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<title>[2135] 2013/frederickding/importer/trunk/class-wordpress-importer.php: Separate reading authors from WXR data from mapping users; see #327.</title>
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<dt>Revision</dt> <dd><a href="http://gsoc.trac.wordpress.org/changeset/2135">2135</a></dd>
<dt>Author</dt> <dd>frederick.ding</dd>
<dt>Date</dt> <dd>2013-07-18 21:52:27 +0000 (Thu, 18 Jul 2013)</dd>
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<h3>Log Message</h3>
<pre>Separate reading authors from WXR data from mapping users; see <a href="http://gsoc.trac.wordpress.org/ticket/327">#327</a>.

- Also add an advance() method for going to another step</pre>

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

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<h3>Diff</h3>
<a id="2013frederickdingimportertrunkclasswordpressimporterphp"></a>
<div class="modfile"><h4>Modified: 2013/frederickding/importer/trunk/class-wordpress-importer.php (2134 => 2135)</h4>
<pre class="diff"><span>
<span class="info">--- 2013/frederickding/importer/trunk/class-wordpress-importer.php   2013-07-18 21:52:14 UTC (rev 2134)
+++ 2013/frederickding/importer/trunk/class-wordpress-importer.php      2013-07-18 21:52:27 UTC (rev 2135)
</span><span class="lines">@@ -102,6 +102,9 @@
</span><span class="cx">                          switch ( $this->progress[$file] ) {
</span><span class="cx">                                  case 'start':
</span><span class="cx">                                  case 'authors':
</span><ins>+                                               $this->process_authors();
+                                               break;
+                                       case 'author_mappings':
</ins><span class="cx">                                           $this->process_author_mappings();
</span><span class="cx">                                          break;
</span><span class="cx">                                  case 'categories':
</span><span class="lines">@@ -155,6 +158,93 @@
</span><span class="cx">  }
</span><span class="cx"> 
</span><span class="cx">  /**
</span><ins>+        * Advances the progress state to the specified state.
+        * 
+        * @param string $step          
+        * @return boolean|WP_Error
+        */
+       public function advance( $step = '' ) {
+               $steps = array( 
+                               'start',
+                               'authors',
+                               'author_mappings',
+                               'categories',
+                               'tags',
+                               'terms',
+                               'attachments',
+                               'posts',
+                               'backfill_parents',
+                               'backfill_urls',
+                               'finish' 
+               );
+                       // if no step provided, advance to the next step
+               if ( empty( $step ) && ! empty( $this->wxr_file ) ) {
+                       if ( ! isset( $this->progress[$this->wxr_file] ) ) {
+                               // process hasn't yet started; start it
+                               $step = $steps[0];
+                       } elseif ( $step_index = array_search( 
+                                       $this->progress[$this->wxr_file], $steps ) ) {
+                               if ( $step_index === 0 )
+                                       $step_index ++;
+                               if ( $step_index < count( $steps ) )
+                                       $step = $steps[$step_index + 1];
+                       }
+               }
+               if ( ! in_array( $step, $steps ) ) {
+                       return new WP_Error( 'import_cron_step_error', 
+                                       __( 'Invalid step', 'wordpress-importer' ) );
+               }
+               $this->progress[$this->wxr_file] = $step;
+               return $step;
+       }
+
+       /**
+        * do_parse() must first be called successfully before this can be used.
+        * 
+        * Like all process_* methods, this will return true when its step has 
+        * completed.
+        * 
+        * @return boolean True upon completion, false otherwise, if an error has occurred
+        */
+       protected function process_authors() {
+               // check for availability of data
+               if ( empty( $this->wxr_file ) || empty( $this->_data ) ) {
+                       $this->error = new WP_Error( 'import_process_wxr_error', 
+                                       __( 'No parsed data available for processing', 
+                                                       'wordpress-importer' ) );
+                       return false;
+               }
+               
+               if ( ! empty( $this->_data['authors'] ) ) {
+                       $this->authors = $this->_data['authors'];
+               } else {
+                       // no author information, grab it from the posts
+                       foreach ( $this->_['posts'] as $post ) {
+                               $login = sanitize_user( $post['post_author'], true );
+                               if ( empty( $login ) ) {
+                                       $this->warnings[] = new WP_Error( 
+                                                       'import_process_authors_warning', 
+                                                       __( 
+                                                                       'Failed to import author %s. Their posts will be attributed to the current user.', 
+                                                                       'wordpress-importer' ), 
+                                                       esc_html( $post['post_author'] ) );
+                                       continue;
+                               }
+                               
+                               if ( ! isset( $this->authors[$login] ) )
+                                       $this->authors[$login] = array( 
+                                                       'author_login' => $login,
+                                                       'author_display_name' => $post['post_author'] 
+                                       );
+                       }
+               }
+               
+               // done without fatal errors, so we'll advance step
+               $this->advance();
+               return true;
+       }
+       
+       /**
</ins><span class="cx">    *
</span><span class="cx">   * @todo
</span><span class="cx">   */
</span></span></pre>
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