<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2014-2019 British Columbia Institute of Technology
* Copyright (c) 2019-2020 CodeIgniter Foundation
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @package CodeIgniter
* @author CodeIgniter Dev Team
* @copyright 2019-2020 CodeIgniter Foundation
* @license https://opensource.org/licenses/MIT MIT License
* @link https://codeigniter.com
* @since Version 4.0.0
* @filesource
*/
namespace CodeIgniter\Pager;
/**
* Class PagerRenderer
*
* This class is passed to the view that describes the pagination,
* and is used to get the link information and provide utility
* methods needed to work with pagination.
*
* @package CodeIgniter\Pager
*/
class PagerRenderer
{
/**
* First page number.
*
* @var integer
*/
protected $first;
/**
* Last page number.
*
* @var integer
*/
protected $last;
/**
* Current page number.
*
* @var integer
*/
protected $current;
/**
* Total number of pages? unused?
*
* @var integer
*/
protected $total;
/**
* Page count?
*
* @var integer
*/
protected $pageCount;
/**
* URI base for pagination links
*
* @var integer
*/
protected $uri;
/**
* Segment number used for pagination.
*
* @var integer
*/
protected $segment;
/**
* Name of $_GET parameter
*
* @var integer
*/
protected $pageSelector;
//--------------------------------------------------------------------
/**
* Constructor.
*
* @param array $details
*/
public function __construct(array $details)
{
$this->first = 1;
$this->last = $details['pageCount'];
$this->current = $details['currentPage'];
$this->total = $details['total'];
$this->uri = $details['uri'];
$this->pageCount = $details['pageCount'];
$this->segment = $details['segment'] ?? 0;
$this->pageSelector = $details['pageSelector'] ?? 'page';
}
//--------------------------------------------------------------------
/**
* Sets the total number of links that should appear on either
* side of the current page. Adjusts the first and last counts
* to reflect it.
*
* @param integer|null $count
*
* @return PagerRenderer
*/
public function setSurroundCount(int $count = null)
{
$this->updatePages($count);
return $this;
}
//--------------------------------------------------------------------
/**
* Checks to see if there is a "previous" page before our "first" page.
*
* @return boolean
*/
public function hasPrevious(): bool
{
return $this->first > 1;
}
//--------------------------------------------------------------------
/**
* Returns a URL to the "previous" page. The previous page is NOT the
* page before the current page, but is the page just before the
* "first" page.
*
* You MUST call hasPrevious() first, or this value may be invalid.
*
* @return string|null
*/
public function getPrevious()
{
if (! $this->hasPrevious())
{
return null;
}
$uri = clone $this->uri;
if ($this->segment === 0)
{
$uri->addQuery($this->pageSelector, $this->first - 1);
}
else
{
$uri->setSegment($this->segment, $this->first - 1);
}
return (string) $uri;
}
//--------------------------------------------------------------------
/**
* Checks to see if there is a "next" page after our "last" page.
*
* @return boolean
*/
public function hasNext(): bool
{
return $this->pageCount > $this->last;
}
//--------------------------------------------------------------------
/**
* Returns a URL to the "next" page. The next page is NOT, the
* page after the current page, but is the page that follows the
* "last" page.
*
* You MUST call hasNext() first, or this value may be invalid.
*
* @return string|null
*/
public function getNext()
{
if (! $this->hasNext())
{
return null;
}
$uri = clone $this->uri;
if ($this->segment === 0)
{
$uri->addQuery($this->pageSelector, $this->last + 1);
}
else
{
$uri->setSegment($this->segment, $this->last + 1);
}
return (string) $uri;
}
//--------------------------------------------------------------------
/**
* Returns the URI of the first page.
*
* @return string
*/
public function getFirst(): string
{
$uri = clone $this->uri;
if ($this->segment === 0)
{
$uri->addQuery($this->pageSelector, 1);
}
else
{
$uri->setSegment($this->segment, 1);
}
return (string) $uri;
}
//--------------------------------------------------------------------
/**
* Returns the URI of the last page.
*
* @return string
*/
public function getLast(): string
{
$uri = clone $this->uri;
if ($this->segment === 0)
{
$uri->addQuery($this->pageSelector, $this->pageCount);
}
else
{
$uri->setSegment($this->segment, $this->pageCount);
}
return (string) $uri;
}
//--------------------------------------------------------------------
/**
* Returns the URI of the current page.
*
* @return string
*/
public function getCurrent(): string
{
$uri = clone $this->uri;
if ($this->segment === 0)
{
$uri->addQuery($this->pageSelector, $this->current);
}
else
{
$uri->setSegment($this->segment, $this->current);
}
return (string) $uri;
}
//--------------------------------------------------------------------
/**
* Returns an array of links that should be displayed. Each link
* is represented by another array containing of the URI the link
* should go to, the title (number) of the link, and a boolean
* value representing whether this link is active or not.
*
* @return array
*/
public function links(): array
{
$links = [];
$uri = clone $this->uri;
for ($i = $this->first; $i <= $this->last; $i ++)
{
$links[] = [
'uri' => (string) ($this->segment === 0 ? $uri->addQuery($this->pageSelector, $i) : $uri->setSegment($this->segment, $i)),
'title' => (int) $i,
'active' => ($i === $this->current),
];
}
return $links;
}
//--------------------------------------------------------------------
/**
* Updates the first and last pages based on $surroundCount,
* which is the number of links surrounding the active page
* to show.
*
* @param integer|null $count The new "surroundCount"
*/
protected function updatePages(int $count = null)
{
if (is_null($count))
{
return;
}
$this->first = $this->current - $count > 0 ? (int) ($this->current - $count) : 1;
$this->last = $this->current + $count <= $this->pageCount ? (int) ($this->current + $count) : (int) $this->pageCount;
}
//--------------------------------------------------------------------
/**
* Checks to see if there is a "previous" page before our "first" page.
*
* @return boolean
*/
public function hasPreviousPage(): bool
{
return $this->current > 1;
}
//--------------------------------------------------------------------
/**
* Returns a URL to the "previous" page.
*
* You MUST call hasPreviousPage() first, or this value may be invalid.
*
* @return string|null
*/
public function getPreviousPage()
{
if (!$this->hasPreviousPage()) {
return null;
}
$uri = clone $this->uri;
if ($this->segment === 0) {
$uri->addQuery($this->pageSelector, $this->current - 1);
} else {
$uri->setSegment($this->segment, $this->current - 1);
}
return (string) $uri;
}
//--------------------------------------------------------------------
/**
* Checks to see if there is a "next" page after our "last" page.
*
* @return boolean
*/
public function hasNextPage(): bool
{
return $this->current < $this->last;
}
//--------------------------------------------------------------------
/**
* Returns a URL to the "next" page.
*
* You MUST call hasNextPage() first, or this value may be invalid.
*
* @return string|null
*/
public function getNextPage()
{
if (!$this->hasNextPage()) {
return null;
}
$uri = clone $this->uri;
if ($this->segment === 0) {
$uri->addQuery($this->pageSelector, $this->current + 1);
} else {
$uri->setSegment($this->segment, $this->current + 1);
}
return (string) $uri;
}
}
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