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

code from pantheon

* code from pantheon

wp/wp-content/plugins/imagify/classes/Webp/Display.php

@@ -0,0 +1,239 @@
+<?php
+namespace Imagify\Webp;
+
+use Imagify\Notices\Notices;
+use Imagify\Traits\InstanceGetterTrait;
+
+/**
+ * Display WebP images on the site.
+ *
+ * @since 1.9
+ */
+class Display {
+	use InstanceGetterTrait;
+
+	/**
+	 * Server conf object.
+	 *
+	 * @var    \Imagify\WriteFile\WriteFileInterface
+	 * @since 1.9
+	 */
+	protected $server_conf;
+
+	/**
+	 * Init.
+	 *
+	 * @since 1.9
+	 */
+	public function init() {
+		add_filter( 'imagify_settings_on_save',   [ $this, 'maybe_add_rewrite_rules' ] );
+		add_action( 'imagify_settings_webp_info', [ $this, 'maybe_add_webp_info' ] );
+		add_action( 'imagify_activation',         [ $this, 'activate' ] );
+		add_action( 'imagify_deactivation',       [ $this, 'deactivate' ] );
+
+		Picture\Display::get_instance()->init();
+		RewriteRules\Display::get_instance()->init();
+	}
+
+	/** ----------------------------------------------------------------------------------------- */
+	/** HOOKS =================================================================================== */
+	/** ----------------------------------------------------------------------------------------- */
+
+	/**
+	 * If display WebP images, add the WebP type to the .htaccess/etc file.
+	 *
+	 * @since 1.9
+	 *
+	 * @param  array $values The option values.
+	 * @return array
+	 */
+	public function maybe_add_rewrite_rules( $values ) {
+		$old_value = (bool) get_imagify_option( 'display_webp' );
+		// See \Imagify_Options->validate_values_on_update() for why we use 'convert_to_webp' here.
+		$new_value = ! empty( $values['display_webp'] ) && ! empty( $values['convert_to_webp'] );
+
+		if ( $old_value === $new_value ) {
+			// No changes.
+			return $values;
+		}
+
+		if ( ! $this->get_server_conf() ) {
+			return $values;
+		}
+
+		if ( $new_value ) {
+			// Add the WebP file type.
+			$result = $this->get_server_conf()->add();
+		} else {
+			// Remove the WebP file type.
+			$result = $this->get_server_conf()->remove();
+		}
+
+		if ( ! is_wp_error( $result ) ) {
+			return $values;
+		}
+
+		// Display an error message.
+		if ( is_multisite() && strpos( wp_get_referer(), network_admin_url( '/' ) ) === 0 ) {
+			Notices::get_instance()->add_network_temporary_notice( $result->get_error_message() );
+		} else {
+			Notices::get_instance()->add_site_temporary_notice( $result->get_error_message() );
+		}
+
+		return $values;
+	}
+
+	/**
+	 * If the conf file is not writable, add a warning.
+	 *
+	 * @since 1.9
+	 */
+	public function maybe_add_webp_info() {
+		$conf = $this->get_server_conf();
+
+		if ( ! $conf ) {
+			return;
+		}
+
+		$writable = $conf->is_file_writable();
+
+		if ( ! is_wp_error( $writable ) ) {
+			return;
+		}
+
+		$rules = $conf->get_new_contents();
+
+		if ( ! $rules ) {
+			// Uh?
+			return;
+		}
+
+		echo '<br/>';
+
+		printf(
+			/* translators: %s is a file name. */
+			esc_html__( 'Imagify does not seem to be able to edit or create a %s file, you will have to add the following lines manually to it:', 'imagify' ),
+			'<code>' . $this->get_file_path( true ) . '</code>'
+		);
+
+		echo '<pre class="code">' . esc_html( $rules ) . '</pre>';
+	}
+
+	/**
+	 * Add rules on plugin activation.
+	 *
+	 * @since 1.9
+	 */
+	public function activate() {
+		$conf = $this->get_server_conf();
+
+		if ( ! $conf ) {
+			return;
+		}
+		if ( ! get_imagify_option( 'display_webp' ) ) {
+			return;
+		}
+		if ( is_wp_error( $conf->is_file_writable() ) ) {
+			return;
+		}
+
+		$conf->add();
+	}
+
+	/**
+	 * Remove rules on plugin deactivation.
+	 *
+	 * @since 1.9
+	 */
+	public function deactivate() {
+		$conf = $this->get_server_conf();
+
+		if ( ! $conf ) {
+			return;
+		}
+		if ( ! get_imagify_option( 'display_webp' ) ) {
+			return;
+		}
+
+		$file_path  = $conf->get_file_path();
+		$filesystem = \Imagify_Filesystem::get_instance();
+
+		if ( ! $filesystem->exists( $file_path ) ) {
+			return;
+		}
+		if ( ! $filesystem->is_writable( $file_path ) ) {
+			return;
+		}
+
+		$conf->remove();
+	}
+
+	/** ----------------------------------------------------------------------------------------- */
+	/** TOOLS =================================================================================== */
+	/** ----------------------------------------------------------------------------------------- */
+
+	/**
+	 * Get the path to the directory conf file.
+	 *
+	 * @since 1.9
+	 *
+	 * @param  bool $relative True to get a path relative to the site’s root.
+	 * @return string|bool    The file path. False on failure.
+	 */
+	public function get_file_path( $relative = false ) {
+		if ( ! $this->get_server_conf() ) {
+			return false;
+		}
+
+		$file_path = $this->get_server_conf()->get_file_path();
+
+		if ( $relative ) {
+			return \Imagify_Filesystem::get_instance()->make_path_relative( $file_path );
+		}
+
+		return $file_path;
+	}
+
+	/**
+	 * Get the WebP display method by validating the given value.
+	 *
+	 * @since 1.9
+	 *
+	 * @param  array $values The option values.
+	 * @return string        'picture' or 'rewrite'.
+	 */
+	public function get_display_webp_method( $values ) {
+		$options = \Imagify_Options::get_instance();
+		$default = $options->get_default_values();
+		$default = $default['display_webp_method'];
+		$method  = ! empty( $values['display_webp_method'] ) ? $values['display_webp_method'] : '';
+
+		return $options->sanitize_and_validate( 'display_webp_method', $method, $default );
+	}
+
+	/**
+	 * Get the server conf instance.
+	 * Note: nothing needed for nginx.
+	 *
+	 * @since 1.9
+	 *
+	 * @return \Imagify\WriteFile\WriteFileInterface
+	 */
+	protected function get_server_conf() {
+		global $is_apache, $is_iis7;
+
+		if ( isset( $this->server_conf ) ) {
+			return $this->server_conf;
+		}
+
+		if ( $is_apache ) {
+			$this->server_conf = new Apache();
+		} elseif ( $is_iis7 ) {
+			$this->server_conf = new IIS();
+		} else {
+			$this->server_conf = false;
+		}
+
+		return $this->server_conf;
+	}
+}