functions.php

<?php

/**
 * Main entry point for Upfront core
 *
 * This is where we set up Upfront main class
 * which handles core bootstrap and execution context.
 */

require_once(dirname(__FILE__) . '/library/upfront_functions.php');
require_once(dirname(__FILE__) . '/library/upfront_functions_theme.php');
require_once(dirname(__FILE__) . '/library/class_upfront_cache_utils.php');
require_once(dirname(__FILE__) . '/library/class_upfront_permissions.php');
require_once(dirname(__FILE__) . '/library/class_upfront_registry.php');
require_once(dirname(__FILE__) . '/library/class_upfront_logger.php');
require_once(dirname(__FILE__) . '/library/class_upfront_debug.php');
require_once(dirname(__FILE__) . '/library/class_upfront_behavior.php');
require_once(dirname(__FILE__) . '/library/class_upfront_http_response.php');
require_once(dirname(__FILE__) . '/library/class_upfront_server.php');
require_once(dirname(__FILE__) . '/library/class_upfront_model.php');
require_once(dirname(__FILE__) . '/library/class_upfront_theme_style.php');
require_once(dirname(__FILE__) . '/library/class_upfront_module_loader.php');
require_once(dirname(__FILE__) . '/library/class_upfront_theme.php');
require_once(dirname(__FILE__) . '/library/class_upfront_grid.php');
require_once(dirname(__FILE__) . '/library/class_upfront_style_preprocessor.php');
require_once(dirname(__FILE__) . '/library/class_upfront_output.php');
require_once(dirname(__FILE__) . '/library/class_upfront_endpoint.php');
require_once(dirname(__FILE__) . '/library/class_upfront_media.php');
require_once(dirname(__FILE__) . '/library/class_ufront_ufc.php');
require_once(dirname(__FILE__) . '/library/class_upfront_codec.php');
require_once(dirname(__FILE__) . '/library/class_upfront_compat.php');
require_once(dirname(__FILE__) . '/library/class_upfront_postpart.php');
require_once(dirname(__FILE__) . '/library/class_upfront_admin.php');
require_once(dirname(__FILE__) . '/library/class_upfront_compression.php');


Upfront_Behavior::debug()->set_baseline();

/**
 * Main class
 */
class Upfront {

	/**
	 * Theme text domain
	 *
	 * @var string
	 */
	const TextDomain = "upfront";

	/**
	 * List of files to exclude in scanning
	 *
	 * @TODO refactor var name and location
	 *
	 * @var array
	 */
	public static $Excluded_Files = array(".", "..", ".DS_Store");

	/**
	 * Servers to load automatically
	 *
	 * @var array
	 */
	private $_servers = array(
		'ajax',
		'javascript_main',
		'stylesheet_main',
		'stylesheet_editor',
		'element_styles',
	);

	/**
	 * Debugger instance
	 *
	 * @var object
	 */
	private $_debugger;

	/**
	 * Instantiate class - never to the outsiders
	 */
	private function __construct () {
		$this->_debugger = Upfront_Debug::get_debugger();
		$servers = apply_filters('upfront-servers', $this->_servers);
		foreach ($servers as $component) $this->_run_server($component);
		Upfront_ModuleLoader::serve();
		do_action('upfront-core-initialized');
	}

	/**
	 * Public spawning interface
	 */
	public static function serve () {
		$me = new self;
		$me->_add_hooks();
		$me->_add_supports();
	}

	/**
	 * Add basic set of hooks
	 */
	private function _add_hooks () {
		if (Upfront_Behavior::compression()->get_option('freeze')) {
			Upfront_DependencyCache_Server::serve();
		}

		add_action('wp_enqueue_scripts', array($this, 'enqueue_jquery'), 0);
		add_filter('body_class', array($this, 'inject_grid_scope_class'));
		add_action('wp_head', array($this, "inject_global_dependencies"), 0);
		add_action('wp_footer', array($this, "inject_upfront_dependencies"), 99);
		add_action('upfront-core-wp_dependencies', array($this, "inject_core_wp_dependencies"), 99);

		add_action('admin_bar_menu', array($this, 'add_edit_menu'), 85);
		add_action('wp_ajax_upfront_log_client_error', array($this, 'log_client_error'));

		if (is_admin()) {
			require_once(dirname(__FILE__) . '/library/servers/class_upfront_admin.php');
			if (class_exists('Upfront_Server_Admin')) Upfront_Server_Admin::serve();
		}

		if ( is_rtl() ) {
			add_action('wp_head', array($this, "inject_rtl_dependencies"), 99);
		}

