Siegel-Umzugsliste/umzugsliste.php

<?php
/**
 * Plugin Name: Umzugsliste
 * Description: Email-basiertes Möbelauswahlsystem für Siegel Umzüge
 * Version: 1.0.0
 * Author: Siegel Umzüge
 * Text Domain: siegel-umzugsliste
 * Domain Path: /languages
 */

// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

// Plugin version
define( 'UMZUGSLISTE_VERSION', '1.0.0' );
define( 'UMZUGSLISTE_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
define( 'UMZUGSLISTE_PLUGIN_URL', plugin_dir_url( __FILE__ ) );

/**
 * Load plugin text domain for translations
 */
function siegel_umzugsliste_load_textdomain() {
	load_plugin_textdomain(
		'siegel-umzugsliste',
		false,
		dirname( plugin_basename( __FILE__ ) ) . '/languages'
	);
}
add_action( 'init', 'siegel_umzugsliste_load_textdomain', 1 );

/**
 * Reload text domain on locale change
 * Workaround for WordPress core bug #39210 where switch_to_locale() doesn't reload plugin translations
 */
add_action( 'change_locale', function() {
	unload_textdomain( 'siegel-umzugsliste' );
	load_plugin_textdomain(
		'siegel-umzugsliste',
		false,
		dirname( plugin_basename( __FILE__ ) ) . '/languages'
	);
} );

/**
 * Main plugin class
 */
class Umzugsliste {

	/**
	 * Single instance of the class
	 */
	private static $instance = null;

	/**
	 * Get single instance
	 */
	public static function get_instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 * Constructor
	 */
	private function __construct() {
		$this->load_dependencies();
		$this->init_hooks();
	}

	/**
	 * Load required files
	 */
	private function load_dependencies() {
		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-cpt.php';
		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-admin-menu.php';
		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-settings.php';
		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-furniture-data.php';
		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-date-helpers.php';
		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-captcha.php';
		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-form-renderer.php';
		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-shortcode.php';
		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-email-generator.php';
		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-form-handler.php';
	}

	/**
	 * Initialize WordPress hooks
	 */
	private function init_hooks() {
		add_action( 'init', array( $this, 'init' ) );
		add_filter( 'template_include', array( $this, 'maybe_load_form_template' ) );

		// Form handler must register its init hook before init fires
		Umzugsliste_Form_Handler::get_instance();
	}

	/**
	 * Load standalone form template if current page is the configured form page
	 *
	 * @param string $template Current template path
	 * @return string Template path
	 */
	public function maybe_load_form_template( $template ) {
		if ( is_admin() || ! is_page() ) {
			return $template;
		}

		$use_standalone = false;

		// Check configured form page ID
		$form_page_id = (int) get_option( 'umzugsliste_form_page_id', 0 );
		if ( $form_page_id > 0 && is_page( $form_page_id ) ) {
			$use_standalone = true;
		}

		// Fallback: check if current page contains the [umzugsliste] shortcode
		if ( ! $use_standalone ) {
			$post = get_queried_object();
			if ( $post && isset( $post->post_content ) && has_shortcode( $post->post_content, 'umzugsliste' ) ) {
				$use_standalone = true;
			}
		}

		if ( $use_standalone ) {
			$custom_template = UMZUGSLISTE_PLUGIN_DIR . 'templates/form-page.php';
			if ( file_exists( $custom_template ) ) {
				return $custom_template;
			}
		}

		return $template;
	}

	/**
	 * Initialize plugin components
	 */
	public function init() {
		// Initialize and register CPT
		$cpt = Umzugsliste_CPT::get_instance();
		$cpt->register_post_type();

		// Initialize admin menu
		if ( is_admin() ) {
			Umzugsliste_Admin_Menu::get_instance();
		}

		// Initialize settings
		Umzugsliste_Settings::get_instance();

		// Initialize shortcode
		Umzugsliste_Shortcode::get_instance();
	}
}

/**
 * Activation hook
 */
function umzugsliste_activate() {
	// Initialize CPT to register post type
	require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-cpt.php';
	Umzugsliste_CPT::get_instance();

	// Auto-create form page if none exists
	$form_page_id = (int) get_option( 'umzugsliste_form_page_id', 0 );
	if ( $form_page_id <= 0 || ! get_post( $form_page_id ) ) {
		$page_id = wp_insert_post( array(
			'post_title'   => 'Umzugsliste',
			'post_content' => '',
			'post_status'  => 'publish',
			'post_type'    => 'page',
		) );
		if ( $page_id && ! is_wp_error( $page_id ) ) {
			update_option( 'umzugsliste_form_page_id', $page_id );
		}
	}

	// Flush rewrite rules
	flush_rewrite_rules();
}
register_activation_hook( __FILE__, 'umzugsliste_activate' );

/**
 * Deactivation hook
 */
function umzugsliste_deactivate() {
	// Flush rewrite rules
	flush_rewrite_rules();
}
register_deactivation_hook( __FILE__, 'umzugsliste_deactivate' );

/**
 * Initialize plugin
 */
function umzugsliste_init() {
	return Umzugsliste::get_instance();
}
add_action( 'plugins_loaded', 'umzugsliste_init' );