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<?php |
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/** |
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* This file is part of slick/configuration |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Slick\Configuration\Common; |
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use Traversable; |
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/** |
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* PriorityList |
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* |
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* @package Slick\Configuration\Common |
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*/ |
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class PriorityList implements \ArrayAccess, \Countable, \IteratorAggregate |
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{ |
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/** |
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* @var array |
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*/ |
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private $data = []; |
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/** |
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* @var int |
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*/ |
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private $lastPriority = 0; |
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/** |
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* Inserts the provided element in the right order given the priority |
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* |
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* The lowest priority will be the first element in the list. If no priority |
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* if given, the |
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* |
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* @param mixed $element |
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* @param int $priority |
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* |
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* @return PriorityList |
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*/ |
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public function insert($element, $priority = 0) |
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{ |
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$data = []; |
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$inserted = false; |
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$priority = $priority === 0 ? $this->lastPriority : $priority; |
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foreach ($this->data as $datum) { |
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$inserted = $this->tryToInsert($element, $priority, $data, $datum); |
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$data[] = ['element' => $datum['element'], 'priority' => $datum['priority']]; |
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$this->lastPriority = $datum['priority']; |
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} |
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if (!$inserted) { |
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$data[] = ['element' => $element, 'priority' => $priority]; |
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$this->lastPriority = $priority; |
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} |
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$this->data = $data; |
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return $this; |
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} |
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/** |
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* Tries to insert the provided element in the passed data array |
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* |
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* @param mixed $element |
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* @param integer $priority |
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* @param array $data |
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* @param array $datum |
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* |
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* @return bool |
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*/ |
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private function tryToInsert($element, $priority, &$data, $datum) |
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{ |
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$inserted = false; |
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if ($datum['priority'] > $priority) { |
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$data[] = ['element' => $element, 'priority' => $priority]; |
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$inserted = true; |
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} |
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return $inserted; |
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} |
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/** |
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* Returns the inserted elements in the order given by priority as an array |
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* |
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* @return array |
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*/ |
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public function asArray() |
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{ |
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$data = []; |
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foreach ($this->data as $datum) { |
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$data[] = $datum['element']; |
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} |
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return $data; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function offsetExists($offset) |
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{ |
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return isset($this->data[$offset]); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function offsetGet($offset) |
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{ |
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return $this->data[$offset]; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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$this->data[$offset] = $value; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function offsetUnset($offset) |
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{ |
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unset($this->data[$offset]); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function count() |
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{ |
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return count($this->data); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getIterator() |
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{ |
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return new \ArrayIterator($this->asArray()); |
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} |
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} |
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slickframework /
configuration
