voku\helper\SimpleHtmlDom

Complexity

Total Complexity

93

Size/Duplication

Total Lines	686
Duplicated Lines	5.54 %

Coupling/Cohesion

Components	2
Dependencies	3

Test Coverage

Coverage

93.24%

Importance

Changes

0

35 Methods

Rating	Name	Duplication	Size	Complexity
A	getAllAttributes()	0	13	3
A	__construct()	0	4	1
A	__call()	10	10	2
C	__get()	0	22	9
A	__invoke()	0	4	1
B	__isset()	0	17	8
B	__set()	0	15	5
A	__toString()	0	4	1
A	__unset()	0	4	1
A	childNodes()	0	14	3
A	find()	0	4	1
A	firstChild()	0	10	2
A	getAttribute()	0	6	1
A	getElementById()	0	4	1
A	getElementByTagName()	0	10	2
A	getElementsById()	0	4	1
B	getElementsByTagName()	28	28	5
A	getHtmlDomParser()	0	4	1
A	getIterator()	0	11	3
A	getNode()	0	4	1
A	hasAttribute()	0	4	1
A	html()	0	4	1
A	innerHtml()	0	4	1
A	lastChild()	0	10	2
A	nextSibling()	0	10	2
A	parentNode()	0	4	1
A	previousSibling()	0	10	2
B	replaceChild()	0	25	6
A	replaceNode()	0	23	3
B	normalizeStringForComparision()	0	35	3
D	cleanHtmlWrapper()	0	43	9
A	changeElementName()	0	17	3
B	setAttribute()	0	14	5
A	removeAttribute()	0	6	1
A	text()	0	4	1

<?php

declare(strict_types=1);

namespace voku\helper;

use BadMethodCallException;
use DOMElement;
use DOMNode;
use RuntimeException;

/**
 * Class SimpleHtmlDom
 *
 * @package voku\helper
 *
 * @property string      outerText <p>Get dom node's outer html (alias for "outerHtml").</p>
 * @property string      outerHtml <p>Get dom node's outer html.</p>
 * @property string      innerText <p>Get dom node's inner html (alias for "innerHtml").</p>
 * @property string      innerHtml <p>Get dom node's inner html.</p>
 * @property-read string plaintext <p>Get dom node's plain text.</p>
 * @property-read string tag       <p>Get dom node name.</p>
 * @property-read string attr      <p>Get dom node attributes.</p>
 *
 * @method SimpleHtmlDomNode|SimpleHtmlDom|null children() children($idx = -1) <p>Returns children of node.</p>
 * @method SimpleHtmlDom|null first_child() <p>Returns the first child of node.</p>
 * @method SimpleHtmlDom|null last_child() <p>Returns the last child of node.</p>
 * @method SimpleHtmlDom|null next_sibling() <p>Returns the next sibling of node.</p>
 * @method SimpleHtmlDom|null prev_sibling() <p>Returns the previous sibling of node.</p>
 * @method SimpleHtmlDom|null parent() <p>Returns the parent of node.</p>
 *
 * @method string outerText() <p>Get dom node's outer html (alias for "outerHtml()").</p>
 * @method string outerHtml() <p>Get dom node's outer html.</p>
 * @method string innerText() <p>Get dom node's inner html (alias for "innerHtml()").</p>
 *
 */
class SimpleHtmlDom implements \IteratorAggregate
{
  /**
   * @var array
   */
  protected static $functionAliases = array(
      'children'     => 'childNodes',
      'first_child'  => 'firstChild',
      'last_child'   => 'lastChild',
      'next_sibling' => 'nextSibling',
      'prev_sibling' => 'previousSibling',
      'parent'       => 'parentNode',
      'outertext'    => 'html',
      'outerhtml'    => 'html',
      'innertext'    => 'innerHtml',
      'innerhtml'    => 'innerHtml',
  );

  /**
   * @var DOMElement
   */
  protected $node;

  /**
   * SimpleHtmlDom constructor.
   *
   * @param DOMNode $node
   */
  public function __construct(DOMNode $node)
  {
    $this->node = $node;

$node is of type object<DOMNode>, but the property $node was declared to be of type object<DOMElement>. Are you sure that you always receive this specific sub-class here, or does it make sense to add an instanceof check?

  }

  /**
   * @param string $name
   * @param array $arguments
   *
   * @return null|string|SimpleHtmlDom
   *
   * @throws \BadMethodCallException
   */
  public function __call($name, $arguments)

This method seems to be duplicated in your project.

