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msd2/wordpress/wp-content/plugins/glue-for-yoast-seo-amp/classes/class-build-css.php

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+<?php
+/**
+ * @package     YoastSEO_AMP_Glue\CSS_Builder
+ * @author      Jip Moors
+ * @copyright   2016 Yoast BV
+ * @license     GPL-2.0+
+ */
+
+if ( ! class_exists( 'YoastSEO_AMP_CSS_Builder', false ) ) {
+
+	class YoastSEO_AMP_CSS_Builder {
+
+		/** @var array Option to CSS lookup map */
+		private $items = array();
+
+		/**
+		 * Add option to CSS map
+		 *
+		 * @param string $option_key Option key.
+		 * @param string $selector   CSS Selector.
+		 * @param string $property   CSS Property that will hold the value of the option.
+		 */
+		public function add_option( $option_key, $selector, $property ) {
+			$this->items[ $option_key ] = array( 'selector' => $selector, 'property' => $property );
+		}
+
+		/**
+		 * @return string Output CSS
+		 */
+		public function build() {
+			$options = YoastSEO_AMP_Options::get();
+
+			$output = "\n";
+			$css    = array();
+
+			$options = array_filter( $options );
+			$apply   = array_intersect_key( $this->items, $options );
+
+			if ( is_array( $apply ) ) {
+				foreach ( $apply as $key => $placement ) {
+
+					if ( ! isset( $css[ $placement['selector'] ] ) ) {
+						$css[ $placement['selector'] ] = array();
+					}
+
+					$css[ $placement['selector'] ][ $placement['property'] ] = $options[ $key ];
+				}
+			}
+
+			if ( ! empty( $css ) ) {
+				foreach ( $css as $selector => $properties ) {
+
+					$inner = '';
+					foreach ( $properties as $property => $value ) {
+						$inner .= sprintf( "%s: %s;\n", $property, $value );
+					}
+
+					$output .= sprintf( "%s {\n%s}\n", $selector, $inner );
+				}
+			}
+
+			return $output;
+		}
+	}
+}