/**
  * Handles static insertion for posts.
  * 
  * @remark            Only category taxonomy allow/deny check is supported. Other types post_tags and custom taxonomies are not supported yet.
  */
 public function doFilterForStaticInsertion($arrPostContent, $arrPostMeta = array())
 {
     // if the publish key exists, it means it is an update
     if (isset($arrPostMeta['save']) && $arrPostMeta['save'] == 'Update') {
         return $arrPostContent;
     }
     // If it's auto-draft saving feature, do nothing.
     if (isset($arrPostContent['post_status']) && $arrPostContent['post_status'] != 'publish') {
         return $arrPostContent;
     }
     // The default disabled post types.
     if (in_array($arrPostContent['post_type'], array(AmazonAutoLinks_Commons::PostTypeSlug, AmazonAutoLinks_Commons::PostTypeSlugAutoInsert, 'revision', 'attachment', 'nav_menu_item'))) {
         return $arrPostContent;
     }
     /*    $arrPostMeta structure
               [ID] => 278
               [post_category] => Array (
                   [0] => 0
                   [1] => 10
                   [2] => 9
                   [3] => 1
               )
               [tax_input] => Array(
                   [post_tag] => test
               )
           */
     $arrSubjectPostInfo = array('post_id' => $arrPostMeta['ID'], 'post_type' => $arrPostContent['post_type'], 'term_ids' => $arrPostMeta['post_category']) + self::$arrStructure_SubjectPageInfo;
     $strPre = '';
     $strPost = '';
     foreach ($this->arrFilterHooks['wp_insert_post_data'] as $intAutoInsertID) {
         if (!$this->isAutoInsertEnabledPage($intAutoInsertID, $arrSubjectPostInfo)) {
             continue;
         }
         $arrAutoInsertOptions = $this->arrAutoInsertOptions[$intAutoInsertID];
         // position - above, below, or both,
         $strPosition = $arrAutoInsertOptions['static_position'];
         if ($strPosition == 'above' || $strPosition == 'both') {
             $oUnits = new AmazonAutoLinks_Units(array('id' => $arrAutoInsertOptions['unit_ids']));
             $strPre .= $oUnits->getOutput();
         }
         if ($strPosition == 'below' || $strPosition == 'both') {
             $oUnits = new AmazonAutoLinks_Units(array('id' => $arrAutoInsertOptions['unit_ids']));
             $strPost .= $oUnits->getOutput();
         }
     }
     $arrPostContent['post_content'] = $strPre . $arrPostContent['post_content'] . $strPost;
     return $arrPostContent;
 }