<?php

/*
	Plugin Name: 404 Solution
	Plugin URI:  https://www.ajexperience.com/404-solution/
	Description: The smartest 404 plugin - uses intelligent matching and spell-checking to find what visitors were actually looking for, not just redirect to homepage
	Author:      Aaron J
	Author URI:  https://www.ajexperience.com/404-solution/

	Version: 3.1.1
	Requires at least: 5.0
	Requires PHP: 7.4

	License: GPL-3.0-or-later
	License URI: https://www.gnu.org/licenses/gpl-3.0.html
	Domain Path: /languages
	Text Domain: 404-solution

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

define('ABJ404_PP', 'abj404_solution');
define('ABJ404_FILE', __FILE__);
define('ABJ404_PATH', plugin_dir_path(ABJ404_FILE));
define('ABJ404_SHORTCODE_NAME', 'abj404_solution_page_suggestions');
$GLOBALS['abj404_display_errors'] = false;

// Debug whitelist - only includes localhost/development environments by default
// WARNING: Only add trusted domains to this list. External domains could be a security risk.
// This list is used to enable detailed error logging for debugging purposes.
$GLOBALS['abj404_whitelist'] = array('127.0.0.1', '::1', 'localhost');

// Allow filtering the whitelist for advanced users who need to add custom domains
// Usage: add_filter('abj404_debug_whitelist', function($whitelist) { $whitelist[] = 'yourdomain.com'; return $whitelist; });
if (has_filter('abj404_debug_whitelist')) {
    $GLOBALS['abj404_whitelist'] = apply_filters('abj404_debug_whitelist', $GLOBALS['abj404_whitelist']);
}

$abj404_autoLoaderClassMap = array();
function abj404_autoloader($class) {
	// some people were having issues with possibly parent classes not being loaded before their children.
	$childParentMap = [
		'ABJ_404_Solution_FunctionsMBString' => 'ABJ_404_Solution_Functions',
		'ABJ_404_Solution_FunctionsPreg' => 'ABJ_404_Solution_Functions',
	];

	// only pay attention if it's for us. don't bother for other things.
	if (substr($class, 0, 16) == 'ABJ_404_Solution') {
		global $abj404_autoLoaderClassMap;
		if (empty($abj404_autoLoaderClassMap)) {
			foreach (array('includes/php/objs', 'includes/php/wordpress', 'includes/php', 'includes/php',
					'includes/ajax', 'includes') as $dir) {
					
					$globInput = ABJ404_PATH . $dir . DIRECTORY_SEPARATOR . '*.php';
					$files = glob($globInput);
					foreach ($files as $file) {
						// /Users/user..../php/Study.php becomes ABJ_FC\Study
						$pathParts = pathinfo($file);
						$classNameWhenLoading = 'ABJ_404_Solution_' . $pathParts['filename'];
						$abj404_autoLoaderClassMap[$classNameWhenLoading] = $file;
					}
			}
		}

		if (array_key_exists($class, $abj404_autoLoaderClassMap)) {
			// Ensure the parent class is loaded first
			if (array_key_exists($class, $childParentMap)) {
				$parentClass = $childParentMap[$class];
				if (!class_exists($parentClass)) {
					require_once $abj404_autoLoaderClassMap[$parentClass];
				}
			}

			require_once $abj404_autoLoaderClassMap[$class];
		}
	}
}
spl_autoload_register('abj404_autoloader');

add_action('doing_it_wrong_run', function($function_name, $message, $version) {
	if (strpos($message, '404-solution') !== false &&
		$function_name == '_load_textdomain_just_in_time') {
		
        try {
            $backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);

            // Prepare the plugin path from ABJ404_FILE
            $pluginPath = trailingslashit(plugin_dir_path(ABJ404_FILE)); // e.g., /var/www/html/wp-content/plugins/404-solution/

			$logMessage = '';
            $isOurPlugin = false;

            foreach ($backtrace as $index => $frame) {
                $file = isset($frame['file']) ? $frame['file'] : '[internal function]';
                $line = isset($frame['line']) ? $frame['line'] : '';
                $func = isset($frame['function']) ? $frame['function'] : '[unknown function]';

                if (!$isOurPlugin && is_string($file) && strpos($file, $pluginPath) !== false) {
                    $isOurPlugin = true;
                }

                $logMessage .= "#$index $func at [$file:$line]\n";
            }

            if ($isOurPlugin) {
				$header = "=== Detected Early Translation ===\n" .
					"Function: $function_name\n" .
					"Message: $message\n" .
					"Version: $version\n";
  
				if (!isset($GLOBALS['abj404_pending_errors'])) {
					$GLOBALS['abj404_pending_errors'] = [];
				}
				$GLOBALS['abj404_pending_errors'][] = $header . $logMessage;
			}

