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<?php |
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/* this file is part of pipelines */ |
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namespace Ktomk\Pipelines\Cli\Args; |
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use Iterator as PhpIterator; |
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class Iterator extends Args implements PhpIterator |
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{ |
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/** |
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* @var Args |
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*/ |
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private $args; |
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/** |
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* @var int |
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*/ |
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private $index; |
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/** |
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* @var array |
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*/ |
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private $indexes; |
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/** |
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* Iterator constructor. |
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* @param Args $args |
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*/ |
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public function __construct(Args $args) |
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{ |
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$this->args = $args; |
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$this->rewind(); |
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} |
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/** |
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* get next argument (look ahead) |
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* |
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* @return null|string next argument, null if there is no next argument |
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*/ |
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public function getNext() |
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{ |
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return $this->getByIndex($this->index + 1); |
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} |
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/** |
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* @param int $index |
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* @return string|null argument string or null if not found |
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*/ |
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private function getByIndex($index) |
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{ |
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$argsIndex = $this->getArgsIndex($index); |
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if (null === $argsIndex) { |
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return null; |
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} |
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if (!isset($this->args->arguments[$argsIndex])) { |
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return null; |
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} |
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return $this->args->arguments[$argsIndex]; |
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} |
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/** |
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* @param int $index to retrieve index for |
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* |
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* @return int|null integer index of the argument, null if there is none |
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*/ |
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private function getArgsIndex($index) |
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{ |
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if (!isset($this->indexes[$index])) { |
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return null; |
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} |
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return $this->indexes[$index]; |
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} |
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/* Iterator */ |
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/** |
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* Return the current element |
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* |
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* @return string |
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*/ |
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public function current() |
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{ |
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if (!$this->valid()) { |
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return null; |
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} |
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return $this->getByIndex($this->index); |
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} |
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/** |
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* Move forward to next option |
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*/ |
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public function next() |
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{ |
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if (!$this->valid()) { |
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return; |
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} |
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$this->index++; |
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} |
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/** |
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* Return the key of the current option |
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* |
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* @return int index, zero based |
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*/ |
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public function key() |
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{ |
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return $this->getArgsIndex($this->index); |
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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 bool |
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*/ |
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public function valid() |
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{ |
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$current = $this->getByIndex($this->index); |
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if (null === $current) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* @return void Any returned value is ignored. |
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*/ |
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6 |
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public function rewind() |
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{ |
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$this->index = 0; |
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6 |
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$this->indexes = array_keys($this->args->arguments); |
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} |
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} |
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ktomk /
pipelines
