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<?php |
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/** |
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* Created by PhpStorm. |
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* User: sergio.rodenas |
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* Date: 12/5/18 |
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* Time: 0:09 |
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*/ |
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namespace Rodenastyle\StreamParser\Parsers; |
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use Rodenastyle\StreamParser\Exceptions\IncompleteParseException; |
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use Rodenastyle\StreamParser\StreamParserInterface; |
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use Tightenco\Collect\Support\Collection; |
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use XMLReader; |
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class XMLParser implements StreamParserInterface |
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{ |
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protected $reader,$source; |
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protected $skipFirstElement = true; |
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public function from(String $source): StreamParserInterface |
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{ |
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$this->source = $source; |
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return $this; |
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} |
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public function withoutSkippingFirstElement(){ |
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$this->skipFirstElement = false; |
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return $this; |
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} |
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public function each(callable $function) |
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{ |
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$this->start(); |
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while($this->reader->read()){ |
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$this->searchElement($function); |
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} |
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$this->stop(); |
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} |
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private function searchElement(callable $function) |
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{ |
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if($this->isElement() && ! $this->shouldBeSkipped()){ |
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$function($this->extractElement($this->reader->name)); |
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} |
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} |
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private function extractElement(String $elementName, $couldBeAnElementsList = false) |
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{ |
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$elementCollection = (new Collection())->merge($this->getCurrentElementAttributes()); |
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if($this->isEmptyElement($elementName)) { |
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return $elementCollection; |
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} |
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while($this->reader->read()) { |
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if($this->isEndElement($elementName)) { |
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break; |
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} |
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if($this->isValue()) { |
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if($elementCollection->isEmpty()) { |
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return trim($this->reader->value); |
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} else { |
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return $elementCollection->put($elementName, trim($this->reader->value)); |
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} |
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} |
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if($this->isElement()) { |
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if($couldBeAnElementsList) { |
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$foundElementName = $this->reader->name; |
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$elementCollection->push(new Collection($this->extractElement($foundElementName))); |
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} else { |
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$foundElementName = $this->reader->name; |
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$elementCollection->put($foundElementName, $this->extractElement($foundElementName, true)); |
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} |
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} |
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} |
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return $elementCollection; |
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} |
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private function getCurrentElementAttributes(){ |
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$attributes = new Collection(); |
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if($this->reader->hasAttributes) { |
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while($this->reader->moveToNextAttribute()) { |
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$attributes->put($this->reader->name, $this->reader->value); |
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} |
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} |
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return $attributes; |
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} |
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private function start() |
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{ |
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$this->reader = new XMLReader(); |
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$this->reader->open($this->source); |
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return $this; |
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} |
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private function stop() |
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{ |
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if( ! $this->reader->close()){ |
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throw new IncompleteParseException(); |
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} |
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} |
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private function shouldBeSkipped(){ |
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if($this->skipFirstElement){ |
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$this->skipFirstElement = false; |
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return true; |
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} |
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return false; |
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} |
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private function isElement(String $elementName = null){ |
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if($elementName){ |
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return $this->reader->nodeType == XMLReader::ELEMENT && $this->reader->name === $elementName; |
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} else { |
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return $this->reader->nodeType == XMLReader::ELEMENT; |
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} |
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} |
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private function isEndElement(String $elementName = null){ |
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if($elementName){ |
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return $this->reader->nodeType == XMLReader::END_ELEMENT && $this->reader->name === $elementName; |
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} else { |
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return $this->reader->nodeType == XMLReader::END_ELEMENT; |
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} |
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} |
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private function isValue(){ |
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return $this->reader->nodeType == XMLReader::TEXT || $this->reader->nodeType === XMLReader::CDATA; |
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} |
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private function isEmptyElement(String $elementName = null){ |
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if($elementName) { |
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return $this->reader->isEmptyElement && $this->reader->name === $elementName; |
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} else { |
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return false; |
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} |
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} |
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} |
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Rodenastyle /
stream-parser
