getting-started-example/index.html at master · collaborativejs/getting-started-example · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <title>Getting Started with Collaborative.js</title>
    <style>
        textarea {
            width: 600px;
            height: 200px;
            margin-top: 10px;
        }
    </style>
</head>
<body>
<div>
    Use this link to open the document in a separate window or share it with friend:
    <br />
    <a id="share-link" href="#" target="_blank"></a>
</div>
<textarea id="text-area"></textarea>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="/collaborative.min.js"></script>
<script>
  // {{site}} token is replaced by the server with the site data during the page rendering
  // For details, see '/document/:id?' endpoint at index.js file
  var site = '{{site}}';
  var updateDocumentUrl = '/' + site.document.id + '/update';

  // These calls are utility ones and are not related to the Collaborative.js functionality
  updatePageUrl();
  renderSharingLink();

  // Creates Collaborative.js string document using initial data from the server
  var stringDocument = new clv.string.Document(
      site.id,
      site.document.execOrder,
      site.document.context
  );

  // Creates Collaborative.js net object
  var net = new clv.net.Http();
  net.setSendingFn(sendingFunc);

  // start sending with default interval 1000ms
  net.start();

  // Sets initial document value to the textarea control and binds changes handling function
  var $textArea = $('#text-area');
  $textArea.val(site.document.data);
  $textArea.bind('input propertychange', textAreaValueChangeHandler);

  /**
   * On each change event, generates Collaborative.js operations using the difference between
   * the textarea control value and the text stored in the site data object.
   * Generated operations are used to update local site data and are sent to the server.
   */
  function textAreaValueChangeHandler() {
    var ops = clv.string.genOps(site.document.data, $textArea.val());
    var tuple = stringDocument.commit(ops);
    var value = clv.string.exec(site.document.data, tuple.toExec);

    site.document.data = value;
    $textArea.val(value);
    net.send(stringDocument.getExecOrder(), tuple.toSend);
  }

  /**
   * Renders a sharing link, so you can play around with the demo in two separate windows or
   * share it with a friend.
   */
  function renderSharingLink() {
    var $shareLink = $('#share-link');
    $shareLink.attr('href', document.location.href);
    $shareLink.html(document.location.href);
  }

  /**
   * Updates page URL with document id, so you may copy page URL from the browser address bar
   * to open it in a separate window or share it with a friend.
   */
  function updatePageUrl() {
    var path = '/' + site.document.id;
    if (window.location.pathname !== path) {
      if (history) history.replaceState(null, null, path);
      else window.location.replace(path);
    }
  }

  /**
   * This is a temporary function, it will be replaced with XhrIO implementation ASAP.
   */
  function sendingFunc(execOrder, updates, callback) {
    var data = {execOrder: execOrder, updates: updates};

    $.ajax({
      url: updateDocumentUrl,
      type: 'POST',
      data: JSON.stringify(data),
      dataType: 'json',
      contentType: 'application/json',
      success: function(data) {
        var otherSitesUpdates = data.updates;
        if (otherSitesUpdates) {
          var tuple = stringDocument.update(otherSitesUpdates);
          site.document.data = clv.string.exec(site.document.data, tuple.toExec);
          $textArea.val(site.document.data);
        }
        callback(true, stringDocument.getExecOrder(), otherSitesUpdates);
      },
      error: function(data) {
        callback(false);
        console.log('Fail to update document\n' + data.status + ', ' + data.responseText);
      }
    });
  }
</script>
</body>
</html>