736 lines
22 KiB
PHP
736 lines
22 KiB
PHP
<?php
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/**
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* PHP EPub Meta library
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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* @author Sébastien Lucas <sebastien@slucas.fr>
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*/
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require_once('tbszip.php');
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define ("METADATA_FILE", "META-INF/container.xml");
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class EPub {
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public $xml; //FIXME change to protected, later
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public $toc;
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protected $xpath;
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protected $toc_xpath;
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protected $file;
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protected $meta;
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protected $zip;
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protected $coverpath='';
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protected $namespaces;
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protected $imagetoadd='';
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/**
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* Constructor
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*
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* @param string $file path to epub file to work on
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* @throws Exception if metadata could not be loaded
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*/
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public function __construct($file){
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// open file
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$this->file = $file;
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$this->zip = new clsTbsZip();
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if(!$this->zip->Open($this->file)){
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throw new Exception('Failed to read epub file');
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}
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// read container data
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if (!$this->zip->FileExists(METADATA_FILE)) {
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throw new Exception ("Unable to find metadata.xml");
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}
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$data = $this->zip->FileRead(METADATA_FILE);
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if($data == false){
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throw new Exception('Failed to access epub container data');
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}
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$xml = new DOMDocument();
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$xml->registerNodeClass('DOMElement','EPubDOMElement');
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$xml->loadXML($data);
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$xpath = new EPubDOMXPath($xml);
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$nodes = $xpath->query('//n:rootfiles/n:rootfile[@media-type="application/oebps-package+xml"]');
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$this->meta = $nodes->item(0)->attr('full-path');
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// load metadata
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if (!$this->zip->FileExists($this->meta)) {
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throw new Exception ("Unable to find " . $this->meta);
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}
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$data = $this->zip->FileRead($this->meta);
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if(!$data){
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throw new Exception('Failed to access epub metadata');
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}
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$this->xml = new DOMDocument();
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$this->xml->registerNodeClass('DOMElement','EPubDOMElement');
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$this->xml->loadXML($data);
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$this->xml->formatOutput = true;
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$this->xpath = new EPubDOMXPath($this->xml);
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}
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public function initSpineComponent ()
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{
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$spine = $this->xpath->query('//opf:spine')->item(0);
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$tocid = $spine->getAttribute('toc');
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$tochref = $this->xpath->query("//opf:manifest/opf:item[@id='$tocid']")->item(0)->attr('href');
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$tocpath = dirname($this->meta).'/'.$tochref;
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// read epub toc
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if (!$this->zip->FileExists($tocpath)) {
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throw new Exception ("Unable to find " . $tocpath);
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}
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$data = $this->zip->FileRead($tocpath);
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$this->toc = new DOMDocument();
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$this->toc->registerNodeClass('DOMElement','EPubDOMElement');
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$this->toc->loadXML($data);
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$this->toc_xpath = new EPubDOMXPath($this->toc);
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$rootNamespace = $this->toc->lookupNamespaceUri($this->toc->namespaceURI);
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$this->toc_xpath->registerNamespace('x', $rootNamespace);
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}
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/**
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* file name getter
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*/
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public function file(){
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return $this->file;
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}
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/**
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* Close the epub file
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*/
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public function close (){
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$this->zip->FileCancelModif($this->meta);
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// TODO : Add cancelation of cover image
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$this->zip->Close ();
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}
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/**
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* Remove iTunes files
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*/
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public function cleanITunesCrap () {
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if ($this->zip->FileExists("iTunesMetadata.plist")) {
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$this->zip->FileReplace ("iTunesMetadata.plist", false);
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}
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if ($this->zip->FileExists("iTunesArtwork")) {
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$this->zip->FileReplace ("iTunesArtwork", false);
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}
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}
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/**
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* Writes back all meta data changes
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*/