	}

	/**
	 * Ensure direct head scripts from Upfront and ClassicPress can use jQuery.
	 */
	public function enqueue_jquery () {
		wp_enqueue_script('jquery');
		wp_scripts()->add_data('jquery', 'group', 0);
	}

	/**
	 * Set up parent and child theme text domains
	 */
	public static function load_textdomain () {
		$path = untrailingslashit(self::get_root_dir()) . '/languages';
		$locale = apply_filters('theme_locale', determine_locale(), self::TextDomain);
		$mofile = $path . '/' . self::TextDomain . '-' . $locale . '.mo';

		if (is_readable($mofile)) {
			load_textdomain(self::TextDomain, $mofile, $locale);
		} else {
			load_theme_textdomain(self::TextDomain, $path);
		}

		// Now let's try the child theme...
		$current = wp_get_theme();
		$parent = $current->parent();
		if (empty($parent)) return false; // Current theme is not a child theme, carry on...
		if ('upfront' !== $parent->get_template()) return false; // Not an Upfront child, carry on...
		$child_domain = $current->get('TextDomain');
		if (!empty($child_domain) && 'upfront' !== $child_domain) {
			load_child_theme_textdomain($child_domain, get_stylesheet_directory() . '/languages');
		}

	}

	/**
	 * Add theme extra features
	 */
	private function _add_supports () {
		add_theme_support('post-thumbnails');
		add_theme_support('title-tag'); // Let WP deal with our theme titles
		register_nav_menu('default', __('Standard', 'upfront'));
		// Do widget text
		$do_widget_text = apply_filters(
			'upfront-shortcode-enable_in_widgets',
			(defined('UPFRONT_DISABLE_WIDGET_TEXT_SHORTCODES') && UPFRONT_DISABLE_WIDGET_TEXT_SHORTCODES ? false : true)
		);
		if ($do_widget_text) {
			add_filter('widget_text', 'do_shortcode');
		}
	}

	/**
	 * Instantiate auto-bootable server
	 *
	 * @param string $comp Server to boot
	 */
	private function _run_server ($comp) {
		$class = Upfront_Server::name_to_class($comp);
		if (!$class) return false;
		call_user_func(array($class, 'serve'));
	}

	/**
	 * Gets parent theme root URL
	 *
	 * @return string
	 */
	public static function get_root_url () {
		return get_template_directory_uri();
	}

	/**
	 * Gets parent theme root path
	 *
	 * @return string
	 */
	public static function get_root_dir () {
		return get_template_directory();
	}

	/**
	 * Inject admin toolbar menu entry
	 *
	 * @param object $wp_admin_bar Toolbar
	 */
	public function add_edit_menu ($wp_admin_bar) {
		if (!Upfront_Permissions::current(Upfront_Permissions::BOOT)) return false;

		$edit_url = home_url('/?editmode=true', is_ssl() ? "https" : null);
		$item = array(
			'id' => 'upfront-edit_layout',
			'title' => '<span class="ab-icon"></span><span class="ab-label">' . __('Upfront', 'upfront') . '</span>',
			'href' => $edit_url,
			'meta' => array(
				'class' => 'upfront-edit_layout upfront-editable_trigger',
				'onclick' => 'if (!this.classList.contains("active")) { event.stopImmediatePropagation(); window.location.assign(this.href); return false; }',
				'html' => '<style>#wp-admin-bar-upfront-edit_layout > .ab-item { opacity: 1 !important; cursor: pointer !important; }</style>',
			),
		);
		$permalinks_on = get_option('permalink_structure');

		if (!$permalinks_on) {
			// We're checking WP priv directly because we need an admin for this
			if (current_user_can('manage_options')) {
				$item['href'] = admin_url('/options-permalink.php');
				unset($item['meta']);
			} else {
				$item = array(); // No such thing for non-admins
			}
		}