        } catch (Throwable $e) {
            // error_log('Failed to log early translation stack trace: ' . $e->getMessage());
        }
    }
}, 10, 3);

// shortcode
add_shortcode(ABJ404_SHORTCODE_NAME, 'abj404_shortCodeListener');
function abj404_shortCodeListener($atts) {
    require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
    return ABJ_404_Solution_ShortCode::shortcodePageSuggestions($atts);
}

// admin
if (is_admin()) {
	require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
	ABJ_404_Solution_WordPress_Connector::init();
	ABJ_404_Solution_ViewUpdater::init();
}

// ----
// get the plugin priority to use before adding the template_redirect action.
$__abj404_options = get_option('abj404_settings');
$__abj404_template_redirect_priority = absint($__abj404_options['template_redirect_priority'] ?? 9);

add_action('template_redirect', 'abj404_404listener', $__abj404_template_redirect_priority);

unset($__abj404_options);
unset($__abj404_template_redirect_priority);
// ---

// 404
function abj404_404listener() {
	// always ignore admin screens and login requests.
	$isLoginScreen = (false !== stripos(wp_login_url(), $_SERVER['SCRIPT_NAME']));
	$isCurrentlyViewingAnAdminPage = is_admin();
	if ($isCurrentlyViewingAnAdminPage || $isLoginScreen) {
        return;
    }
    
    if (!is_404()) {
        require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
        // if we should redirect all requests then don't return.
    	$options = get_option('abj404_settings');
    	$arrayKeyExists = is_array($options) && array_key_exists('redirect_all_requests', $options);
    	if ($arrayKeyExists && $options['redirect_all_requests'] == 1) {
    		require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
    		$connector = ABJ_404_Solution_WordPress_Connector::getInstance();
    		$connector->processRedirectAllRequests();
    		return;
    	}
    	
    	/** If we're currently redirecting to a custom 404 page and we are about to show page
    	 * suggestions then update the URL displayed to the user. */
    	$cookieName = ABJ404_PP . '_REQUEST_URI';
    	$cookieName .= '_UPDATE_URL';
    	$queryParamName = ABJ404_PP . '_ref';

    	// Check cookie first, then query param fallback (for 301 redirects where cookies don't survive)
    	$originalURL = null;
    	if (isset($_COOKIE[$cookieName]) && !empty($_COOKIE[$cookieName])) {
    		$originalURL = $_COOKIE[$cookieName];
    	} elseif (isset($_GET[$queryParamName]) && !empty($_GET[$queryParamName])) {
    		$originalURL = urldecode($_GET[$queryParamName]);
    	}

    	if ($originalURL !== null) {

    		$cookieName404 = ABJ404_PP . '_STATUS_404';

    		if (array_key_exists($cookieName404, $_COOKIE) &&
    			$_COOKIE[$cookieName404] == 'true') {

   				// clear the cookie
    			setcookie($cookieName404, 'false', time() - 5, "/");
    			// we're going to a custom 404 page so se the status to 404.
	    		status_header(404);
    		}

	    	if (array_key_exists('update_suggest_url', $options) &&
    			isset($options['update_suggest_url']) &&
    			$options['update_suggest_url'] == 1) {

    			// clear the cookie - sanitize before writing to $_REQUEST
   				$_REQUEST[$cookieName] = sanitize_text_field($originalURL);
    			setcookie($cookieName, '', time() - 5, "/");

    			require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
    			add_action('wp_head', 'ABJ_404_Solution_ShortCode::updateURLbarIfNecessary');
    		}
    	}
    }
    if (!is_404() || is_admin()) {
    	return;
    }

    require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
    $connector = ABJ_404_Solution_WordPress_Connector::getInstance();
    return $connector->process404();
}

function abj404_dailyMaintenanceCronJobListener() {
    require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
    $abj404dao = ABJ_404_Solution_DataAccess::getInstance();
    $abj404dao->deleteOldRedirectsCron();

