<?php

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/**

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* Class-based version switching functionality for the Code Snippets plugin.

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*

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* Converted from procedural `version-switch.php` to an OO class `Version_Switch`.

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*

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* @package Code_Snippets

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* @subpackage Settings

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*/

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namespace Code_Snippets\Settings;

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// Configuration constants for version switching

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const VERSION_CACHE_KEY = 'code_snippets_available_versions';

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const PROGRESS_KEY = 'code_snippets_version_switch_progress';

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const VERSION_CACHE_DURATION = HOUR_IN_SECONDS;

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const PROGRESS_TIMEOUT = 5 * MINUTE_IN_SECONDS;

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const WORDPRESS_API_ENDPOINT = 'https://api.wordpress.org/plugins/info/1.2/?action=plugin_information&slug=code-snippets';

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class Version_Switch {

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/**

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* Initialize hook registrations.

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* Call this after the file is required.

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*/

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public static function init(): void {

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add_action( 'wp_ajax_code_snippets_switch_version', [ __CLASS__, 'ajax_switch_version' ] );

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add_action( 'wp_ajax_code_snippets_refresh_versions', [ __CLASS__, 'ajax_refresh_versions' ] );

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}

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public static function get_available_versions(): array {

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$versions = get_transient( VERSION_CACHE_KEY );

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if ( false === $versions ) {

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$response = wp_remote_get( WORDPRESS_API_ENDPOINT );

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if ( is_wp_error( $response ) ) {

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return [];

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}

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$body = wp_remote_retrieve_body( $response );

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$data = json_decode( $body, true );

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if ( ! $data || ! isset( $data['versions'] ) ) {

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return [];

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}

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// Filter out 'trunk' and sort versions

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$versions = [];

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foreach ( $data['versions'] as $version => $download_url ) {

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if ( 'trunk' !== $version ) {

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$versions[] = [

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'version' => $version,

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'url' => $download_url,

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];

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}

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}

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// Sort versions in descending order

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usort( $versions, function( $a, $b ) {

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return version_compare( $b['version'], $a['version'] );

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});

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// Cache for configured duration

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set_transient( VERSION_CACHE_KEY, $versions, VERSION_CACHE_DURATION );

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}

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return $versions;

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}

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public static function get_current_version(): string {

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return defined( 'CODE_SNIPPETS_VERSION' ) ? CODE_SNIPPETS_VERSION : '0.0.0';

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}

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public static function is_version_switch_in_progress(): bool {

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return get_transient( PROGRESS_KEY ) !== false;

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}

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public static function clear_version_caches(): void {

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delete_transient( VERSION_CACHE_KEY );

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delete_transient( PROGRESS_KEY );

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}

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public static function validate_target_version( string $target_version, array $available_versions ): array {

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if ( empty( $target_version ) ) {

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return [

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'success' => false,

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'message' => __( 'No target version specified.', 'code-snippets' ),

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'download_url' => '',

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];

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}

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foreach ( $available_versions as $version_info ) {

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if ( $version_info['version'] === $target_version ) {

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return [

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'success' => true,

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'message' => '',

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'download_url' => $version_info['url'],

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];

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}

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}

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return [

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'success' => false,

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'message' => __( 'Invalid version specified.', 'code-snippets' ),

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'download_url' => '',

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];

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}

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public static function create_error_response( string $message, string $technical_details = '' ): array {

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if ( ! empty( $technical_details ) ) {

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if ( function_exists( 'error_log' ) ) {

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error_log( sprintf( 'Code Snippets version switch error: %s. Details: %s', $message, $technical_details ) );

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}

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}

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return [

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'success' => false,

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'message' => $message,

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];

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}

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public static function perform_version_install( string $download_url ) {

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if ( ! function_exists( 'wp_update_plugins' ) ) {

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require_once ABSPATH . 'wp-admin/includes/update.php';

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}

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if ( ! function_exists( 'show_message' ) ) {

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require_once ABSPATH . 'wp-admin/includes/misc.php';

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}

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if ( ! class_exists( 'Plugin_Upgrader' ) ) {

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require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';

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}

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$update_handler = new \WP_Ajax_Upgrader_Skin();

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$upgrader = new \Plugin_Upgrader( $update_handler );

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global $code_snippets_last_update_handler, $code_snippets_last_upgrader;

