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<?php |
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|
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namespace Booktics\Abstracts; |
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|
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use wpdb; |
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|
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class DB_Query_Builder { |
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/** @var wpdb */ |
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private $db; |
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/** @var string */ |
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private $table; |
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/** @var array */ |
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private $conditions = array(); |
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/** @var array */ |
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private $values = array(); |
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/** @var array */ |
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private $columns = array( '*' ); |
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/** @var int|null */ |
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private $limit = null; |
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/** @var int|null */ |
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private $offset = null; |
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|
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private $order_by = array(); |
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|
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/** |
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* Initialize the query builder with a database connection |
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* |
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* @param wpdb $db WordPress database instance |
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*/ |
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public function __construct( wpdb $db ) { |
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$this->db = $db; |
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} |
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|
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/** |
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* Set the table name for the query |
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* |
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* @param string $table Table name without prefix |
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* |
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* @return self Returns the current instance for method chaining |
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*/ |
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public function table( string $table ): self { |
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$this->table = booktics_get_table_name( $table ); |
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|
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return $this; |
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} |
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|
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/** |
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* Select specific columns for the query |
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* |
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* @param array $columns Array of column names to select |
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* |
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* @return self Returns the current instance for method chaining |
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*/ |
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public function select( array $columns ): self { |
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$this->columns = $columns; |
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|
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return $this; |
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} |
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|
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/** |
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* Add a WHERE condition to the query |
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* |
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* @param string $column Column name |
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* @param string $operator Comparison operator (=, >, <, etc.) |
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* @param mixed $value Value to compare against |
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* |
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* @return self Returns the current instance for method chaining |
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*/ |
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public function where( string $column, string $operator, $value ): self { |
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$this->conditions[] = "$column $operator %s"; |
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$this->values[] = $value; |
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|
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return $this; |
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} |
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|
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/** |
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* Add an OR WHERE condition to the query |
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* |
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* @param string $column Column name |
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* @param string $operator Comparison operator (=, >, <, etc.) |
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* @param mixed $value Value to compare against |
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* |
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* @return self Returns the current instance for method chaining |
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*/ |
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public function or_where( string $column, string $operator, $value ): self { |
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$last = array_pop( $this->conditions ); |
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$this->conditions[] = "($last OR $column $operator %s)"; |
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$this->values[] = $value; |
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|
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return $this; |
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} |
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|
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/** |
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* add and where with a group of conditions |
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* |
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* @param callable $callback |
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* |
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* @return $this |
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*/ |
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public function where_group( callable $callback ): self { |
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$query = new self( $this->db ); |
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$callback( $query ); |
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$group = implode( ' AND ', $query->conditions ); |
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$this->conditions[] = "($group)"; |
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$this->values = array_merge( $this->values, $query->values ); |
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|
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return $this; |
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} |
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|
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/** |
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* add or where with a group of conditions |
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* |
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* @param callable $callback |
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* |
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* @return $this |
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*/ |
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public function or_where_group( callable $callback ): self { |
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$query = new self( $this->db ); |
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$callback( $query ); |
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$group = implode( ' AND ', $query->conditions ); |
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$last = array_pop( $this->conditions ); |
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$this->conditions[] = "($last OR ($group))"; |
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$this->values = array_merge( $this->values, $query->values ); |
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|
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return $this; |
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} |
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|
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/** |
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* Set the maximum number of records to retrieve |
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* |
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* @param int $limit |
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* |
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* @return self |
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*/ |
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public function limit( int $limit ): self { |
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$this->limit = $limit; |
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|
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return $this; |
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} |
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|
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/** |
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* Set the starting position of records |
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* |
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* @param int $offset |
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* |
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* @return self |
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*/ |
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public function offset( int $offset ): self { |
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$this->offset = $offset; |
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|
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return $this; |
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} |
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|
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/** |
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* Set the ordering condition |
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* |
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* @param array $order_by |
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* |
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* @return self |
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*/ |
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public function order_by( array $order_by ): self { |
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$this->order_by = $order_by; |
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|
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return $this; |
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} |
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|
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/** |
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* Get total count of records |
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* |
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* @return int |
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*/ |
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public function count(): int { |
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$sql = "SELECT COUNT(*) as count FROM {$this->table}"; |
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|
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if ( $this->conditions ) { |
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$sql .= ' WHERE ' . implode( ' AND ', $this->conditions ); |
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} |
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|
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$prepared = $this->db->prepare( $sql, ...$this->values ); |
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$result = $this->db->get_row( $prepared ); |
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|
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if ( $result === null ) { |
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throw new \RuntimeException( sprintf( 'Query failed: %s', esc_html( $this->db->last_error ) ) ); |
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} |
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return (int) $result->count; |
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} |
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|
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/** |
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* Calculate sum of a column |
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* |
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* @param string $column Column name to sum |
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* |
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* @return float |
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*/ |