  {
    $name = \strtolower($name);

    if (isset(self::$functionAliases[$name])) {
      return \call_user_func_array(array($this, self::$functionAliases[$name]), $arguments);
    }

    throw new BadMethodCallException('Method does not exist');
  }

  /**
   * @param string $name
   *
   * @return array|null|string
   */
  public function __get($name)
  {
    $name = \strtolower($name);

    switch ($name) {
      case 'outerhtml':
      case 'outertext':
        return $this->html();
      case 'innerhtml':
      case 'innertext':
        return $this->innerHtml();
      case 'text':
      case 'plaintext':
        return $this->text();
      case 'tag':
        return $this->node->nodeName;
      case 'attr':
        return $this->getAllAttributes();
      default:
        return $this->getAttribute($name);
    }
  }

  /**
   * @param string $selector
   * @param int    $idx
   *
   * @return SimpleHtmlDom[]|SimpleHtmlDom|SimpleHtmlDomNodeInterface
   */
  public function __invoke($selector, $idx = null)
  {
    return $this->find($selector, $idx);
  }

  /**
   * @param $name
   *
   * @return bool
   */
  public function __isset($name)
  {
    $name = strtolower($name);

    switch ($name) {
      case 'outertext':
      case 'outerhtml':
      case 'innertext':
      case 'innerhtml':
      case 'plaintext':
      case 'text':
      case 'tag':
        return true;
      default:
        return $this->hasAttribute($name);
    }
  }

  /**
   * @param $name
   * @param $value
   *
   * @return SimpleHtmlDom
   */
  public function __set($name, $value)
  {
    $name = strtolower($name);

    switch ($name) {
      case 'outerhtml':
      case 'outertext':
        return $this->replaceNode($value);
      case 'innertext':
      case 'innerhtml':
        return $this->replaceChild($value);
      default:
        return $this->setAttribute($name, $value);
    }
  }

  /**
   * @return string
   */
  public function __toString()
  {
    return $this->html();
  }

  /**
   * @param $name
   *
   * @return SimpleHtmlDom
   */
  public function __unset($name)
  {
    return $this->removeAttribute($name);
  }

  /**
   * Returns children of node.
   *
   * @param int $idx
   *
   * @return SimpleHtmlDomNode|SimpleHtmlDom|null
   */
  public function childNodes(int $idx = -1)
  {
    $nodeList = $this->getIterator();

    if ($idx === -1) {
      return $nodeList;
    }

    if (isset($nodeList[$idx])) {
      return $nodeList[$idx];
    }

    return null;
  }

  /**
   * Find list of nodes with a CSS selector.
   *
   * @param string   $selector
   * @param int|null $idx
   *
   * @return SimpleHtmlDom[]|SimpleHtmlDom|SimpleHtmlDomNodeInterface
   */
  public function find(string $selector, $idx = null)
  {
    return $this->getHtmlDomParser()->find($selector, $idx);
  }

  /**
   * Returns the first child of node.
   *
   * @return SimpleHtmlDom|null
   */
  public function firstChild()
  {
    $node = $this->node->firstChild;

    if ($node === null) {
      return null;
    }

    return new self($node);
  }

  /**
   * Returns an array of attributes.
   *
   * @return array|null
   */
  public function getAllAttributes()
  {
    if ($this->node->hasAttributes()) {
      $attributes = array();
      foreach ($this->node->attributes as $attr) {
        $attributes[$attr->name] = HtmlDomParser::putReplacedBackToPreserveHtmlEntities($attr->value);
      }

      return $attributes;
    }

    return null;
  }

  /**
   * Return attribute value.
   *
   * @param string $name
   *
   * @return string
   */
  public function getAttribute(string $name): string
  {
    $html = $this->node->getAttribute($name);

    return HtmlDomParser::putReplacedBackToPreserveHtmlEntities($html);
  }

  /**
   * Return element by #id.
   *
   * @param string $id
   *
   * @return SimpleHtmlDom|SimpleHtmlDomNodeBlank
   */
  public function getElementById(string $id)
  {
    return $this->find("#$id", 0);
  }

  /**
   * Return element by tag name.
   *
   * @param string $name
   *
   * @return SimpleHtmlDom|SimpleHtmlDomNodeBlank
   */
  public function getElementByTagName(string $name)
  {
    $node = $this->node->getElementsByTagName($name)->item(0);

    if ($node === null) {
      return new SimpleHtmlDomNodeBlank();
    }

    return new self($node);
  }

  /**
   * Returns elements by #id.
   *
   * @param string   $id
   * @param null|int $idx
   *
   * @return SimpleHtmlDom[]|SimpleHtmlDom|SimpleHtmlDomNodeBlank
   */
  public function getElementsById(string $id, $idx = null)
  {
    return $this->find("#$id", $idx);
  }

  /**
   * Returns elements by tag name.
   *
   * @param string   $name
   * @param null|int $idx
   *
   * @return SimpleHtmlDomNode|SimpleHtmlDomNode[]|SimpleHtmlDomNodeBlank
   */
  public function getElementsByTagName(string $name, $idx = null)

This method seems to be duplicated in your project.

