Upload files and images

src/ContentMessages.js

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+/*
+Copyright 2015 OpenMarket Ltd
+
+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';
+
+var q = require('q');
+var extend = require('./extend');
+
+function infoForImageFile(imageFile) {
+    var deferred = q.defer();
+
+    // Load the file into an html element
+    var img = document.createElement("img");
+
+    var reader = new FileReader();
+    reader.onload = function(e) {
+        img.src = e.target.result;
+
+        // Once ready, returns its size
+        img.onload = function() {
+            deferred.resolve({
+                w: img.width,
+                h: img.height
+            });
+        };
+        img.onerror = function(e) {
+            deferred.reject(e);
+        };
+    };
+    reader.onerror = function(e) {
+        deferred.reject(e);
+    };
+    reader.readAsDataURL(imageFile);
+
+    return deferred.promise;
+}
+
+function sendContentToRoom(file, roomId, matrixClient) {
+    var content = {
+        body: file.name,
+        info: {
+            size: file.size,
+            mimetype: file.type
+        }
+    };
+
+    var def = q.defer();
+    if (file.type.indexOf('image/') == 0) {
+        content.msgtype = 'm.image';
+        infoForImageFile(file).then(function(imageInfo) {
+            extend(content.info, imageInfo);
+            def.resolve();
+        });
+    } else {
+        content.msgtype = 'm.file';
+        def.resolve();
+    }
+
+    return def.promise.then(function() {
+        return matrixClient.uploadContent(file);
+    }).then(function(url) {
+        content.url = url;
+        return matrixClient.sendMessage(roomId, content);
+    });
+}
+
+module.exports = {
+    sendContentToRoom: sendContentToRoom
+};