add QrcodesAgent
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oliver
parent
d7095c005a
commit
a31252d81b
4 changed files with 310 additions and 1 deletions
38
agents/intermediate/QrcodesAgent.inc
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38
agents/intermediate/QrcodesAgent.inc
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<?php
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/**
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* The Legend of Z
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*
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* @author Oliver Hanraths <oliver.hanraths@uni-duesseldorf.de>
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* @copyright 2014 Heinrich-Heine-Universität Düsseldorf
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* @license http://www.gnu.org/licenses/gpl.html
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* @link https://bitbucket.org/coderkun/the-legend-of-z
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*/
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namespace hhu\z\agents\intermediate;
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/**
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* Agent to generate and show QR-codes.
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*
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* @author Oliver Hanraths <oliver.hanraths@uni-duesseldorf.de>
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*/
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class QrcodesAgent extends \nre\agents\IntermediateAgent
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{
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/**
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* Action: index.
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*
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* @param \nre\core\Request $request Current request
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* @param \nre\core\Response $response Current response
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*/
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public function index(\nre\core\Request $request, \nre\core\Response $response)
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{
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}
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}
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?>
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@ -319,7 +319,8 @@
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array('^pages/([^/]+)/(edit|delete)$', 'pages/$2/$1', true),
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array('^pages/(?!(create|edit|delete))/?', 'pages/page/$1', true),
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array('^media/(.*)$', 'media/$1?layout=binary', false),
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array('^uploads/(.*)$', 'uploads/$1?layout=binary', false)
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array('^uploads/(.*)$', 'uploads/$1?layout=binary', false),
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array('^qrcodes/(.*)$', 'qrcodes/$1?layout=binary', false)
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);
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269
controllers/QrcodesController.inc
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269
controllers/QrcodesController.inc
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<?php
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/**
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* The Legend of Z
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*
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* @author Oliver Hanraths <oliver.hanraths@uni-duesseldorf.de>
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* @copyright 2014 Heinrich-Heine-Universität Düsseldorf
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* @license http://www.gnu.org/licenses/gpl.html
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* @link https://bitbucket.org/coderkun/the-legend-of-z
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*/
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namespace hhu\z\controllers;
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/**
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* Controller of the QrcodeAgent to generate and show QR-codes.
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*
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* @author Oliver Hanraths <oliver.hanraths@uni-duesseldorf.de>
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*/
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class QrcodesController extends \hhu\z\controllers\SeminaryController
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{
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/**
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* Required models
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*
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* @var array
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*/
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public $models = array('seminaries', 'charactergroups', 'charactergroupsquests', 'charactergroupsqueststations');
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/**
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* Prefilter.
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*
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* @param \nre\core\Request $request Current request
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* @param \nre\core\Response $response Current response
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*/
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public function preFilter(\nre\core\Request $request, \nre\core\Response $response)
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{
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parent::preFilter($request, $response);
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// Set headers for caching control
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$response->addHeader("Pragma: public");
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$response->addHeader("Cache-control: must-revalidate");
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$response->addHeader("Date: ".gmdate(\DateTime::RFC822));
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}
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/**
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* Action: charactergroupsqueststation
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*
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* Display a QR-code for a Character groups Quest station.
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*
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* @throws \nre\exceptions\IdNotFoundException
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* @param string $seminaryUrl URL-Title of a Seminary
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* @param string $groupsgroupUrl URL-Title of a Character groups-group
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* @param string $questUrl URL-Title of a Character groups Quest
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* @param string $stationUrl URL of Character groups Quest station
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*/
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public function charactergroupsqueststation($seminaryUrl, $groupsgroupUrl, $questUrl, $stationUrl, $size=1)
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{
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// Get seminary
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$seminary = $this->Seminaries->getSeminaryByUrl($seminaryUrl);
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// Get Character groups-group
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$groupsgroup = $this->Charactergroups->getGroupsgroupByUrl($seminary['id'], $groupsgroupUrl);
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// Get Character groups Quests
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$quest = $this->Charactergroupsquests->getQuestByUrl($groupsgroup['id'], $questUrl);
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// Get station
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$station = $this->Charactergroupsqueststations->getStationByUrl($quest['id'], $stationUrl);
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// Generate QR-code
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$url = $this->linker->link(array('qr', 'cgqs', $station['id']), 0, true, null, true, null, true);
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$file = $this->generateQRcode($url, $size);
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if(is_null($file)) {
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return;
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}
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// Pass data to view
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$this->set('file', $file);
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}
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/**
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* Determine file information and set the HTTP-header for
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* caching accordingly.
