<?php

/**

 * WordPress environment setup class.

 *

 * @package WordPress

 * @since 2.0.0

 */

class WP {

	/**

	 * Public query variables.

	 *

	 * Long list of public query variables.

	 *

	 * @since 2.0.0

	 * @var string[]

	 */

	/**

	 * Private query variables.

	 *

	 * Long list of private query variables.

	 *

	 * @since 2.0.0

	 * @var string[]

	 */

	public $private_query_vars = array( 'offset', 'posts_per_page', 'posts_per_archive_page', 'showposts', 'nopaging', 'post_type', 'post_status', 'category__in', 'category__not_in', 'category__and', 'tag__in', 'tag__not_in', 'tag__and', 'tag_slug__in', 'tag_slug__and', 'tag_id', 'post_mime_type', 'perm', 'comments_per_page', 'post__in', 'post__not_in', 'post_parent', 'post_parent__in', 'post_parent__not_in', 'title', 'fields' );

	/**

	 * Extra query variables set by the user.

	 *

	 * @since 2.1.0

	 * @var array

	 */

	public $extra_query_vars = array();

	/**

	 * Query variables for setting up the WordPress Query Loop.

	 *

	 * @since 2.0.0

	 * @var array

	 */

	public $query_vars;

	/**

	 * String parsed to set the query variables.

	 *

	 * @since 2.0.0

	 * @var string

	 */

	public $query_string;

	/**

	 * The request path, e.g. 2015/05/06.

	 *

	 * @since 2.0.0

	 * @var string

	 */

	public $request;

	/**

	 * Rewrite rule the request matched.

	 *

	 * @since 2.0.0

	 * @var string

	 */

	public $matched_rule;

	/**

	 * Rewrite query the request matched.

	 *

	 * @since 2.0.0

	 * @var string

	 */

	public $matched_query;

	/**

	 * Whether already did the permalink.

	 *

	 * @since 2.0.0

	 * @var bool

	 */

	public $did_permalink = false;

	/**

	 * Add name to list of public query variables.

	 *

	 * @since 2.1.0

	 *

	 * @param string $qv Query variable name.

	 */

	public function add_query_var( $qv ) {

			$this->public_query_vars[] = $qv;

		}

	}

	/**

	 * Removes a query variable from a list of public query variables.

	 *

	 * @since 4.5.0

	 *

	 * @param string $name Query variable name.

	 */

	public function remove_query_var( $name ) {

		$this->public_query_vars = array_diff( $this->public_query_vars, array( $name ) );

	}

	/**

	 * Set the value of a query variable.

	 *

	 * @since 2.3.0

	 *

	 */

	public function set_query_var( $key, $value ) {

		$this->query_vars[ $key ] = $value;

	}

	/**

	 * Parse request to find correct WordPress query.

	 *

	 * Sets up the query variables based on the request. There are also many

	 * filters and actions that can be used to further manipulate the result.

	 *

	 * @since 2.0.0

	 *

	 *

	 * @param array|string $extra_query_vars Set the extra query variables.

	 */

	public function parse_request( $extra_query_vars = '' ) {

		global $wp_rewrite;

		/**

		 * Filters whether to parse the request.

		 *

		 * @since 3.5.0

		 *

		 * @param bool         $bool             Whether or not to parse the request. Default true.

		 * @param WP           $this             Current WordPress environment instance.

		 * @param array|string $extra_query_vars Extra passed query variables.

		 */

		if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) ) {

			return;

		}

		$this->query_vars     = array();

		$post_type_query_vars = array();

		if ( is_array( $extra_query_vars ) ) {

			$this->extra_query_vars = & $extra_query_vars;

		} elseif ( ! empty( $extra_query_vars ) ) {

			parse_str( $extra_query_vars, $this->extra_query_vars );

		}

		// Process PATH_INFO, REQUEST_URI, and 404 for permalinks.

		// Fetch the rewrite rules.

		$rewrite = $wp_rewrite->wp_rewrite_rules();

		if ( ! empty( $rewrite ) ) {

			// If we match a rewrite rule, this will be cleared.