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public function save(){
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$this->download ();
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$this->zip->close();
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}
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/**
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* Get the updated epub
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*/
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public function download($file=false){
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$this->zip->FileReplace($this->meta,$this->xml->saveXML());
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// add the cover image
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if($this->imagetoadd){
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$this->zip->FileReplace($this->coverpath,file_get_contents($this->imagetoadd));
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$this->imagetoadd='';
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}
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if ($file) $this->zip->Flush(TBSZIP_DOWNLOAD, $file);
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}
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/**
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* Get the components list as an array
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*/
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public function components(){
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$spine = array();
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$nodes = $this->xpath->query('//opf:spine/opf:itemref');
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foreach($nodes as $node){
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$idref = $node->getAttribute('idref');
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$spine[] = $this->xpath->query("//opf:manifest/opf:item[@id='$idref']")->item(0)->getAttribute('href');
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}
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return $spine;
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}
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/**
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* Get the component content
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*/
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public function component($comp) {
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$path = dirname($this->meta).'/'.$comp;
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if (!$this->zip->FileExists($path)) {
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throw new Exception ("Unable to find " . $path);
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}
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$data = $this->zip->FileRead($path);
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$data = preg_replace ("/src=[\"']([\w\/\.]*?)[\"']/", "src='epubfs.php?comp=$1'", $data);
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$data = preg_replace ("/href=[\"']([\w\/\.]*?)[\"']/", "href='epubfs.php?comp=$1'", $data);
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return $data;
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}
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/**
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* Get the component content type
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*/
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public function componentContentType($comp) {
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return $this->xpath->query("//opf:manifest/opf:item[@href='$comp']")->item(0)->getAttribute('media-type');
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}
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/**
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* Get the Epub content (TOC) as an array
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*
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* For each chapter there is a "title" and a "src"
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*/
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public function contents(){
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$contents = array();
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$nodes = $this->toc_xpath->query('//x:ncx/x:navMap/x:navPoint');
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foreach($nodes as $node){
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$title = $this->toc_xpath->query('x:navLabel/x:text', $node)->item(0)->nodeValue;
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$src = $this->toc_xpath->query('x:content', $node)->item(0)->attr('src');
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$contents[] = array("title" => $title, "src" => $src);
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}
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return $contents;
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}
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/**
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* Get or set the book author(s)
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*
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* Authors should be given with a "file-as" and a real name. The file as
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* is used for sorting in e-readers.
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*
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* Example:
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*
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* array(
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* 'Pratchett, Terry' => 'Terry Pratchett',
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* 'Simpson, Jacqeline' => 'Jacqueline Simpson',
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* )
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*
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* @params array $authors
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*/
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public function Authors($authors=false){
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// set new data
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if($authors !== false){
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// Author where given as a comma separated list
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if(is_string($authors)){
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if($authors == ''){
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$authors = array();
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}else{
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$authors = explode(',',$authors);
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$authors = array_map('trim',$authors);
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}
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}
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// delete existing nodes
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$nodes = $this->xpath->query('//opf:metadata/dc:creator[@opf:role="aut"]');
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foreach($nodes as $node) $node->delete();
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// add new nodes
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$parent = $this->xpath->query('//opf:metadata')->item(0);
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foreach($authors as $as => $name){
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if(is_int($as)) $as = $name; //numeric array given
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$node = $parent->newChild('dc:creator',$name);
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$node->attr('opf:role', 'aut');
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$node->attr('opf:file-as', $as);
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}
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$this->reparse();
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}
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// read current data
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$rolefix = false;
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$authors = array();
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$nodes = $this->xpath->query('//opf:metadata/dc:creator[@opf:role="aut"]');
