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<?php |
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namespace iio\libmergepdf; |
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/** |
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* Parse page numbers from string |
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*/ |
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class Pages implements \IteratorAggregate |
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{ |
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/** |
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* @var integer[] Added integer page numbers |
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*/ |
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private $pages = []; |
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/** |
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* Constructor |
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* |
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* Pages should be formatted as 1,3,6 or 12-16 or combined. Note that pages |
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* are merged in the order that you provide them. If you put pages 12-14 |
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* before 1-5 then 12-14 will be placed first. |
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* |
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* @param string $expressionString |
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* @throws Exception If unable to parse page numbers |
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*/ |
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public function __construct($expressionString = '') |
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{ |
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$expressions = explode( |
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',', |
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str_replace(' ', '', $expressionString) |
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); |
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foreach ($expressions as $expr) { |
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if (empty($expr)) { |
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continue; |
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} |
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if (ctype_digit($expr)) { |
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$this->addPage($expr); |
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continue; |
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} |
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if (preg_match("/^(\d+)-(\d+)/", $expr, $matches)) { |
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$this->addRange($matches[1], $matches[2]); |
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continue; |
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} |
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throw new Exception("Invalid page number(s) for expression '$expr'"); |
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} |
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} |
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/** |
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* Add page to collection |
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* |
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* @param int|string $page |
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* @return void |
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*/ |
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public function addPage($page) |
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{ |
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assert('is_numeric($page)'); |
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$this->pages[] = intval($page); |
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} |
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/** |
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* Add range of pages |
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* |
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* @param int|string $start |
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* @param int|string $end |
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* @return void |
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*/ |
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public function addRange($start, $end) |
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{ |
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assert('is_numeric($start)'); |
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assert('is_numeric($end)'); |
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$this->pages = array_merge($this->pages, range($start, $end)); |
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} |
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/** |
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* Get array of integer page numbers |
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* |
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* @return integer[] |
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*/ |
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public function getPages() |
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{ |
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return $this->pages; |
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} |
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/** |
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* Get iterator of page numbers |
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*/ |
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public function getIterator() |
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{ |
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return new \ArrayIterator($this->getPages()); |
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} |
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/** |
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* Check if pages has been sprcified |
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* |
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* @return boolean |
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*/ |
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public function hasPages() |
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{ |
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return !empty($this->getPages()); |
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} |
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} |
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hanneskod /
libmergepdf
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..