From 27719075731e54c1eb68c0c56f940faba7b2f765 Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Thu, 6 Aug 2015 14:58:52 +0100
Subject: [PATCH] Support room aliases in url bar and show them for rooms that
 have them

---
 examples/vector/index.js              | 10 +++++++-
 src/controllers/organisms/RoomView.js |  1 +
 src/controllers/pages/MatrixChat.js   | 34 +++++++++++++++++++++++----
 3 files changed, 39 insertions(+), 6 deletions(-)

diff --git a/examples/vector/index.js b/examples/vector/index.js
index 64e517ca8..1e1ec91b4 100644
--- a/examples/vector/index.js
+++ b/examples/vector/index.js
@@ -24,6 +24,8 @@ var React = require("react");
 // maps cannot pass through two stages).
 var MatrixReactSdk = require("../../src/index");
 
+var lastLocationHashSet = null;
+
 // Here, we do some crude URL analysis to allow
 // deep-linking. We only support registration
 // deep-links in this example.
@@ -46,6 +48,10 @@ function routeUrl(location) {
 }
 
 function onHashChange(ev) {
+    if (decodeURIComponent(window.location.hash) == lastLocationHashSet) {
+        // we just set this: no need to route it!
+        return;
+    }
     routeUrl(window.location);
 }
 
@@ -55,7 +61,9 @@ var loaded = false;
 // so a web page can update the URL bar appropriately.
 var onNewScreen = function(screen) {
     if (!loaded) return;
-    window.location.hash = '#/'+screen;
+    var hash = '#/' + screen;
+    lastLocationHashSet = hash;
+    window.location.hash = hash;
 }
 
 // We use this to work out what URL the SDK should
diff --git a/src/controllers/organisms/RoomView.js b/src/controllers/organisms/RoomView.js
index e03c9a972..2042885c6 100644
--- a/src/controllers/organisms/RoomView.js
+++ b/src/controllers/organisms/RoomView.js
@@ -202,6 +202,7 @@ module.exports = {
 
     fillSpace: function() {
         var messageWrapper = this.refs.messageWrapper.getDOMNode();
+        if (!messageWrapper) return;
         if (messageWrapper.scrollTop < messageWrapper.clientHeight && this.state.room.oldState.paginationToken) {
             this.setState({paginating: true});
 
diff --git a/src/controllers/pages/MatrixChat.js b/src/controllers/pages/MatrixChat.js
index ded72a097..065e83159 100644
--- a/src/controllers/pages/MatrixChat.js
+++ b/src/controllers/pages/MatrixChat.js
@@ -23,9 +23,11 @@ var MatrixClientPeg = require("../../MatrixClientPeg");
 var RoomListSorter = require("../../RoomListSorter");
 var Presence = require("../../Presence");
 var dis = require("../../dispatcher");
+var q = require("q");
 
 var ComponentBroker = require('../../ComponentBroker');
 var Notifier = ComponentBroker.get('organisms/Notifier');
+var MatrixTools = require('../../MatrixTools');
 
 module.exports = {
     PageTypes: {
@@ -136,7 +138,13 @@ module.exports = {
                     currentRoom: payload.room_id,
                     page_type: this.PageTypes.RoomView,
                 });
-                this.notifyNewScreen('room/'+payload.room_id);
+                var presentedId = payload.room_id;
+                var room = MatrixClientPeg.get().getRoom(payload.room_id);
+                if (room) {
+                    var theAlias = MatrixTools.getCanonicalAliasForRoom(room);
+                    if (theAlias) presentedId = theAlias;
+                }
+                this.notifyNewScreen('room/'+presentedId);
                 break;
             case 'view_prev_room':
                 roomIndexDelta = -1;
@@ -249,10 +257,26 @@ module.exports = {
                 params: params
             });
         } else if (screen.indexOf('room/') == 0) {
-            var roomId = screen.split('/')[1];
-            dis.dispatch({
-                action: 'view_room',
-                room_id: roomId
+            var roomString = screen.split('/')[1];
+            var defer = q.defer();
+            if (roomString[0] == '#') {
+                var self = this;
+                MatrixClientPeg.get().getRoomIdForAlias(roomString).done(function(result) {
+                    self.setState({ready: true});
+                    defer.resolve(result.room_id);
+                }, function() {
+                    self.setState({ready: true});
+                    defer.resolve(null);
+                });
+                this.setState({ready: false});
+            } else {
+                defer.resolve(roomString);
+            }
+            defer.promise.done(function(roomId) {
+                dis.dispatch({
+                    action: 'view_room',
+                    room_id: roomId
+                });
             });
         }
     },