			$error               = '404';

			$this->did_permalink = true;

			$pathinfo         = isset( $_SERVER['PATH_INFO'] ) ? $_SERVER['PATH_INFO'] : '';

			list( $pathinfo ) = explode( '?', $pathinfo );

			$pathinfo         = str_replace( '%', '%25', $pathinfo );

			list( $req_uri ) = explode( '?', $_SERVER['REQUEST_URI'] );

			$self            = $_SERVER['PHP_SELF'];

			$home_path       = trim( parse_url( home_url(), PHP_URL_PATH ), '/' );

			$home_path_regex = sprintf( '|^%s|i', preg_quote( $home_path, '|' ) );

			$req_uri  = str_replace( $pathinfo, '', $req_uri );

			$req_uri  = trim( $req_uri, '/' );

			$req_uri  = preg_replace( $home_path_regex, '', $req_uri );

			$req_uri  = trim( $req_uri, '/' );

			$pathinfo = trim( $pathinfo, '/' );

			$pathinfo = preg_replace( $home_path_regex, '', $pathinfo );

			$pathinfo = trim( $pathinfo, '/' );

			$self     = trim( $self, '/' );

			$self     = preg_replace( $home_path_regex, '', $self );

			$self     = trim( $self, '/' );

			// The requested permalink is in $pathinfo for path info requests and

			if ( ! empty( $pathinfo ) && ! preg_match( '|^.*' . $wp_rewrite->index . '$|', $pathinfo ) ) {

				$requested_path = $pathinfo;

			} else {

				// If the request uri is the index, blank it out so that we don't try to match it against a rule.

				if ( $req_uri == $wp_rewrite->index ) {

					$req_uri = '';

				}

				$requested_path = $req_uri;

			}

			$requested_file = $req_uri;

			$this->request = $requested_path;

			// Look for matches.

			$request_match = $requested_path;

			if ( empty( $request_match ) ) {

				if ( isset( $rewrite['$'] ) ) {

					$this->matched_rule = '$';

					$query              = $rewrite['$'];

					$matches            = array( '' );

				}

			} else {

				foreach ( (array) $rewrite as $match => $query ) {

					// If the requested file is the anchor of the match, prepend it to the path info.

					if ( ! empty( $requested_file ) && strpos( $match, $requested_file ) === 0 && $requested_file != $requested_path ) {

						$request_match = $requested_file . '/' . $requested_path;

					}

					if ( preg_match( "#^$match#", $request_match, $matches ) ||

						preg_match( "#^$match#", urldecode( $request_match ), $matches ) ) {

						if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {

							// This is a verbose page match, let's check to be sure about it.

							$page = get_page_by_path( $matches[ $varmatch[1] ] );

							if ( ! $page ) {

								continue;

							}

							$post_status_obj = get_post_status_object( $page->post_status );

							if ( ! $post_status_obj->public && ! $post_status_obj->protected

								&& ! $post_status_obj->private && $post_status_obj->exclude_from_search ) {

								continue;

							}

						}

						// Got a match.

						$this->matched_rule = $match;

						break;

					}

				}

			}

			if ( isset( $this->matched_rule ) ) {

				// Trim the query of everything up to the '?'.

				$query = preg_replace( '!^.+\?!', '', $query );

				// Substitute the substring matches into the query.

				$query = addslashes( WP_MatchesMapRegex::apply( $query, $matches ) );

				$this->matched_query = $query;

				// Parse the query.

				parse_str( $query, $perma_query_vars );

				// If we're processing a 404 request, clear the error var since we found something.

				if ( '404' == $error ) {

					unset( $error, $_GET['error'] );

				}

			}

			// If req_uri is empty or if it is a request for ourself, unset error.

			if ( empty( $requested_path ) || $requested_file == $self || strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) {

				unset( $error, $_GET['error'] );

				if ( isset( $perma_query_vars ) && strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) {

					unset( $perma_query_vars );

				}

				$this->did_permalink = false;

			}

		}

		/**

		 *

		 * Allows (publicly allowed) query vars to be added, removed, or changed prior

		 * to executing the query. Needed to allow custom rewrite rules using your own arguments

		 * to work, or any other custom query variables you want to be publicly available.

