Add scrollback to store interface

lib/store/memory.js

@@ -87,6 +87,17 @@ module.exports.MatrixInMemoryStore.prototype = {
      */
     getUser: function(userId) {
         return this.users[userId] || null;
+    },
+
+    /**
+     * Retrieve scrollback for this room.
+     * @param {Room} room The matrix room
+     * @param {integer} limit The max number of old events to retrieve.
+     * @return {Array<Object>} An array of objects which will be at most 'limit'
+     * length and at least 0. The objects are the raw event JSON.
+     */
+    scrollback: function(room, limit) {
+        return [];
     }
 
     // TODO

lib/store/stub.js

@@ -76,6 +76,16 @@ StubStore.prototype = {
      */
     getUser: function(userId) {
         return null;
+    },
+
+    /**
+     * No-op.
+     * @param {Room} room
+     * @param {integer} limit
+     * @return {Array}
+     */
+    scrollback: function(room, limit) {
+        return [];
     }
 
     // TODO

lib/store/webstorage.js

@@ -139,77 +139,80 @@ function WebStorageStore(store, batchSize) {
     }
 }
 
-WebStorageStore.prototype = {
 
-    /**
+/**
-     * Retrieve the token to stream from.
+ * Retrieve the token to stream from.
-     * @return {string} The token or null.
+ * @return {string} The token or null.
-     */
+ */
-    getSyncToken: function() {
+WebStorageStore.prototype.getSyncToken = function() {
-        return null;
+    return this.store.getItem("sync_token");
-    },
+};
 
-    /**
+/**
-     * Set the token to stream from.
+ * Set the token to stream from.
-     * @param {string} token The token to stream from.
+ * @param {string} token The token to stream from.
-     */
+ */
-    setSyncToken: function(token) {
+WebStorageStore.prototype.setSyncToken = function(token) {
+    this.store.setItem("sync_token", token);
+};
 
-    },
+/**
+ * Store a room in web storage.
+ * @param {Room} room
+ */
+WebStorageStore.prototype.storeRoom = function(room) {
+};
 
-    /**
+/**
-     * Store a room in web storage.
+ * Retrieve a room from web storage.
-     * @param {Room} room
+ * @param {string} roomId
-     */
+ * @return {null}
-    storeRoom: function(room) {
+ */
-    },
+WebStorageStore.prototype.getRoom = function(roomId) {
+    return null;
+};
 
-    /**
+/**
-     * Retrieve a room from web storage.
+ * Get a list of all rooms from web storage.
-     * @param {string} roomId
+ * @return {Array} An empty array.
-     * @return {null}
+ */
-     */
+WebStorageStore.prototype.getRooms = function() {
-    getRoom: function(roomId) {
+    return [];
-        return null;
+};
-    },
 
-    /**
+/**
-     * Get a list of all rooms from web storage.
+ * Get a list of summaries from web storage.
-     * @return {Array} An empty array.
+ * @return {Array} An empty array.
-     */
+ */
-    getRooms: function() {
+WebStorageStore.prototype.getRoomSummaries = function() {
-        return [];
+    return [];
-    },
+};
 
-    /**
+/**
-     * Get a list of summaries from web storage.
+ * Store a user in web storage.
-     * @return {Array} An empty array.
+ * @param {User} user
-     */
+ */
-    getRoomSummaries: function() {
+WebStorageStore.prototype.storeUser = function(user) {
-        return [];
+};
-    },
 
-    /**
+/**
-     * Store a user in web storage.
+ * Get a user from web storage.
-     * @param {User} user
+ * @param {string} userId
-     */
+ * @return {null}
-    storeUser: function(user) {
+ */
-    },
+WebStorageStore.prototype.getUser = function(userId) {
+    return null;
+};
 
-    /**
+/**
-     * Get a user from web storage.
+ * Retrieve scrollback for this room.
-     * @param {string} userId
+ * @param {Room} room The matrix room
-     * @return {null}
+ * @param {integer} limit The max number of old events to retrieve.
-     */
+ * @return {Array<Object>} An array of objects which will be at most 'limit'
-    getUser: function(userId) {
+ * length and at least 0. The objects are the raw event JSON.
-        return null;
+ */
-    }
+WebStorageStore.prototype.scrollback = function(room, limit) {
-
+    return [];
-    // TODO
-    //setMaxHistoryPerRoom: function(maxHistory) {},
-
-    // TODO
-    //reapOldMessages: function() {},
 };
 
 /** Web Storage Store class. */