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if($nodes->length == 0){
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// no nodes where found, let's try again without role
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$nodes = $this->xpath->query('//opf:metadata/dc:creator');
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$rolefix = true;
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}
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foreach($nodes as $node){
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$name = $node->nodeValue;
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$as = $node->attr('opf:file-as');
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if(!$as){
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$as = $name;
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$node->attr('opf:file-as',$as);
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}
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if($rolefix){
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$node->attr('opf:role','aut');
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}
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$authors[$as] = $name;
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}
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return $authors;
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}
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/**
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* Set or get the book title
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*
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* @param string $title
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*/
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public function Title($title=false){
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return $this->getset('dc:title',$title);
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}
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/**
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* Set or get the book's language
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*
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* @param string $lang
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*/
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public function Language($lang=false){
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return $this->getset('dc:language',$lang);
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}
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/**
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* Set or get the book' publisher info
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*
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* @param string $publisher
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*/
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public function Publisher($publisher=false){
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return $this->getset('dc:publisher',$publisher);
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}
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/**
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* Set or get the book's copyright info
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*
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* @param string $rights
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*/
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public function Copyright($rights=false){
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return $this->getset('dc:rights',$rights);
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}
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/**
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* Set or get the book's description
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*
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* @param string $description
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*/
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public function Description($description=false){
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return $this->getset('dc:description',$description);
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}
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/**
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* Set or get the book's ISBN number
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*
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* @param string $isbn
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*/
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public function ISBN($isbn=false){
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return $this->getset('dc:identifier',$isbn,'opf:scheme','ISBN');
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}
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/**
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* Set or get the Google Books ID
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*
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* @param string $google
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*/
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public function Google($google=false){
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return $this->getset('dc:identifier',$google,'opf:scheme','GOOGLE');
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}
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/**
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* Set or get the Amazon ID of the book
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*
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* @param string $amazon
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*/
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public function Amazon($amazon=false){
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return $this->getset('dc:identifier',$amazon,'opf:scheme','AMAZON');
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}
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/**
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* Set or get the Calibre UUID of the book
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*
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* @param string $uuid
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*/
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public function Calibre($uuid=false){
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return $this->getset('dc:identifier',$uuid,'opf:scheme','calibre');
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}
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/**
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* Set or get the Serie of the book
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*
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* @param string $serie
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*/
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public function Serie($serie=false){
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return $this->getset('opf:meta',$serie,'name','calibre:series','content');
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}
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/**
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* Set or get the Serie Index of the book
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*
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* @param string $serieIndex
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*/
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public function SerieIndex($serieIndex=false){
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return $this->getset('opf:meta',$serieIndex,'name','calibre:series_index','content');
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}
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/**
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* Set or get the book's subjects (aka. tags)
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*
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* Subject should be given as array, but a comma separated string will also
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* be accepted.
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*
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* @param array $subjects
