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91 lines
2.2 KiB
PHP
91 lines
2.2 KiB
PHP
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<?php
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namespace RESTful;
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class Pagination implements \IteratorAggregate, \ArrayAccess
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{
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public $resource,
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$uri;
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protected $_page,
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$_offset = 0,
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$_size = 25;
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public function __construct($resource, $uri, $data = null)
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{
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$this->resource = $resource;
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$this->uri = $uri;
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if ($data != null) {
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$this->_page = new Page($resource, $uri, $data);
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} else {
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$this->_page = null;
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}
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}
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protected function _getPage($offset = null)
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{
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if ($this->_page == null) {
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$this->_offset = ($offset == null) ? 0 : $offset * $this->_size;
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$uri = $this->_buildUri();
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$this->_page = new Page($this->resource, $uri);
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} elseif ($offset != null) {
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$offset = $offset * $this->_size;
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if ($offset != $this->_offset) {
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$this->_offset = $offset;
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$uri = $this->_buildUri();
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$this->_page = new Page($this->resource, $uri);
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}
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}
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return $this->_page;
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}
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public function total()
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{
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return floor($this->_getPage()->total / $this->_size);
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}
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protected function _buildUri($offset = null)
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{
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# TODO: hacky but works for now
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$offset = ($offset == null) ? $this->_offset : $offset;
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if (strpos($this->uri, '?') === false) {
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$uri = $this->uri . '?';
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} else {
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$uri = $this->uri . '&';
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}
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$uri = $uri . 'offset=' . strval($offset);
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return $uri;
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}
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// IteratorAggregate
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public function getIterator()
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{
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$uri = $this->_buildUri($offset = 0);
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return new PaginationIterator($this->resource, $uri);
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}
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// ArrayAccess
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public function offsetSet($offset, $value)
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{
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throw new \BadMethodCallException(get_class($this) . ' array access is read-only');
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}
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public function offsetExists($offset)
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{
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return (0 <= $offset && $offset < $this->total());
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}
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public function offsetUnset($offset)
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{
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throw new \BadMethodCallException(get_class($this) . ' array access is read-only');
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}
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public function offsetGet($offset)
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{
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return $this->_getPage($offset);
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}
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}
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