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<?php |
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/** |
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* This class does a full resync of the database by |
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* enqueuing an outbound action for every single object |
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* that we care about. |
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* |
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* This class contains a few non-obvious optimisations that should be explained: |
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* - we fire an action called jp_full_sync_start so that WPCOM can erase the contents of the cached database |
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* - for each object type, we obtain a full list of object IDs to sync via a single API call (hoping that since they're ints, they can all fit in RAM) |
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* - we load the full objects for those IDs in chunks of Jetpack_Sync_Full::$array_chunk_size (to reduce the number of MySQL calls) |
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* - we fire a trigger for the entire array which the Jetpack_Sync_Client then serializes and queues. |
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*/ |
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class Jetpack_Sync_Full { |
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static $array_chunk_size = 5; |
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function start() { |
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// TODO |
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do_action( 'jp_full_sync_start' ); |
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$this->enqueue_all_constants(); |
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$this->enqueue_all_posts(); |
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$this->enqueue_all_comments(); |
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} |
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private function enqueue_all_constants() { |
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$client = Jetpack_Sync_Client::getInstance(); |
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$client->force_sync_constants(); |
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} |
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View Code Duplication |
private function enqueue_all_posts() { |
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global $wpdb; |
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// I hope this is never bigger than RAM... |
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$post_ids = $wpdb->get_col( "SELECT id FROM $wpdb->posts"); |
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// Request posts in groups of N for efficiency |
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$chunked_post_ids = array_chunk( $post_ids, self::$array_chunk_size ); |
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// Send each chunk as an array of objects |
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foreach ( $chunked_post_ids as $chunk ) { |
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$posts = get_posts( array( 'post__in' => $chunk, 'post_status' => 'any' ) ); |
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do_action( 'jp_full_sync_posts', $posts ); |
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} |
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} |
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View Code Duplication |
private function enqueue_all_comments() { |
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global $wpdb; |
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$comment_ids = $wpdb->get_col( "SELECT comment_id FROM $wpdb->comments"); |
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$chunked_comment_ids = array_chunk( $comment_ids, self::$array_chunk_size ); |
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foreach ( $chunked_comment_ids as $chunk ) { |
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$comments = get_comments( array( 'comment__in' => $chunk ) ); |
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do_action( 'jp_full_sync_comments', $comments ); |
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} |
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} |
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} |
Automattic /
jetpack
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The PSR-2 coding standard requires that all properties in a class have their visibility explicitly declared. If you declare a property using
the property is implicitly global.
To learn more about the PSR-2, please see the PHP-FIG site on the PSR-2.