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*/
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public function Subjects($subjects=false){
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// setter
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if($subjects !== false){
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if(is_string($subjects)){
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if($subjects === ''){
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$subjects = array();
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}else{
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$subjects = explode(',',$subjects);
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$subjects = array_map('trim',$subjects);
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}
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}
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// delete previous
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$nodes = $this->xpath->query('//opf:metadata/dc:subject');
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foreach($nodes as $node){
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$node->delete();
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}
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// add new ones
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$parent = $this->xpath->query('//opf:metadata')->item(0);
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foreach($subjects as $subj){
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$node = $this->xml->createElement('dc:subject',htmlspecialchars($subj));
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$node = $parent->appendChild($node);
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}
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$this->reparse();
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}
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//getter
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$subjects = array();
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$nodes = $this->xpath->query('//opf:metadata/dc:subject');
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foreach($nodes as $node){
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$subjects[] = $node->nodeValue;
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}
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return $subjects;
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}
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/**
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* Read the cover data
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*
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* Returns an associative array with the following keys:
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*
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* mime - filetype (usually image/jpeg)
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* data - the binary image data
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* found - the internal path, or false if no image is set in epub
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*
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* When no image is set in the epub file, the binary data for a transparent
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* GIF pixel is returned.
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*
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* When adding a new image this function return no or old data because the
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* image contents are not in the epub file, yet. The image will be added when
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* the save() method is called.
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*
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* @param string $path local filesystem path to a new cover image
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* @param string $mime mime type of the given file
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* @return array
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*/
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public function Cover($path=false, $mime=false){
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// set cover
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if($path !== false){
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// remove current pointer
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$nodes = $this->xpath->query('//opf:metadata/opf:meta[@name="cover"]');
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foreach($nodes as $node) $node->delete();
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// remove previous manifest entries if they where made by us
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$nodes = $this->xpath->query('//opf:manifest/opf:item[@id="php-epub-meta-cover"]');
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foreach($nodes as $node) $node->delete();
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if($path){
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// add pointer
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$parent = $this->xpath->query('//opf:metadata')->item(0);
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$node = $parent->newChild('opf:meta');
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$node->attr('opf:name','cover');
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$node->attr('opf:content','php-epub-meta-cover');
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// add manifest
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$parent = $this->xpath->query('//opf:manifest')->item(0);
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$node = $parent->newChild('opf:item');
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$node->attr('id','php-epub-meta-cover');
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$node->attr('opf:href','php-epub-meta-cover.img');
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$node->attr('opf:media-type',$mime);
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// remember path for save action
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$this->imagetoadd = $path;
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}
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$this->reparse();
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}
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// load cover
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$nodes = $this->xpath->query('//opf:metadata/opf:meta[@name="cover"]');
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if(!$nodes->length) return $this->no_cover();
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$coverid = (String) $nodes->item(0)->attr('opf:content');
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if(!$coverid) return $this->no_cover();
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$nodes = $this->xpath->query('//opf:manifest/opf:item[@id="'.$coverid.'"]');
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if(!$nodes->length) return $this->no_cover();
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$mime = $nodes->item(0)->attr('opf:media-type');
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$path = $nodes->item(0)->attr('opf:href');
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$path = dirname('/'.$this->meta).'/'.$path; // image path is relative to meta file
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$path = ltrim($path,'/');
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$zip = new ZipArchive();
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if(!@$zip->open($this->file)){
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throw new Exception('Failed to read epub file');
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}
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$data = $zip->getFromName($path);
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return array(
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'mime' => $mime,
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'data' => $data,
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'found' => $path
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);
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}
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public function getCoverItem () {
