<?php
/*
 * Copyright (C) 2014-2015  Frederic France      <frederic.france@free.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * or see http://www.gnu.org/
 */

/**
 *      \file       htdocs/core/modules/printing/printgcp.modules.php
 *      \ingroup    printing
 *      \brief      File to provide printing with Google Cloud Print
 */

include_once DOL_DOCUMENT_ROOT.'/core/modules/printing/modules_printing.php';
require_once DOL_DOCUMENT_ROOT.'/includes/OAuth/bootstrap.php';
use OAuth\Common\Storage\DoliStorage;
use OAuth\Common\Consumer\Credentials;
use OAuth\OAuth2\Service\Google;

/**
 *     Class to provide printing with Google Cloud Print
 */
class printing_printgcp extends PrintingDriver
{
    var $name = 'printgcp';
    var $desc = 'PrintGCPDesc';
    var $picto = 'printer';
    var $active = 'PRINTING_PRINTGCP';
    var $conf = array();
    var $google_id = '';
    var $google_secret = '';
    var $error;
    var $errors = array();
    var $db;

    const LOGIN_URL = 'https://accounts.google.com/o/oauth2/token';
    const PRINTERS_SEARCH_URL = 'https://www.google.com/cloudprint/search';
    const PRINTERS_GET_JOBS = 'https://www.google.com/cloudprint/jobs';
    const PRINT_URL = 'https://www.google.com/cloudprint/submit';

    /**
     *  Constructor
     *
     *  @param      DoliDB      $db      Database handler
     */
    function __construct($db)
    {
        global $conf, $langs, $dolibarr_main_url_root;

        // Define $urlwithroot
        $urlwithouturlroot=preg_replace('/'.preg_quote(DOL_URL_ROOT,'/').'$/i','',trim($dolibarr_main_url_root));
        $urlwithroot=$urlwithouturlroot.DOL_URL_ROOT;		// This is to use external domain name found into config file
        //$urlwithroot=DOL_MAIN_URL_ROOT;					// This is to use same domain name than current
        $this->db = $db;
        
        if (!$conf->oauth->enabled) {
            $this->conf[] = array('varname'=>'PRINTGCP_INFO', 'info'=>$langs->transnoentitiesnoconv("WarningModuleNotActive", "OAuth"), 'type'=>'info');
        } else {
         
        	$this->google_id = $conf->global->OAUTH_GOOGLE_ID;
        	$this->google_secret = $conf->global->OAUTH_GOOGLE_SECRET;
        	// Token storage
        	$storage = new DoliStorage($this->db, $this->conf);
        	//$storage->clearToken('Google');
        	// Setup the credentials for the requests
        	$credentials = new Credentials(
            	$this->google_id,
            	$this->google_secret,
            	$urlwithroot.'/core/modules/oauth/google_oauthcallback.php'
        	);
        	$access = ($storage->hasAccessToken('Google')?'HasAccessToken':'NoAccessToken');
        	$serviceFactory = new \OAuth\ServiceFactory();
        	$apiService = $serviceFactory->createService('Google', $credentials, $storage, array());
        	$token_ok=true;
        	try {
            	$token = $storage->retrieveAccessToken('Google');
        	} catch (Exception $e) {
            	$this->errors[] = $e->getMessage();
            	$token_ok = false;
        	}
        	//var_dump($this->errors);exit;
        
        	$expire = false;
        	// Is token expired or will token expire in the next 30 seconds
        	if ($token_ok) {
            	$expire = ($token->getEndOfLife() !== -9002 && $token->getEndOfLife() !== -9001 && time() > ($token->getEndOfLife() - 30));
        	}

