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<?php |
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/** |
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* responsive-images-css |
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* |
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* @category Jkphl |
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* @package Jkphl\Respimgcss |
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* @subpackage Jkphl\Respimgcss\Domain |
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* @author Joschi Kuphal <[email protected]> / @jkphl |
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* @copyright Copyright © 2018 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 © 2018 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\Respimgcss\Domain\Model; |
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use Jkphl\Respimgcss\Domain\Contract\ImageCandidateInterface; |
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use Jkphl\Respimgcss\Domain\Contract\ImageCandidateSetInterface; |
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use Jkphl\Respimgcss\Domain\Exceptions\InvalidArgumentException; |
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/** |
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* Image candidate set |
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* |
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* @package Jkphl\Respimgcss |
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* @subpackage Jkphl\Respimgcss\Domain |
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*/ |
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class ImageCandidateSet implements ImageCandidateSetInterface |
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{ |
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/** |
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* Image candidates |
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* |
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* @var ImageCandidateInterface[] |
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*/ |
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protected $imageCandidates = []; |
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/** |
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* Internal pointer |
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* |
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* @var int |
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*/ |
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protected $pointer = 0; |
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/** |
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* Return the current image candidate |
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* |
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* @return ImageCandidateInterface Image candidate |
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*/ |
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public function current(): ImageCandidateInterface |
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{ |
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return $this->imageCandidates[$this->pointer]; |
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} |
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/** |
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* Move forward to next image candidate |
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* |
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* @return void |
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*/ |
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public function next(): void |
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{ |
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++$this->pointer; |
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} |
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/** |
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* Return the key of the current image candidate |
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* |
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* @return int Current key |
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*/ |
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public function key(): int |
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{ |
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return $this->pointer; |
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} |
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/** |
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* Checks if current position is valid |
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* |
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* @return boolean The return value will be casted to boolean and then evaluated. |
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*/ |
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public function valid(): bool |
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{ |
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return isset($this->imageCandidates[$this->pointer]); |
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} |
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/** |
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* Rewind the Iterator to the first element |
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* |
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* @return void |
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*/ |
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public function rewind(): void |
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{ |
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$this->pointer = 0; |
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} |
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/** |
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* Whether a offset exists |
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* |
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* @param int $offset Offset |
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* |
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* @return boolean Offset exists |
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*/ |
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public function offsetExists($offset): bool |
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{ |
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return isset($this->imageCandidates[intval($offset)]); |
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} |
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/** |
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* Offset to retrieve |
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* |
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* @param int $offset Offset |
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* |
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* @return ImageCandidateInterface Image candidate |
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*/ |
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public function offsetGet($offset): ImageCandidateInterface |
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{ |
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return $this->imageCandidates[intval($offset)]; |
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} |
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/** |
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* Offset to set |
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* |
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* @param int|null $offset Offset |
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* @param mixed $value |
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* |
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* @return void |
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* @throws InvalidArgumentException If the value given is not a valid image candidate |
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*/ |
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public function offsetSet($offset, $value): void |
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{ |
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if (!($value instanceof ImageCandidateInterface)) { |
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throw new InvalidArgumentException( |
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InvalidArgumentException::INVALID_IMAGE_CANDIDATE_STR, |
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InvalidArgumentException::INVALID_IMAGE_CANDIDATE |
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); |
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} |
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$this->imageCandidates[is_int($offset) ? $offset : count($this->imageCandidates)] = $value; |
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} |
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/** |
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* Offset to unset |
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* |
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* @param int $offset Offset |
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* |
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* @return void |
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*/ |
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public function offsetUnset($offset): void |
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{ |
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unset($this->imageCandidates[intval($offset)]); |
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$this->imageCandidates = array_values($this->imageCandidates); |
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} |
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/** |
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* Count elements of an object |
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* |
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* @return int Number of registered image candidates |
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*/ |
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public function count() |
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{ |
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return count($this->imageCandidates); |
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} |
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} |
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