Basic frontend support for image attachments

index.html

@@ -38,7 +38,9 @@
                 <div class='message-composer'>
                     <form class='send'>
                         <input class='send-message' rows='6' type='textarea'>
-                        <div class='attachments'> Add Files </div>
+                        <div class='attachments'>
+                          <input type='file' name='files[]' multiple class='file-input'>
+                        </div>
                     </form>
                 </div>
                 <div class='extension-details'>
@@ -143,6 +145,7 @@
 
         <script type="text/javascript" src="js/chromium.js"></script>
         <script type="text/javascript" src="js/views/notifications.js"></script>
+        <script type="text/javascript" src="js/views/file_input_view.js"></script>
         <script type="text/javascript" src="js/views/list_view.js"></script>
         <script type="text/javascript" src="js/views/message_view.js"></script>
         <script type="text/javascript" src="js/views/message_list_view.js"></script>

js/models/threads.js

@@ -21,7 +21,7 @@ var Whisper = Whisper || {};
       if (missing.length) { return "Thread must have " + missing; }
     },
 
-    sendMessage: function(message) {
+    sendMessage: function(message, attachments) {
       var timestamp = Date.now();
 
       this.messages().add({ type: 'outgoing',
@@ -34,10 +34,10 @@ var Whisper = Whisper || {};
                   active:      true});
 
       if (this.get('type') == 'private') {
-        var promise = textsecure.messaging.sendMessageToNumber(this.get('id'), message, []);
+        var promise = textsecure.messaging.sendMessageToNumber(this.get('id'), message, attachments)
       }
       else {
-        var promise = textsecure.messaging.sendMessageToGroup(this.get('groupId'), message, []);
+        var promise = textsecure.messaging.sendMessageToGroup(this.get('groupId'), message, attachments);
       }
       promise.then(
         function(result) {

js/views/conversation_view.js

@@ -14,6 +14,8 @@ var Whisper = Whisper || {};
       this.view = new Whisper.MessageListView({collection: this.model.messages()});
       this.listenTo(this.model.messages(), 'add', this.scrollToBottom);
 
+      this.fileInput = new Whisper.FileInputView({el: this.$el.find('.attachments')});
+
       this.model.messages().fetch({reset: true});
       this.$el.find('.discussion-container').append(this.view.el);
       window.addEventListener('storage', (function(){
@@ -28,8 +30,13 @@ var Whisper = Whisper || {};
     sendMessage: function(e) {
       e.preventDefault();
       var input = this.$el.find('.send input');
-      if (input.val().length > 0) {
-        this.model.sendMessage(input.val());
+      var message = input.val();
+      var thread = this.model;
+
+      if (message.length > 0 || this.fileInput.hasFiles()) {
+        this.fileInput.getFiles().then(function(attachments) {
+          thread.sendMessage(message, attachments);
+        });
         input.val("");
       }
     },

js/views/file_input_view.js

@@ -0,0 +1,55 @@
+var Whisper = Whisper || {};
+
+(function () {
+    'use strict';
+    Whisper.FileInputView = Backbone.View.extend({
+        tagName: 'span',
+        className: 'file-input',
+        initialize: function() {
+            this.$input = this.$el.find('input[type=file]');
+        },
+
+        events: {
+            'change': 'previewImages'
+        },
+
+        addThumb: function(e) {
+          this.$el.append($('<img>').attr( "src", e.target.result ));
+        },
+
+        previewImages: function() {
+            this.$el.find('img').remove();
+            var files = this.$input.prop('files');
+            var onload = this.addThumb.bind(this);
+            for (var i = 0; i < files.length; i++) {
+                var FR = new FileReader();
+                FR.onload = onload;
+                FR.readAsDataURL(files[i]);
+            }
+        },
+
+        hasFiles: function() {
+            var files = this.$input.prop('files');
+            return files && files.length && files.length > 0;
+        },
+
+        getFiles: function() {
+            var promises = [];
+            var files = this.$input.prop('files');
+            for (var i = 0; i < files.length; i++) {
+                var contentType = files[i].type;
+                var p = new Promise(function(resolve, reject) {
+                  var FR = new FileReader();
+                  FR.onload = function(e) {
+                    resolve({data: e.target.result, contentType: contentType});
+                  };
+                  FR.readAsArrayBuffer(files[i]);
+                }.bind(this));
+                promises.push(p);
+            }
+            this.$el.find('img').remove();
+            return Promise.all(promises);
+        }
+
+    });
+})();

stylesheets/index.css

@@ -56,3 +56,8 @@ li.entry .avatar {
 li.entry.outgoing .avatar {
   display: none;
 }
+
+.attachments img {
+  width: 30px;
+  height: 30px;
+}