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| 1 | <?php |
| 2 | /** |
| 3 | * Meta sync module. |
| 4 | * |
| 5 | * @package automattic/jetpack-sync |
| 6 | */ |
| 7 | |
| 8 | namespace Automattic\Jetpack\Sync\Modules; |
| 9 | |
| 10 | if ( ! defined( 'ABSPATH' ) ) { |
| 11 | exit( 0 ); |
| 12 | } |
| 13 | |
| 14 | /** |
| 15 | * Class to handle sync for meta. |
| 16 | */ |
| 17 | class Meta extends Module { |
| 18 | /** |
| 19 | * Sync module name. |
| 20 | * |
| 21 | * @access public |
| 22 | * |
| 23 | * @return string |
| 24 | */ |
| 25 | public function name() { |
| 26 | return 'meta'; |
| 27 | } |
| 28 | |
| 29 | /** |
| 30 | * This implementation of get_objects_by_id() is a bit hacky since we're not passing in an array of meta IDs, |
| 31 | * but instead an array of post or comment IDs for which to retrieve meta for. On top of that, |
| 32 | * we also pass in an associative array where we expect there to be 'meta_key' and 'ids' keys present. |
| 33 | * |
| 34 | * This seemed to be required since if we have missing meta on WP.com and need to fetch it, we don't know what |
| 35 | * the meta key is, but we do know that we have missing meta for a given post or comment. |
| 36 | * |
| 37 | * @todo Refactor the $wpdb->prepare call to use placeholders. |
| 38 | * |
| 39 | * @param string $object_type The type of object for which we retrieve meta. Either 'post' or 'comment'. |
| 40 | * @param array $config Must include 'meta_key' and 'ids' keys. |
| 41 | * |
| 42 | * @return array |
| 43 | */ |
| 44 | public function get_objects_by_id( $object_type, $config ) { |
| 45 | global $wpdb; |
| 46 | |
| 47 | $table = _get_meta_table( $object_type ); |
| 48 | |
| 49 | if ( ! $table ) { |
| 50 | return array(); |
| 51 | } |
| 52 | |
| 53 | if ( ! is_array( $config ) ) { |
| 54 | return array(); |
| 55 | } |
| 56 | |
| 57 | $object_id_column = $object_type . '_id'; |
| 58 | $object_key_pairs = array(); |
| 59 | |
| 60 | foreach ( $config as $item ) { |
| 61 | if ( isset( $item['id'] ) && isset( $item['meta_key'] ) ) { |
| 62 | $object_key_pairs[ (int) $item['id'] ][] = (string) $item['meta_key']; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | $meta_objects = array(); |
| 67 | $where_sql = ''; |
| 68 | $current_query_length = 0; |
| 69 | |
| 70 | foreach ( $object_key_pairs as $object_id => $keys ) { |
| 71 | $keys_placeholders = implode( ',', array_fill( 0, count( $keys ), '%s' ) ); |
| 72 | $where_condition = trim( |
| 73 | $wpdb->prepare( |
| 74 | // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared |
| 75 | "( `$object_id_column` = %d AND meta_key IN ( $keys_placeholders ) )", |
| 76 | array_merge( array( $object_id ), $keys ) |
| 77 | ) |
| 78 | ); |
| 79 | |
| 80 | $where_sql = empty( $where_sql ) ? $where_condition : $where_sql . ' OR ' . $where_condition; |
| 81 | |
| 82 | $current_query_length += strlen( $where_sql ); |
| 83 | |
| 84 | if ( $current_query_length > self::MAX_DB_QUERY_LENGTH ) { |
| 85 | $meta_objects = $this->fetch_prepared_meta_from_db( $object_type, $where_sql, $meta_objects ); |
| 86 | $where_sql = ''; |
| 87 | $current_query_length = 0; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | if ( ! empty( $where_sql ) ) { |
| 92 | $meta_objects = $this->fetch_prepared_meta_from_db( $object_type, $where_sql, $meta_objects ); |
| 93 | } |
| 94 | |
| 95 | return $meta_objects; |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * Get a single Meta Result. |
| 100 | * |
| 101 | * @param string $object_type post, comment, term, user. |