  {
    $nodesList = $this->node->getElementsByTagName($name);

    $elements = new SimpleHtmlDomNode();

    foreach ($nodesList as $node) {
      $elements[] = new self($node);
    }

    // return all elements
    if (null === $idx) {
      return $elements;
    }

    // handle negative values
    if ($idx < 0) {
      $idx = \count($elements) + $idx;
    }

    // return one element
    if (isset($elements[$idx])) {
      return $elements[$idx];
    }

    // return a blank-element
    return new SimpleHtmlDomNodeBlank();
  }

  /**
   * Create a new "HtmlDomParser"-object from the current context.
   *
   * @return HtmlDomParser
   */
  public function getHtmlDomParser(): HtmlDomParser
  {
    return new HtmlDomParser($this);
  }

  /**
   * Retrieve an external iterator.
   *
   * @link  http://php.net/manual/en/iteratoraggregate.getiterator.php
   * @return SimpleHtmlDomNode An instance of an object implementing <b>Iterator</b> or
   * <b>Traversable</b>
   */
  public function getIterator(): SimpleHtmlDomNode
  {
    $elements = new SimpleHtmlDomNode();
    if ($this->node->hasChildNodes()) {
      foreach ($this->node->childNodes as $node) {
        $elements[] = new self($node);
      }
    }

    return $elements;
  }

  /**
   * @return DOMNode
   */
  public function getNode(): \DOMNode
  {
    return $this->node;
  }

  /**
   * Determine if an attribute exists on the element.
   *
   * @param string $name
   *
   * @return bool
   */
  public function hasAttribute(string $name): bool
  {
    return $this->node->hasAttribute($name);
  }

  /**
   * Get dom node's outer html.
   *
   * @param bool $multiDecodeNewHtmlEntity
   *
   * @return string
   */
  public function html(bool $multiDecodeNewHtmlEntity = false): string
  {
    return $this->getHtmlDomParser()->html($multiDecodeNewHtmlEntity);
  }

  /**
   * Get dom node's inner html.
   *
   * @param bool $multiDecodeNewHtmlEntity
   *
   * @return string
   */
  public function innerHtml(bool $multiDecodeNewHtmlEntity = false): string
  {
    return $this->getHtmlDomParser()->innerHtml($multiDecodeNewHtmlEntity);
  }

  /**
   * Returns the last child of node.
   *
   * @return SimpleHtmlDom|null
   */
  public function lastChild()
  {
    $node = $this->node->lastChild;

    if ($node === null) {
      return null;
    }

    return new self($node);
  }

  /**
   * Returns the next sibling of node.
   *
   * @return SimpleHtmlDom|null
   */
  public function nextSibling()
  {
    $node = $this->node->nextSibling;

    if ($node === null) {
      return null;
    }

    return new self($node);
  }

  /**
   * Returns the parent of node.
   *
   * @return SimpleHtmlDom
   */
  public function parentNode(): self
  {
    return new self($this->node->parentNode);
  }

  /**
   * Returns the previous sibling of node.
   *
   * @return SimpleHtmlDom|null
   */
  public function previousSibling()
  {
    $node = $this->node->previousSibling;

    if ($node === null) {
      return null;
    }

    return new self($node);
  }

  /**
   * Replace child node.
   *
   * @param string $string
   *
   * @return $this
   *
   * @throws \RuntimeException
   */
  protected function replaceChild(string $string)
  {
    if (!empty($string)) {
      $newDocument = new HtmlDomParser($string);

      if ($this->normalizeStringForComparision($newDocument) != $this->normalizeStringForComparision($string)) {
        throw new RuntimeException('Not valid HTML fragment');
      }
    }

    /** @noinspection PhpParamsInspection */
    if (\count($this->node->childNodes) > 0) {
      foreach ($this->node->childNodes as $node) {
        $this->node->removeChild($node);
      }
    }

    if (!empty($newDocument)) {
      $newDocument = $this->cleanHtmlWrapper($newDocument);
      $newNode = $this->node->ownerDocument->importNode($newDocument->getDocument()->documentElement, true);
      $this->node->appendChild($newNode);
    }

    return $this;
  }

  /**
   * Replace this node.
   *
   * @param string $string
   *
   * @return $this|null
   *
   * @throws \RuntimeException
   */
  protected function replaceNode(string $string)
  {
    if (empty($string)) {
      $this->node->parentNode->removeChild($this->node);

      return null;
    }

    $newDocument = new HtmlDomParser($string);

    if ($this->normalizeStringForComparision($newDocument->outerText()) != $this->normalizeStringForComparision($string)) {
      throw new RuntimeException('Not valid HTML fragment');
    }

