<?php
/**
 * WPSEO Premium plugin file.
 *
 * @package WPSEO\Premium
 */

use Yoast\WP\SEO\Integrations\Blocks\Siblings_Block;
use Yoast\WP\SEO\Integrations\Blocks\Subpages_Block;
use Yoast\WP\SEO\Premium\Addon_Installer;
use Yoast\WP\SEO\Presenters\Admin\Help_Link_Presenter;
use Yoast\WP\SEO\Repositories\Indexable_Repository;

/**
 * Class WPSEO_Premium
 */
class WPSEO_Premium {

	/**
	 * Option that stores the current version.
	 *
	 * @var string
	 */
	public const OPTION_CURRENT_VERSION = 'wpseo_current_version';

	/**
	 * Human readable version of the current version.
	 *
	 * @var string
	 */
	public const PLUGIN_VERSION_NAME = '26.1';

	/**
	 * Machine readable version for determining whether an upgrade is needed.
	 *
	 * @var string
	 */
	public const PLUGIN_VERSION_CODE = '16';

	/**
	 * Instance of the WPSEO_Redirect_Page class.
	 *
	 * @var WPSEO_Redirect_Page
	 */
	private $redirects;

	/**
	 * List of registered classes implementing the WPSEO_WordPress_Integration interface.
	 *
	 * @var WPSEO_WordPress_Integration[]
	 */
	private $integrations = [];

	/**
	 * Function that will be executed when plugin is activated.
	 *
	 * @return void
	 */
	public static function install() {
		if ( ! Addon_Installer::is_yoast_seo_up_to_date() ) {
			delete_option( Addon_Installer::OPTION_KEY );
		}
		$wpseo_addon_installer = new Addon_Installer( __DIR__ );
		$wpseo_addon_installer->install_yoast_seo_from_repository();

		// Load the Redirect File Manager.
		require_once WPSEO_PREMIUM_PATH . 'classes/redirect/redirect-file-util.php';

		// Create the upload directory.
		WPSEO_Redirect_File_Util::create_upload_dir();

		// Enable tracking.
		if ( class_exists( WPSEO_Options::class ) ) {
			WPSEO_Premium_Option::register_option();
			if ( WPSEO_Options::get( 'toggled_tracking' ) !== true ) {
				WPSEO_Options::set( 'tracking', true );
			}
			WPSEO_Options::set( 'should_redirect_after_install', true );
		}

		if ( class_exists( WPSEO_Capability_Manager_Factory::class ) ) {
			do_action( 'wpseo_register_capabilities_premium' );
			WPSEO_Capability_Manager_Factory::get( 'premium' )->add();
		}
	}

	/**
	 * WPSEO_Premium Constructor
	 */
	public function __construct() {
		$this->integrations = [
			'premium-metabox'              => new WPSEO_Premium_Metabox(
				YoastSEOPremium()->helpers->prominent_words,
				YoastSEOPremium()->helpers->current_page
			),
			'premium-assets'               => new WPSEO_Premium_Assets(),
			'link-suggestions'             => new WPSEO_Metabox_Link_Suggestions(),
			'redirects-endpoint'           => new WPSEO_Premium_Redirect_EndPoint( new WPSEO_Premium_Redirect_Service() ),
			'redirects-undo-endpoint'      => new WPSEO_Premium_Redirect_Undo_EndPoint( new WPSEO_Redirect_Manager() ),
			'redirect-export-manager'      => new WPSEO_Premium_Redirect_Export_Manager(),
			'keyword-export-manager'       => new WPSEO_Premium_Keyword_Export_Manager(),
			'orphaned-post-filter'         => new WPSEO_Premium_Orphaned_Post_Filter(),
			'expose-javascript-shortlinks' => new WPSEO_Premium_Expose_Shortlinks(),
			'multi-keyword'                => new WPSEO_Multi_Keyword(),
			'siblings-block'               => new Siblings_Block( YoastSEO()->classes->get( Indexable_Repository::class ) ),
			'subpages-block'               => new Subpages_Block( YoastSEO()->classes->get( Indexable_Repository::class ) ),
		];

		if ( WPSEO_Options::get( 'enable_cornerstone_content', null, [ 'wpseo' ] ) ) {
			$this->integrations['stale-cornerstone-content-filter'] = new WPSEO_Premium_Stale_Cornerstone_Content_Filter();
		}

		$this->setup();
	}

	/**
	 * Sets up the Yoast SEO premium plugin.
	 *
	 * @return void
	 */
	private function setup() {
		$this->load_textdomain();

		$this->redirect_setup();

		add_action( 'init', [ 'WPSEO_Premium_Option', 'register_option' ] );
		add_action( 'init', [ 'WPSEO_Premium_Redirect_Option', 'register_option' ] );

		if ( is_admin() ) {
			// Make sure priority is below registration of other implementations of the beacon in News, Video, etc.
			add_filter( 'wpseo_helpscout_beacon_settings', [ $this, 'filter_helpscout_beacon' ], 1 );

			add_filter( 'wpseo_enable_tracking', '__return_true', 1 );

