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<?php |
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namespace vipnytt\OPMLParser; |
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use SimpleXMLElement; |
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class Render implements OPMLInterface |
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{ |
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/** |
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* Version to use for the build |
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* 2.0 - `text` attribute is required |
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* 1.0 - for legacy support |
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* @var string |
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*/ |
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protected $version; |
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/** |
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* Rendered XML object |
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* @var SimpleXMLElement |
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*/ |
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protected $object; |
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/** |
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* Constructor |
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* |
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* @param array $array is the array we want to render and must follow structure defined above |
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* @param string $encoding character encoding to use |
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* @param string $version '2.0' if `text` attribute is required, '1.0' for legacy |
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* @throws Exceptions\RenderException |
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*/ |
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public function __construct($array, $encoding = self::ENCODING, $version = self::VERSION_DEFAULT) |
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{ |
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$this->version = $version; |
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if (!in_array($this->version, self::SUPPORTED_VERSIONS)) { |
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throw new Exceptions\RenderException('OPML version `' . $this->version . '` not supported'); |
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} |
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$opml = new SimpleXMLElement('<?xml version="1.0" encoding="' . $encoding . '"?><opml></opml>'); |
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$opml->addAttribute('version', (string)$this->version); |
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// Create head element. It is optional but head element will exist in the final XML object. |
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$head = $opml->addChild('head'); |
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if (isset($array['head'])) { |
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foreach ($array['head'] as $key => $value) { |
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if (in_array($key, self::OPTIONAL_HEAD_ELEMENTS, true)) { |
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$head->addChild($key, $value); |
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} |
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} |
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} |
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// Check body is set and contains at least one element |
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if (!isset($array['body'])) { |
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throw new Exceptions\RenderException('The body element is missing'); |
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} |
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// Create outline elements |
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$body = $opml->addChild('body'); |
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foreach ($array['body'] as $outline) { |
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$this->renderOutline($body, $outline); |
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} |
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$this->object = $opml; |
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} |
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/** |
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* Create a XML outline object in a parent object. |
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* |
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* @param SimpleXMLElement $parent is the parent object of current outline |
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* @param array $outline array representing an outline object |
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* @return void |
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* @throws Exceptions\RenderException |
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*/ |
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protected function renderOutline($parent, $outline) |
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{ |
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$outlineSub = $parent->addChild('outline'); |
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$textIsPresent = false; |
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foreach ($outline as $key => $value) { |
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// Only outlines can be an array and so we consider children are also outline elements. |
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if ($key === '@outlines' && is_array($value)) { |
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foreach ($value as $outlineChild) { |
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$this->renderOutline($outlineSub, $outlineChild); |
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} |
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} elseif (is_array($value)) { |
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throw new Exceptions\RenderException('Type of outline elements cannot be array: ' . $key); |
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} else { |
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// Detect text attribute is present, that's good :) |
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if ($key === 'text') { |
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$textIsPresent = true; |
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} |
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$outlineSub->addAttribute($key, $value); |
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} |
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} |
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if (!$textIsPresent && $this->version == '2.0') { |
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throw new Exceptions\RenderException('The text element must be present for all outlines (applies to version 2.0 only)'); |
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} |
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} |
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/** |
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* Return as a XML object |
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* |
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* @return SimpleXMLElement |
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*/ |
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public function asXMLObject() |
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{ |
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return $this->object; |
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} |
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} |
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VIPnytt /
OPMLParser