		 *

		 * @since 1.5.0

		 *

		 */

		$this->public_query_vars = apply_filters( 'query_vars', $this->public_query_vars );

		foreach ( get_post_types( array(), 'objects' ) as $post_type => $t ) {

			if ( is_post_type_viewable( $t ) && $t->query_var ) {

				$post_type_query_vars[ $t->query_var ] = $post_type;

			}

		}

		foreach ( $this->public_query_vars as $wpvar ) {

			if ( isset( $this->extra_query_vars[ $wpvar ] ) ) {

				$this->query_vars[ $wpvar ] = $this->extra_query_vars[ $wpvar ];

			} elseif ( isset( $_GET[ $wpvar ] ) && isset( $_POST[ $wpvar ] ) && $_GET[ $wpvar ] !== $_POST[ $wpvar ] ) {

				wp_die( __( 'A variable mismatch has been detected.' ), __( 'Sorry, you are not allowed to view this item.' ), 400 );

			} elseif ( isset( $_POST[ $wpvar ] ) ) {

				$this->query_vars[ $wpvar ] = $_POST[ $wpvar ];

			} elseif ( isset( $_GET[ $wpvar ] ) ) {

				$this->query_vars[ $wpvar ] = $_GET[ $wpvar ];

			} elseif ( isset( $perma_query_vars[ $wpvar ] ) ) {

				$this->query_vars[ $wpvar ] = $perma_query_vars[ $wpvar ];

			}

			if ( ! empty( $this->query_vars[ $wpvar ] ) ) {

				if ( ! is_array( $this->query_vars[ $wpvar ] ) ) {

					$this->query_vars[ $wpvar ] = (string) $this->query_vars[ $wpvar ];

				} else {

					foreach ( $this->query_vars[ $wpvar ] as $vkey => $v ) {

						if ( is_scalar( $v ) ) {

							$this->query_vars[ $wpvar ][ $vkey ] = (string) $v;

						}

					}

				}

				if ( isset( $post_type_query_vars[ $wpvar ] ) ) {

					$this->query_vars['post_type'] = $post_type_query_vars[ $wpvar ];

					$this->query_vars['name']      = $this->query_vars[ $wpvar ];

				}

			}

		}

		foreach ( get_taxonomies( array(), 'objects' ) as $taxonomy => $t ) {

			if ( $t->query_var && isset( $this->query_vars[ $t->query_var ] ) ) {

				$this->query_vars[ $t->query_var ] = str_replace( ' ', '+', $this->query_vars[ $t->query_var ] );

			}

		}

		// Don't allow non-publicly queryable taxonomies to be queried from the front end.

		if ( ! is_admin() ) {

			foreach ( get_taxonomies( array( 'publicly_queryable' => false ), 'objects' ) as $taxonomy => $t ) {

				/*

				 * Disallow when set to the 'taxonomy' query var.

				 * Non-publicly queryable taxonomies cannot register custom query vars. See register_taxonomy().

				 */

				if ( isset( $this->query_vars['taxonomy'] ) && $taxonomy === $this->query_vars['taxonomy'] ) {

					unset( $this->query_vars['taxonomy'], $this->query_vars['term'] );

				}

			}

		}

		if ( isset( $this->query_vars['post_type'] ) ) {

			$queryable_post_types = get_post_types( array( 'publicly_queryable' => true ) );

			if ( ! is_array( $this->query_vars['post_type'] ) ) {

					unset( $this->query_vars['post_type'] );

				}

			} else {

				$this->query_vars['post_type'] = array_intersect( $this->query_vars['post_type'], $queryable_post_types );

			}

		}

		// Resolve conflicts between posts with numeric slugs and date archive queries.

		$this->query_vars = wp_resolve_numeric_slug_conflicts( $this->query_vars );

		foreach ( (array) $this->private_query_vars as $var ) {

			if ( isset( $this->extra_query_vars[ $var ] ) ) {

				$this->query_vars[ $var ] = $this->extra_query_vars[ $var ];

			}

		}

		if ( isset( $error ) ) {

			$this->query_vars['error'] = $error;

		}

		/**

		 * Filters the array of parsed query variables.

		 *

		 * @since 2.1.0

		 *

		 * @param array $query_vars The array of requested query variables.

		 */

		$this->query_vars = apply_filters( 'request', $this->query_vars );

		/**

		 * Fires once all query variables for the current request have been parsed.

		 *

		 * @since 2.1.0

		 *

		 * @param WP $this Current WordPress environment instance (passed by reference).

		 */

		do_action_ref_array( 'parse_request', array( &$this ) );

	}

	/**

	 * Sends additional HTTP headers for caching, content type, etc.