<?php

if ( ! defined( 'ABSPATH' ) ) exit; // No direct access


class Aabcore_cache_on_cache{

    
    public function __construct() {


   }

   Public function Aabcore_cache_ona_cache(){
   

$json_cache_caching = '[
{"cache_cdn":"0", "t_cache_cdn":"1", "t_cache_cache":" Second caching time"},
{"cache_cdn":"450", "t_cache_cdn":"1", "t_cache_cache":" Second caching time"},
{"cache_cdn":"900", "t_cache_cdn":"2", "t_cache_cache":" Second caching time"},
{"cache_cdn":"1800","t_cache_cdn":"3", "t_cache_cache":" Second caching time"},
{"cache_cdn":"3600","t_cache_cdn":"4", "t_cache_cache":" Second caching time"},
{"cache_cdn":"4600","t_cache_cdn":"5", "t_cache_cache":" Second caching time"},
{"cache_cdn":"5600","t_cache_cdn":"6", "t_cache_cache":" Second caching time"}
]';
    return $json_cache_caching;


}
public function aabcore_min_cache_html_cache( $html ) {

        // Remove HTML comments (except IE or conditionals)
        $html = preg_replace('/<!--(?!\[if).*?-->/', '', $html);

        // Remove whitespace between tags
        $html = preg_replace('/>\s+</', '><', $html);

        // Collapse multiple spaces
        $html = preg_replace('/\s{2,}/', ' ', $html);

        // Trim spaces around HTML
        return trim($html);
    }


Public function aabcore_cache_he_cache( $file, $Maxage, $filemtime ){
   

        $mtime  = $filemtime;        // last modified timestamp
        $size   = filesize($file);         // file size
        $mime   = mime_content_type($file); // optional content-type

        // --- Derived values ---
        $lastModified = gmdate("D, d M Y H:i:s", $mtime) . " GMT";
        $expires      = gmdate("D, d M Y H:i:s", time() + $Maxage) . " GMT";

        // Strong ETag: based on file modification time + size
        $etag = '"' . md5($mtime . $size) . '"';

        // --- Send headers ---
        header("Content-Type: ".$mime);
        header("Last-Modified: ".$lastModified);
        header("ETag: ".$etag);
        header("Expires: ".$expires);
        //header("Cache-Control: public, max-age= ".$Maxage);

        $n_cache_am_cache = get_option( 'aabc_cache_a_cache');
        $n_cache_an_cache = get_option( 'aabc_cache_b_cache');
        $n_cache_ao_cache = get_option( 'aabc_cache_c_cache');
        $n_cache_ap_cache = get_option( 'aabc_cache_d_cache');

        header("Cache-Control:".$n_cache_am_cache.' '.$n_cache_an_cache.' '.$n_cache_ao_cache.' '.$n_cache_ap_cache);
        // --- Handle conditional request (returns 304 if unchanged) ---
        $clientEtag = sanitize_text_field( wp_unslash( $_SERVER['HTTP_IF_NONE_MATCH'] ?? null));
        $clientLastModified =sanitize_text_field( wp_unslash( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ?? null));

        if (
            ($clientEtag && trim($clientEtag) === $etag) ||
            ($clientLastModified && $clientLastModified === $lastModified)
        ) {
            header("HTTP/1.1 304 Not Modified");
            exit;
        }
        
       
}


}new Aabcore_cache_on_cache();