gistfile1.js

/*
  Display CloudApp images inline.

  This responder illustrates using Propane's requestJSON service to request
  JSON from remote (non-authenticated) servers and have the results passed
  to a callback of your choosing.
*/


  Campfire.CloudAppExpander = Class.create({
    initialize: function(chat) {
      this.chat = chat;
      var messages = this.chat.transcript.messages;
      for (var i = 0; i < messages.length; i++) {
        this.detectCloudAppURL(messages[i]);
      }
    },

    detectCloudAppURL: function(message) {
      /* we are going to use the messageID to uniquely identify our requestJSON request
         so we don't check pending messages */
      if (!message.pending() && message.kind === 'text') {
        var links = message.bodyElement().select('a:not(image)');
        if (links.length != 1) {
          return;
        }
        var href = links[0].getAttribute('href');
        var match = href.match(/^https?:\/\/(cl.ly|cloud.fousa.be)\/(image\/)?[A-Za-z0-9]+\/?$/);
        if (!match) return;
        window.propane.requestJSON(message.id(), href, 'window.chat.cloudappexpander', 'onEmbedDataLoaded', 'onEmbedDataFailed');
      }
    },

    onEmbedDataLoaded: function(messageID, data) {
      var message = window.chat.transcript.getMessageById(messageID);
      if (!message) return;

      if (data['item_type'] === 'image') {
        var imageURL = data['content_url'];
        message.resize((function() {
          message.bodyCell.insert({bottom: '<div style="width:100%; margin-top:5px; padding-top: 5px; border-top:1px dotted #ccc;"><a href="'+imageURL+'" class="image loading" target="_blank">' + '<img src="'+imageURL+'" onload="$dispatch(&quot;inlineImageLoaded&quot;, this)" onerror="$dispatch(&quot;inlineImageLoadFailed&quot;, this)" /></a></div>'});
        }).bind(this));
      }
    },

    onEmbedDataFailed: function(messageID) {
      /* No cleanup required, we only alter the HTML after we get back a succesful load from the data */
    },

    onMessagesInsertedBeforeDisplay: function(messages) {
      for (var i = 0; i < messages.length; i++) {
        this.detectCloudAppURL(messages[i]);
      }
    },

    onMessageAccepted: function(message, messageID) {
      this.detectCloudAppURL(message);
    }
  });

  Campfire.Responders.push("CloudAppExpander");
  window.chat.installPropaneResponder("CloudAppExpander", "cloudappexpander");