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<?php |
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|
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// +----------------------------------------------------------------------+ |
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// | Copyright 2013 Madpixels (email : visualizer@madpixels.net) | |
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// +----------------------------------------------------------------------+ |
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// | This program is free software; you can redistribute it and/or modify | |
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// | it under the terms of the GNU General Public License, version 2, as | |
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// | published by the Free Software Foundation. | |
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// | | |
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// | This program is distributed in the hope that it will be useful, | |
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// | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
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// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
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// | GNU General Public License for more details. | |
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// | | |
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// | You should have received a copy of the GNU General Public License | |
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// | along with this program; if not, write to the Free Software | |
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// | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
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// | MA 02110-1301 USA | |
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// +----------------------------------------------------------------------+ |
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// | Author: Eugene Manuilov <eugene@manuilov.org> | |
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// +----------------------------------------------------------------------+ |
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/** |
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* Source manager for query builder. |
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* |
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* @category Visualizer |
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* @package Source |
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*/ |
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class Visualizer_Source_Query_Params extends Visualizer_Source_Query { |
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|
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/** |
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* The params that will form the query. |
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* |
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* @access protected |
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* @var string |
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*/ |
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protected $_params; |
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|
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/** |
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* Constructor. |
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* |
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* @since 1.0.0 |
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* |
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* @access public |
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* @param array $params The params that will form the query. |
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*/ |
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public function __construct( $params = null ) { |
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$this->_params = $params; |
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if ( ! empty( $params ) ) { |
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$this->build_query(); |
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} |
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} |
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|
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/** |
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* Rearrange columns so that a string column, if present, is always first in the select list as this will form the x axis. |
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*/ |
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private function rearrange_columns_for_x_axis( $columns, $select, $tables ) { |
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if ( ! $select ) { |
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return null; |
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} |
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|
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$first = null; |
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$index = 0; |
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foreach ( $select as $column ) { |
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if ( ! is_null( $first ) ) { |
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break; |
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} |
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$table = is_array( $tables ) ? $tables[0] : $tables; |
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$col = $column; |
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if ( 0 !== strpos( $column, 'count(' ) ) { |
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if ( count( $tables ) > 1 ) { |
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$arr = explode( '.', $column ); |
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$table = $arr[0]; |
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$col = $arr[1]; |
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} |
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foreach ( $columns[ $table ] as $table_cols ) { |
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if ( $table_cols['name'] === $column && 'n' !== $table_cols['type'] ) { |
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$first = $column; |
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break; |
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} |
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} |
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} |
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++$index; |
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} |
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|
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if ( $first ) { |
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unset( $select[ --$index ] ); |
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array_unshift( $select, $first ); |
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} |
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|
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return implode( ',', $select ); |
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} |
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|
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/** |
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* Build the final query. |
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* |
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* @access private |
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*/ |
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private function build_query() { |
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$args = $this->_params; |
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|
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do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Building query with params %s', print_r( $args, true ) ), 'debug', __FILE__, __LINE__ ); |
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|
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$table = $args['from']; |
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$tables = array( $table ); |
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$mapping = self::get_db_table_mapping(); |
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if ( array_key_exists( $table, $mapping ) ) { |
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$tables[] = $mapping[ $table ]; |
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} |
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|
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$cols = array(); |
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foreach ( $tables as $table ) { |
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$cols[ $table ] = self::get_db_table_columns( $table, count( $tables ) > 1 ); |
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} |
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|
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if ( ! isset( $args['select'] ) ) { |
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return; |
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} |
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|
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$query = ''; |
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$select = 'SELECT ' . $this->rearrange_columns_for_x_axis( $cols, $args['select'], $tables ); |
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$from = ' FROM ' . vsprintf( implode( ',', array_fill( 0, count( $tables ), '%s' ) ), $tables ); |
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$group = ''; |
