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ðŸ“ Exceptions
ðŸ“„ Pager.php(11.4 KB)
ðŸ“„ PagerInterface.php(3.32 KB)
ðŸ“„ PagerRenderer.php(9.32 KB)
ðŸ“ Views

Editing: PagerRenderer.php

<?php

/**
 * This file is part of CodeIgniter 4 framework.
 *
 * (c) CodeIgniter Foundation <admin@codeigniter.com>
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

namespace CodeIgniter\Pager;

use CodeIgniter\HTTP\URI;

/**
 * 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.
 */
class PagerRenderer
{
    /**
     * First page number.
     *
     * @var int
     */
    protected $first;

/**
     * Last page number.
     *
     * @var int
     */
    protected $last;

/**
     * Current page number.
     *
     * @var int
     */
    protected $current;

/**
     * Total number of items.
     *
     * @var int
     */
    protected $total;

/**
     * Total number of pages.
     *
     * @var int
     */
    protected $pageCount;

/**
     * URI base for pagination links
     *
     * @var URI
     */
    protected $uri;

/**
     * Segment number used for pagination.
     *
     * @var int
     */
    protected $segment;

/**
     * Name of $_GET parameter
     *
     * @var string
     */
    protected $pageSelector;

/**
     * Constructor.
     */
    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.
     *
     * @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.
     */
    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 URI::createURIString($uri->getScheme(), $uri->getAuthority(), $uri->getPath(), $uri->getQuery(), $uri->getFragment());
    }

/**
     * Checks to see if there is a "next" page after our "last" page.
     */
    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 URI::createURIString($uri->getScheme(), $uri->getAuthority(), $uri->getPath(), $uri->getQuery(), $uri->getFragment());
    }

/**
     * Returns the URI of the first page.
     */
    public function getFirst(): string
    {
        $uri = clone $this->uri;

if ($this->segment === 0) {
            $uri->addQuery($this->pageSelector, 1);
        } else {
            $uri->setSegment($this->segment, 1);
        }

return URI::createURIString($uri->getScheme(), $uri->getAuthority(), $uri->getPath(), $uri->getQuery(), $uri->getFragment());
    }

/**
     * Returns the URI of the last page.
     */
    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 URI::createURIString($uri->getScheme(), $uri->getAuthority(), $uri->getPath(), $uri->getQuery(), $uri->getFragment());
    }

/**
     * Returns the URI of the current page.
     */
    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 URI::createURIString($uri->getScheme(), $uri->getAuthority(), $uri->getPath(), $uri->getQuery(), $uri->getFragment());
    }

/**
     * 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.
     */
    public function links(): array
    {
        $links = [];

$uri = clone $this->uri;

for ($i = $this->first; $i <= $this->last; $i++) {
            $uri     = $this->segment === 0 ? $uri->addQuery($this->pageSelector, $i) : $uri->setSegment($this->segment, $i);
            $links[] = [
                'uri'    => URI::createURIString($uri->getScheme(), $uri->getAuthority(), $uri->getPath(), $uri->getQuery(), $uri->getFragment()),
                'title'  => $i,
                'active' => ($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 int|null $count The new "surroundCount"
     */
    protected function updatePages(?int $count = null)
    {
        if ($count === null) {
            return;
        }

$this->first = $this->current - $count > 0 ? $this->current - $count : 1;
        $this->last  = $this->current + $count <= $this->pageCount ? $this->current + $count : (int) $this->pageCount;
    }

/**
     * Checks to see if there is a "previous" page before our "first" page.
     */
    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 URI::createURIString($uri->getScheme(), $uri->getAuthority(), $uri->getPath(), $uri->getQuery(), $uri->getFragment());
    }

/**
     * Checks to see if there is a "next" page after our "last" page.
     */
    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 URI::createURIString($uri->getScheme(), $uri->getAuthority(), $uri->getPath(), $uri->getQuery(), $uri->getFragment());
    }

/**
     * Returns the page number of the first page.
     */
    public function getFirstPageNumber(): int
    {
        return $this->first;
    }

/**
     * Returns the page number of the current page.
     */
    public function getCurrentPageNumber(): int
    {
        return $this->current;
    }

/**
     * Returns the page number of the last page.
     */
    public function getLastPageNumber(): int
    {
        return $this->last;
    }

/**
     * Returns total number of pages.
     */
    public function getPageCount(): int
    {
        return $this->pageCount;
    }

/**
     * Returns the previous page number.
     */
    public function getPreviousPageNumber(): ?int
    {
        return ($this->current === 1) ? null : $this->current - 1;
    }

/**
     * Returns the next page number.
     */
    public function getNextPageNumber(): ?int
    {
        return ($this->current === $this->pageCount) ? null : $this->current + 1;
    }
}

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