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<?php |
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|
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abstract class Red_Database_Upgrader { |
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private $queries = []; |
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private $live = true; |
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|
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/** |
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* Return an array of all the stages for an upgrade |
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* |
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* @return array stage name => reason |
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*/ |
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abstract public function get_stages(); |
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|
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public function get_reason( $stage ) { |
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$stages = $this->get_stages(); |
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|
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if ( isset( $stages[ $stage ] ) ) { |
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return $stages[ $stage ]; |
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} |
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|
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return 'Unknown'; |
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} |
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|
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/** |
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* Run a particular stage on the current upgrader |
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* |
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* @return Red_Database_Status |
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*/ |
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public function perform_stage( Red_Database_Status $status ) { |
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global $wpdb; |
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|
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$stage = $status->get_current_stage(); |
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if ( $this->has_stage( $stage ) && method_exists( $this, $stage ) ) { |
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try { |
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$this->$stage( $wpdb ); |
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$status->set_ok( $this->get_reason( $stage ) ); |
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} catch ( Exception $e ) { |
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$status->set_error( $e->getMessage() ); |
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} |
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} else { |
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$status->set_error( 'No stage found for upgrade ' . $stage ); |
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} |
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} |
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|
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public function get_queries_for_stage( $stage ) { |
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global $wpdb; |
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|
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$this->queries = []; |
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$this->live = false; |
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$this->$stage( $wpdb ); |
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$this->live = true; |
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|
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return $this->queries; |
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} |
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|
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/** |
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* Returns the current database charset |
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* |
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* @return string Database charset |
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*/ |
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public function get_charset() { |
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global $wpdb; |
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|
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$charset_collate = ''; |
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if ( ! empty( $wpdb->charset ) ) { |
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// Fix some common invalid charset values |
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$fixes = [ |
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'utf-8', |
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'utf', |
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]; |
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|
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$charset = $wpdb->charset; |
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if ( in_array( strtolower( $charset ), $fixes, true ) ) { |
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$charset = 'utf8'; |
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} |
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|
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$charset_collate = "DEFAULT CHARACTER SET $charset"; |
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} |
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|
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if ( ! empty( $wpdb->collate ) ) { |
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$charset_collate .= " COLLATE=$wpdb->collate"; |
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} |
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|
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return $charset_collate; |
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} |
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|
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/** |
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* Performs a $wpdb->query, and throws an exception if an error occurs |
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* |
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* @return bool true if query is performed ok, otherwise an exception is thrown |
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*/ |
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protected function do_query( $wpdb, $sql ) { |
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if ( ! $this->live ) { |
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$this->queries[] = $sql; |
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return true; |
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} |
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|
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// These are known queries without user input |
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// phpcs:ignore |
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$result = $wpdb->query( $sql ); |
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|
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if ( $result === false ) { |
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/* translators: 1: SQL string */ |
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throw new Exception( sprintf( __( 'Failed to perform query "%s"' ), $sql ) ); |
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} |
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|
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return true; |
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} |
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|
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/** |
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* Load a database upgrader class |
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* |
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* @return object Database upgrader |
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*/ |
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public static function get( $version ) { |
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include_once dirname( __FILE__ ) . '/schema/' . str_replace( [ '..', '/' ], '', $version['file'] ); |
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|
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return new $version['class']; |
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} |
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|
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private function has_stage( $stage ) { |
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return in_array( $stage, array_keys( $this->get_stages() ), true ); |
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} |
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} |
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