<?php



#[AllowDynamicProperties]
class WP_List_Util {
	
	private $input = array();

	
	private $output = array();

	
	private $orderby = array();

	
	public function __construct( $input ) {
		$this->output = $input;
		$this->input  = $input;
	}

	
	public function get_input() {
		return $this->input;
	}

	
	public function get_output() {
		return $this->output;
	}

	
	public function filter( $args = array(), $operator = 'AND' ) {
		if ( empty( $args ) ) {
			return $this->output;
		}

		$operator = strtoupper( $operator );

		if ( ! in_array( $operator, array( 'AND', 'OR', 'NOT' ), true ) ) {
			$this->output = array();
			return $this->output;
		}

		$count    = count( $args );
		$filtered = array();

		foreach ( $this->output as $key => $obj ) {
			$matched = 0;

			foreach ( $args as $m_key => $m_value ) {
				if ( is_array( $obj ) ) {
					// Treat object as an array.
					if ( array_key_exists( $m_key, $obj ) && ( $m_value == $obj[ $m_key ] ) ) {
						++$matched;
					}
				} elseif ( is_object( $obj ) ) {
					// Treat object as an object.
					if ( isset( $obj->{$m_key} ) && ( $m_value == $obj->{$m_key} ) ) {
						++$matched;
					}
				}
			}

			if ( ( 'AND' === $operator && $matched === $count )
				|| ( 'OR' === $operator && $matched > 0 )
				|| ( 'NOT' === $operator && 0 === $matched )
			) {
				$filtered[ $key ] = $obj;
			}
		}

		$this->output = $filtered;

		return $this->output;
	}

	
	public function pluck( $field, $index_key = null ) {
		$newlist = array();

		if ( ! $index_key ) {
			/*
			 * This is simple. Could at some point wrap array_column()
			 * if we knew we had an array of arrays.
			 */
			foreach ( $this->output as $key => $value ) {
				if ( is_object( $value ) ) {
					$newlist[ $key ] = $value->$field;
				} elseif ( is_array( $value ) ) {
					$newlist[ $key ] = $value[ $field ];
				} else {
					_doing_it_wrong(
						__METHOD__,
						__( 'Values for the input array must be either objects or arrays.' ),
						'6.2.0'
					);
				}
			}

			$this->output = $newlist;

			return $this->output;
		}

		/*
		 * When index_key is not set for a particular item, push the value
		 * to the end of the stack. This is how array_column() behaves.
		 */
		foreach ( $this->output as $value ) {
			if ( is_object( $value ) ) {
				if ( isset( $value->$index_key ) ) {
					$newlist[ $value->$index_key ] = $value->$field;
				} else {
					$newlist[] = $value->$field;
				}
			} elseif ( is_array( $value ) ) {
				if ( isset( $value[ $index_key ] ) ) {
					$newlist[ $value[ $index_key ] ] = $value[ $field ];
				} else {
					$newlist[] = $value[ $field ];
				}
			} else {
				_doing_it_wrong(
					__METHOD__,
					__( 'Values for the input array must be either objects or arrays.' ),
					'6.2.0'
				);
			}
		}

		$this->output = $newlist;

		return $this->output;
	}

	
	public function sort( $orderby = array(), $order = 'ASC', $preserve_keys = false ) {
		if ( empty( $orderby ) ) {
			return $this->output;
		}

		if ( is_string( $orderby ) ) {
			$orderby = array( $orderby => $order );
		}

		foreach ( $orderby as $field => $direction ) {
			$orderby[ $field ] = 'DESC' === strtoupper( $direction ) ? 'DESC' : 'ASC';
		}

		$this->orderby = $orderby;

		if ( $preserve_keys ) {
			uasort( $this->output, array( $this, 'sort_callback' ) );
		} else {
			usort( $this->output, array( $this, 'sort_callback' ) );
		}

		$this->orderby = array();

		return $this->output;
	}

	
	private function sort_callback( $a, $b ) {
		if ( empty( $this->orderby ) ) {
			return 0;
		}

		$a = (array) $a;
		$b = (array) $b;

		foreach ( $this->orderby as $field => $direction ) {
			if ( ! isset( $a[ $field ] ) || ! isset( $b[ $field ] ) ) {
				continue;
			}

			if ( $a[ $field ] == $b[ $field ] ) {
				continue;
			}

			$results = 'DESC' === $direction ? array( 1, -1 ) : array( -1, 1 );

			if ( is_numeric( $a[ $field ] ) && is_numeric( $b[ $field ] ) ) {
				return ( $a[ $field ] < $b[ $field ] ) ? $results[0] : $results[1];
			}

			return 0 > strcmp( $a[ $field ], $b[ $field ] ) ? $results[0] : $results[1];
		}

		return 0;
	}
}