From c78a0c4fdf916d39e49ac758c6730c8611fb1caa Mon Sep 17 00:00:00 2001
From: Robert Sesek <rsesek@bluestatic.org>
Date: Mon, 22 Aug 2005 00:23:11 +0000
Subject: [PATCH] r356: Pagination engine works

---
 includes/class_pagination.php | 230 ++++++++++++++++++++++++++++++++++
 1 file changed, 230 insertions(+)
 create mode 100644 includes/class_pagination.php

diff --git a/includes/class_pagination.php b/includes/class_pagination.php
new file mode 100644
index 0000000..30bcb3e
--- /dev/null
+++ b/includes/class_pagination.php
@@ -0,0 +1,230 @@
+<?php
+/*=====================================================================*\
+|| ################################################################### ||
+|| # BugStrike [#]version[#]
+|| # --------------------------------------------------------------- # ||
+|| # Copyright ©2002-[#]year[#] by Iris Studios, Inc. All Rights Reserved. # ||
+|| # This file may not be reproduced in any way without permission.  # ||
+|| # --------------------------------------------------------------- # ||
+|| # User License Agreement at http://www.iris-studios.com/license/  # ||
+|| ################################################################### ||
+\*=====================================================================*/
+
+/**
+* Class that is responsible for paginating data. Takes passed
+* parameters and creates pagination links.
+*/
+class Pagination
+{
+	/**
+	* Current page number
+	* @var	integer
+	*/
+	var $page;
+	
+	/**
+	* Per-page value
+	* @var	integer
+	*/
+	var $perpage;
+	
+	/**
+	* Number of page links
+	* @var	integer
+	*/
+	var $pagelinks;
+	
+	/**
+	* Total number of results
+	* @var	integer
+	*/
+	var $total;
+	
+	/**
+	* Total number of pages
+	* @var	integer
+	*/
+	var $pagecount;
+	
+	/**
+	* Constructor: sanitize incoming variables
+	*
+	* @param	string	Name of page number variable
+	* @param	string	Name of per-page variable
+	*/
+	function Pagination($page, $perpage)
+	{
+		global $bugsys;
+		
+		$this->page = intval($bugsys->in["$page"]);
+		$this->perpage = intval($bugsys->in["$perpage"]);
+		$this->pagelinks = intval($bugsys->options['pagelinks']);
+		
+		if ($this->page <= 0)
+		{
+			$this->page = 1;
+		}
+		
+		if ($this->perpage <= 0)
+		{
+			$this->perpage = $bugsys->options['defaultpp'];
+		}
+		if ($this->perpage > $bugsys->options['maxpp'])
+		{
+			$this->perpage = $bugsys->options['maxpp'];
+		}
+	}
+	
+	/**
+	* Takes the variables and splits up the pages
+	*
+	* @access	protected
+	*/
+	function split_pages()
+	{
+		$this->pagecount = ceil($this->total / $this->perpage);
+	}
+	
+	/**
+	* Returns the lower limit of the pages
+	*
+	* @access	public
+	*
+	* @param	integer	Page number
+	*
+	* @return	integer	Lower result limit
+	*/
+	function fetch_limit($page = null)
+	{
+		if ($page === null)
+		{
+			$page = $this->page;
+		}
+		
+		if ($page < 1)
+		{
+			$page = 1;
+		}
+		else if ($page > $this->pagecount)
+		{
+			$page = $this->pagecount - 1;
+		}
+		
+		$limit = $page * $this->perpage;
+		
+		if ($limit < 0)
+		{
+			return 0;
+		}
+		else if ($limit > $this->total)
+		{
+			return $this->total;
+		}
+		else
+		{
+			return $limit;
+		}
+	}
+	
+	/**
+	* Constructs the page navigator
+	*
+	* @access	public
+	*
+	* @return	string	Generated HTML page navigator
+	*/
+	function construct_page_nav()
+	{
+		// first page number in page nav
+		$startpage = $this->page - $this->pagelinks;
+		if ($startpage < 1)
+		{
+			$startpage = 1;
+		}
+		
+		// last page number in page nav
+		$endpage = $this->page + $this->pagelinks;
+		if ($endpage > $this->pagecount)
+		{
+			$endpage = $this->pagecount;
+		}
+		
+		// prev page in page nav
+		$prevpage = $this->page - 1;
+		if ($prevpage < 1)
+		{
+			$prevpage = 1;
+		}
+		
+		// next page in page nav
+		$nextpage = $this->page + 1;
+		if ($nextpage > $this->pagecount)
+		{
+			$nextpage = $this->pagecount;
+		}
+		
+		// show the prev page
+		$doprev = true;
+		if ($this->page == $startpage)
+		{
+			$doprev = false;
+		}
+		
+		// show the next page
+		$donext = true;
+		if ($this->page == $endpage)
+		{
+			$donext = false;
+		}
+		
+		// show the first page
+		$dofirst = false;
+		if ($startpage > 1)
+		{
+			$dofirst = true;
+		}
+		
+		// show the last page
+		$dolast = false;
+		if ($endpage < $this->pagecount)
+		{
+			$dolast = true;
+		}
+		
+		// add the special links
+		if ($dofirst)
+		{
+			$pages[] = 'first';
+		}
+		if ($doprev)
+		{
+			$pages[] = 'prev';
+		}
+		
+		// construct the page bits
+		for ($i = $startpage; $i <= $endpage; $i++)
+		{
+			$pages[] = ($i == $this->page ? "<strong>$i</strong>" : $i);
+		}
+		
+		// last special links
+		if ($donext)
+		{
+			$pages[] = 'next';
+		}
+		if ($dolast)
+		{
+			$pages[] = 'last';
+		}
+		
+		return $pages;
+	}
+}
+
+/*=====================================================================*\
+|| ###################################################################
+|| # $HeadURL$
+|| # $Id$
+|| ###################################################################
+\*=====================================================================*/
+?>
\ No newline at end of file
-- 
2.43.5