		if (!empty($item)) {
			$wp_admin_bar->add_menu($item);
		}

		// Change the existing nodes
		$nodes = $wp_admin_bar->get_nodes();
		if (!empty($nodes) && is_array($nodes)) {
			foreach ($nodes as $node) {
				if (!empty($node->href) && preg_match('/customize\.php/', $node->href)) {
					$node->href = !empty($node->id) && 'customize-themes' === $node->id // WordPress doubles down on customizer endpoint for themes list too...
						? admin_url('themes.php') // ... not gonna happen
						: home_url('?editmode=true')
					;
				}
				$wp_admin_bar->add_node($node);
			}
		}

		// Action hook here, so other stuff can add its bar items
		// (most notably, the exporter)
		do_action('upfront-admin_bar-process', $wp_admin_bar, $item);
	}

	public function log_client_error () {
		if (!Upfront_Permissions::current(Upfront_Permissions::BOOT)) wp_die(0);
		$message = isset($_POST['message']) ? sanitize_text_field(wp_unslash($_POST['message'])) : '';
		if ($message) error_log('Upfront client error: ' . $message);
		wp_die(1);
	}

	/**
	 * Appends grid scope class to the classes array
	 *
	 * @param array $cls Classes up to here
	 *
	 * @return array
	 */
	function inject_grid_scope_class ($cls) {
		$grid = Upfront_Grid::get_grid();
		$cls[] = $grid->get_grid_scope();
		return $cls;
	}

	/**
	 * Handles core WP front-end dependencies injection
	 */
	public function inject_core_wp_dependencies () {
		$deps = Upfront_CoreDependencies_Registry::get_instance();

		if (Upfront_Behavior::compression()->has_experiments()) {
			if (defined('DOING_AJAX') && DOING_AJAX) {
			} else {
				$deps->add_script(admin_url('admin-ajax.php?action=wp_scripts'));
			}
		}
		wp_enqueue_style('upfront-nouislider', self::get_root_url() . '/scripts/vendor/nouislider/nouislider.min.css', array(), '15.8.1');
		wp_enqueue_style('upfront-flatpickr', self::get_root_url() . '/scripts/vendor/flatpickr/flatpickr.min.css', array(), '4.6.13');

		/**
		 * Todo Sam: make it cleaner
		 */
		wp_enqueue_script("wp_shortcode", "/wp-includes/js/shortcode.js", array("underscore"));
	}

	/**
	 * Handles global FE dependencies injection
	 */
	function inject_global_dependencies () {
		$deps = Upfront_CoreDependencies_Registry::get_instance();
		wp_enqueue_script('jquery');
		if (Upfront_Permissions::current(Upfront_Permissions::BOOT) && wp_script_is('backbone', 'enqueued')) {
			wp_add_inline_script('backbone', 'if (window.define && window.define.amd) { window._upfrontDefineAmd = window.define.amd; window.define.amd = false; }', 'before');
			wp_add_inline_script('backbone', 'if (window._upfrontDefineAmd) { window.define.amd = window._upfrontDefineAmd; delete window._upfrontDefineAmd; }', 'after');
		}

		// Basic styles for upfront to work are always loaded.
		$global_style = Upfront_Behavior::compression()->has_experiments()
			? '/styles/global.min.css'
			: '/styles/global.css'
		;
		//wp_enqueue_style('upfront-global', self::get_root_url() . $global_style, array(), Upfront_ChildTheme::get_version());
		$deps->add_header_style(self::get_root_url() . $global_style);

		if (!Upfront_Permissions::current(Upfront_Permissions::BOOT)) {
			// Don't queue the front grid if has permission to boot Upfront, queue editor grid instead
			//wp_enqueue_style('upfront-front-grid', admin_url('admin-ajax.php?action=upfront_load_grid'), array(), Upfront_ChildTheme::get_version());
			$deps->add_header_style(admin_url('admin-ajax.php?action=upfront_load_grid'));
		}

		if (Upfront_Permissions::current(Upfront_Permissions::BOOT)) {
			do_action('upfront-core-wp_dependencies');

