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<?php

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namespace AMPforWP\AMPVendor;

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if ( ! defined( 'ABSPATH' ) ) {

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exit;

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}

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class AMPFORWP_Tree_Shaking_Transient{

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public static function ampforwp_get_proper_transient_name($transient){

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global $post;

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if(ampforwp_is_home()){

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$transient = "home";

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}elseif(ampforwp_is_blog()){

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$transient = "blog";

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}elseif(ampforwp_is_front_page()){

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$transient = "post-".ampforwp_get_frontpage_id();

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}elseif(!empty($post) && is_object($post) && is_singular()){

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$transient = "post-".intval($post->ID);

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}elseif(is_archive()){

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$page_id = get_queried_object_id();

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$transient = "archive-".intval($page_id);

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}

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if( is_user_logged_in() ){

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$transient = $transient.'-admin';

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}

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return $transient;

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}

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public static function ampforwp_set_file_transient( $transient, $value, $expiration = 0 ) {

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$transient = self::ampforwp_get_proper_transient_name($transient);

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$expiration = (int) $expiration;

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$value = apply_filters( "pre_set_transient_{$transient}", $value, $expiration, $transient );

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$expiration = apply_filters( "expiration_of_transient_{$transient}", $expiration, $value, $transient );

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if ( wp_using_ext_object_cache() ) {

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$result = wp_cache_set( $transient, $value, 'transient', $expiration );

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} else {

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$transient_timeout = '_transient_timeout_' . $transient;

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$transient_option = '_transient_' . $transient;

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/***

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Creating a file

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**/

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if($value){

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$upload_dir = wp_upload_dir();

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$user_dirname = $upload_dir['basedir'] . '/' . 'ampforwp-tree-shaking';

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if(!file_exists($user_dirname)) wp_mkdir_p($user_dirname);

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$content = $value;

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$new_file = $user_dirname."/".$transient_option.".css";

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$ifp = @fopen( $new_file, 'w+' );

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if ( ! $ifp ) {

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return ( array( 'error' => sprintf( __( 'Could not write file %s' ), $new_file ) ));

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}

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$result = @fwrite( $ifp, wp_json_encode($value) );

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fclose( $ifp );

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}

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}

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return $result;

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}

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public static function ampforwp_get_file_transient( $transient ) {

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$transient = self::ampforwp_get_proper_transient_name($transient);

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//$value = '';

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$pre = apply_filters( "pre_transient_{$transient}", false, $transient );

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if ( false !== $pre )

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return $pre;

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if ( wp_using_ext_object_cache() ) {

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$value = wp_cache_get( $transient, 'transient' );

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} else {

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$transient_option = '_transient_' . $transient;

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/*if ( ! wp_installing() ) {

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// If option is not in alloptions, it is not autoloaded and thus has a timeout

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$alloptions = wp_load_alloptions();

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if ( !isset( $alloptions[$transient_option] ) ) {

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$transient_timeout = '_transient_timeout_' . $transient;

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$timeout = get_option( $transient_timeout );

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if ( false !== $timeout && $timeout < time() ) {

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delete_option( $transient_option );

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delete_option( $transient_timeout );

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$value = false;

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}

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}

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}*/

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if ( ! isset( $value ) ){

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$upload_dir = wp_upload_dir();

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$user_dirname = $upload_dir['basedir'] . '/' . 'ampforwp-tree-shaking';

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if(!file_exists($user_dirname)) wp_mkdir_p($user_dirname);

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$new_file = $user_dirname."/".$transient_option.".css";

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if(file_exists($user_dirname)){

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$files = glob($user_dirname . '/*');

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//Loop through the file list.

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foreach($files as $file){

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$file_time = filectime($file);

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$file_date = date("Y-m-d",$file_time);

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$datetime1 = date_create($file_date);

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$get_current_date = date('Y-m-d');

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$datetime2 = date_create($get_current_date);

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$interval = date_diff($datetime1, $datetime2);

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$day_diff = $interval->format('%a');

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if($day_diff >= '30' ){

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//Make sure that this is a file and not a directory.

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if(is_file($file) && strpos($file, '_transient')!==false ){

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//Use the unlink function to delete the file.

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unlink($file);

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}

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}

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}

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}

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if(file_exists($new_file) && filesize($new_file)>0){

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$ifp = @fopen( $new_file, 'r' );

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$value = fread($ifp, filesize($new_file));

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fclose($ifp);

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}

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//$value = get_option( $transient_option );

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}

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}

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$value = isset($value) ? $value : '';

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return apply_filters( "transient_{$transient}", json_decode($value, true), $transient );

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}

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}

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