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<?php
/**
 * Templates operations: CPCFF_TEMPLATES class
 *
 * Implements the access to forms templates.
 *
 * @package CFF.
 * @since 1.0.175
 */

if ( ! class_exists( 'CPCFF_TEMPLATES' ) ) {
	/**
	 * Handles the forms templates.
	 */
	class CPCFF_TEMPLATES {

/**
		 * Flag to know if the templates directory was checked and the templates loaded
		 * Metaclass property.
		 *
		 * @var bool $_are_templates_loaded default false
		 */
		private static $_are_templates_loaded = false;

/**
		 * Templates list
		 * Metaclass property.
		 *
		 * @var array $_templates_list default empty array
		 */
		private static $_templates_list = array();

/**
		 * List of templates whose resources were enqueued or sent to the browser
		 * Metaclass property.
		 *
		 * @var array $_enqueued_list default empty array
		 */
		private static $_enqueued_list = array();

/**
		 * Loads the templates list
		 *
		 * Walks through the "templates" directory for reading and parsing the corresponding config.ini files to identify the
		 * the styles files, the javascript files, the templates' thumbnails, and the prefixes to identify the templates
		 * and grouping the CSS rules to apply for the templates.
		 *
		 * @return array of associative arrays with the templates attributess.
		 */
		public static function load_templates() {
			if ( ! self::$_are_templates_loaded ) {
				self::$_are_templates_loaded = true;
				$tpls_dir_paths              = array(
					array(
						'path' => CP_CALCULATEDFIELDSF_BASE_PATH . '/templates',
						'url'  => plugins_url( 'templates', CP_CALCULATEDFIELDSF_MAIN_FILE_PATH ),
					),
				);

$upload_dir = wp_upload_dir();

if (
					! $upload_dir['error'] &&
					file_exists( $upload_dir['basedir'] . '/calculated-fields-form/templates' ) &&
					is_dir( $upload_dir['basedir'] . '/calculated-fields-form/templates' )
				) {
					$tpls_dir_paths[] = array(
						'path' => $upload_dir['basedir'] . '/calculated-fields-form/templates',
						'url'  => $upload_dir['baseurl'] . '/calculated-fields-form/templates',
					);
				}

foreach ( $tpls_dir_paths as $path ) {
					$tpls_dir = dir( $path['path'] );
					while ( false !== ( $entry = $tpls_dir->read() ) ) {
						if (
							'.' != $entry &&
							'..' != $entry &&
							is_dir( $tpls_dir->path . '/' . $entry ) &&
							file_exists( $tpls_dir->path . '/' . $entry . '/config.ini' )
						) {
							if (
								( function_exists( 'parse_ini_file' ) && ( $ini_array = parse_ini_file( $tpls_dir->path . '/' . $entry . '/config.ini' ) ) != false ) || ( function_exists( 'parse_ini_string' ) && ( $ini_array = parse_ini_string( file_get_contents( $tpls_dir->path . '/' . $entry . '/config.ini' ) ) ) != false ) // phpcs:ignore Squiz.PHP.DisallowMultipleAssignments
							) {
								if ( isset( $ini_array['prefix'] ) && ( $prefix = trim( $ini_array['prefix'] ) ) != '' ) { // phpcs:ignore Squiz.PHP.DisallowMultipleAssignments
									// Url to the CSS file.
									if ( ! empty( $ini_array['file'] ) ) {
										$ini_array['file'] = $path['url'] . '/' . $entry . '/' . $ini_array['file'];
									}

// Url to the JS file.
									if ( ! empty( $ini_array['js'] ) ) {
										$ini_array['js'] = $path['url'] . '/' . $entry . '/' . $ini_array['js'];
									}

// Url to the thumbnail file.
									if ( ! empty( $ini_array['thumbnail'] ) ) {
										$ini_array['thumbnail'] = $path['url'] . '/' . $entry . '/' . $ini_array['thumbnail'];
									}

// Required attribute to identify the template.
									// and it is used as super-class-name for grouping styles to apply for the template.
									self::$_templates_list[ $prefix ] = $ini_array;
								}
							}
						}
					}
				}
			}

return self::$_templates_list;
		} // End load_templates.

/**
		 * Enqueues or sends to the browser the template's resources (CSS and JS files)
		 *
		 * Loads the templates if they have not been loaded previously.
		 * Checks if the resources of current template were enqueued previously to prevent to load the resources by duplicated.
		 * Checks if the resources should be enqueued, or sent to the browser directly.
		 *
		 * @param string $template template id.
		 * @return void.
		 */
		public static function enqueue_template_resources( $template ) {
			$template  = trim( $template );
			$templates = self::load_templates();

if ( in_array( $template, self::$_enqueued_list ) ) {
				return;
			}
			self::$_enqueued_list[] = $template; // The template's resources were enqueued.

if ( ! empty( $templates[ $template ] ) ) {
				$template_info = $templates[ $template ];

if ( ! empty( $template_info['file'] ) && ( $css = trim( $template_info['file'] ) ) != '' ) { // phpcs:ignore Squiz.PHP.DisallowMultipleAssignments
					if ( $GLOBALS['CP_CALCULATEDFIELDSF_DEFAULT_DEFER_SCRIPTS_LOADING'] ) {
						 wp_enqueue_style( 'cpcff_template_css' . $template, $css, array(), CP_CALCULATEDFIELDSF_VERSION );
					} else {
						$css .= ( strpos( $css, '?' ) === false ) ? '?' : '&';
						print '<link href="' . esc_attr( esc_url( $css ) ) . 'ver=' . esc_attr( CP_CALCULATEDFIELDSF_VERSION ) . '" type="text/css" rel="stylesheet" property="stylesheet" />'; // phpcs:ignore WordPress.WP.EnqueuedResources
					}
				}

if ( ! empty( $template_info['js'] ) && ( $js = trim( $template_info['js'] ) ) != '' ) { // phpcs:ignore Squiz.PHP.DisallowMultipleAssignments
					if ( $GLOBALS['CP_CALCULATEDFIELDSF_DEFAULT_DEFER_SCRIPTS_LOADING'] ) {
						 wp_enqueue_script( 'cpcff_template_js' . $template, $js, array(), CP_CALCULATEDFIELDSF_VERSION );
					} else {
						$js .= ( strpos( $js, '?' ) === false ) ? '?' : '&';
						print '<script data-category="functional" src="' . esc_attr( esc_url( $js ) ) . 'ver=' . esc_attr( CP_CALCULATEDFIELDSF_VERSION ) . '"></script>'; // phpcs:ignore WordPress.WP.EnqueuedResources
					}
				}
			}
		} // End enqueue_template_resources.
	} // End CPCFF_TEMPLATES.
}