<?php
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

class WPBotGCDownload
{
    private $download_url = 'https://github.com/qcloud/gc/raw/master/wpbotgc.zip';
    private $filename = 'wpbotgc.zip';
    public function __construct(){
        add_action('wp_ajax_qcld_wp_chatbot_gc_client_download', array($this, 'downloadgc'));
        add_action('wp_ajax_nopriv_qcld_wp_chatbot_gc_client_download', array($this, 'downloadgc'));
        add_action('wp_ajax_qcld_wp_chatbot_gc_client_extract', array($this, 'extractgc'));
        add_action('wp_ajax_nopriv_qcld_wp_chatbot_gc_client_extract', array($this, 'extractgc'));
        
    }

    public function create_folder($gcdirectory){
        return @mkdir( $gcdirectory, 0777, true );
    }

    public function create_file($filename){
        if ( ! @file_exists( $filename ) ) {
			if ( ! @is_writable( dirname( $filename ) ) ) {
				return false;
			}

			if ( ! @touch( $filename ) ) {
				return false;
			}
		} elseif ( ! @is_writable( $filename ) ) {
			return false;
		}

		$is_written = false;
		if ( ( $handle = @fopen( $filename, 'w' ) ) !== false ) {
			if ( @fwrite( $handle, '<?php //silence is golden' ) !== false ) {
				$is_written = true;
			}

			@fclose( $handle );
		}

		return $is_written;
    }

    public function downloadgc(){
        $nonce =  sanitize_text_field($_POST['nonce']);
        if (! wp_verify_nonce($nonce,'wp_chatbot')) {
            wp_send_json(array('success' => false, 'msg' => esc_html__('Failed in Security check', 'sm')));
            wp_die();

        }else{
            $gcdirectory = QCLD_wpCHATBOT_GC_DIRNAME;

            if ( ! is_dir( $gcdirectory ) ) {
                $this->create_folder( $gcdirectory );
            }
            if(!file_exists($gcdirectory.'/index.php')){
                $this->create_file( $gcdirectory.'/index.php' );
            }

            if(is_dir($gcdirectory)){

                $zipFile = $gcdirectory."/".$this->filename; // Local Zip File Path
                $zipResource = fopen($zipFile, "w");
                // Get The Zip File From Server
                $ch = curl_init();
                curl_setopt($ch, CURLOPT_URL, $this->download_url);
                curl_setopt($ch, CURLOPT_FAILONERROR, true);
                curl_setopt($ch, CURLOPT_HEADER, 0);
                curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
                curl_setopt($ch, CURLOPT_AUTOREFERER, true);
                curl_setopt($ch, CURLOPT_BINARYTRANSFER,true);
                curl_setopt($ch, CURLOPT_TIMEOUT, 10);
                curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); 
                curl_setopt($ch, CURLOPT_FILE, $zipResource);
                $page = curl_exec($ch);
                if(!$page) {
                    $response = array('status'=>'error','content'=> curl_error($ch));
                    //Sanitization to be checked
                    wp_send_json($response);
                }
                curl_close($ch);
                $response = array('status'=>'success','content'=> 'File downloaded successfully');
            }else{
                $response = array('status'=>'error','content'=> 'Server does not allow to create files and folders');
            }
            //Sanitization to be checked
            wp_send_json($response);
        }
    }

    function extractgc(){
        $nonce =  sanitize_text_field($_POST['nonce']);
        if (! wp_verify_nonce($nonce,'wp_chatbot')) {
            wp_send_json(array('success' => false, 'msg' => esc_html__('Failed in Security check', 'sm')));

        }else{
            $gcdirectory = QCLD_wpCHATBOT_GC_DIRNAME;
            $gcfilename = QCLD_wpCHATBOT_GC_DIRNAME.'/'.$this->filename;
            /* Open the Zip file */
            $zip = new ZipArchive;
            $extractPath = "path_to_extract";
            if($zip->open($gcfilename) != "true"){
                $response = array('status'=>'error','content'=> 'File Not Found!');
                //Sanitization to be checked
                wp_send_json($response);
            } 
            /* Extract Zip File */
            $zip->extractTo($gcdirectory);
            $zip->close();
            @unlink($gcfilename);
            $response = array('status'=>'success','content'=> 'Files Extracted successfully!');
            //Sanitization to be checked
            wp_send_json($response);
        }
    }
}

new WPBotGCDownload();