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<?php
namespace Imagify\Webp\RewriteRules;
defined( 'ABSPATH' ) || die( 'Cheatin’ uh?' );
/**
* Display webp images on the site with rewrite rules.
*
* @since 1.9
* @author Grégory Viguier
*/
class Display {
use \Imagify\Traits\InstanceGetterTrait;
/**
* Option value.
*
* @var string
* @since 1.9
* @author Grégory Viguier
*/
const OPTION_VALUE = 'rewrite';
/**
* Init.
*
* @since 1.9
* @access public
* @author Grégory Viguier
*/
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' ] );
}
/** ----------------------------------------------------------------------------------------- */
/** HOOKS =================================================================================== */
/** ----------------------------------------------------------------------------------------- */
/**
* If display webp images via rewrite rules, add the rules to the .htaccess/etc file.
*
* @since 1.9
* @access public
* @author Grégory Viguier
*
* @param array $values The option values.
* @return array
*/
public function maybe_add_rewrite_rules( $values ) {
global $is_apache, $is_iis7, $is_nginx;
// Display webp?
$was_enabled = (bool) get_imagify_option( 'display_webp' );
// See \Imagify_Options->validate_values_on_update() for why we use 'convert_to_webp' here.
$is_enabled = ! empty( $values['display_webp'] ) && ! empty( $values['convert_to_webp'] );
// Which method?
$old_value = get_imagify_option( 'display_webp_method' );
$new_value = ! empty( $values['display_webp_method'] ) ? $values['display_webp_method'] : '';
// Decide when to add or remove rules.
$is_rewrite = self::OPTION_VALUE === $new_value;
$was_rewrite = self::OPTION_VALUE === $old_value;
$add_or_remove = false;
if ( $is_enabled && $is_rewrite && ( ! $was_enabled || ! $was_rewrite ) ) {
// Display webp & use rewrite method, but only if one of the values changed: add rules.
$add_or_remove = 'add';
} elseif ( $was_enabled && $was_rewrite && ( ! $is_enabled || ! $is_rewrite ) ) {
// Was displaying webp & was using rewrite method, but only if one of the values changed: remove rules.
$add_or_remove = 'remove';
} else {
return $values;
}
if ( $is_apache ) {
$rules = new Apache();
} elseif ( $is_iis7 ) {
$rules = new IIS();
} elseif ( $is_nginx ) {
$rules = new Nginx();
} else {
return $values;
}
if ( 'add' === $add_or_remove ) {
// Add the rewrite rules.
$result = $rules->add();
} else {
// Remove the rewrite rules.
$result = $rules->remove();
}
if ( ! is_wp_error( $result ) ) {
return $values;
}
// Display an error message.
if ( is_multisite() && strpos( wp_get_referer(), network_admin_url( '/' ) ) === 0 ) {
\Imagify_Notices::get_instance()->add_network_temporary_notice( $result->get_error_message() );
} else {
\Imagify_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
* @access public
* @author Grégory Viguier
*/
public function maybe_add_webp_info() {
global $is_nginx;
$conf = $this->get_server_conf();
if ( ! $conf ) {
return;
}
$writable = $conf->is_file_writable();
if ( is_wp_error( $writable ) ) {
$rules = $conf->get_new_contents();
if ( ! $rules ) {
// Uh?
return;
}
printf(
/* translators: %s is a file name. */
esc_html__( 'If you choose to use rewrite rules, you will have to add the following lines manually to the %s file:', 'imagify' ),
'<code>' . $this->get_file_path( true ) . '</code>'
);
echo '<pre class="code">' . esc_html( $rules ) . '</pre>';
} elseif ( $is_nginx ) {
printf(
/* translators: %s is a file name. */
esc_html__( 'If you choose to use rewrite rules, the file %s will be created and must be included into the server’s configuration file (then restart the server).', 'imagify' ),
'<code>' . $this->get_file_path( true ) . '</code>'
);
}
}
/**
* Add rules on plugin activation.
*
* @since 1.9
* @access public
* @author Grégory Viguier
*/
public function activate() {
$conf = $this->get_server_conf();
if ( ! $conf ) {
return;
}
if ( ! get_imagify_option( 'display_webp' ) ) {
return;
}
if ( self::OPTION_VALUE !== get_imagify_option( 'display_webp_method' ) ) {
return;
}
if ( is_wp_error( $conf->is_file_writable() ) ) {
return;
}
$conf->add();
}
/**
* Remove rules on plugin deactivation.
*
* @since 1.9
* @access public
* @author Grégory Viguier
*/
public function deactivate() {
$conf = $this->get_server_conf();
if ( ! $conf ) {
return;
}
if ( ! get_imagify_option( 'display_webp' ) ) {
return;
}
if ( self::OPTION_VALUE !== get_imagify_option( 'display_webp_method' ) ) {
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
* @access public
* @author Grégory Viguier
*
* @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 server conf instance.
*
* @since 1.9
* @access public
* @author Grégory Viguier
*
* @return \Imagify\WriteFile\WriteFileInterface
*/
protected function get_server_conf() {
global $is_apache, $is_iis7, $is_nginx;
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();
} elseif ( $is_nginx ) {
$this->server_conf = new Nginx();
} else {
$this->server_conf = false;
}
return $this->server_conf;
}
}
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