    $newDocument = $this->cleanHtmlWrapper($newDocument);

    $newNode = $this->node->ownerDocument->importNode($newDocument->getDocument()->documentElement, true);

    $this->node->parentNode->replaceChild($newNode, $this->node);
    $this->node = $newNode;

    return $this;
  }

  /**
   * Normalize the given input for comparision.
   *
   * @param HtmlDomParser|string $input
   *
   * @return string
   */
  private function normalizeStringForComparision($input): string
  {
    if ($input instanceof HtmlDomParser) {
      $string = $input->outerText();

      if ($input->getIsDOMDocumentCreatedWithoutHeadWrapper() === true) {
        $string = str_replace(array('<head>', '</head>'), '', $string);
      }
    } else {
      $string = (string)$input;
    }

    return
        urlencode(
            urldecode(
                trim(
                    str_replace(
                        array(
                            ' ',
                            "\n",
                            "\r",
                            '/>',
                        ),
                        array(
                            '',
                            '',
                            '',
                            '>',
                        ),
                        strtolower($string)
                    )
                )
            )
        );
  }

  /**
   * @param HtmlDomParser $newDocument
   *
   * @return HtmlDomParser
   */
  protected function cleanHtmlWrapper(HtmlDomParser $newDocument): HtmlDomParser
  {
    if (
        $newDocument->getIsDOMDocumentCreatedWithoutHtml() === true
        ||
        $newDocument->getIsDOMDocumentCreatedWithoutHtmlWrapper() === true
    ) {

      // Remove doc-type node.
      if ($newDocument->getDocument()->doctype !== null) {
        $newDocument->getDocument()->doctype->parentNode->removeChild($newDocument->getDocument()->doctype);
      }

      // Remove html element, preserving child nodes.
      $html = $newDocument->getDocument()->getElementsByTagName('html')->item(0);
      $fragment = $newDocument->getDocument()->createDocumentFragment();
      if ($html !== null) {
        while ($html->childNodes->length > 0) {
          $fragment->appendChild($html->childNodes->item(0));
        }
        $html->parentNode->replaceChild($fragment, $html);
      }

      // Remove body element, preserving child nodes.
      $body = $newDocument->getDocument()->getElementsByTagName('body')->item(0);
      $fragment = $newDocument->getDocument()->createDocumentFragment();
      if ($body instanceof \DOMElement) {
        while ($body->childNodes->length > 0) {
          $fragment->appendChild($body->childNodes->item(0));
        }
        $body->parentNode->replaceChild($fragment, $body);

        // At this point DOMDocument still added a "<p>"-wrapper around our string,
        // so we replace it with "<simpleHtmlDomP>" and delete this at the ending ...
        $item = $newDocument->getDocument()->getElementsByTagName('p')->item(0);
        if ($item !== null) {
          $this->changeElementName($item, 'simpleHtmlDomP');
        }
      }
    }

    return $newDocument;
  }

  /**
   * Change the name of a tag in a "DOMNode".
   *
   * @param DOMNode $node
   * @param string  $name
   *
   * @return DOMElement
   */
  protected function changeElementName(\DOMNode $node, string $name): \DOMElement
  {
    $newnode = $node->ownerDocument->createElement($name);

    foreach ($node->childNodes as $child) {
      $child = $node->ownerDocument->importNode($child, true);
      $newnode->appendChild($child);
    }

    foreach ($node->attributes as $attrName => $attrNode) {
      $newnode->setAttribute($attrName, $attrNode);
    }

    $newnode->ownerDocument->replaceChild($newnode, $node);

    return $newnode;
  }

  /**
   * Set attribute value.
   *
   * @param string      $name       <p>The name of the html-attribute.</p>
   * @param string|null $value      <p>Set to NULL or empty string, to remove the attribute.</p>
   * @param bool $strict            </p>
   *                                $value must be NULL, to remove the attribute,
   *                                so that you can set an empty string as attribute-value e.g. autofocus=""
   *                                </p>
   *
   * @return $this
   */
  public function setAttribute(string $name, $value = null, bool $strict = false)
  {
    if (
        ($strict === true && null === $value)
        ||
        ($strict === false && empty($value))
    ) {
      $this->node->removeAttribute($name);
    } else {
      $this->node->setAttribute($name, $value);
    }

    return $this;
  }

  /**
   * Remove attribute.
   *
   * @param string $name <p>The name of the html-attribute.</p>
   *
   * @return mixed
   */
  public function removeAttribute(string $name)
  {
    $this->node->removeAttribute($name);

    return $this;
  }

  /**
   * Get dom node's plain text.
   *
   * @return string
   */
  public function text(): string
  {
    return $this->node->textContent;
  }
}