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define('TD_SPEED_BOOSTER' , 'v4.1');

class td_speed_booster {

private $style_footer_queue = array(); // here we keep all the stylesheets IDs that we want to move to the footer

private $is_ie = false; // if the browser is detected as IE, treat it differently

// here we keep the theme information
private $td_theme_name = '';
private $td_theme_version = '';
private $td_deploy_mode = '';

private $allowed_plugins = array(
'bbpress/bbpress.php',
'contact-form-7/wp-contact-form-7.php',
'jetpack/jetpack.php',
'js_composer/js_composer.php',
'td-speed-booster/td-speed-booster.php',
'font-awesome-4-menus/n9m-font-awesome-4.php',
'wordpress-seo/wp-seo.php',
'wp-user-avatar/wp-user-avatar.php',
'td-social-counter/td-social-counter.php',
'wp-super-cache/wp-cache.php'
);

// this class is instantiated at the bottom of this page
function __construct() {

add_action('td_wp_booster_loaded', array($this, 'start_booster'));
}

/**
* everything starts from here
*/
function start_booster() {
// read the theme version and name if defined
if (defined('TD_THEME_VERSION') and defined('TD_THEME_NAME') and defined('TD_DEPLOY_MODE')) {
$this->td_theme_version = TD_THEME_VERSION;
$this->td_theme_name = TD_THEME_NAME;
$this->td_deploy_mode = TD_DEPLOY_MODE;
} else {
return;
}

// detect IE 8 9 10 11
if (
!empty($_SERVER['HTTP_USER_AGENT'])
and (preg_match('~MSIE|Internet Explorer~i', $_SERVER['HTTP_USER_AGENT']) or (strpos($_SERVER['HTTP_USER_AGENT'], 'Trident/7.0; rv:11.0') !== false))
) {
$this->is_ie = true;
}

// add hooks
add_action('wp_enqueue_scripts', array($this, 'css_mover'), 1002); // 1002 priority - because visual composer has 1000 and we use 1001 in the wp010 theme
add_action('wp_enqueue_scripts', array($this, 'js_mover'), 1002); // 1002 priority - because visual composer has 1000 and we use 1001 in the wp010 theme
add_action('wp_footer', array($this, 'render_footer_styles'), 15);

// hide the body only on IE and Newspaper 6+
if (
$this->is_ie === false
and $this->td_theme_name == 'Newsmag'
) {
//add_action('wp_head', array($this, 'hide_body_inline_css'), 15);
}

/**
* jetpack is 'special' - it has to be moved like this. It has now only one CSS
* the two hooks are needed!
* @since 27.05.2015
*/
add_action('wp_print_styles', array($this, 'jetpack_mover'), 10);
add_action('wp_print_footer_scripts', array($this, 'jetpack_mover'), 10);
}

/**
* jetpack is 'special' - it has to be moved like this. It has now only one CSS
* @since 27.05.2015
*/
function jetpack_mover() {
$this->move_style_to_footer_queue('jetpack_css');
}

/**
* here we move the css
*/
function css_mover() {
if ($this->td_theme_name == 'Newsmag') {
// wp 011 - Newspaper 6

//$this->move_style_to_footer_queue('bbp-default-bbpress'); //bpress old
//$this->move_style_to_footer_queue('bbp-default'); //bpress
$this->move_style_to_footer_queue('google_font_open_sans');
$this->move_style_to_footer_queue('google_font_roboto');
$this->move_style_to_footer_queue('contact-form-7');

if ($this->is_ie === false) {
// move style.css theme style
//$this->move_style_to_footer_queue('js_composer_front');
//$this->move_style_to_footer_queue('td-theme'); //this is the main style of the theme. It's only moved on Newspaper 6!
}
}

//@todo test on newsmag
$this->move_style_to_footer_queue('woocommerce_frontend_styles'); //old woocommerce?
$this->move_style_to_footer_queue('woocommerce-layout');
$this->move_style_to_footer_queue('woocommerce-smallscreen');
$this->move_style_to_footer_queue('woocommerce-general');
$this->move_style_to_footer_queue('bp-legacy-css');

$this->move_style_to_footer_queue('td-theme');

$this->move_style_to_footer_queue('font-awesome-four');

//move revolution slider css
$this->move_style_to_footer_queue('rs-plugin-settings');
$this->move_style_to_footer_queue('genericons'); //still rev slider
}

/**
* move the js
*/
function js_mover() {
global $wp_scripts;

//detect revmin - revolution slider and do not move jquery, the plugin outputs raw js in the page!
if( !is_admin() and !isset($wp_scripts->registered['revmin'])){
if (is_ssl()) {
$td_protocol = 'https';
} else {
$td_protocol = 'http';
}

wp_deregister_script('jquery');
wp_register_script('jquery', ($td_protocol . '://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js'), true, '1.11.1', true);
wp_enqueue_script('jquery');
}

/**
* move javascript to footer
*/
$this->move_js_to_footer('themepunchtools');
$this->move_js_to_footer('td-site-min');
$this->move_js_to_footer('revmin');
$this->move_js_to_footer('archivesCW');
$this->move_js_to_footer('js_composer_front');
$this->move_style_to_footer_queue('archives-cal-classiclight');

//print_r($wp_scripts);
// replace comment-reply.min.js with inline version
}

/**
* here we render the footer styles
* the styles are already deregistered when you call @see move_style_to_footer_queue ($style_id)
*/
function render_footer_styles() {
//get the theme version for style
$current_theme_version = $this->td_theme_version;

//on demo mode, auto generate version hourly + day - so we get a fresh css hourly
if ($this->td_deploy_mode == 'demo') {
$current_theme_version = date('jG');
}

if (isset($this->style_footer_queue['td-theme'])) {
// whatever the order, make damn sure that our td-theme style is LAST - we remove it from the queue and add it again at the end
$td_theme_value = $this->style_footer_queue['td-theme'];
unset($this->style_footer_queue['td-theme']);
$this->style_footer_queue['td-theme'] = $td_theme_value;
}

// output the new styles
foreach ($this->style_footer_queue as $style_id => $style_src) {
echo "<link rel='stylesheet' id='" . $style_id . "-css' href='" . $style_src . "?ver=" . $current_theme_version . "' type='text/css' media='all' />\n";
}
}

/**
* prevent flickering of the image until the style is loaded
*/
function hide_body_inline_css() {
echo '<style>body {visibility:hidden;}</style>';
}

/**
* the id of the style can be found in the source of the page, for example:
* <link rel='stylesheet' id='td-theme-css' => the id is 'td-theme' (note that the '-css' part is missing)
* using this method you can move other styles if needed
* Moves a style to the bottom of the page
* @param $style_id string - the id of the style
*/
function move_style_to_footer_queue($style_id) {
global $wp_styles;
if (!empty($wp_styles->registered[$style_id]) and !empty($wp_styles->registered[$style_id]->src)) {
$this->style_footer_queue[$style_id] = $wp_styles->registered[$style_id]->src;
wp_deregister_style($style_id);
}
}

/**
* @param $js_id string - the js file id (this is a bit more complex to get) @todo -> add a tutorial about how to get the theme js
*/
function move_js_to_footer($js_id) {
global $wp_scripts;
if (isset($wp_scripts->registered[$js_id])) {
wp_enqueue_script($js_id, ($wp_scripts->registered[$js_id]->src), '', $wp_scripts->registered[$js_id]->ver, true);
}

}

}