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$code_snippets_last_update_handler = $update_handler;

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$code_snippets_last_upgrader = $upgrader;

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return $upgrader->install( $download_url, [

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'overwrite_package' => true,

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'clear_update_cache' => true,

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] );

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}

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public static function extract_handler_messages( $update_handler, $upgrader ): string {

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$handler_messages = '';

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if ( isset( $update_handler ) ) {

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if ( method_exists( $update_handler, 'get_errors' ) ) {

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$errs = $update_handler->get_errors();

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if ( $errs instanceof \WP_Error && $errs->has_errors() ) {

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$handler_messages .= implode( "\n", $errs->get_error_messages() );

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}

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}

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if ( method_exists( $update_handler, 'get_error_messages' ) ) {

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$em = $update_handler->get_error_messages();

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if ( $em ) {

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$handler_messages .= "\n" . $em;

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}

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}

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if ( method_exists( $update_handler, 'get_upgrade_messages' ) ) {

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$upgrade_msgs = $update_handler->get_upgrade_messages();

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if ( is_array( $upgrade_msgs ) ) {

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$handler_messages .= "\n" . implode( "\n", $upgrade_msgs );

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} elseif ( $upgrade_msgs ) {

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$handler_messages .= "\n" . (string) $upgrade_msgs;

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}

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}

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}

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if ( empty( $handler_messages ) && isset( $upgrader->result ) ) {

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if ( is_wp_error( $upgrader->result ) ) {

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$handler_messages = implode( "\n", $upgrader->result->get_error_messages() );

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} else {

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$handler_messages = is_scalar( $upgrader->result ) ? (string) $upgrader->result : print_r( $upgrader->result, true );

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}

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}

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return trim( $handler_messages );

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}

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public static function log_version_switch_attempt( string $target_version, $result, string $details = '' ): void {

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if ( function_exists( 'error_log' ) ) {

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error_log( sprintf( 'Code Snippets version switch failed. target=%s, result=%s, details=%s', $target_version, var_export( $result, true ), $details ) );

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}

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}

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public static function handle_installation_failure( string $target_version, string $download_url, $install_result ): array {

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global $code_snippets_last_update_handler, $code_snippets_last_upgrader;

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$handler_messages = self::extract_handler_messages( $code_snippets_last_update_handler, $code_snippets_last_upgrader );

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self::log_version_switch_attempt( $target_version, $install_result, "URL: $download_url, Messages: $handler_messages" );

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$fallback_message = __( 'Failed to switch versions. Please try again.', 'code-snippets' );

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if ( ! empty( $handler_messages ) ) {

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$short = wp_trim_words( wp_strip_all_tags( $handler_messages ), 40, '...' );

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$fallback_message = sprintf( '%s %s', $fallback_message, $short );

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}

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return [

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'success' => false,

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'message' => $fallback_message,

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];

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}

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public static function handle_version_switch( string $target_version ): array {

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if ( ! current_user_can( 'update_plugins' ) ) {

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return self::create_error_response( __( 'You do not have permission to update plugins.', 'code-snippets' ) );

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}

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$available_versions = self::get_available_versions();

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$validation = self::validate_target_version( $target_version, $available_versions );

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if ( ! $validation['success'] ) {

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return self::create_error_response( $validation['message'] );

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}

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if ( self::get_current_version() === $target_version ) {

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return self::create_error_response( __( 'Already on the specified version.', 'code-snippets' ) );

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}

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set_transient( PROGRESS_KEY, $target_version, PROGRESS_TIMEOUT );

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$install_result = self::perform_version_install( $validation['download_url'] );

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delete_transient( PROGRESS_KEY );

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if ( is_wp_error( $install_result ) ) {

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return self::create_error_response( $install_result->get_error_message() );

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}

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if ( $install_result ) {

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delete_transient( VERSION_CACHE_KEY );

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return [

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'success' => true,

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'message' => sprintf( __( 'Successfully switched to version %s. Please refresh the page to see changes.', 'code-snippets' ), $target_version ),

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];

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}

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return self::handle_installation_failure( $target_version, $validation['download_url'], $install_result );

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}

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public static function render_version_switch_field( array $args ): void {

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$current_version = self::get_current_version();

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$available_versions = self::get_available_versions();

