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<?php |
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// Copyright (C) 2014 Universitätsbibliothek Mannheim |
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// See file LICENSE for license details. |
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// Authors: Alexander Wagner, Stefan Weil |
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// Test whether the script was called directly (used for unit test). |
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if (!isset($unittest)) { |
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$unittest = array(); |
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} |
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$unittest[__FILE__] = (sizeof(get_included_files()) == 1); |
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class FehHandler extends FileHandler |
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{ |
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function getControls() |
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{ |
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return FileHandler::CURSOR | FileHandler::ZOOM; |
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} |
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function show($path) |
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{ |
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} |
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} |
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class LibreOfficeHandler extends FileHandler |
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{ |
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function getControls() |
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{ |
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return FileHandler::CURSOR | FileHandler::ZOOM; |
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} |
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function show($path) |
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{ |
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} |
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} |
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class MidoriHandler extends FileHandler |
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{ |
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function getControls() |
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{ |
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return FileHandler::CURSOR | FileHandler::ZOOM; |
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} |
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function show($path) |
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{ |
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} |
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} |
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class VlcHandler extends FileHandler |
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{ |
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function getControls() |
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{ |
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return FileHandler::CURSOR | FileHandler::ZOOM; |
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} |
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function show($path) |
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{ |
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} |
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} |
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class ZathuraHandler extends FileHandler |
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{ |
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function getControls() |
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{ |
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return FileHandler::CURSOR | FileHandler::ZOOM | |
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FileHandler::HOME | FileHandler::END | |
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FileHandler::PRIOR | FileHandler::NEXT | |
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FileHandler::DOWNLOAD; |
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} |
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function show($path) |
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{ |
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} |
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} |
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abstract class FileHandler |
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{ |
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// Constants for allowed controls. |
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const UP = 1; |
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const DOWN = 2; |
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const LEFT = 4; |
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const RIGHT = 8; |
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const ZOOMIN = 16; |
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const ZOOMOUT = 32; |
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const HOME = 64; |
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const END = 128; |
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const PRIOR = 256; |
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const NEXT = 512; |
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const DOWNLOAD = 1024; |
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const COUNTERCLOCKWISE = 2048; |
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const CLOCKWISE = 4096; |
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// Shortcuts for combinations of controls. |
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const CURSOR = 15; // UP | DOWN | LEFT | RIGHT |
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const ZOOM = 48; // ZOOMIN | ZOOMOUT |
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const ALL = 2047; |
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// up down left right zoomin zoomout home end prior next download |
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// protected $FILES = array(); |
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// protected $UPLOAD_PATH; |
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abstract protected function getControls(); |
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abstract protected function show($path); |
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public static function getFileHandler($file) |
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{ |
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// Get get directory, name and file extension |
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$pathParts = pathinfo($file); |
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$ftype = strtolower($pathParts['extension']); |
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$fdir = $pathParts['dirname']; |
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$fname = $pathParts['filename']; |
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$fhandler = ""; |
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// Define filehandlers |
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$pdfHandler = '/usr/bin/zathura'; |
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$imageHandler = '/usr/bin/feh --scale-down'; |
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$webHandler = '/usr/bin/midori -p'; |
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$avHandler = '/usr/bin/cvlc --no-audio'; |
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$officeApp = ""; |
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// $params; |
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// echo $ftype; |
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if ($ftype === 'pdf') { |
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$fhandler=$pdfHandler; |
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} elseif ($ftype === 'gif' || $ftype === 'jpg' || $ftype === 'png') { |
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$fhandler=$imageHandler; |
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} elseif ($ftype === 'html' || $ftype === 'url') { |
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$fhandler=$webHandler; |
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} elseif ($ftype === 'mpg' || $ftype === 'mpeg' || $ftype === 'avi' || |
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$ftype === 'mp3' || $ftype === 'mp4') { |
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$fhandler=$avHandler; |
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} else { |
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if ($ftype === 'doc' || $ftype === 'docx' || $ftype === 'odt' || $ftype === 'txt') { |
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$officeApp = "writer"; |
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} elseif ($ftype === 'ppt' || $ftype === 'pptx' || $ftype === 'pps' || $ftype === 'ppsx' || $ftype === 'odp') { |
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$officeApp = "impress"; |
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} elseif ($ftype === 'xls' || $ftype === 'xlsx' || $ftype === 'ods') { |
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$officeApp = "calc"; |
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} |
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$convertedFile = convertOffice($file, $officeApp, $fdir, $fname); |
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if ($convertedFile) { |
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$file = $convertedFile; |
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$fhandler = $pdfHandler; |
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} else { |
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$fhandler = "/usr/bin/libreoffice --'$officeApp' --nologo --norestore -o"; |
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} |
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} |
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/* |
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alternatively with mime-types |
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// $ftype = mime_content_type($this->UPLOAD_PATH.$file); |
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// if($ftype=='application/pdf') |
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// if($ftype=='image/gif' || $ftype=='image/jpg' || $ftype=='image/png' ) |
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// if($ftype=='html' || $ftype=='url' || $ftype="text/plain") |
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// (...) |
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*/ |
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return array($fhandler, $file); |
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} |
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} |
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function convertOffice($inputFile, $office, $outputDir, $fileName) |
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{ |
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shell_exec("/usr/bin/libreoffice --headless --convert-to pdf:'$office'_pdf_Export --outdir '$outputDir' '$inputFile' >/dev/null 2>&1"); |
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$newFile=$outputDir . '/' . $fileName . '.pdf'; |
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if (file_exists($newFile)) { |
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return $newFile; |
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} else { |
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return false; |
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} |
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} |
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if ($unittest[__FILE__]) { |
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// Run unit test. |
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$midoriHandler = new MidoriHandler; |
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$zathuraHandler = new ZathuraHandler; |
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echo("DOWNLOAD =" . FileHandler::DOWNLOAD . "\n"); |
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echo("filehandler=" . FileHandler::getFileHandler("test.txt") . "\n"); |
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$handler = ${'midori' . 'Handler'}; |
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echo("controls =" . $handler->getControls() . "\n"); |
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} |
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Adding explicit visibility (
private,protected, orpublic) is generally recommend to communicate to other developers how, and from where this method is intended to be used.