD_CONTEXT_CHAT,
     run: function(aMsg, aConv) {
       let params = splitInput(aMsg);
@@ -125,5 +125,51 @@ var commands = [
         conv.ban(params[0], params[1]);
       return true;
     }
+  },
+  {
+    name: "nick",
+    get helpString() { return _("command.nick", "nick"); },
+    usageContext: Ci.imICommand.CMD_CONTEXT_CHAT,
+    run: function(aMsg, aConv) {
+      let params = aMsg.trim().split(/\s+/);
+      if (!params[0])
+        return false;
+
+      let conv = getConv(aConv);
+      if (!conv.left)
+        conv.setNick(params[0]);
+      return true;
+    }
+  },
+  {
+    name: "msg",
+    get helpString() { return _("command.msg", "msg"); },
+    usageContext: Ci.imICommand.CMD_CONTEXT_CHAT,
+    run: function(aMsg, aConv, aReturnedConv) {
+      let params = splitInput(aMsg);
+      if (params.length != 2)
+        return false;
+      let [nickName, msg] = params;
+
+      let conv = getConv(aConv);
+      if (conv.left)
+        return true;
+
+      if (!conv._participants.has(nickName)) {
+        conv.writeMessage(conv.name,
+                          _("conversation.error.nickNotInRoom", nickName),
+                          {system: true});
+        return true;
+      }
+      let account = getAccount(aConv);
+      let privateConv = account.createConversation(conv.name + "/" + nickName);
+      if (!privateConv)
+        return true;
+      privateConv.sendMsg(msg.trim());
+
+      if (aReturnedConv)
+        aReturnedConv.value = privateConv;
+      return true;
+    }
   }
 ];

chat/protocols/xmpp/xmpp.jsm

@@ -493,6 +493,32 @@ const XMPPMUCConversationPrototype = {
     return false;
   },
 
+  // Changes nick in MUC conversation to a new one.
+  setNick: function(aNewNick) {
+    let notAcceptable = (aError) => {
+      // XEP-0045 (7.6): Changing Nickname (example 53).
+      let message = _("conversation.error.changeNickFailedNotAcceptable",
+                      aNewNick);
+      this.writeMessage(this.name, message, {system: true, error: true});
+      // TODO: We should then discover user's reserved nickname (it could be
+      // discovered before joining a room).
+      // XEP-0045 (7.12): Discovering Reserved Room Nickname.
+      return true;
+    };
+    let conflict = (aError) => {
+      // XEP-0045 (7.2.9): Nickname Conflict.
+      let message = _("conversation.error.changeNickFailedConflict", aNewNick);
+      this.writeMessage(this.name, message, {system: true, error: true});
+      return true;
+    };
+    let errorHandler = this._account.handleErrors({notAcceptable: notAcceptable,
+                                                   conflict: conflict});
+
+    // XEP-0045 (7.6): Changing Nickname.
+    let s = Stanza.presence({to: this.name + "/" + aNewNick}, null);
+    this._account.sendStanza(s, errorHandler);
+  },
+
   /* Called when the user closed the conversation */
   close: function() {
     if (!this.left)