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$is_switching = self::is_version_switch_in_progress();

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?>

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<div class="code-snippets-version-switch">

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<p>

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<strong><?php esc_html_e( 'Current Version:', 'code-snippets' ); ?></strong>

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<span class="current-version"><?php echo esc_html( $current_version ); ?></span>

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</p>

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<?php if ( $is_switching ) : ?>

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<div class="notice notice-info inline">

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<p><?php esc_html_e( 'Version switch in progress. Please wait...', 'code-snippets' ); ?></p>

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</div>

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<?php else : ?>

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<p>

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<label for="target_version">

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<?php esc_html_e( 'Switch to Version:', 'code-snippets' ); ?>

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</label>

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<select id="target_version" name="target_version" <?php disabled( empty( $available_versions ) ); ?>>

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<option value=""><?php esc_html_e( 'Select a version...', 'code-snippets' ); ?></option>

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<?php foreach ( $available_versions as $version_info ) : ?>

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<option value="<?php echo esc_attr( $version_info['version'] ); ?>"

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<?php selected( $version_info['version'], $current_version ); ?>>

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<?php echo esc_html( $version_info['version'] ); ?>

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<?php if ( $version_info['version'] === $current_version ) : ?>

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<?php esc_html_e( ' (Current)', 'code-snippets' ); ?>

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<?php endif; ?>

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</option>

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<?php endforeach; ?>

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</select>

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</p>

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<p>

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<button type="button" id="switch-version-btn" class="button button-secondary" disabled

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<?php disabled( empty( $available_versions ) ); ?>>

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<?php esc_html_e( 'Switch Version', 'code-snippets' ); ?>

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</button>

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</p>

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<div id="version-switch-result" class="notice" style="display: none;"></div>

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<?php endif; ?>

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</div><?php

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}

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public static function ajax_switch_version(): void {

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if ( ! wp_verify_nonce( $_POST['nonce'] ?? '', 'code_snippets_version_switch' ) ) {

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wp_die( __( 'Security check failed.', 'code-snippets' ) );

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}

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if ( ! current_user_can( 'update_plugins' ) ) {

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wp_send_json_error( [

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'message' => __( 'You do not have permission to update plugins.', 'code-snippets' ),

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] );

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}

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$target_version = sanitize_text_field( $_POST['target_version'] ?? '' );

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if ( empty( $target_version ) ) {

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wp_send_json_error( [

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'message' => __( 'No target version specified.', 'code-snippets' ),

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] );

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}

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$result = self::handle_version_switch( $target_version );

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if ( $result['success'] ) {

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wp_send_json_success( $result );

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} else {

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wp_send_json_error( $result );

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}

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}

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public static function render_refresh_versions_field( array $args ): void {

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?>

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<button type="button" id="refresh-versions-btn" class="button button-secondary">

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<?php esc_html_e( 'Refresh Available Versions', 'code-snippets' ); ?>

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</button>

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<p class="description">

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<?php esc_html_e( 'Check for the latest available plugin versions from WordPress.org.', 'code-snippets' ); ?>

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</p><?php

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}

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public static function ajax_refresh_versions(): void {

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if ( ! wp_verify_nonce( $_POST['nonce'] ?? '', 'code_snippets_refresh_versions' ) ) {

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wp_die( __( 'Security check failed.', 'code-snippets' ) );

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}

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if ( ! current_user_can( 'manage_options' ) ) {

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wp_send_json_error( [

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'message' => __( 'You do not have permission to manage options.', 'code-snippets' ),

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] );

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}

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delete_transient( VERSION_CACHE_KEY );

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self::get_available_versions();

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wp_send_json_success( [

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'message' => __( 'Available versions updated successfully.', 'code-snippets' ),

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] );

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}

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public static function render_version_switch_warning(): void {

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?>

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<div id="version-switch-warning" class="notice notice-warning" style="display: none; margin-block-start: 20px;">

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<p>

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<strong><?php esc_html_e( 'Warning:', 'code-snippets' ); ?></strong>

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<?php esc_html_e( 'Switching versions may cause compatibility issues. Always backup your site before switching versions.', 'code-snippets' ); ?>

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</p>

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</div>

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<?php

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}

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}

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// Initialize hooks when the file is loaded.

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Version_Switch::init();

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