| 102 | * @param int|null $id Object ID. |
| 103 | * @param string|null $meta_key Meta Key. |
| 104 | * |
| 105 | * @return mixed|null |
| 106 | */ |
| 107 | public function get_object_by_id( $object_type, $id = null, $meta_key = null ) { |
| 108 | global $wpdb; |
| 109 | |
| 110 | if ( ! is_int( $id ) || ! is_string( $meta_key ) ) { |
| 111 | return null; |
| 112 | } |
| 113 | |
| 114 | $table = _get_meta_table( $object_type ); |
| 115 | |
| 116 | if ( ! $table ) { |
| 117 | return null; |
| 118 | } |
| 119 | |
| 120 | $object_id_column = $object_type . '_id'; |
| 121 | |
| 122 | // Sanitize so that the array only has integer values. |
| 123 | $where_condition = $wpdb->prepare( |
| 124 | // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared |
| 125 | "{$object_id_column} = %d AND meta_key = %s", |
| 126 | $id, |
| 127 | $meta_key |
| 128 | ); |
| 129 | |
| 130 | $meta_objects = $this->fetch_prepared_meta_from_db( $object_type, $where_condition ); |
| 131 | |
| 132 | $key = $id . '-' . $meta_key; |
| 133 | |
| 134 | return $meta_objects[ $key ] ?? null; |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Fetch meta from DB and return them in a standard format. |
| 139 | * |
| 140 | * @param string $object_type The meta object type, eg 'post', 'user' etc. |
| 141 | * @param string $where Prepared SQL 'where' statement. |
| 142 | * @param array $meta_objects An existing array of meta to populate. Defaults to an empty array. |
| 143 | * @return array |
| 144 | */ |
| 145 | private function fetch_prepared_meta_from_db( $object_type, $where, $meta_objects = array() ) { |
| 146 | global $wpdb; |
| 147 | |
| 148 | $table = _get_meta_table( $object_type ); |
| 149 | $object_id_column = $object_type . '_id'; |
| 150 | |
| 151 | $meta = $wpdb->get_results( // phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.DirectDatabaseQuery.DirectQuery |
| 152 | // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared |
| 153 | "SELECT * FROM {$table} WHERE {$where}", |
| 154 | ARRAY_A |
| 155 | ); |
| 156 | |
| 157 | if ( ! is_wp_error( $meta ) && ! empty( $meta ) ) { |
| 158 | foreach ( $meta as $meta_entry ) { |
| 159 | $object_id = $meta_entry[ $object_id_column ]; |
| 160 | $meta_key = $meta_entry['meta_key']; |
| 161 | $key = $object_id . '-' . $meta_key; |
| 162 | |
| 163 | if ( ! isset( $meta_objects[ $key ] ) ) { |
| 164 | $meta_objects[ $key ] = array(); |
| 165 | } |
| 166 | |
| 167 | $meta_objects[ $key ][] = $this->get_prepared_meta_object( $object_type, $meta_entry ); |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | return $meta_objects; |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * Accepts a DB meta entry and returns it in a standard format. |
| 176 | * |
| 177 | * @param string $object_type The meta object type, eg 'post', 'user' etc. |
| 178 | * @param array $meta_entry A meta array. |
| 179 | * @return array |
| 180 | */ |
| 181 | private function get_prepared_meta_object( $object_type, $meta_entry ) { |
| 182 | $object_id_column = $object_type . '_id'; |
| 183 | |
| 184 | if ( 'post' === $object_type && strlen( $meta_entry['meta_value'] ) >= Posts::MAX_META_LENGTH ) { |
| 185 | $meta_entry['meta_value'] = ''; |
| 186 | } |
| 187 | |
| 188 | return array( |
| 189 | 'meta_type' => $object_type, |
| 190 | 'meta_id' => $meta_entry['meta_id'], |
| 191 | 'meta_key' => $meta_entry['meta_key'], |
| 192 | 'meta_value' => $meta_entry['meta_value'], |
| 193 | 'object_id' => $meta_entry[ $object_id_column ], |
| 194 | ); |
| 195 | } |
| 196 | } |