seeddms-code/controllers/class.Preview.php

<?php
/**
 * Implementation of Preview controller
 *
 * @category   DMS
 * @package    SeedDMS
 * @license    GPL 2
 * @version    @version@
 * @author     Uwe Steinmann <uwe@steinmann.cx>
 * @copyright  Copyright (C) 2010-2013 Uwe Steinmann
 * @version    Release: @package_version@
 */

/**
 * Class which does the busines logic for previewing a document
 *
 * @category   DMS
 * @package    SeedDMS
 * @author     Uwe Steinmann <uwe@steinmann.cx>
 * @copyright  Copyright (C) 2010-2013 Uwe Steinmann
 * @version    Release: @package_version@
 */
class SeedDMS_Controller_Preview extends SeedDMS_Controller_Common {

	public function version() { /* {{{ */
		$dms = $this->params['dms'];
		$settings = $this->params['settings'];
		$conversionmgr = $this->params['conversionmgr'];

		$version = $this->params['version'];
		$document = $this->params['document'];
		$width = $this->params['width'];
		if($version < 1) {
			$content = $this->callHook('documentLatestContent', $document);
			if($content === null)
				$content = $document->getLatestContent();
		} else {
			$content = $this->callHook('documentContent', $document, $version);
			if($content === null)
				$content = $document->getContentByVersion($version);
		}
		if (!is_object($content)) {
			$this->errormsg = 'invalid_version';
			return false;
		}
		/* set params['content'] for compatiblity with older extensions which
		 * expect the content in the controller
		 */
		$this->params['content'] = $content;
		if(null === $this->callHook('version')) {
			if($width)
				$previewer = new SeedDMS_Preview_Previewer($settings->_cacheDir, $width, $settings->_cmdTimeout);
			else
				$previewer = new SeedDMS_Preview_Previewer($settings->_cacheDir);
			if($conversionmgr)
				$previewer->setConversionMgr($conversionmgr);
			else
				$previewer->setConverters($settings->_converters['preview']);
			$previewer->setXsendfile($settings->_enableXsendfile);
			if(!$previewer->hasPreview($content)) {
				add_log_line("");
				if(!$previewer->createPreview($content)) {
					add_log_line("", PEAR_LOG_ERR);
				}
			}
			if(!$previewer->hasPreview($content)) {
				return false;
			}
			header('Content-Type: image/png');
			$previewer->getPreview($content);
			return true;
		}
	} /* }}} */

	public function file() { /* {{{ */
		$dms = $this->params['dms'];
		$settings = $this->params['settings'];
		$conversionmgr = $this->params['conversionmgr'];

		$object = $this->params['object'];
		$document = $this->params['document'];
		$width = $this->params['width'];
		if (!is_object($object)) {
			$this->errormsg = 'invalid_version';
			return false;
		}

		if(null === $this->callHook('file')) {
			if($width)
				$previewer = new SeedDMS_Preview_Previewer($settings->_cacheDir, $width, $settings->_cmdTimeout);
			else
				$previewer = new SeedDMS_Preview_Previewer($settings->_cacheDir);
			if($conversionmgr)
				$previewer->setConversionMgr($conversionmgr);
			else
				$previewer->setConverters($settings->_converters['preview']);
			$previewer->setXsendfile($settings->_enableXsendfile);

			if(!$previewer->hasPreview($object)) {
				add_log_line("");
				if(!$previewer->createPreview($object)) {
					add_log_line("", PEAR_LOG_ERR);
				}
			}
			if(!$previewer->hasPreview($object)) {
				return false;
			}
			header('Content-Type: image/png');
			$previewer->getPreview($object);
			return true;
		}
	} /* }}} */

}