    $dbUpgrades = ABJ_404_Solution_DatabaseUpgradesEtc::getInstance();
    $dbUpgrades->runDatabaseMaintenanceTasks();
}
function abj404_updateLogsHitsTableListener() {
	require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
	$abj404dao = ABJ_404_Solution_DataAccess::getInstance();
	$abj404dao->createRedirectsForViewHitsTable();
}
function abj404_updatePermalinkCacheListener($maxExecutionTime, $executionCount = 1) {
	require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
	$permalinkCache = ABJ_404_Solution_PermalinkCache::getInstance();
	$permalinkCache->updatePermalinkCache($maxExecutionTime, $executionCount);
}
function abj404_rebuildNGramCacheListener($offset = 0) {
	require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
	$dbUpgrades = ABJ_404_Solution_DatabaseUpgradesEtc::getInstance();
	$dbUpgrades->rebuildNGramCacheAsync($offset);
}
function abj404_networkActivationListener() {
	require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
	ABJ_404_Solution_PluginLogic::networkActivationCronHandler();
}
function abj404_networkActivationBackgroundListener() {
	require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
	$upgradesEtc = ABJ_404_Solution_DatabaseUpgradesEtc::getInstance();
	$upgradesEtc->processMultisiteActivationBatch();
}
add_action('abj404_cleanupCronAction', 'abj404_dailyMaintenanceCronJobListener');
add_action('abj404_updateLogsHitsTableAction', 'abj404_updateLogsHitsTableListener');
add_action('abj404_updatePermalinkCacheAction', 'abj404_updatePermalinkCacheListener', 10, 2);
add_action('abj404_rebuild_ngram_cache_hook', 'abj404_rebuildNGramCacheListener', 10, 1);
add_action('abj404_network_activation_hook', 'abj404_networkActivationListener');
add_action('abj404_network_activation_background', 'abj404_networkActivationBackgroundListener');

function abj404_getUploadsDir() {
	// figure out the temp directory location.
	$uploadsDirArray = wp_upload_dir(null, false);
	$uploadsDir = $uploadsDirArray['basedir'];
	$uploadsDir .= DIRECTORY_SEPARATOR . 'temp_' . ABJ404_PP . DIRECTORY_SEPARATOR;
	return $uploadsDir;
}

/**
 * Override the locale for this plugin if user has configured a language override.
 * This allows users to use a different language for the 404 Solution plugin
 * than their WordPress site language or user language preference.
 *
 * @param string $locale The current locale.
 * @param string $domain The text domain.
 * @return string The locale to use for translation loading.
 */
function abj404_override_plugin_locale($locale, $domain) {
	// Only override for our plugin's text domain
	if ($domain === '404-solution') {
		$options = get_option('abj404_settings');

		// Check if language override is set and not empty
		if (is_array($options) && !empty($options['plugin_language_override'])) {
			return $options['plugin_language_override'];
		}
	}
	return $locale;
}
add_filter('plugin_locale', 'abj404_override_plugin_locale', 999, 2);

/** This only runs after WordPress is done enqueuing scripts. */
function abj404_loadSomethingWhenWordPressIsReady() {
	/** Load the text domain for translation of the plugin. */
	$options = get_option('abj404_settings');
	$override_locale = (is_array($options) && !empty($options['plugin_language_override']))
		? $options['plugin_language_override'] : '';

	if (!empty($override_locale)) {
		// Directly load the specific .mo file for the override locale
		$mo_file = ABJ404_PATH . 'languages/404-solution-' . $override_locale . '.mo';
		if (file_exists($mo_file)) {
			load_textdomain('404-solution', $mo_file);
		}
	} else {
		// Use normal WordPress translation loading
		$lang_dir = dirname(plugin_basename(ABJ404_FILE)) . '/languages';
		load_plugin_textdomain('404-solution', false, $lang_dir);
	}

	// make debugging easier on localhost etc	
	$serverName = array_key_exists('SERVER_NAME', $_SERVER) ? $_SERVER['SERVER_NAME'] : (array_key_exists('HTTP_HOST', $_SERVER) ? $_SERVER['HTTP_HOST'] : '(not found)');
	$serverNameIsInTheWhiteList = in_array($serverName, $GLOBALS['abj404_whitelist']);
	
	if ($serverNameIsInTheWhiteList && function_exists('wp_get_current_user')) {
	    require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
		$abj404logic = ABJ_404_Solution_PluginLogic::getInstance();
		if ($abj404logic->userIsPluginAdmin()) {
			$GLOBALS['abj404_display_errors'] = true;
		}
	}

	$action = isset($_GET['action']) ? sanitize_text_field($_GET['action']) : (isset($_POST['action']) ? sanitize_text_field($_POST['action']) : null);
	if ($action === 'exportRedirects') {
	    require_once(plugin_dir_path( __FILE__ ) . "includes/Loader.php");
		$abj404logic = ABJ_404_Solution_PluginLogic::getInstance();
		$abj404logic->handleActionExport();
	}
}
add_action('init', 'abj404_loadSomethingWhenWordPressIsReady');