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$order = ''; |
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$limit = ''; |
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$fk = ''; |
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$where = array(); |
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|
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if ( isset( $args['group'] ) ) { |
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$group = ' GROUP BY ' . implode( ', ', $args['group'] ); |
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} |
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if ( isset( $args['order'] ) ) { |
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$order = ' ORDER BY ' . implode( ', ', $args['order'] ); |
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} |
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if ( ! empty( $args['limit'] ) ) { |
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$limit = ' LIMIT ' . $args['limit']; |
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} |
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|
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$index = 0; |
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if ( ! empty( $args['where'] ) ) { |
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$scraps = array(); |
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foreach ( $args['where'] as $column ) { |
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if ( empty( $column ) ) { |
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continue; |
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} |
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if ( strpos( $column, '.' ) !== false ) { |
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$table = strstr( $column, '.', true ); |
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} else { |
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$table = $args['from']; |
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} |
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$scraps[] = array( |
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'table' => $table, |
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'col' => $column, |
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'index' => $index++, |
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); |
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} |
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|
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if ( $scraps ) { |
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foreach ( $scraps as $scrap ) { |
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foreach ( $cols[ $scrap['table'] ] as $col ) { |
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if ( $scrap['col'] === $col['name'] ) { |
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$operator = $args[ $col['type'] . '-operator' ][ $scrap['index'] ]; |
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$operand = $args[ $col['type'] ][ $scrap['index'] ]; |
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$where[] = $scrap['col'] . " $operator '$operand'"; |
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} |
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} |
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} |
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} |
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} |
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|
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if ( count( $tables ) > 1 ) { |
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$fk = $this->get_foreign_key_constraint( $tables[0], $tables[1] ); |
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if ( ! empty( $fk ) ) { |
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$where[] = $fk; |
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} |
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} |
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|
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if ( empty( $where ) ) { |
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$where = ''; |
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} else { |
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$where = ' WHERE ' . implode( ' AND ', $where ); |
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} |
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|
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$query = $select . $from . $where . $group . $order . $limit; |
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$this->_query = $query; |
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|
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do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Firing query: %s', $this->_query ), 'debug', __FILE__, __LINE__ ); |
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} |
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|
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/** |
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* Gets the relationship between tables in the database. |
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* |
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* @access public |
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* @return array |
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*/ |
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public static function get_db_table_mapping() { |
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global $wpdb; |
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$mapping = get_transient( 'visualizer_db_table_mapping' ); |
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if ( $mapping ) { |
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return $mapping; |
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} |
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// no need to provide x=>y and then y=>x as we will flip the array shortly. |
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$mapping = array( |
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$wpdb->prefix . 'posts' => $wpdb->prefix . 'postmeta', |
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$wpdb->prefix . 'users' => $wpdb->prefix . 'usermeta', |
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$wpdb->prefix . 'terms' => $wpdb->prefix . 'termmeta', |
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$wpdb->prefix . 'comments' => $wpdb->prefix . 'commentmeta', |
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); |
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$mapping = apply_filters( 'visualizer_db_table_mapping', $mapping ); |
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$mapping += array_flip( $mapping ); |
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set_transient( 'visualizer_db_table_mapping', $mapping, HOUR_IN_SECONDS ); |
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return $mapping; |
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} |
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|
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/** |
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* Returns the foreign key relationship constraint between the tables. |
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* |
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* @param string $table1 Table 1. |
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* @param string $table2 Table 2. |
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* @access private |
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* @return string |
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*/ |
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private function get_foreign_key_constraint( $table1, $table2 ) { |
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global $wpdb; |
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|
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$posts = array( $wpdb->prefix . 'posts', $wpdb->prefix . 'postmeta' ); |
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$users = array( $wpdb->prefix . 'users', $wpdb->prefix . 'usermeta' ); |
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$terms = array( $wpdb->prefix . 'terms', $wpdb->prefix . 'termmeta' ); |
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$comments = array( $wpdb->prefix . 'comments', $wpdb->prefix . 'commentmeta' ); |
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|
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if ( in_array( $table1, $posts, true ) && in_array( $table2, $posts, true ) ) { |
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return $wpdb->prefix . 'posts.ID = ' . $wpdb->prefix . 'postmeta.post_id'; |
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} |
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if ( in_array( $table1, $users, true ) && in_array( $table2, $users, true ) ) { |
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return $wpdb->prefix . 'users.ID = ' . $wpdb->prefix . 'usermeta.user_id'; |
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} |
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if ( in_array( $table1, $terms, true ) && in_array( $table2, $terms, true ) ) { |
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return $wpdb->prefix . 'terms.term_id = ' . $wpdb->prefix . 'termmeta.term_id'; |
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} |
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if ( in_array( $table1, $comments, true ) && in_array( $table2, $comments, true ) ) { |
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return $wpdb->prefix . 'comments.comment_id = ' . $wpdb->prefix . 'commentmeta.comment_id'; |
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} |
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|