        	// Token expired so we refresh it
        	if ($token_ok && $expire) {
            	try {
                	// il faut sauvegarder le refresh token car google ne le donne qu'une seule fois
                	$refreshtoken = $token->getRefreshToken();
                	$token = $apiService->refreshAccessToken($token);
                	$token->setRefreshToken($refreshtoken);
                	$storage->storeAccessToken('Google', $token);
            	} catch (Exception $e) {
                	$this->errors[] = $e->getMessage();
            	}
        	}
            if ($this->google_id != '' && $this->google_secret != '') {
                $this->conf[] = array('varname'=>'PRINTGCP_INFO', 'info'=>'GoogleAuthConfigured', 'type'=>'info');
                $this->conf[] = array('varname'=>'PRINTGCP_TOKEN_ACCESS', 'info'=>$access, 'type'=>'info', 'renew'=>$urlwithroot.'/core/modules/oauth/google_oauthcallback.php?state=userinfo_email,userinfo_profile,cloud_print&backtourl='.urlencode(DOL_URL_ROOT.'/printing/admin/printing.php?mode=setup&driver=printgcp'), 'delete'=>($storage->hasAccessToken('Google')?$urlwithroot.'/core/modules/oauth/google_oauthcallback.php?action=delete&backtourl='.urlencode(DOL_URL_ROOT.'/printing/admin/printing.php?mode=setup&driver=printgcp'):''));
                if ($token_ok) {
                    $refreshtoken = $token->getRefreshToken();
                    $this->conf[] = array('varname'=>'PRINTGCP_TOKEN_REFRESH',   'info'=>((! empty($refreshtoken))?'Yes':'No'), 'type'=>'info');
                    $this->conf[] = array('varname'=>'PRINTGCP_TOKEN_EXPIRED',   'info'=>($expire?'Yes':'No'), 'type'=>'info');
                    $this->conf[] = array('varname'=>'PRINTGCP_TOKEN_EXPIRE_AT', 'info'=>(dol_print_date($token->getEndOfLife(), "dayhour")), 'type'=>'info');
                }
                /*
                if ($storage->hasAccessToken('Google')) {
                    $this->conf[] = array('varname'=>'PRINTGCP_AUTHLINK', 'link'=>$urlwithroot.'/core/modules/oauth/google_oauthcallback.php?backtourl='.urlencode(DOL_URL_ROOT.'/printing/admin/printing.php?mode=setup&driver=printgcp'), 'type'=>'authlink');
                    $this->conf[] = array('varname'=>'PRINTGCP_DELETE_TOKEN', 'link'=>$urlwithroot.'/core/modules/oauth/google_oauthcallback.php?action=delete&backtourl='.urlencode(DOL_URL_ROOT.'/printing/admin/printing.php?mode=setup&driver=printgcp'), 'type'=>'delete');
                } else {
                    $this->conf[] = array('varname'=>'PRINTGCP_AUTHLINK', 'link'=>$urlwithroot.'/core/modules/oauth/google_oauthcallback.php?backtourl='.urlencode(DOL_URL_ROOT.'/printing/admin/printing.php?mode=setup&driver=printgcp'), 'type'=>'authlink');
                }*/
            } else {
                $this->conf[] = array('varname'=>'PRINTGCP_INFO', 'info'=>'GoogleAuthNotConfigured', 'type'=>'info');
            }
        }
        // do not display submit button
        $this->conf[] = array('enabled'=>0, 'type'=>'submit');
    }

    /**
     *  Return list of available printers
     *
     *  @return  int                     0 if OK, >0 if KO
     */
    function listAvailablePrinters()
    {
        global $bc, $conf, $langs;
        $error = 0;
        $langs->load('printing');
        $var=true;

