Added event stream service which neatly blobs together requests / state for the event stream. This depends on matrix service to do the actual hit. Currently this has exactly the same behaviour as before.

webclient/components/matrix/event-stream-service.js

@@ -0,0 +1,69 @@
+/*
+Copyright 2014 matrix.org
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+'use strict';
+
+angular.module('eventStreamService', [])
+.factory('eventStreamService', ['matrixService', function(matrixService) {
+    var settings = {
+        from: "END",
+        to: undefined,
+        limit: undefined,
+        shouldPoll: true
+    };
+    
+    // interrupts the stream. Only valid if there is a stream conneciton 
+    // open.
+    var interrupt = function(shouldPoll) {
+        console.log("[EventStream] interrupt("+shouldPoll+") "+
+                    JSON.stringify(settings));
+    };
+    
+    var saveStreamSettings = function() {
+        localStorage.setItem("streamSettings", JSON.stringify(settings));
+    };
+    
+    return {
+        // resume the stream from whereever it last got up to. Typically used
+        // when the page is opened.
+        resume: function() {
+            console.log("[EventStream] resume "+JSON.stringify(settings));
+            // run the stream from the latest token
+            return matrixService.getEventStream(settings.from, 5000);
+        },
+        
+        // pause the stream. Resuming it will continue from the current position
+        pause: function() {
+            console.log("[EventStream] pause "+JSON.stringify(settings));
+            // kill any running stream
+            interrupt(false);
+            // save the latest token
+            saveStreamSettings();
+        },
+        
+        // stop the stream and wipe the position in the stream. Typically used
+        // when logging out.
+        stop: function() {
+            console.log("[EventStream] stop "+JSON.stringify(settings));
+            // kill any running stream
+            interrupt(false);
+            // clear the latest token
+            settings.from = "END";
+            saveStreamSettings();
+        }
+    };
+
+}]);