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<title>[2176] 2013/frederickding/importer/trunk/class-wordpress-importer.php: Add URL backfill and featured images remapping; see #327.</title>
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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://gsoc.trac.wordpress.org/changeset/2176">2176</a></dd>
<dt>Author</dt> <dd>frederick.ding</dd>
<dt>Date</dt> <dd>2013-07-29 19:57:46 +0000 (Mon, 29 Jul 2013)</dd>
</dl>

<h3>Log Message</h3>
<pre>Add URL backfill and featured images remapping; see <a href="http://gsoc.trac.wordpress.org/ticket/327">#327</a>.

- URL backfill step will honour cron `$this->have_time()`; as of right now,
  only `process_posts()` and `process_urls()` check for time left</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#2013frederickdingimportertrunkclasswordpressimporterphp">2013/frederickding/importer/trunk/class-wordpress-importer.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="2013frederickdingimportertrunkclasswordpressimporterphp"></a>
<div class="modfile"><h4>Modified: 2013/frederickding/importer/trunk/class-wordpress-importer.php (2175 => 2176)</h4>
<pre class="diff"><span>
<span class="info">--- 2013/frederickding/importer/trunk/class-wordpress-importer.php   2013-07-29 19:29:18 UTC (rev 2175)
+++ 2013/frederickding/importer/trunk/class-wordpress-importer.php      2013-07-29 19:57:46 UTC (rev 2176)
</span><span class="lines">@@ -299,6 +299,9 @@
</span><span class="cx">                                  case 'urls':
</span><span class="cx">                                          $this->process_urls();
</span><span class="cx">                                          break;
</span><ins>+                                       case 'featured_images':
+                                               $this->process_featured_images();
+                                               break;
</ins><span class="cx">                                   case 'finish':
</span><span class="cx">                                  default:
</span><span class="cx">                                          $done = true;
</span><span class="lines">@@ -361,6 +364,7 @@
</span><span class="cx">                          'posts',
</span><span class="cx">                          'parents',
</span><span class="cx">                          'urls',
</span><ins>+                               'featured_images',
</ins><span class="cx">                           'finish'
</span><span class="cx">          );
</span><span class="cx"> 
</span><span class="lines">@@ -1267,10 +1271,77 @@
</span><span class="cx">  }
</span><span class="cx"> 
</span><span class="cx">  /**
</span><ins>+        * Remaps attachment URLs to the new location.
</ins><span class="cx">    *
</span><del>-        * @todo
</del><ins>+         * @todo Use some form of WP_Relocate instead of directly querying SQL
+        * @global $wpdb
+        * @return boolean True if completed, false if the process must continue in
+        *         the next cron run
</ins><span class="cx">    */
</span><span class="cx">  protected function process_urls() {
</span><ins>+               global $wpdb;
+
+               if ( $this->get_param( 'sorted_processed_url_remap', false ) === false ) {
+                       // only sort once!
+                       uksort( $this->processed_url_remap,
+                                       array(
+                                                       get_class( $this ),
+                                                       'compare_strlen'
+                                       ) );
+                       $this->set_param( 'sorted_processed_url_remap', true );
+               }
+
+               // use an iterator object with which we can track state
+               if ( ! ($iterator = $this->get_param( 'process_urls_iterator', null ) instanceof ArrayIterator) )
+                       $iterator = new ArrayIterator( $this->processed_url_remap );
+
+                       // make sure we do the longest urls first, in case one is a
+               // substring of another
+               foreach ( $iterator as $from_url => $to_url ) {
+                       // remap urls in post_content
+                       $wpdb->query(
+                                       $wpdb->prepare(
+                                                       "UPDATE {$wpdb->posts} SET post_content = REPLACE(post_content, %s, %s)",
+                                                       $from_url, $to_url ) );
+                       // remap enclosure urls
+                       $result = $wpdb->query(
+                                       $wpdb->prepare(
+                                                       "UPDATE {$wpdb->postmeta} SET meta_value = REPLACE(meta_value, %s, %s) WHERE meta_key='enclosure'",
+                                                       $from_url, $to_url ) );
+
+                       // stop execution if we've reached the end of this cron run's
+                       // limit
+                       if ( ! $this->have_time() )
+                               break;
+               }
+
+               // only unset after all posts have gone through the foreach
+               if ( ! $iterator->valid() ) {
+                       // done
+                       $this->unset_param( 'process_urls_iterator' );
+                       $this->advance();
+                       return true;
+               }
+
+               // save the state of our iterator
+               $this->set_param( 'process_urls_iterator', $iterator );
+               return false;
+       }
+
+       /**
+        * Updates _thumbnail_id meta to new, imported attachment IDs.
+        */
+       protected function process_featured_images() {
+           // cycle through posts that have a featured image
+           foreach ( $this->processed_featured_images as $post_id => $value ) {
+               if ( isset( $this->processed_posts[$value] ) ) {
+                   $new_id = $this->processed_posts[$value];
+                   // only update if there's a difference
+                   if ( $new_id != $value )
+                       update_post_meta( $post_id, '_thumbnail_id', $new_id );
+               }
+           }
+
</ins><span class="cx">       $this->advance();
</span><span class="cx">      return true;
</span><span class="cx">  }
</span><span class="lines">@@ -1525,4 +1596,15 @@
</span><span class="cx">  public function get_all_params () {
</span><span class="cx">          return $this->params;
</span><span class="cx">  }
</span><ins>+
+       /**
+        * Subtracts the lengths of two strings.
+        *
+        * @param string $a
+        * @param string $b
+        * @return int The difference in their lengths
+        */
+       static function compare_strlen( $a, $b ) {
+               return strlen( $b ) - strlen( $a );
+       }
</ins><span class="cx"> }
</span><span class="cx">\ No newline at end of file
</span></span></pre>
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