<?php

include_once __DIR__ . "/Google.php";

class GoogleDrive extends Google {

    public function __construct() {
        parent::__construct();
        $this->scope = "https://www.googleapis.com/auth/drive";
    }

    public function downloadFile($file_id, $dir, $filename) {
        $url = 'https://www.googleapis.com/drive/v2/files/'.$file_id.'?key='.$this->api_key . '&alt=media';

        $download_request = curl_init($url);
        curl_setopt($download_request, CURLOPT_HTTPHEADER, $this->requestHeaders());
        curl_setopt($download_request, CURLOPT_RETURNTRANSFER, true);
        $response = curl_exec($download_request);
        mkdir($dir, 0755, true);
        $handle = fopen($dir.$filename, 'w+');
        $foo = fwrite($handle, $response); //fwrite to handle bytes stream
        fclose($handle);
        return $foo;
    }

    public function fileData($file_id) {
        $url = 'https://www.googleapis.com/drive/v2/files/'.$file_id.'?key='.$this->api_key;

        $download_request = curl_init($url);
        curl_setopt($download_request, CURLOPT_HTTPHEADER, $this->requestHeaders());
        curl_setopt($download_request, CURLOPT_RETURNTRANSFER, true);
        $response = curl_exec($download_request);
        return json_decode($response);
    }

    public function listFiles() {
        $url = 'https://www.googleapis.com/drive/v3/files';

        $url = $url . '?pageSize=1000';

        $request = curl_init($url);

        curl_setopt($request, CURLOPT_HTTPHEADER, $this->requestHeaders());
        curl_setopt($request, CURLOPT_RETURNTRANSFER, true);
        $response = curl_exec($request);
        return json_decode($response);
    }

    public function filesByFolder($folder_id) {
        $url = 'https://www.googleapis.com/drive/v2/files'
        .'/'. $folder_id.'/children'
        .'?pageSize=1000'
        .'&q='.urlencode("mimeType = 'application/pdf'");

        $request = curl_init($url);

        curl_setopt($request, CURLOPT_HTTPHEADER, $this->requestHeaders());
        curl_setopt($request, CURLOPT_RETURNTRANSFER, true);
        $response = curl_exec($request);
        return json_decode($response);
    }
}