1 files changed, 115 insertions, 0 deletions
diff --git a/inc/core/class-astra-attr.php b/inc/core/class-astra-attr.php
new file mode 100644
index 0000000..2f55e46
--- /dev/null
+++ b/inc/core/class-astra-attr.php
@@ -0,0 +1,115 @@
+<?php
+/**
+ * Astra Attributes Class.
+ *
+ * @package     Astra
+ * @author      Astra
+ * @copyright   Copyright (c) 2020, Astra
+ * @link        https://wpastra.com/
+ * @since       Astra 1.6.2
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly.
+}
+
+if ( ! class_exists( 'Astra_Attr' ) ) :
+
+	/**
+	 * Class Astra_Attr
+	 */
+	class Astra_Attr {
+
+		/**
+		 * Store Instance on Current Class.
+		 *
+		 * @var object instance
+		 */
+		private static $instance;
+
+		/**
+		 * Initiator
+		 */
+		public static function get_instance() {
+			if ( ! isset( self::$instance ) ) {
+				self::$instance = new self();
+			}
+			return self::$instance;
+		}
+
+		/**
+		 * Initialuze the Class.
+		 *
+		 * @since 1.6.2
+		 */
+		private function __construct() {}
+
+		/**
+		 * Build list of attributes into a string and apply contextual filter on string.
+		 *
+		 * The contextual filter is of the form `astra_attr_{context}_output`.
+		 *
+		 * @since 1.6.2
+		 *
+		 * @param string $context    The context, to build filter name.
+		 * @param array  $attributes Optional. Extra attributes to merge with defaults.
+		 * @param array  $args       Optional. Custom data to pass to filter.
+		 * @return string String of HTML attributes and values.
+		 */
+		public function astra_attr( $context, $attributes = array(), $args = array() ) {
+
+			$attributes = $this->astra_parse_attr( $context, $attributes, $args );
+
+			$output = '';
+
+			// Cycle through attributes, build tag attribute string.
+			foreach ( $attributes as $key => $value ) {
+
+				if ( ! $value ) {
+					continue;
+				}
+
+				if ( true === $value ) {
+					$output .= esc_html( $key ) . ' ';
+				} else {
+					$output .= sprintf( '%s="%s" ', esc_html( $key ), esc_attr( $value ) );
+				}
+			}
+
+			$output = apply_filters( "astra_attr_{$context}_output", $output, $attributes, $context, $args );
+
+			return trim( $output );
+		}
+
+		/**
+		 * Merge array of attributes with defaults, and apply contextual filter on array.
+		 *
+		 * The contextual filter is of the form `astra_attr_{context}`.
+		 *
+		 * @since 1.6.2
+		 *
+		 * @param string $context    The context, to build filter name.
+		 * @param array  $attributes Optional. Extra attributes to merge with defaults.
+		 * @param array  $args       Optional. Custom data to pass to filter.
+		 * @return array Merged and filtered attributes.
+		 */
+		public function astra_parse_attr( $context, $attributes = array(), $args = array() ) {
+
+			$defaults = array(
+				'class' => sanitize_html_class( $context ),
+			);
+
+			$attributes = wp_parse_args( $attributes, $defaults );
+
+			// Contextual filter.
+			return apply_filters( "astra_attr_{$context}", $attributes, $context, $args );
+		}
+
+	}
+
+endif;
+
+/**
+ * Kicking this off by calling 'get_instance()' method
+ */
+Astra_Attr::get_instance();