Merged in feature/from-pantheon (pull request #16)

code from pantheon

* code from pantheon

wp/wp-content/plugins/imagify/inc/3rd-party/wp-rocket/classes/Main.php

@@ -0,0 +1,87 @@
+<?php
+namespace Imagify\ThirdParty\WPRocket;
+
+use Imagify\Traits\InstanceGetterTrait;
+
+/**
+ * Compat class for WP Rocket plugin.
+ *
+ * @since 1.9.3
+ */
+class Main {
+	use InstanceGetterTrait;
+
+	/**
+	 * Launch the hooks.
+	 *
+	 * @since 1.9.3
+	 */
+	public function init() {
+		add_filter( 'imagify_cdn_source', [ $this, 'set_cdn_source' ] );
+	}
+
+
+	/** ----------------------------------------------------------------------------------------- */
+	/** HOOKS =================================================================================== */
+	/** ----------------------------------------------------------------------------------------- */
+
+	/**
+	 * Provide a custom CDN source.
+	 *
+	 * @since 1.9.3
+	 *
+	 * @param  array $source {
+	 *     An array of arguments.
+	 *
+	 *     @type $name string The name of which provides the URL (plugin name, etc).
+	 *     @type $url  string The CDN URL.
+	 * }
+	 * @return array
+	 */
+	public function set_cdn_source( $source ) {
+		if ( ! function_exists( 'get_rocket_option' ) ) {
+			return $source;
+		}
+
+		if ( ! get_rocket_option( 'cdn' ) ) {
+			return $source;
+		}
+
+		$container = apply_filters( 'rocket_container', null );
+
+		if ( is_object( $container ) && method_exists( $container, 'get' ) ) {
+			$cdn = $container->get( 'cdn' );
+
+			if ( $cdn && method_exists( $cdn, 'get_cdn_urls' ) ) {
+				$url = $cdn->get_cdn_urls( [ 'all', 'images' ] );
+			}
+		}
+
+		if ( ! isset( $url ) && function_exists( 'get_rocket_cdn_cnames' ) ) {
+			$url = get_rocket_cdn_cnames( [ 'all', 'images' ] );
+		}
+
+		if ( empty( $url ) ) {
+			return $source;
+		}
+
+		$url = reset( $url );
+
+		if ( ! $url ) {
+			return $source;
+		}
+
+		if ( ! preg_match( '@^(https?:)?//@i', $url ) ) {
+			$url = '//' . $url;
+		}
+
+		$scheme = wp_parse_url( \Imagify_Filesystem::get_instance()->get_site_root_url() );
+		$scheme = ! empty( $scheme['scheme'] ) ? $scheme['scheme'] : null;
+		$url    = set_url_scheme( $url, $scheme );
+
+		$source['name'] = 'WP Rocket';
+		$source['url']  = $url;
+
+		return $source;
+	}
+}