        $html = '<tr class="liste_titre">';
        $html.= '<td>'.$langs->trans('GCP_Name').'</td>';
        $html.= '<td>'.$langs->trans('GCP_displayName').'</td>';
        $html.= '<td>'.$langs->trans('GCP_Id').'</td>';
        $html.= '<td>'.$langs->trans('GCP_OwnerName').'</td>';
        $html.= '<td>'.$langs->trans('GCP_State').'</td>';
        $html.= '<td>'.$langs->trans('GCP_connectionStatus').'</td>';
        $html.= '<td>'.$langs->trans('GCP_Type').'</td>';
        $html.= '<td align="center">'.$langs->trans("Select").'</td>';
        $html.= '</tr>'."\n";
        $list = $this->getlist_available_printers();
        //$html.= '<td><pre>'.print_r($list,true).'</pre></td>';
        $var = true;
        foreach ($list['available'] as $printer_det)
        {
            $var = !$var;
            $html.= "<tr ".$bc[$var].">";
            $html.= '<td>'.$printer_det['name'].'</td>';
            $html.= '<td>'.$printer_det['displayName'].'</td>';
            $html.= '<td>'.$printer_det['id'].'</td>';  // id to identify printer to use
            $html.= '<td>'.$printer_det['ownerName'].'</td>';
            $html.= '<td>'.$printer_det['status'].'</td>';
            $html.= '<td>'.$langs->trans('STATE_'.$printer_det['connectionStatus']).'</td>';
            $html.= '<td>'.$langs->trans('TYPE_'.$printer_det['type']).'</td>';
            // Defaut
            $html.= '<td align="center">';
            if ($conf->global->PRINTING_GCP_DEFAULT == $printer_det['id'])
            {
                $html.= img_picto($langs->trans("Default"),'on');
            }
            else
                $html.= '<a href="'.$_SERVER["PHP_SELF"].'?action=setvalue&amp;mode=test&amp;varname=PRINTING_GCP_DEFAULT&amp;driver=printgcp&amp;value='.urlencode($printer_det['id']).'" alt="'.$langs->trans("Default").'">'.img_picto($langs->trans("Disabled"),'off').'</a>';
            $html.= '</td>';
            $html.= '</tr>'."\n";
        }
        $this->resprint = $html;
        return $error;
    }


    /**
     *  Return list of available printers
     *
     *  @return array      list of printers
     */
    function getlist_available_printers()
    {
        // Token storage
        $storage = new DoliStorage($this->db, $this->conf);
        // Setup the credentials for the requests
        $credentials = new Credentials(
            $this->google_id,
            $this->google_secret,
            DOL_MAIN_URL_ROOT.'/core/modules/oauth/google_oauthcallback.php'
        );
        $serviceFactory = new \OAuth\ServiceFactory();
        $apiService = $serviceFactory->createService('Google', $credentials, $storage, array());
        // Check if we have auth token
        $token_ok=true;
        try {
            $token = $storage->retrieveAccessToken('Google');
        } catch (Exception $e) {
            $this->errors[] = $e->getMessage();
            $token_ok = false;
        }
        $expire = false;
        // Is token expired or will token expire in the next 30 seconds
        if ($token_ok) {
            $expire = ($token->getEndOfLife() !== -9002 && $token->getEndOfLife() !== -9001 && time() > ($token->getEndOfLife() - 30));
        }

        // Token expired so we refresh it
        if ($token_ok && $expire) {
            try {
                // il faut sauvegarder le refresh token car google ne le donne qu'une seule fois
                $refreshtoken = $token->getRefreshToken();
                $token = $apiService->refreshAccessToken($token);
                $token->setRefreshToken($refreshtoken);
                $storage->storeAccessToken('Google', $token);
            } catch (Exception $e) {
                $this->errors[] = $e->getMessage();
            }
        }
        // Send a request with api
        try {
            $response = $apiService->request(self::PRINTERS_SEARCH_URL);
        } catch (Exception $e) {
            $this->errors[] = $e->getMessage();
            print '<pre>'.print_r($e->getMessage(),true).'</pre>';
        }
        //print '<tr><td><pre>'.print_r($response, true).'</pre></td></tr>';
        $responsedata = json_decode($response, true);
        $printers = $responsedata['printers'];
        // Check if we have printers?
        if(count($printers)==0) {
            // We dont have printers so return blank array
            $ret['available'] =  array();
        } else {
            // We have printers so returns printers as array
            $ret['available'] =  $printers;
        }
        return $ret;
    }