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$nodes = $this->xpath->query('//opf:metadata/opf:meta[@name="cover"]');
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if(!$nodes->length) return NULL;
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$coverid = (String) $nodes->item(0)->attr('opf:content');
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if(!$coverid) return NULL;
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$nodes = $this->xpath->query('//opf:manifest/opf:item[@id="'.$coverid.'"]');
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if(!$nodes->length) return NULL;
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return $nodes->item(0);
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}
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public function updateForKepub () {
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$item = $this->getCoverItem ();
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if (!is_null ($item)) {
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$item->attr('opf:properties', 'cover-image');
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}
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}
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public function Cover2($path=false, $mime=false){
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$hascover = true;
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$item = $this->getCoverItem ();
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if (is_null ($item)) {
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$hascover = false;
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} else {
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$mime = $item->attr('opf:media-type');
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$this->coverpath = $item->attr('opf:href');
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$this->coverpath = dirname('/'.$this->meta).'/'.$this->coverpath; // image path is relative to meta file
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$this->coverpath = ltrim($this->coverpath,'\\');
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$this->coverpath = ltrim($this->coverpath,'/');
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}
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// set cover
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if($path !== false){
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if (!$hascover) return; // TODO For now only update
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if($path){
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$item->attr('opf:media-type',$mime);
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// remember path for save action
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$this->imagetoadd = $path;
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}
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$this->reparse();
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}
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if (!$hascover) return $this->no_cover();
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}
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/**
|
|
* A simple getter/setter for simple meta attributes
|
|
*
|
|
* It should only be used for attributes that are expected to be unique
|
|
*
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|
* @param string $item XML node to set/get
|
|
* @param string $value New node value
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|
* @param string $att Attribute name
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|
* @param string $aval Attribute value
|
|
* @param string $datt Destination attribute
|
|
*/
|
|
protected function getset($item,$value=false,$att=false,$aval=false,$datt=false){
|
|
// construct xpath
|
|
$xpath = '//opf:metadata/'.$item;
|
|
if($att){
|
|
$xpath .= "[@$att=\"$aval\"]";
|
|
}
|
|
|
|
// set value
|
|
if($value !== false){
|
|
$value = htmlspecialchars($value);
|
|
$nodes = $this->xpath->query($xpath);
|
|
if($nodes->length == 1 ){
|
|
if($value === ''){
|
|
// the user want's to empty this value -> delete the node
|
|
$nodes->item(0)->delete();
|
|
}else{
|
|
// replace value
|
|
if ($datt){
|
|
$nodes->item(0)->attr ($datt, $value);
|
|
}else{
|
|
$nodes->item(0)->nodeValue = $value;
|
|
}
|
|
}
|
|
}else{
|
|
// if there are multiple matching nodes for some reason delete
|
|
// them. we'll replace them all with our own single one
|
|
foreach($nodes as $n) $n->delete();
|
|
// readd them
|
|
if($value){
|
|
$parent = $this->xpath->query('//opf:metadata')->item(0);
|
|
|
|
$node = $parent->newChild ($item);
|
|
if($att) $node->attr($att,$aval);
|
|
if ($datt){
|
|
$node->attr ($datt, $value);
|
|
}else{
|
|
$node->nodeValue = $value;
|
|
}
|
|
}
|
|
}
|
|
|
|
$this->reparse();
|
|
}
|
|
|
|
// get value
|
|
$nodes = $this->xpath->query($xpath);
|
|
if($nodes->length){
|
|
if ($datt){
|
|
return $nodes->item(0)->attr ($datt);
|
|
}else{
|
|
return $nodes->item(0)->nodeValue;
|
|
}
|
|
}else{
|
|
return '';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return a not found response for Cover()
|
|
*/
|
|
protected function no_cover(){
|
|
return array(
|
|
'data' => base64_decode('R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAEALAAAAAABAAEAAAIBTAA7'),
|
|
'mime' => 'image/gif',
|
|
'found' => false
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Reparse the DOM tree
|
|
*
|
|
* I had to rely on this because otherwise xpath failed to find the newly
|
|
* added nodes
|
|
*/
|
|
protected function reparse() {
|
|
$this->xml->loadXML($this->xml->saveXML());
|
|
$this->xpath = new EPubDOMXPath($this->xml);
|
|
}
|
|
}
|
|
|
|
class EPubDOMXPath extends DOMXPath {
|
|
public function __construct(DOMDocument $doc){
|
|
parent::__construct($doc);
|
|
|
|
if(is_a($doc->documentElement, 'EPubDOMElement')){
|
|
foreach($doc->documentElement->namespaces as $ns => $url){
|
|
$this->registerNamespace($ns,$url);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
class EPubDOMElement extends DOMElement {
|
|
public $namespaces = array(
|
|
'n' => 'urn:oasis:names:tc:opendocument:xmlns:container',
|
|
'opf' => 'http://www.idpf.org/2007/opf',
|
|
'dc' => 'http://purl.org/dc/elements/1.1/'
|
|
);
|
|
|
|
|
|
public function __construct($name, $value='', $namespaceURI=''){
|
|
list($ns,$name) = $this->splitns($name);
|
|
$value = htmlspecialchars($value);
|
|
if(!$namespaceURI && $ns){
|
|
$namespaceURI = $this->namespaces[$ns];
|
|
}
|
|
parent::__construct($name, $value, $namespaceURI);
|
|
}
|
|
|
|
|
|
/**
|
|
* Create and append a new child
|
|
*
|
|
* Works with our epub namespaces and omits default namespaces
|
|
*/
|
|
public function newChild($name, $value=''){
|
|
list($ns,$local) = $this->splitns($name);
|
|
if($ns){
|
|
$nsuri = $this->namespaces[$ns];
|
|
if($this->isDefaultNamespace($nsuri)){
|
|
$name = $local;
|
|
$nsuri = '';
|
|
}
|
|
}
|
|
|
|
// this doesn't call the construcor: $node = $this->ownerDocument->createElement($name,$value);
|
|
$node = new EPubDOMElement($name,$value,$nsuri);
|
|
return $this->appendChild($node);
|
|
}
|
|
|
|
/**
|
|
* Split given name in namespace prefix and local part
|
|
*
|
|
* @param string $name
|
|
* @return array (namespace, name)
|
|
*/
|
|
public function splitns($name){
|
|
$list = explode(':',$name,2);
|
|
if(count($list) < 2) array_unshift($list,'');
|
|
return $list;
|
|
}
|
|
|
|
/**
|
|
* Simple EPub namespace aware attribute accessor
|
|
*/
|
|
public function attr($attr,$value=null){
|
|
list($ns,$attr) = $this->splitns($attr);
|
|
|
|
$nsuri = '';
|
|
if($ns){
|
|
$nsuri = $this->namespaces[$ns];
|
|
if(!$this->namespaceURI){
|
|
if($this->isDefaultNamespace($nsuri)){
|
|
$nsuri = '';
|
|
}
|
|
}elseif($this->namespaceURI == $nsuri){
|
|
$nsuri = '';
|
|
}
|
|
}
|
|
|
|
if(!is_null($value)){
|
|
if($value === false){
|
|
// delete if false was given
|
|
if($nsuri){
|
|
$this->removeAttributeNS($nsuri,$attr);
|
|
}else{
|
|
$this->removeAttribute($attr);
|
|
}
|
|
}else{
|
|
// modify if value was given
|
|
if($nsuri){
|
|
$this->setAttributeNS($nsuri,$attr,$value);
|
|
}else{
|
|
$this->setAttribute($attr,$value);
|
|
}
|
|
}
|
|
}else{
|
|
// return value if none was given
|
|
if($nsuri){
|
|
return $this->getAttributeNS($nsuri,$attr);
|
|
}else{
|
|
return $this->getAttribute($attr);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Remove this node from the DOM
|
|
*/
|
|
public function delete(){
|
|
$this->parentNode->removeChild($this);
|
|
}
|
|
|
|
}
|
|
|
|
|