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<?php |
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namespace JeroenDesloovere\XmpMetadataExtractor; |
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use DOMDocument; |
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use JeroenDesloovere\XmpMetadataExtractor\Exception\FileNotFoundException; |
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use SplFileInfo; |
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final class XmpMetadataExtractor |
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{ |
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private const DEFAULT_NAMESPACE = 'x'; |
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protected const RDF_ALT = 'rdf:Alt'; |
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protected const RDF_BAG = 'rdf:Bag'; |
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protected const RDF_LI = 'rdf:li'; |
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protected const RDF_SEQ = 'rdf:Seq'; |
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protected const POSSIBLE_CONTAINERS = [ |
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self::RDF_ALT, |
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self::RDF_BAG, |
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self::RDF_SEQ, |
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]; |
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/** |
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* @var string |
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*/ |
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private $namespace; |
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public function __construct(string $namespace = self::DEFAULT_NAMESPACE) |
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{ |
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$this->namespace = $namespace; |
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} |
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private function convertDomNode($node) |
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{ |
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switch ($node->nodeType) { |
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case XML_CDATA_SECTION_NODE: |
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case XML_TEXT_NODE: |
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return trim($node->textContent); |
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break; |
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case XML_ELEMENT_NODE: |
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return $this->convertXmlNode($node); |
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break; |
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} |
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} |
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private function convertXmlNode($node) |
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{ |
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$output = []; |
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for ($i = 0, $m = $node->childNodes->length; $i < $m; $i++) { |
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$child = $node->childNodes->item($i); |
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$v = $this->convertDomNode($child); |
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if (isset($child->tagName)) { |
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$t = $child->tagName; |
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if (!isset($output[$t])) { |
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$output[$t] = array(); |
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} |
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$output[$t][] = $v; |
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} elseif ($v || $v === '0') { |
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$output = (string)$v; |
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} |
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} |
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// Has attributes but isn't an array |
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if ($node->attributes->length && !is_array($output)) { |
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// Change output into an array. |
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$output = array('@content' => $output); |
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} |
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if (is_array($output)) { |
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if ($node->attributes->length) { |
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$a = array(); |
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foreach ($node->attributes as $attrName => $attrNode) { |
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$a[$attrName] = (string)$attrNode->value; |
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} |
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$output['@attributes'] = $a; |
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} |
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foreach ($output as $t => $v) { |
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// We are combining arrays for rdf:Bag, rdf:Alt, rdf:Seq |
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if (in_array($t, self::POSSIBLE_CONTAINERS)) { |
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if (!array_key_exists(self::RDF_LI, $v[0])) { |
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break; |
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} |
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$output = $v[0][self::RDF_LI]; |
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} elseif (is_array($v) && count($v) == 1 && $t != '@attributes') { |
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$output[$t] = $v[0]; |
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} |
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} |
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} |
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return $output; |
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} |
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public function extractFromContent(string $content): array |
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{ |
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try { |
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$doc = new DOMDocument(); |
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$doc->loadXML($this->getXmpXmlString($content)); |
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$root = $doc->documentElement; |
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$output = $this->convertDomNode($root); |
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$output['@root'] = $root->tagName; |
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return $output; |
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} catch (\Exception $e) { |
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return []; |
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} |
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} |
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public function extractFromFile(string $file): array |
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{ |
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try { |
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$file = new SplFileInfo($file); |
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$contents = file_get_contents($file->getPathname()); |
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} catch (\Exception $e) { |
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throw new FileNotFoundException('The given File could not be found.'); |
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} |
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return $this->extractFromContent($contents); |
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} |
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private function getXmpXmlString(string $content): string |
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{ |
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$xmpDataStart = strpos($content, '<' . $this->namespace . ':xmpmeta'); |
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$xmpDataEnd = strpos($content, '</' . $this->namespace . ':xmpmeta>'); |
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$xmpLength = $xmpDataEnd - $xmpDataStart; |
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return substr($content, $xmpDataStart, $xmpLength + strlen($this->namespace) + 11); |
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} |
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} |
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jeroendesloovere /
xmp-metadata-extractor
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The
breakstatement is not necessary if it is preceded for example by areturnstatement:If you would like to keep this construct to be consistent with other
casestatements, you can safely mark this issue as a false-positive.