    /**
     *  Print selected file
     *
     * @param   string      $file       file
     * @param   string      $module     module
     * @param   string      $subdir     subdir for file
     * @return  int                     0 if OK, >0 if KO
     */
    function print_file($file, $module, $subdir='')
    {
        require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';

        global $conf, $user, $db;
        $error = 0;

        $fileprint=$conf->{$module}->dir_output;
        if ($subdir!='') $fileprint.='/'.$subdir;
        $fileprint.='/'.$file;
        $mimetype = dol_mimetype($fileprint);
        // select printer uri for module order, propal,...
        $sql = "SELECT rowid, printer_id, copy FROM ".MAIN_DB_PREFIX."printing WHERE module='".$module."' AND driver='printgcp' AND userid=".$user->id;
        $result = $db->query($sql);
        if ($result)
        {
            $obj = $this->db->fetch_object($result);
            if ($obj)
            {
                $printer_id = $obj->printer_id;
            }
            else
            {
                if (! empty($conf->global->PRINTING_GCP_DEFAULT))
                {
                    $printer_id=$conf->global->PRINTING_GCP_DEFAULT;
                }
                else
                {
                    $this->errors[] = 'NoDefaultPrinterDefined';
                    $error++;
                    return $error;
                }
            }
        }
        else dol_print_error($db);

        $ret = $this->sendPrintToPrinter($printer_id, $file, $fileprint, $mimetype);
        $this->errors = 'PRINTGCP: '.mb_convert_encoding($ret['errormessage'], "UTF-8");
        if ($ret['status']!=1) $error++;
        return $error;
    }

    /**
     *  Sends document to the printer
     *
     *  @param  string      $printerid      Printer id returned by Google Cloud Print
     *  @param  string      $printjobtitle  Job Title
     *  @param  string      $filepath       File Path to be send to Google Cloud Print
     *  @param  string      $contenttype    File content type by example application/pdf, image/png
     *  @return array                       status array
     */
    public function sendPrintToPrinter($printerid, $printjobtitle, $filepath, $contenttype)
    {
        // Check if printer id
        if(empty($printerid)) {
            return array('status' =>0, 'errorcode' =>'','errormessage'=>'No provided printer ID');
        }
        // Open the file which needs to be print
        $handle = fopen($filepath, "rb");
        if(!$handle) {
            return array('status' =>0, 'errorcode' =>'','errormessage'=>'Could not read the file.');
        }
        // Read file content
        $contents = fread($handle, filesize($filepath));
        fclose($handle);
        // Prepare post fields for sending print
        $post_fields = array('printerid' => $printerid,
                             'title' => $printjobtitle,
                             'contentTransferEncoding' => 'base64',
                             'content' => base64_encode($contents), // encode file content as base64
                             'contentType' => $contenttype
                            );
        // Dolibarr Token storage
        $storage = new DoliStorage($this->db, $this->conf);
        // Setup the credentials for the requests
        $credentials = new Credentials(
            $this->google_id,
            $this->google_secret,
            DOL_MAIN_URL_ROOT.'/core/modules/oauth/google_oauthcallback.php?service=google'
        );
        $serviceFactory = new \OAuth\ServiceFactory();
        $apiService = $serviceFactory->createService('Google', $credentials, $storage, array());

        // Check if we have auth token and refresh it
        $token_ok=true;
        try {
            $token = $storage->retrieveAccessToken('Google');
        } catch (Exception $e) {
            $this->errors[] = $e->getMessage();
            $token_ok = false;
        }
        if ($token_ok) {
            try {
                // il faut sauvegarder le refresh token car google ne le donne qu'une seule fois
                $refreshtoken = $token->getRefreshToken();
                $token = $apiService->refreshAccessToken($token);
                $token->setRefreshToken($refreshtoken);
                $storage->storeAccessToken('Google', $token);
            } catch (Exception $e) {
                $this->errors[] = $e->getMessage();
            }
        }

