Update to Drupal 8.0.0 beta 14. For more information, see https://drupal.org/node/2544542

core/modules/tracker/js/tracker-history.js

@@ -0,0 +1,122 @@
+/**
+ * Attaches behaviors for the Tracker module's History module integration.
+ *
+ * May only be loaded for authenticated users, with the History module enabled.
+ */
+(function ($, Drupal, window) {
+
+  "use strict";
+
+  /**
+   * Render "new" and "updated" node indicators, as well as "X new" replies links.
+   */
+  Drupal.behaviors.trackerHistory = {
+    attach: function (context) {
+      // Find all "new" comment indicator placeholders newer than 30 days ago that
+      // have not already been read after their last comment timestamp.
+      var nodeIDs = [];
+      var $nodeNewPlaceholders = $(context)
+        .find('[data-history-node-timestamp]')
+        .once('history')
+        .filter(function () {
+          var nodeTimestamp = parseInt(this.getAttribute('data-history-node-timestamp'), 10);
+          var nodeID = this.getAttribute('data-history-node-id');
+          if (Drupal.history.needsServerCheck(nodeID, nodeTimestamp)) {
+            nodeIDs.push(nodeID);
+            return true;
+          }
+          else {
+            return false;
+          }
+        });
+
+      // Find all "new" comment indicator placeholders newer than 30 days ago that
+      // have not already been read after their last comment timestamp.
+      var $newRepliesPlaceholders = $(context)
+        .find('[data-history-node-last-comment-timestamp]')
+        .once('history')
+        .filter(function () {
+          var lastCommentTimestamp = parseInt(this.getAttribute('data-history-node-last-comment-timestamp'), 10);
+          var nodeTimestamp = parseInt(this.previousSibling.previousSibling.getAttribute('data-history-node-timestamp'), 10);
+          // Discard placeholders that have zero comments.
+          if (lastCommentTimestamp === nodeTimestamp) {
+            return false;
+          }
+          var nodeID = this.previousSibling.previousSibling.getAttribute('data-history-node-id');
+          if (Drupal.history.needsServerCheck(nodeID, lastCommentTimestamp)) {
+            if (nodeIDs.indexOf(nodeID) === -1) {
+              nodeIDs.push(nodeID);
+            }
+            return true;
+          }
+          else {
+            return false;
+          }
+        });
+
+      if ($nodeNewPlaceholders.length === 0 && $newRepliesPlaceholders.length === 0) {
+        return;
+      }
+
+      // Fetch the node read timestamps from the server.
+      Drupal.history.fetchTimestamps(nodeIDs, function () {
+        processNodeNewIndicators($nodeNewPlaceholders);
+        processNewRepliesIndicators($newRepliesPlaceholders);
+      });
+    }
+  };
+
+  function processNodeNewIndicators($placeholders) {
+    var newNodeString = Drupal.t('new');
+    var updatedNodeString = Drupal.t('updated');
+
+    $placeholders.each(function (index, placeholder) {
+      var timestamp = parseInt(placeholder.getAttribute('data-history-node-timestamp'), 10);
+      var nodeID = placeholder.getAttribute('data-history-node-id');
+      var lastViewTimestamp = Drupal.history.getLastRead(nodeID);
+
+      if (timestamp > lastViewTimestamp) {
+        var message = (lastViewTimestamp === 0) ? newNodeString : updatedNodeString;
+        $(placeholder).append('<span class="marker">' + message + '</span>');
+      }
+    });
+  }
+
+  function processNewRepliesIndicators($placeholders) {
+    // Figure out which placeholders need the "x new" replies links.
+    var placeholdersToUpdate = {};
+    $placeholders.each(function (index, placeholder) {
+      var timestamp = parseInt(placeholder.getAttribute('data-history-node-last-comment-timestamp'), 10);
+      var nodeID = placeholder.previousSibling.previousSibling.getAttribute('data-history-node-id');
+      var lastViewTimestamp = Drupal.history.getLastRead(nodeID);
+
+      // Queue this placeholder's "X new" replies link to be downloaded from the
+      // server.
+      if (timestamp > lastViewTimestamp) {
+        placeholdersToUpdate[nodeID] = placeholder;
+      }
+    });
+
+    // Perform an AJAX request to retrieve node view timestamps.
+    var nodeIDs = Object.keys(placeholdersToUpdate);
+    if (nodeIDs.length === 0) {
+      return;
+    }
+    $.ajax({
+      url: Drupal.url('comments/render_new_comments_node_links'),
+      type: 'POST',
+      data: {'node_ids[]': nodeIDs},
+      dataType: 'json',
+      success: function (results) {
+        for (var nodeID in results) {
+          if (results.hasOwnProperty(nodeID) && placeholdersToUpdate.hasOwnProperty(nodeID)) {
+            var url = results[nodeID].first_new_comment_link;
+            var text = Drupal.formatPlural(results[nodeID].new_comment_count, '1 new', '@count new');
+            $(placeholdersToUpdate[nodeID]).append('<br /><a href="' + url + '">' + text + '</a>');
+          }
+        }
+      }
+    });
+  }
+
+})(jQuery, Drupal, window);