			//wp_enqueue_style('upfront-editor-interface', self::get_root_url() . ( $this->_debugger->is_dev()  ?  '/styles/editor-interface.css' : '/styles/editor-interface.min.css' ) , array(), Upfront_ChildTheme::get_version());
			$deps->add_header_style(self::get_root_url() . ( $this->_debugger->is_dev()  ?  '/styles/editor-interface.css' : '/styles/editor-interface.min.css' ));

			$link_urls = array(
				admin_url('admin-ajax.php?action=upfront_load_editor_grid'),
				self::get_root_url() . '/scripts/chosen/chosen.min.css',
				self::get_root_url() . '/styles/font-icons.css',
			);
			foreach ($link_urls as $url) {
				$deps->add_style($url);
			}
			$deps->add_font('Open Sans', array(
				'300',
				'400',
				'600',
				'700',
				'400italic',
				'600italic',
			));

			add_action('wp_footer', array($this, 'add_responsive_css'));
		}
	}

	/**
	 * Handles Upfront editor-specific FE dependencies injection
	 */
	function inject_upfront_dependencies () {

		if (!Upfront_Permissions::current(Upfront_Permissions::BOOT)) {
			do_action('upfront-core-inject_dependencies'); // Also trigger the dependencies injection hook
			return false; // Do not inject for users that can't use this
		}
		if (empty($_GET['editmode']) && !apply_filters('upfront-load-editor-dependencies', false)) {
			do_action('upfront-core-inject_dependencies');
			return false;
		}

		$url = self::get_root_url();

		// Boot Edit Mode if requested by querystring or a virtual editor page.
		if (apply_filters('upfront-auto-boot-editor', true)) {
			echo upfront_boot_editor_trigger(apply_filters('upfront-editor-boot-mode', ''));
		}

		$storage_key = apply_filters('upfront-data-storage-key', Upfront_Layout::STORAGE_KEY);
		$save_storage_key = $storage_key;
		$is_ssl = is_ssl() ? '&ssl=1' : '';

		if (Upfront_Behavior::debug()->is_dev() && current_user_can('switch_themes') && apply_filters('upfront-enable-dev-saving', true)) {
			$save_storage_key .= '_dev';
		}

		$upfront = $theme = wp_get_theme('upfront');
		$main_source = 'scripts/setup.js';
		$script_urls = array();

		$require_source = 'scripts/require.js';
		$require_source_path = dirname(__FILE__) . '/' . $require_source;
		$script_urls[] = add_query_arg('mtime', filemtime($require_source_path), "{$url}/{$require_source}");
		$locale = function_exists('determine_locale') ? determine_locale() : get_locale();
		$l10n_path = dirname(__FILE__) . '/languages/upfront-' . $locale . '.mo';
		$main_args = array(
			'action' => 'upfront_load_main',
			'ufver' => $upfront->version,
			'locale' => $locale,
			'l10n' => is_file($l10n_path) ? filemtime($l10n_path) : 0,
		);
		if (is_ssl()) $main_args['ssl'] = 1;
		$script_urls[] = add_query_arg($main_args, admin_url('admin-ajax.php'));
		$main_source_path = dirname(__FILE__) . '/' . $main_source;
		$script_urls[] = add_query_arg('mtime', filemtime($main_source_path), "{$url}/{$main_source}");

		$deps = Upfront_CoreDependencies_Registry::get_instance();
		foreach ($script_urls as $url) {
			$deps->add_script($url);
		}

		$layout_post_data = json_encode(array(
			'layout' => Upfront_EntityResolver::get_entity_ids(),
			'post_id' => (is_singular() ? apply_filters('upfront-data-post_id', Upfront_Output::get_post_id()) : false),
		));

		echo '<script type="text/javascript">
			var _upfront_post_data=' . $layout_post_data . ';
			var _upfront_storage_key = "' . esc_js($storage_key) . '";
			var _upfront_save_storage_key = "' . esc_js($save_storage_key) . '";
			var _upfront_stylesheet = "' . esc_js(get_stylesheet()) . '";
			var _upfront_debug_mode = ' . (int)Upfront_Behavior::debug()->is_debug() . ';
			var _upfront_please_hold_on = ' . json_encode(__('Bitte halte noch ein kleines bisschen länger durch.', 'upfront')) . ';
		</script>';
		echo <<<EOAdditivemarkup
	<div id="sidebar-ui" class="upfront-ui"></div>
	<div id="settings" style="display:none"></div>
	<div id="contextmenu" style="display:none"></div>
EOAdditivemarkup;