			// Add Sub Menu page and add redirect page to admin page array.
			// This should be possible in one method in the future, see #535.
			add_filter( 'wpseo_submenu_pages', [ $this, 'add_submenu_pages' ], 9 );

			// Add input fields to page meta post types.
			add_action(
				'Yoast\WP\SEO\admin_post_types_beforearchive_internal',
				[
					$this,
					'admin_page_meta_post_types_checkboxes',
				],
				10,
				2
			);
			// Settings.
			add_action( 'admin_init', [ $this, 'register_settings' ] );

			// Add Premium imports.
			$this->integrations[] = new WPSEO_Premium_Import_Manager();
		}

		// Add page analysis fields to variable array key patterns.
		add_filter(
			'wpseo_option_titles_variable_array_key_patterns',
			[ $this, 'add_variable_array_key_pattern' ]
		);

		// Only activate post and term watcher if permalink structure is enabled.
		if ( get_option( 'permalink_structure' ) ) {
			add_action( 'admin_init', [ $this, 'init_watchers' ] );
			add_action( 'rest_api_init', [ $this, 'init_watchers' ] );
		}

		if ( ! is_admin() ) {
			// Add 404 redirect link to WordPress toolbar.
			add_action( 'admin_bar_menu', [ $this, 'admin_bar_menu' ], 96 );

			add_filter( 'redirect_canonical', [ $this, 'redirect_canonical_fix' ], 1, 2 );
		}

		add_action( 'wpseo_premium_indicator_classes', [ $this, 'change_premium_indicator' ] );
		add_action( 'wpseo_premium_indicator_text', [ $this, 'change_premium_indicator_text' ] );

		foreach ( $this->integrations as $integration ) {
			$integration->register_hooks();
		}
	}

	/**
	 * Checks if the page is a premium page.
	 *
	 * @param string $page The page to check.
	 *
	 * @return bool
	 */
	private function is_yoast_seo_premium_page( $page ) {
		$premium_pages = [ 'wpseo_redirects' ];

		return in_array( $page, $premium_pages, true );
	}

	/**
	 * Sets the autoloader for the redirects and instantiates the redirect page object.
	 *
	 * @return void
	 */
	private function redirect_setup() {
		$this->redirects = new WPSEO_Redirect_Page();

		// Adds integration that filters redirected entries from the sitemap.
		$this->integrations['redirect-sitemap-filter'] = new WPSEO_Redirect_Sitemap_Filter( home_url() );
	}

	/**
	 * Initialize the watchers for the posts and the terms
	 *
	 * @return void
	 */
	public function init_watchers() {
		// The Post Watcher.
		$post_watcher = new WPSEO_Post_Watcher();
		$post_watcher->register_hooks();

		// The Term Watcher.
		$term_watcher = new WPSEO_Term_Watcher();
		$term_watcher->register_hooks();
	}

	/**
	 * Hooks into the `redirect_canonical` filter to catch ongoing redirects and move them to the correct spot
	 *
	 * @param string $redirect_url  The target url where the requested URL will be redirected to.
	 * @param string $requested_url The current requested URL.
	 *
	 * @return string
	 */
	public function redirect_canonical_fix( $redirect_url, $requested_url ) {
		$redirects = new WPSEO_Redirect_Option( false );
		$path      = wp_parse_url( $requested_url, PHP_URL_PATH );
		$redirect  = $redirects->get( $path );
		if ( $redirect === false ) {
			return $redirect_url;
		}

		$redirect_url = $redirect->get_origin();
		if ( substr( $redirect_url, 0, 1 ) === '/' ) {
			$redirect_url = home_url( $redirect_url );
		}

		wp_redirect( $redirect_url, $redirect->get_type(), 'Yoast SEO Premium' );
		exit;
	}

	/**
	 * Add 'Create Redirect' option to admin bar menu on 404 pages
	 *
	 * @return void
	 */
	public function admin_bar_menu() {
		// Prevent function from running if the page is not a 404 page or the user has not the right capabilities to create redirects.
		if ( ! is_404() || ! WPSEO_Capability_Utils::current_user_can( 'wpseo_manage_options' ) ) {
			return;
		}

		global $wp, $wp_admin_bar;

		$parsed_url = wp_parse_url( home_url( $wp->request ) );

		if ( ! is_array( $parsed_url ) || empty( $parsed_url['path'] ) ) {
			return;
		}

		$old_url = WPSEO_Redirect_Util::strip_base_url_path_from_url( home_url(), $parsed_url['path'] );

		if ( isset( $parsed_url['query'] ) && $parsed_url['query'] !== '' ) {
			$old_url .= '?' . $parsed_url['query'];
		}

