mirror of
https://git.code.sf.net/p/seeddms/code
synced 2024-10-04 15:12:30 +00:00
115 lines
3.1 KiB
PHP
115 lines
3.1 KiB
PHP
<?php
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/**
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* Implementation of conversion manager
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*
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* @category DMS
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* @package SeedDMS
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* @license GPL 2
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* @version @version@
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* @author Uwe Steinmann <uwe@steinmann.cx>
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* @copyright Copyright (C) 2021 Uwe Steinmann
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* @version Release: @package_version@
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*/
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require_once("inc/inc.ClassConversionServiceExec.php");
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require_once("inc/inc.ClassConversionServiceImageToImage.php");
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require_once("inc/inc.ClassConversionServiceImageToText.php");
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require_once("inc/inc.ClassConversionServicePdfToImage.php");
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require_once("inc/inc.ClassConversionServiceTextToText.php");
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require_once("inc/inc.ClassConversionServiceTextToImage.php");
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/**
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* Implementation of conversion manager
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*
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* @category DMS
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* @package SeedDMS
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* @author Uwe Steinmann <uwe@steinmann.cx>
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* @copyright Copyright (C) 2021 Uwe Steinmann
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* @version Release: @package_version@
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*/
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class SeedDMS_ConversionMgr {
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/**
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* List of services for converting documents
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*/
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public $services;
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/**
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* @var $success set to false if conversion failed
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*/
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protected $success;
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public function __construct() {
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$this->services = array();
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$this->success = true;
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}
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public function addService($service) {
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$service->setConversionMgr($this);
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$this->services[$service->from][$service->to][] = $service;
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return $service;
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}
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public function hasService($from, $to) {
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if(!empty($this->services[$from][$to]))
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return true;
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else
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return false;
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}
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/**
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* Return the service that would be tried first for converting
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* the document.
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*
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* The conversion manager may not use this service but choose a different
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* one when it fails.
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*/
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public function getService($from, $to) { /* {{{ */
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if(!empty($this->services[$from][$to]))
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return end($this->services[$from][$to]);
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else
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return null;
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} /* }}} */
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public function getServices() { /* {{{ */
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return $this->services;
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} /* }}} */
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public function wasSuccessful() { /* {{{ */
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return $this->success;
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} /* }}} */
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/**
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* Convert a file from one format into another format
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*
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* This method will try each conversion service until a service
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* fails or was successful. If a service succeeds it must not
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* return false, null, '' or 0
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*
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* @param string $file name of file to convert
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* @param string $from mimetype of input file
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* @param string $to mimetype of output file
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* @param string $target name of target file. If none is given the
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* content of the converted document will be returned.
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* @param array $params additional parameter needed for the conversion,
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* e.g. the width of an image
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*
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* @return boolean true on success, other false
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*/
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public function convert($file, $from, $to, $target=null, $params=array()) { /* {{{ */
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if(isset($this->services[$from][$to])) {
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$services = $this->services[$from][$to];
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for(end($services); key($services)!==null; prev($services)) {
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$service = current($services);
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$text = $service->convert($file, $target, $params);
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if(!$service->wasSuccessful()) {
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$this->success = false;
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return false;
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}
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if($text)
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return $text;
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}
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}
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return true;
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} /* }}} */
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}
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