		do_action('upfront-core-inject_dependencies');
		echo '<script type="text/javascript">
			(function () {
				function reportUpfrontError(message) {
					message = String(message || "Unknown client error");
					var loadingText = document.querySelector(".upfront-loading-text");
					if (loadingText) loadingText.textContent = "Upfront konnte nicht laden: " + message;
					if (window.console && console.error) console.error("Upfront konnte nicht laden:", message);
					if (window.jQuery) jQuery.post(' . json_encode(admin_url('admin-ajax.php')) . ', {
						action: "upfront_log_client_error",
						message: message
					});
				}

				window.addEventListener("error", function (event) {
					reportUpfrontError(event.message + (event.filename ? " in " + event.filename + ":" + event.lineno : ""));
				});
				window.addEventListener("unhandledrejection", function (event) {
					reportUpfrontError(event.reason && event.reason.message ? event.reason.message : event.reason);
				});
				if (window.requirejs) {
					requirejs.onError = function (error) {
						var modules = error.requireModules && error.requireModules.length ? " [" + error.requireModules.join(", ") + "]" : "";
						reportUpfrontError((error.message || error.requireType || error) + modules);
					};
				}
				if (window.jQuery) {
					jQuery(document).ajaxError(function (event, xhr, settings, error) {
						if (!settings || String(settings.data || "").indexOf("upfront_") === -1) return;
						reportUpfrontError("AJAX " + xhr.status + " " + (error || xhr.statusText));
					});
				}
			})();
		</script>';
	}

	/**
	 * Injects responsive CSS
	 */
	function add_responsive_css () {
		include(self::get_root_dir() . '/styles/editor-interface-responsive.html');
	}

	/**
	 * Injects dependencies for rtl languages
	 */
	function inject_rtl_dependencies () {

		wp_enqueue_style('upfront-global-rtl', self::get_root_url() . ( $this->_debugger->is_dev() ? "/styles/global-rtl.css" : "/styles/global-rtl.min.css" ), array(), Upfront_ChildTheme::get_version());
	}
}
add_action('init', array('Upfront', 'serve'), 0);
add_action('after_setup_theme', array('Upfront', "load_textdomain"));

/**
 * Filters wp caption atts to hide the caption in case show_caption is equal  to "0"
 */
add_filter("shortcode_atts_caption", 'uf_shortcode_atts_caption', 10, 3);

/**
 * Filters wp captions atts to remove the caption in case show_caption is equal to "0"
 *
 * @param array $out The output array of shortcode attributes.
 * @param array $pairs The supported attributes and their defaults.
 * @param array $atts The user defined shortcode attributes.
 * @return mixed
 */
function uf_shortcode_atts_caption ($out, $pairs, $atts) {

	if (isset( $atts['show_caption'] ) && "0" == $atts['show_caption']) {
		$out['caption'] = "&nbsp;";
	}

	return $out;
}


/**
 * Filters image caption shortcode to generate uf caption specific markup
 */
add_filter("img_caption_shortcode", "uf_image_caption_shortcode", 10, 3);
/**
 * Uses img_caption_shortcode to add support for UF image variants
 *
 * @param string $out Out
 * @param array $attr Attributes attributed to the shortcode.
 * @param string $content Shortcode content.
 *
 * @return string|void
 */
function uf_image_caption_shortcode ($out, $attr, $content) {

	$is_wp_cation = strpos($attr["id"], "uinsert-" ) === false;

	if ($is_wp_cation) return; // returning null let's wp do it's own logic and rendering for caption shortcode

	$image_reg = preg_match('/src="([^"]+)"/', $content, $image_arr);
	$href_reg = preg_match('/href="([^"]+)"/', $content, $anchor_arr);

	$data = (object) shortcode_atts( array(
		'id'	  => '',
		'caption' => '',
		'class'   => '',
		'uf_variant' => '',
		'uf_isLocal' => true,
		'uf_show_caption' => true,
		'image' => $image_reg ? $image_arr[1] : "",
		'linkUrl' => $href_reg ? $anchor_arr[1] : "",

