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<?php |
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/** |
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* micrometa |
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* |
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* @category Jkphl |
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* @package Jkphl\Micrometa |
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* @subpackage Jkphl\Micrometa\Ports\Item |
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* @author Joschi Kuphal <[email protected]> / @jkphl |
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* @copyright Copyright © 2017 Joschi Kuphal <[email protected]> / @jkphl |
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* @license http://opensource.org/licenses/MIT The MIT License (MIT) |
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*/ |
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/*********************************************************************************** |
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* The MIT License (MIT) |
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* |
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* Copyright © 2017 Joschi Kuphal <[email protected]> / @jkphl |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy of |
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* this software and associated documentation files (the "Software"), to deal in |
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* the Software without restriction, including without limitation the rights to |
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of |
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* the Software, and to permit persons to whom the Software is furnished to do so, |
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* subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in all |
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* copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS |
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR |
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER |
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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***********************************************************************************/ |
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namespace Jkphl\Micrometa\Ports\Item; |
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use Jkphl\Micrometa\Infrastructure\Parser\LinkType; |
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use Jkphl\Micrometa\Ports\Exceptions\OutOfBoundsException; |
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/** |
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* Item object model |
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* |
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* @package Jkphl\Micrometa |
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* @subpackage Jkphl\Micrometa\Ports |
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*/ |
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class ItemObjectModel extends ItemList implements ItemObjectModelInterface |
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{ |
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/** |
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* LinkType item cache |
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* |
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* @var ItemListInterface |
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*/ |
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protected $links = null; |
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/** |
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* Return all link declarations of a particular type |
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* |
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* @param string|null $type Link type |
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* @param int|null $index Optional: particular index |
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* @return ItemInterface|ItemInterface[] Single LinkType item or list of LinkType items |
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* @api |
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*/ |
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public function link($type = null, $index = null) |
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{ |
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// One-time caching of link elements |
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if ($this->links === null) { |
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$this->cacheLinkTypeItems(); |
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} |
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// Find the matching LinkType items |
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$links = ($type === null) ? $this->links->getItems() : $this->links->getItems($type); |
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// Return link item(s) |
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return ($index === null) ? $links : $this->getLinkIndex($links, $type, $index); |
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} |
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/** |
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* Return a particular link item by index |
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* |
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* @param ItemInterface[] $links Link items |
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* @param string|null $type Link type |
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* @param int $index Link item index |
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* @return ItemInterface Link item |
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* @throws OutOfBoundsException If the link index is out of bounds |
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*/ |
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protected function getLinkIndex(array $links, $type, $index) |
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{ |
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// If the link index is out of bounds |
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if (!is_int($index) || !array_key_exists($index, $links)) { |
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throw new OutOfBoundsException( |
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sprintf(OutOfBoundsException::INVALID_LINK_TYPE_INDEX_STR, $index, $type), |
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OutOfBoundsException::INVALID_LINK_TYPE_INDEX |
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); |
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} |
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return $links[$index]; |
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} |
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/** |
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* One-time caching of LinkType items |
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*/ |
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protected function cacheLinkTypeItems() |
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{ |
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$links = []; |
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foreach ($this->items as $item) { |
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if ($item->getFormat() == LinkType::FORMAT) { |
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$links[] = $item; |
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} |
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} |
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$this->links = new ItemList($links); |
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} |
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} |
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jkphl /
micrometa
