set_converter_status();
$this->set_server_info_instance();
$this->set_rewrite_status();
$this->set_webp_serve_method();
}
/**
* Returns singleton instance
*
* @return WP_Optimize_WebP
*/
public static function get_instance() {
static $instance = null;
if (null === $instance) {
$instance = new WP_Optimize_WebP();
}
return $instance;
}
/**
* Test Run and find converter status
*/
public function set_converter_status() {
include_once WPO_PLUGIN_MAIN_PATH . 'webp/class-wpo-webp-test-run.php';
$converters = WP_Optimize()->get_options()->get_option('webp_converters', false);
if (empty($converters)) {
$converter_status = WPO_WebP_Test_Run::get_converter_status();
WP_Optimize()->get_options()->update_option('webp_converters', $converter_status['working_converters']);
}
}
/**
* Sets server info instance variable
*/
private function set_server_info_instance() {
if (!class_exists('WPO_Server_Info')) {
require_once(WPO_PLUGIN_MAIN_PATH . 'webp/class-wpo-server-info.php');
}
$this->_server_info_instance = WPO_Server_Info::get_instance();
}
/**
* Sets server's rewrite status
*/
private function set_rewrite_status() {
$this->_rewrite_status = $this->_server_info_instance->get_rewrite_status();
}
/**
* Sets how webp images are served
*/
private function set_webp_serve_method() {
if (true === $this->_rewrite_status) {
$this->use_htaccess();
} else {
$this->use_alter_html();
}
}
/**
* Setup .htaccess method
*/
private function use_htaccess() {
$options = Updraft_Smush_Manager()->get_smush_options();
$webp_conversion_enabled = isset($options['webp_conversion']) ? $options['webp_conversion'] : false;
$this->save_htaccess_rules($webp_conversion_enabled);
}
/**
* Setup alter html method
*/
private function use_alter_html() {
// To be continued in another part
// add_action('template_direct', array(''));
}
/**
* Save .htaccess rules
*
* @return bool
*/
public function save_htaccess_rules($webp_conversion_enabled = false) {
$wp_uploads = wp_get_upload_dir();
$htaccess_file = $wp_uploads['basedir'] . '/.htaccess';
if (!file_exists($htaccess_file)) {
file_put_contents($htaccess_file, '');
}
$htaccess_comment_section = 'WP-Optimize WebP Rules';
$this->_htaccess = new WP_Optimize_Htaccess($htaccess_file);
if ($this->_htaccess->is_exists() && !$webp_conversion_enabled) {
$this->_htaccess->remove_commented_section($htaccess_comment_section);
$this->_htaccess->write_file();
return true;
}
if ($this->_htaccess->is_commented_section_exists($htaccess_comment_section)) return false;
$this->_htaccess->update_commented_section($this->prepare_webp_htaccess_rules(), $htaccess_comment_section);
$this->_htaccess->write_file();
return true;
}
/**
* Prepare array of htaccess rules to use webp images.
*
* @return array
*/
private function prepare_webp_htaccess_rules() {
return array(
array(
'',
'RewriteEngine On',
'',
'# Redirect to existing converted image in same dir (if browser supports webp)',
'RewriteCond %{HTTP_ACCEPT} image/webp',
'RewriteCond %{REQUEST_FILENAME} (?i)(.*)(\.jpe?g|\.png)$',
'RewriteCond %1%2\.webp -f',
'RewriteRule (?i)(.*)(\.jpe?g|\.png)$ %1%2\.webp [T=image/webp,E=EXISTING:1,E=ADDVARY:1,L]',
'',
'# Make sure that browsers which does not support webp also gets the Vary:Accept header',
'# when requesting images that would be redirected to webp on browsers that does.',
array(
'',
array(
'',
'Header append "Vary" "Accept"',
'',
),
'',
),
'',
'',
'',
),
array(
'# Rules for handling requests for webp images',
'# ---------------------------------------------',
'',
'# Set Vary:Accept header if we came here by way of our redirect, which set the ADDVARY environment variable',
'# The purpose is to make proxies and CDNs aware that the response varies with the Accept header',
'',
array(
'',
'# Apache appends "REDIRECT_" in front of the environment variables defined in mod_rewrite, but LiteSpeed does not',
'# So, the next lines are for Apache, in order to set environment variables without "REDIRECT_"',
'SetEnvIf REDIRECT_EXISTING 1 EXISTING=1',
'SetEnvIf REDIRECT_ADDVARY 1 ADDVARY=1',
'',
'Header append "Vary" "Accept" env=ADDVARY',
'',
'# Set X-WPO-WebP header for diagnose purposes',
'Header set "X-WPO-WebP" "Redirected directly to existing webp" env=EXISTING',
'',
),
'',
),
array(
'# Register webp mime type',
'',
'AddType image/webp .webp',
'',
),
);
}
}
endif;