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return apply_filters( 'visualizer_db_fk_constraint', '', $table1, $table2 ); |
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} |
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|
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/** |
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* Gets the column information for the table. |
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* |
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* @param string $table The table. |
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* @param bool $prefix_with_table Whether to prefix column name with the name of the table. |
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* @access private |
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* @return array |
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*/ |
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private static function get_db_table_columns( $table, $prefix_with_table = false ) { |
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global $wpdb; |
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$columns = get_transient( "visualizer_db_{$table}_columns" ); |
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if ( $columns ) { |
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return $columns; |
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} |
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$columns = array(); |
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// @codingStandardsIgnoreStart |
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$rows = $wpdb->get_results( "SHOW COLUMNS IN `$table`", ARRAY_N ); |
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// @codingStandardsIgnoreEnd |
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if ( $rows ) { |
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// n => numeric, d => date-ish, s => string-ish. |
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foreach ( $rows as $row ) { |
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$col = ( $prefix_with_table ? "$table." : '' ) . $row[0]; |
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$type = $row[1]; |
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if ( strpos( $type, 'int' ) !== false || strpos( $type, 'float' ) !== false ) { |
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$type = 'n'; |
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} elseif ( strpos( $type, 'date' ) !== false || strpos( $type, 'time' ) !== false ) { |
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$type = 'd'; |
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} else { |
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$type = 's'; |
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} |
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$columns[] = array( 'name' => $col, 'type' => $type ); |
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} |
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} |
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$mapping = apply_filters( 'visualizer_db_table_columns', $columns, $table ); |
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set_transient( "visualizer_db_{$table}_columns", $columns, DAY_IN_SECONDS ); |
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return $columns; |
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} |
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|
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/** |
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* Gets the dependent tables and then gets column information for all the tables. |
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* |
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* @param string $table The table. |
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* @access public |
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* @return array |
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*/ |
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public static function get_table_columns( $table ) { |
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$columns = array(); |
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if ( ! $table ) { |
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return $columns; |
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} |
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|
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$tables = array( $table ); |
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$mapping = Visualizer_Source_Query_Params::get_db_table_mapping(); |
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if ( array_key_exists( $table, $mapping ) ) { |
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$tables[] = $mapping[ $table ]; |
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} |
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foreach ( $tables as $table ) { |
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$cols = self::get_db_table_columns( $table, count( $tables ) > 1 ); |
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$columns = array_merge( $columns, $cols ); |
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} |
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return $columns; |
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} |
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|
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/** |
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* Gets the tables in the database; |
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* |
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* @access public |
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* @return array |
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*/ |
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public static function get_db_tables() { |
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global $wpdb; |
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$tables = get_transient( 'visualizer_db_tables' ); |
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if ( $tables ) { |
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return $tables; |
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} |
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$tables = array(); |
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$prefix = apply_filters( 'visualizer_db_prefix', $wpdb->prefix ); |
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$sql = $wpdb->get_col( 'SHOW TABLES', 0 ); |
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foreach ( $sql as $table ) { |
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if ( empty( $prefix ) || 0 === strpos( $table, $prefix ) ) { |
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$tables[] = $table; |
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} |
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} |
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$tables = apply_filters( 'visualizer_db_tables', $tables ); |
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set_transient( 'visualizer_db_tables', $tables, HOUR_IN_SECONDS ); |
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return $tables; |
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} |
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|
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/** |
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* Gets all tables and their columns. |
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* |
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* @access public |
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* @return array |
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*/ |
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public static function get_all_db_tables_column_mapping( $chart_id, $use_filter = true ) { |
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$mapping = array(); |
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$tables = self::get_db_tables(); |
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foreach ( $tables as $table ) { |
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$cols = self::get_db_table_columns( $table, true ); |
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$names = wp_list_pluck( $cols, 'name' ); |
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$mapping[ $table ] = $names; |
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} |
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if ( $use_filter ) { |
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return apply_filters( 'visualizer_db_tables_column_mapping', $mapping, $chart_id ); |
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} |
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return $mapping; |
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} |
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|
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|
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/** |
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* Returns source name. |
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* |
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* @since 1.0.0 |
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* |
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* @access public |
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* @return string The name of source. |
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*/ |
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public function getSourceName() { |
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return __CLASS__; |
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} |
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} |
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|