	), $attr, 'caption' );

	 return Upfront_Post_Data_PartView::get_post_image_markup($data);

}

/**
 * Loads iconfont in admin to display toolbar icon.
 */
function uf_admin_bar_styles() {
	wp_enqueue_style( 'uf-font-icons', get_template_directory_uri() . '/styles/font-icons.css');
}
add_action( 'admin_enqueue_scripts', 'uf_admin_bar_styles' );

/**
 * Registers Upfront avatar source option under Settings > General.
 */
function uf_register_general_avatar_settings() {
	register_setting(
		'general',
		'upfront_external_avatars_enabled',
		array(
			'type' => 'integer',
			'default' => 0,
			'sanitize_callback' => 'uf_sanitize_external_avatars_enabled',
		)
	);

	add_settings_field(
		'upfront_external_avatars_enabled',
		esc_html__('Upfront: Externe Avatare', 'upfront'),
		'uf_render_external_avatars_setting_field',
		'general'
	);
}
add_action('admin_init', 'uf_register_general_avatar_settings');

/**
 * Sanitizes external avatar setting value.
 *
 * @param mixed $value Raw value from the settings form.
 *
 * @return int 1 if enabled, 0 otherwise.
 */
function uf_sanitize_external_avatars_enabled($value) {
	return !empty($value) ? 1 : 0;
}

/**
 * Renders external avatars checkbox in Settings > General.
 */
function uf_render_external_avatars_setting_field() {
	$value = (int) get_option('upfront_external_avatars_enabled', 0);
	?>
	<label for="upfront_external_avatars_enabled">
		<input
			type="checkbox"
			name="upfront_external_avatars_enabled"
			id="upfront_external_avatars_enabled"
			value="1"
			<?php checked(1, $value); ?>
		/>
		<?php esc_html_e('Externe Avatar-Dienste (z.B. Gravatar) fuer Upfront laden', 'upfront'); ?>
	</label>
	<p class="description">
		<?php esc_html_e('Standard ist AUS. Wenn deaktiviert, nutzt Upfront nur lokale Platzhalterbilder.', 'upfront'); ?>
	</p>
	<?php
}

/**
 * Gets rid of the admin notice and declares support for Woo
 */
function uf_add_woocommerce_support() {
	add_theme_support('woocommerce');
}
add_action('after_setup_theme', 'uf_add_woocommerce_support');

/**
 * Temporary targeted debug trace for failing Upfront AJAX model requests.
 * Writes to wp-content/upfront-ajax-debug.log regardless of PHP's global error_log target.
 */
function uf_trace_upfront_ajax_model_requests() {
	if (!defined('DOING_AJAX') || !DOING_AJAX) return;
	if (empty($_POST['action']) || $_POST['action'] !== 'upfront-wp-model') return;

	$trace_id = substr(md5(uniqid('uf-ajax-', true)), 0, 12);
	$start = microtime(true);
	$log_file = WP_CONTENT_DIR . '/upfront-ajax-debug.log';
	$model_action = isset($_POST['model_action']) ? (string)$_POST['model_action'] : '';
	$keys = implode(',', array_keys((array)$_POST));

	error_log(sprintf("[%s] start uri=%s action=%s model_action=%s keys=%s\n", $trace_id, isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '', isset($_POST['action']) ? $_POST['action'] : '', $model_action, $keys), 3, $log_file);

	register_shutdown_function(function () use ($trace_id, $start, $log_file, $model_action) {
		$elapsed = round((microtime(true) - $start) * 1000, 2);
		$last = error_get_last();
		if ($last && in_array($last['type'], array(E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR), true)) {
			error_log(sprintf("[%s] fatal model_action=%s duration_ms=%s type=%s msg=%s file=%s line=%s\n", $trace_id, $model_action, $elapsed, $last['type'], $last['message'], $last['file'], $last['line']), 3, $log_file);
		}
		else {
			error_log(sprintf("[%s] finish model_action=%s duration_ms=%s\n", $trace_id, $model_action, $elapsed), 3, $log_file);
		}
	});
}
add_action('init', 'uf_trace_upfront_ajax_model_requests', 1);