signal-desktop/js/views/message_view.js

/* vim: ts=4:sw=4:expandtab
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
(function () {
  'use strict';

  var AttachmentView = Backbone.View.extend({
    tagName:   "img",
    encode: function  () {
        return new Promise(function(resolve, reject) {
            var blob = new Blob([this.model.data], { type: this.model.contentType });
            var FR = new FileReader();
            FR.onload = function(e) {
                resolve(e.target.result);
            };
            FR.onerror = reject;
            FR.readAsDataURL(blob);
        }.bind(this));
    },
    render: function() {
        this.encode().then(function(base64) {
            this.$el.attr('src', base64);
            this.$el.trigger('update');
        }.bind(this));
        return this;
    }
  });

  window.Whisper = window.Whisper || {};

  Whisper.MessageView = Backbone.View.extend({
    tagName:   "li",
    className: "entry",

    initialize: function() {
      this.$el.addClass(this.model.get('type'));

      this.template = $('#message').html();
      Mustache.parse(this.template);

      this.listenTo(this.model, 'change',  this.render); // auto update
      this.listenTo(this.model, 'destroy', this.remove); // auto update

    },

    render: function() {
        this.$el.html(
          Mustache.render(this.template, {
            message: this.model.get('body'),
            timestamp: moment(this.model.get('timestamp')).fromNow(),
            bubble_class: this.model.get('type') === 'outgoing' ? 'sent' : 'incoming',
            sender: this.model.get('sender')
          })
        );

        this.$el.find('.attachments').append(
            this.model.get('attachments').map(function(attachment) {
                return new AttachmentView({model: attachment}).render().el;
            })
        );

        return this;
    }

  });

})();