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<?php defined('SYSPATH') or die('No direct script access.');
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/**
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* Pagination library.
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*
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* $Id: Pagination.php 1911 2008-02-04 16:13:16Z PugFish $
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*
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* @package Core
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* @author Kohana Team
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* @copyright (c) 2007-2008 Kohana Team
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* @license http://kohanaphp.com/license.html
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*/
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class Pagination {
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// Config values
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protected $base_url = '';
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protected $directory = 'pagination';
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protected $style = 'classic';
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protected $uri_segment = 3;
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protected $items_per_page = 10;
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protected $total_items = 0;
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// Automatically generated values
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protected $url;
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protected $current_page;
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protected $total_pages;
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protected $current_first_item;
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protected $current_last_item;
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protected $first_page;
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protected $last_page;
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protected $previous_page;
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protected $next_page;
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protected $sql_offset;
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protected $sql_limit;
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/**
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* Constructs the Pagination object.
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*
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* @param array configuration
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* @return void
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*/
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public function __construct($config = array())
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{
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// Load configuration
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$config += (array) Config::get('pagination', FALSE, FALSE);
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$this->initialize($config);
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Log::add('debug', 'Pagination Library initialized');
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}
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/**
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* Sets or overwrites (some) config values.
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*
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* @param array configuration
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* @return void
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*/
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public function initialize($config = array())
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{
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// Assign config values to the object
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foreach ($config as $key => $value)
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{
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if (property_exists($this, $key))
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{
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$this->$key = $value;
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}
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}
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// Clean view directory
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$this->directory = trim($this->directory, '/').'/';
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/**
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* Hack to work with anchor's segment of URL
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*
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* @author Michal Kliment
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*/
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if (strpos($this->base_url, '#') !== FALSE)
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{
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list($this->base_url, $anchor) = explode('#',$this->base_url);
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if ($anchor != '')
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$anchor = '#'.$anchor;
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}
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else
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$anchor = '';
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// Start building a generic URL
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$this->url = ($this->base_url == '') ? Router::$segments : explode('/', trim($this->base_url, '/'));
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// Convert uri 'label' to corresponding integer if needed
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if (is_string($this->uri_segment))
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{
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if (($key = array_search($this->uri_segment, $this->url)) === FALSE)
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{
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// If uri 'label' is not found, auto add it to base_url
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$this->url[] = $this->uri_segment;
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$this->uri_segment = count($this->url) + 1;
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}
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else
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{
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$this->uri_segment = $key + 2;
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}
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}
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// Create a generic URL with query string and {page} number placeholder
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$this->url[$this->uri_segment - 1] = '{page}';
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$this->url = url::site(implode('/', $this->url)).Router::$query_string.$anchor;
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$segments = explode("/", Kohana::instance()->uri);
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$segment = (isset($segments[$this->uri_segment-1])) ? $segments[$this->uri_segment-1] : 1;
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// Core pagination values
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$this->total_items = (int) max(0, $this->total_items);
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$this->items_per_page = (int) max(1, $this->items_per_page);
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$this->total_pages = (int) ceil($this->total_items / $this->items_per_page);
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$this->current_page = (int) min($segment, max(1, $this->total_pages));
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$this->current_first_item = (int) min((($this->current_page - 1) * $this->items_per_page) + 1, $this->total_items);
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$this->current_last_item = (int) min($this->current_first_item + $this->items_per_page - 1, $this->total_items);
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// If there is no first/last/previous/next page, relative to the
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// current page, value is set to FALSE. Valid page number otherwise.
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$this->first_page = ($this->current_page == 1) ? FALSE : 1;
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$this->last_page = ($this->current_page >= $this->total_pages) ? FALSE : $this->total_pages;
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$this->previous_page = ($this->current_page > 1) ? $this->current_page - 1 : FALSE;
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$this->next_page = ($this->current_page < $this->total_pages) ? $this->current_page + 1 : FALSE;
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// SQL values
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$this->sql_offset = (int) ($this->current_page - 1) * $this->items_per_page;
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$this->sql_limit = sprintf(' LIMIT %d OFFSET %d ', $this->items_per_page, $this->sql_offset);
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}
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/**
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* Generates the HTML for the chosen pagination style.
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*
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* @param string pagination style
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* @return string pagination html
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*/
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public function create_links($style = NULL)
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{
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$style = (isset($style)) ? $style : $this->style;
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$view = new View($this->directory.$style, get_object_vars($this));
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return $view->render();
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}
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/**
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* Magically converts pagination object to string.
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*
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* @return string pagination html
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*/
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public function __toString()
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{
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return $this->create_links();
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}
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/**
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* Magically gets a pagination variable.
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*
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* @param string variable key
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* @return mixed variable value if the key is found
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* @return void if the key is not found
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*/
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public function __get($key)
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{
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if (isset($this->$key))
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return $this->$key;
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}
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/**
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* Gets the SQL offset of the first row to return. Deprecated.
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*
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* @return integer sql offset
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*/
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public function sql_offset()
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{
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return $this->sql_offset;
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}
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/**
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* Generates the complete SQL LIMIT clause. Deprecated.
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*
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* @return string sql limit clause
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*/
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public function sql_limit()
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{
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return $this->sql_limit;
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}
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} // End Pagination Class
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