        // Send a request with api
        $response = json_decode($apiService->request(self::PRINT_URL, 'POST', $post_fields), true);
        //print '<tr><td><pre>'.print_r($response, true).'</pre></td></tr>';
        return array('status' =>$response['success'],'errorcode' =>$response['errorCode'],'errormessage'=>$response['message']);
    }


    /**
     *  List jobs print
     *
     *  @return  int                     0 if OK, >0 if KO
     */
    function list_jobs()
    {
        global $conf, $db, $langs, $bc;
        
        $error = 0;
        $html = '';
        // Token storage
        $storage = new DoliStorage($this->db, $this->conf);
        // Setup the credentials for the requests
        $credentials = new Credentials(
            $this->google_id,
            $this->google_secret,
            DOL_MAIN_URL_ROOT.'/core/modules/oauth/google_oauthcallback.php'
        );
        $serviceFactory = new \OAuth\ServiceFactory();
        $apiService = $serviceFactory->createService('Google', $credentials, $storage, array());
        // Check if we have auth token
        $token_ok=true;
        try {
            $token = $storage->retrieveAccessToken('Google');
        } catch (Exception $e) {
            $this->errors[] = $e->getMessage();
            $token_ok = false;
            $error++;
        }
        $expire = false;
        // Is token expired or will token expire in the next 30 seconds
        if ($token_ok) {
            $expire = ($token->getEndOfLife() !== -9002 && $token->getEndOfLife() !== -9001 && time() > ($token->getEndOfLife() - 30));
        }

        // Token expired so we refresh it
        if ($token_ok && $expire) {
            try {
                // il faut sauvegarder le refresh token car google ne le donne qu'une seule fois
                $refreshtoken = $token->getRefreshToken();
                $token = $apiService->refreshAccessToken($token);
                $token->setRefreshToken($refreshtoken);
                $storage->storeAccessToken('Google', $token);
            } catch (Exception $e) {
                $this->errors[] = $e->getMessage();
                $error++;
            }
        }
        // Getting Jobs
        // Send a request with api
        try {
            $response = $apiService->request(self::PRINTERS_GET_JOBS);
        } catch (Exception $e) {
            $this->errors[] = $e->getMessage();
            $error++;
        }
        $responsedata = json_decode($response, true);
        //$html .= '<pre>'.print_r($responsedata,true).'</pre>';
        $html .= '<table width="100%" class="noborder">';
        $html .= '<tr class="liste_titre">';
        $html .= "<td>Id</td>";
        $html .= "<td>Owner</td>";
        $html .= '<td>Printer</td>';
        $html .= '<td>File</td>';
        $html .= '<td>Status</td>';
        $html .= '<td>Cancel</td>';
        $html .= '</tr>'."\n";
        $var = True;
        $jobs = $responsedata['jobs'];
        //$html .= '<pre>'.print_r($jobs['0'],true).'</pre>';
        if (is_array($jobs))
        {
            foreach ($jobs as $value)
            {
                $var = !$var;
                $html .= '<tr '.$bc[$var].'>';
                $html .= '<td>'.$value['id'].'</td>';
                $html .= '<td>'.$value['ownerId'].'</td>';
                $html .= '<td>'.$value['printerName'].'</td>';
                $html .= '<td>'.$value['title'].'</td>';
                $html .= '<td>'.$value['status'].'</td>';
                $html .= '<td>&nbsp;</td>';
                $html .= '</tr>';
            }
        }
        else
        {
                $html .= '<tr '.$bc[$var].'>';
                $html .= '<td colspan="6" class="opacitymedium">'.$langs->trans("None").'</td>';
                $html .= '</tr>';
        }
        $html .= '</table>';
        
        $this->resprint = $html;
        
        return $error;
    }

}