		$old_url = rawurlencode( $old_url );

		$node = [
			'id'    => 'wpseo-premium-create-redirect',
			'title' => __( 'Create Redirect', 'wordpress-seo-premium' ),
			'href'  => wp_nonce_url( admin_url( 'admin.php?page=wpseo_redirects&old_url=' . $old_url ), 'wpseo_redirects-old-url', 'wpseo_premium_redirects_nonce' ),
		];
		$wp_admin_bar->add_menu( $node );
	}

	/**
	 * Add page analysis to array with variable array key patterns
	 *
	 * @param array $patterns Array with patterns for page analysis.
	 *
	 * @return array
	 */
	public function add_variable_array_key_pattern( $patterns ) {
		if ( in_array( 'page-analyse-extra-', $patterns, true ) === false ) {
			$patterns[] = 'page-analyse-extra-';
		}

		return $patterns;
	}

	/**
	 * This hook will add an input-field for specifying custom fields for page analysis.
	 *
	 * The values will be comma-separated and will target the belonging field in the post_meta. Page analysis will
	 * use the content of it by sticking it to the post_content.
	 *
	 * @param Yoast_Form $yform The Yoast_Form object.
	 * @param string     $name  The post type name.
	 *
	 * @return void
	 */
	public function admin_page_meta_post_types_checkboxes( $yform, $name ) {
		$custom_fields_help_link = new Help_Link_Presenter(
			WPSEO_Shortlinker::get( 'https://yoa.st/4cr' ),
			__( 'Learn more about including custom fields in the page analysis', 'wordpress-seo-premium' )
		);

		echo '<div class="yoast-settings-section yoast-settings-section--last">';

		$yform->textinput_extra_content(
			'page-analyse-extra-' . $name,
			esc_html__( 'Custom fields to include in page analysis', 'wordpress-seo-premium' ),
			[
				'extra_content' => $custom_fields_help_link,
			]
		);
		echo '</div>';
	}

	/**
	 * Function adds the premium pages to the Yoast SEO menu
	 *
	 * @param array $submenu_pages Array with the configuration for the submenu pages.
	 *
	 * @return array
	 */
	public function add_submenu_pages( $submenu_pages ) {
		$submenu_pages[] = [
			'wpseo_dashboard',
			'',
			__( 'Redirects', 'wordpress-seo-premium' ) . ' <span class="yoast-badge yoast-premium-badge"></span>',
			'wpseo_manage_redirects',
			'wpseo_redirects',
			[ $this->redirects, 'display' ],
		];

		return $submenu_pages;
	}

	/**
	 * Change premium indicator to green when premium is enabled
	 *
	 * @param string[] $classes The current classes for the indicator.
	 *
	 * @return string[] The new classes for the indicator.
	 */
	public function change_premium_indicator( $classes ) {
		$class_no = array_search( 'wpseo-premium-indicator--no', $classes, true );

		if ( $class_no !== false ) {
			unset( $classes[ $class_no ] );

			$classes[] = 'wpseo-premium-indicator--yes';
		}

		return $classes;
	}

	/**
	 * Replaces the screen reader text for the premium indicator.
	 *
	 * @param string $text The original text.
	 *
	 * @return string The new text.
	 */
	public function change_premium_indicator_text( $text ) {
		return __( 'Enabled', 'wordpress-seo-premium' );
	}

	/**
	 * Register the premium settings
	 *
	 * @return void
	 */
	public function register_settings() {
		register_setting( 'yoast_wpseo_redirect_options', 'wpseo_redirect' );
	}

	/**
	 * Output admin css in admin head
	 *
	 * @return void
	 */
	public function admin_css() {
		echo "<style type='text/css'>#wpseo_content_top{ padding-left: 0; margin-left: 0; }</style>";
	}

	/**
	 * Load textdomain
	 *
	 * @return void
	 */
	private function load_textdomain() {
		load_plugin_textdomain( 'wordpress-seo-premium', false, dirname( WPSEO_PREMIUM_BASENAME ) . '/languages/' );
	}

	/**
	 * Initializes the HelpScout support modal for WPSEO settings pages.
	 *
	 * @param array $helpscout_settings The helpscout settings.
	 *
	 * @return array The HelpScout beacon settings array.
	 */
	public function filter_helpscout_beacon( $helpscout_settings ) {
		$beacon_id = '1ae02e91-5865-4f13-b220-7daed946ba25';

		$helpscout_settings['products'][] = WPSEO_Addon_Manager::PREMIUM_SLUG;

		// Set the beacon to the premium beacon for all pages.
		foreach ( $helpscout_settings['pages_ids'] as $page => $beacon ) {
			$helpscout_settings['pages_ids'][ $page ] = $beacon_id;
		}
		// Add the redirects page.
		$helpscout_settings['pages_ids']['wpseo_redirects'] = $beacon_id;

		return $helpscout_settings;
	}
}