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public function sum( string $column ): float { |
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$sql = "SELECT SUM($column) as sum FROM {$this->table}"; |
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|
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if ( $this->conditions ) { |
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$sql .= ' WHERE ' . implode( ' AND ', $this->conditions ); |
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} |
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|
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$prepared = $this->db->prepare( $sql, ...$this->values ); |
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$result = $this->db->get_row( $prepared ); |
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|
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if ( $result === null ) { |
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throw new \RuntimeException( sprintf( 'Query failed: %s', esc_html( $this->db->last_error ) ) ); |
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} |
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return (float) $result->sum; |
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} |
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|
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/** |
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* Get query result |
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* |
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* @return array |
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*/ |
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public function get(): array { |
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$sql = 'SELECT ' . implode( ', ', $this->columns ) . " FROM {$this->table}"; |
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|
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if ( $this->conditions ) { |
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$sql .= ' WHERE ' . implode( ' AND ', $this->conditions ); |
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} |
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|
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if ( ! empty( $this->order_by ) ) { |
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$sql .= ' ORDER BY ' . ( $this->order_by[0] ?? 'id' ) . ' ' . ( $this->order_by[1] ?? 'ASC' ); |
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} |
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|
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if ( $this->limit !== null ) { |
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$sql .= " LIMIT {$this->limit}"; |
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} |
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|
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if ( $this->offset !== null ) { |
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$sql .= " OFFSET {$this->offset}"; |
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} |
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|
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$prepared = $this->db->prepare( $sql, ...$this->values ); |
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$results = $this->db->get_results( $prepared ); |
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|
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if ( $results === null ) { |
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throw new \RuntimeException( esc_html( "Query failed: {$this->db->last_error}" ) ); |
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} |
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|
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return $results; |
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} |
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|
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/** |
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* Get the first record matching the query |
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* |
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* @return object|null |
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*/ |
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public function first(): ?object { |
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$sql = 'SELECT ' . implode( ', ', $this->columns ) . " FROM {$this->table}"; |
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|
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if ( $this->conditions ) { |
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$sql .= ' WHERE ' . implode( ' AND ', $this->conditions ); |
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} |
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|
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$sql .= ' LIMIT 1'; |
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|
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$prepared = $this->db->prepare( $sql, ...$this->values ); |
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$result = $this->db->get_row( $prepared ); |
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|
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if ( $result === null && $this->db->last_error ) { |
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throw new \RuntimeException( sprintf( 'Query failed: %s', esc_html( $this->db->last_error ) ) ); |
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} |
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|
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return $result; |
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} |
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|
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/** |
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* Convert query result to array |
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* |
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* @return array |
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*/ |
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public function to_array(): array { |
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$results = $this->get(); |
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|
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return array_map( |
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function ( $row ) { |
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return (array) $row; |
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}, $results |
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); |
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} |
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|
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/** |
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* Insert data into the table |
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* |
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* @param array $data |
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* |
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* @return int|false |
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*/ |
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public function insert( array $data ) { |
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$sql = $this->prepare_insert( $data ); |
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|
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$query_result = $this->db->query( $sql ); |
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|
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return $query_result ? $this->db->insert_id : false; |
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} |
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|
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/** |
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* Prepare SQL INSERT statement |
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* |
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* @param array $data |
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* |
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* @return string |
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*/ |
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private function prepare_insert( array $data ): string { |
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$columns = array_keys( $data ); |
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$values = array_map( |
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function ( $value ) { |
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if ( is_null( $value ) ) { |
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return 'NULL'; |
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} |
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if ( is_numeric( $value ) ) { |
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return $value; |
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} |
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|
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return "'" . esc_sql( $value ) . "'"; |
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}, array_values( $data ) |
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); |
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|
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return sprintf( |
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'INSERT INTO %s (%s) VALUES (%s)', |
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$this->table, |
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implode( ', ', $columns ), |
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implode( ', ', $values ) |
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); |
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} |
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|
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/** |
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* Update records in the table |
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* |
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* @param array $data Data to update |
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* |
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* @return bool |
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*/ |
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public function update( array $data ): bool { |
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if ( empty( $this->conditions ) ) { |
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throw new \RuntimeException( 'Update operation requires WHERE conditions' ); |
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} |
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|
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$set = array(); |
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foreach ( $data as $column => $value ) { |
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if ( is_null( $value ) ) { |
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$set[] = "$column = NULL"; |
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} elseif ( is_numeric( $value ) ) { |
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$set[] = "$column = $value"; |
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} else { |
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$set[] = "$column = '" . esc_sql( $value ) . "'"; |
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} |
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} |
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|
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$sql = sprintf( |
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'UPDATE %s SET %s WHERE %s', |
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$this->table, |
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implode( ', ', $set ), |
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implode( ' AND ', $this->conditions ) |
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); |
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|
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$prepared = $this->db->prepare( $sql, ...$this->values ); |
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$result = $this->db->query( $prepared ); |
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|
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if ( $result === false ) { |
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throw new \RuntimeException( sprintf( 'Update failed: %s', esc_html( $this->db->last_error ) ) ); |
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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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* Delete records from the table |
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* |
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* @return bool |
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*/ |
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public function delete(): bool { |
| 377 |
if ( empty( $this->conditions ) ) { |
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throw new \RuntimeException( 'Delete operation requires WHERE conditions' ); |
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} |
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|
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$sql = sprintf( |
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'DELETE FROM %s WHERE %s', |
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$this->table, |
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implode( ' AND ', $this->conditions ) |
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); |
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|
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$prepared = $this->db->prepare( $sql, ...$this->values ); |
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$result = $this->db->query( $prepared ); |
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|
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if ( $result === false ) { |
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throw new \RuntimeException( sprintf( 'Delete failed: %s', esc_html( $this->db->last_error ) ) ); |
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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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|
