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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; under version 2 |
| 7 | * of the License (non-upgradable). |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * |
| 18 | * Copyright (c) 2008-2010 (original work) Deutsche Institut für Internationale Pädagogische Forschung |
| 19 | * (under the project TAO-TRANSFER); |
| 20 | * 2009-2012 (update and modification) Public Research Centre Henri Tudor |
| 21 | * (under the project TAO-SUSTAIN & TAO-DEV); |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | /** |
| 26 | * An implementation of TranslationFileReader aiming at reading RDF Translation |
| 27 | * |
| 28 | * @access public |
| 29 | * @author Jerome Bogaerts, <jerome.bogaerts@tudor.lu> |
| 30 | * @package tao |
| 31 | |
| 32 | */ |
| 33 | class tao_helpers_translation_RDFFileReader extends tao_helpers_translation_TranslationFileReader |
| 34 | { |
| 35 | // --- ASSOCIATIONS --- |
| 36 | |
| 37 | |
| 38 | // --- ATTRIBUTES --- |
| 39 | |
| 40 | // --- OPERATIONS --- |
| 41 | |
| 42 | /** |
| 43 | * Short description of method read |
| 44 | * |
| 45 | * @access public |
| 46 | * @author Jerome Bogaerts, <jerome.bogaerts@tudor.lu> |
| 47 | * @return mixed |
| 48 | */ |
| 49 | public function read() |
| 50 | { |
| 51 | |
| 52 | $translationUnits = []; |
| 53 | |
| 54 | try { |
| 55 | $translationFile = $this->getTranslationFile(); |
| 56 | } catch (tao_helpers_translation_TranslationException $e) { |
| 57 | $translationFile = new tao_helpers_translation_RDFTranslationFile(); |
| 58 | } |
| 59 | |
| 60 | $this->setTranslationFile($translationFile); |
| 61 | $inputFile = $this->getFilePath(); |
| 62 | |
| 63 | if (file_exists($inputFile)) { |
| 64 | if (is_file($inputFile)) { |
| 65 | if (is_readable($inputFile)) { |
| 66 | try { |
| 67 | $doc = new DOMDocument('1.0', 'UTF-8'); |
| 68 | $doc->load($inputFile); |
| 69 | $xpath = new DOMXPath($doc); |
| 70 | $rdfNS = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'; |
| 71 | $xmlNS = 'http://www.w3.org/XML/1998/namespace'; |
| 72 | $xpath->registerNamespace('rdf', $rdfNS); |
| 73 | |
| 74 | $rootNodes = $xpath->query('//rdf:RDF'); |
| 75 | if ($rootNodes->length == 1) { |
| 76 | // Try to get annotations from the root node. |
| 77 | $sibling = $rootNodes->item(0)->previousSibling; |
| 78 | while ($sibling !== null) { |
| 79 | if ($sibling instanceof DOMNode && $sibling->nodeType == XML_COMMENT_NODE) { |
| 80 | $annotations = tao_helpers_translation_RDFUtils::unserializeAnnotations( |
| 81 | $sibling->data |
| 82 | ); |
| 83 | $translationFile->setAnnotations($annotations); |
| 84 | |
| 85 | if (isset($annotations['sourceLanguage'])) { |
| 86 | $translationFile->setSourceLanguage($annotations['sourceLanguage']); |
| 87 | } |
| 88 | |
| 89 | if (isset($annotations['targetLanguage'])) { |
| 90 | $translationFile->setTargetLanguage($annotations['targetLanguage']); |
| 91 | } |
| 92 | |
| 93 | break; |
| 94 | } |
| 95 | |
| 96 | $sibling = $sibling->previousSibling; |
| 97 | } |
| 98 | |
| 99 | $descriptions = $xpath->query('//rdf:Description'); |
| 100 | foreach ($descriptions as $description) { |
| 101 | if ($description->hasAttributeNS($rdfNS, 'about')) { |
| 102 | $subject = $description->getAttributeNS($rdfNS, 'about'); |
| 103 | |
| 104 | // Let's retrieve properties. |
| 105 | foreach ($description->childNodes as $property) { |
| 106 | if ($property->nodeType == XML_ELEMENT_NODE) { |
| 107 | // Retrieve namespace uri of this node. |
| 108 | if ($property->namespaceURI != null) { |
| 109 | $predicate = $property->namespaceURI . $property->localName; |
| 110 | |
| 111 | // Retrieve an hypothetic target language. |
| 112 | $lang = tao_helpers_translation_Utils::getDefaultLanguage(); |
| 113 | if ($property->hasAttributeNS($xmlNS, 'lang')) { |
| 114 | $lang = $property->getAttributeNS($xmlNS, 'lang'); |
| 115 | } |
| 116 | |
| 117 | $object = $property->nodeValue; |
| 118 | |
| 119 | $tu = new tao_helpers_translation_RDFTranslationUnit(''); |
| 120 | $tu->setTargetLanguage($lang); |
| 121 | $tu->setTarget($object); |
| 122 | $tu->setSubject($subject); |
| 123 | $tu->setPredicate($predicate); |
| 124 | |
| 125 | // Try to get annotations. |
| 126 | $sibling = $property->previousSibling; |
| 127 | while ($sibling !== null) { |
| 128 | if ( |
| 129 | $sibling instanceof DOMNode |
| 130 | && $sibling->nodeType == XML_COMMENT_NODE |
| 131 | ) { |
| 132 | // We should have the annotations we are looking for. |
| 133 | $annotations = |
| 134 | tao_helpers_translation_RDFUtils::unserializeAnnotations( |
| 135 | $sibling->data |
| 136 | ); |
| 137 | $tu->setAnnotations($annotations); |
| 138 | |
| 139 | // Set the found sources and sourcelanguages if found. |
| 140 | if (isset($annotations['source'])) { |
| 141 | $tu->setSource($annotations['source']); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | $sibling = $sibling->previousSibling; |
| 146 | } |
| 147 | |
| 148 | $translationUnits[] = $tu; |
| 149 | } |
| 150 | } |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | $this->getTranslationFile()->addTranslationUnits($translationUnits); |
| 156 | } else { |
| 157 | throw new tao_helpers_translation_TranslationException( |
| 158 | "'${inputFile}' has no rdf:RDF root node or more than one rdf:RDF root node." |
| 159 | ); |
| 160 | } |
| 161 | } catch (DOMException $e) { |
| 162 | throw new tao_helpers_translation_TranslationException("'${inputFile}' cannot be parsed."); |
| 163 | } |
| 164 | } else { |
| 165 | throw new tao_helpers_translation_TranslationException( |
| 166 | "'${inputFile}' cannot be read. Check your system permissions." |
| 167 | ); |
| 168 | } |
| 169 | } else { |
| 170 | throw new tao_helpers_translation_TranslationException("'${inputFile}' is not a file."); |
| 171 | } |
| 172 | } else { |
| 173 | throw new tao_helpers_translation_TranslationException("The file '${inputFile}' does not exist."); |
| 174 | } |
| 175 | } |
| 176 | } |