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*
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* @param string $fileName Filename
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* @return boolean HTTP-status 304 was set (in cache)
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*/
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private function setCacheHeaders($fileName)
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{
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// Determine last change of file
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$fileLastModified = gmdate('r', filemtime($fileName));
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// Generate E-Tag
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$fileEtag = hash('sha256', $fileLastModified.$fileName);
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// Set header
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$this->response->addHeader("Last-Modified: ".$fileLastModified);
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$this->response->addHeader("Etag: ".$fileEtag);
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// HTTP-status
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$headerModifiedSince = $this->request->getServerParam('HTTP_IF_MODIFIED_SINCE');
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$headerNoneMatch = $this->request->getServerParam('HTTP_IF_NONE_MATCH');
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if(
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!is_null($headerModifiedSince) && strtotime($fileLastModified) <= strtotime($headerModifiedSince) &&
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!is_null($headerNoneMatch) && $headerNoneMatch == $fileEtag
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) {
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$this->response->setExit(true);
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$this->response->addHeader(\nre\core\WebUtils::getHttpHeader(304));
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return true;
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}
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return false;
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}
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private function generateQRcode($text, $size)
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{
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\hhu\z\lib\Phpqrcode::load();
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\QRcode::png($text, false, QR_ECLEVEL_L, intval($size), 1);
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return null;
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}
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/**
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* Determine the file for a medium and process it if necessary.
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*
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* @throws \nre\exceptions\IdNotFoundException
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* @throws \nre\exceptions\ParamsNotValidException
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* @param array $media Medium to get file for
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* @param string $action Action for processing the media
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* @return object File for the medium (or null if medium is cached)
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*/
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private function getMediaFile($media, $action=null)
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{
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// Get format
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$format = explode('/', $media['mimetype']);
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$format = $format[1];
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// Set content-type
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$this->response->addHeader("Content-type: ".$media['mimetype']."");
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// Set filename
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$media['filename'] = ROOT.DS.\nre\configs\AppConfig::$dirs['seminarymedia'].DS.$media['id'];
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if(!file_exists($media['filename'])) {
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throw new \nre\exceptions\IdNotFoundException($media['id'].': '.$media['url']);
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}
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// Cache
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if($this->setCacheHeaders($media['filename'])) {
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return null;
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}
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// Load and process file
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$file = null;
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if(is_null($action) || !in_array(strtoupper($format), self::getImageTypes()))
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{
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// Do not process the file
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$file = file_get_contents($media['filename']);
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}
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else
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{
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// Process file
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switch($action)
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{
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case 'questgroup':
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case 'quest':
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case 'avatar':
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case 'charactergroup':
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case 'charactergroupsquest':
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$file = self::resizeImage(
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$media['filename'],
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$format,
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\nre\configs\AppConfig::$media[$action]['width'],
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\nre\configs\AppConfig::$media[$action]['height']
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);
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break;
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default:
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throw new ParamsNotValidException($action);
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break;
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}
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}
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// Return file
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return $file;
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}
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/**
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* Get supported image types.
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*
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* @return array List of supported image types
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*/
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private static function getImageTypes()
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{
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$im = new \Imagick();
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return $im->queryFormats();
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}
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/**
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* Resize an image.
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*
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* @param string $fileName Absolute pathname of image to resize
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* @param string $mimeType Mimetype of target image
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* @param int $width Max. width to resize to
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* @param int $height Max. height to resize to
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* @return mixed Resized image
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*/
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private static function resizeImage($fileName, $mimeType, $width, $height)
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{
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// Read image from cache
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$tempFileName = ROOT.DS.\nre\configs\AppConfig::$dirs['temporary'].DS.'media-'.basename($fileName).'-'.$width.'x'.$height;
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if(file_exists($tempFileName))
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{
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// Check age of file
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if(filemtime($fileName) > filemtime($tempFileName)) {
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// Too old, delete
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unlink($tempFileName);
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}
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else {
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// Valid, read and return
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return file_get_contents($tempFileName);
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}
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}
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// ImageMagick
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$im = new \Imagick($fileName);
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// Calculate new size
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$geometry = $im->getImageGeometry();
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if($geometry['width'] < $width) {
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$width = $geometry['width'];
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}
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if($geometry['height'] < $height) {
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$height = $geometry['width'];
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}
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// Process
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$im->thumbnailImage($width, $height, true);
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$im->contrastImage(1);
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$im->setImageFormat($mimeType);
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// Save temporary file
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$im->writeImage($tempFileName);
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// Return resized image
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return $im;
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}
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}
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?>
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1
views/binary/qrcodes/charactergroupsqueststation.tpl
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1
views/binary/qrcodes/charactergroupsqueststation.tpl
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<?=$file?>
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