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Markus
2022-04-28 09:40:10 +02:00
commit 795794f992
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<?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\Exceptions;
use CodeIgniter\Exceptions\FrameworkException;
class PagerException extends FrameworkException
{
public static function forInvalidTemplate(?string $template = null)
{
return new static(lang('Pager.invalidTemplate', [$template]));
}
public static function forInvalidPaginationGroup(?string $group = null)
{
return new static(lang('Pager.invalidPaginationGroup', [$group]));
}
}

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system/Pager/Pager.php Normal file
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<?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\Exceptions\HTTPException;
use CodeIgniter\HTTP\URI;
use CodeIgniter\Pager\Exceptions\PagerException;
use CodeIgniter\View\RendererInterface;
use Config\Pager as PagerConfig;
/**
* Class Pager
*
* The Pager class provides semi-automatic and manual methods for creating
* pagination links and reading the current url's query variable, "page"
* to determine the current page. This class can support multiple
* paginations on a single page.
*/
class Pager implements PagerInterface
{
/**
* The group data.
*
* @var array
*/
protected $groups = [];
/**
* URI segment for groups if provided.
*
* @var array
*/
protected $segment = [];
/**
* Our configuration instance.
*
* @var PagerConfig
*/
protected $config;
/**
* The view engine to render the links with.
*
* @var RendererInterface
*/
protected $view;
/**
* List of only permitted queries
*
* @var array
*/
protected $only = [];
/**
* Constructor.
*/
public function __construct(PagerConfig $config, RendererInterface $view)
{
$this->config = $config;
$this->view = $view;
}
/**
* Handles creating and displaying the
*
* @param string $template The output template alias to render.
*/
public function links(string $group = 'default', string $template = 'default_full'): string
{
$this->ensureGroup($group);
return $this->displayLinks($group, $template);
}
/**
* Creates simple Next/Previous links, instead of full pagination.
*/
public function simpleLinks(string $group = 'default', string $template = 'default_simple'): string
{
$this->ensureGroup($group);
return $this->displayLinks($group, $template);
}
/**
* Allows for a simple, manual, form of pagination where all of the data
* is provided by the user. The URL is the current URI.
*
* @param string $template The output template alias to render.
* @param int $segment (whether page number is provided by URI segment)
* @param string|null $group optional group (i.e. if we'd like to define custom path)
*/
public function makeLinks(int $page, ?int $perPage, int $total, string $template = 'default_full', int $segment = 0, ?string $group = 'default'): string
{
$group = $group === '' ? 'default' : $group;
$this->store($group, $page, $perPage ?? $this->config->perPage, $total, $segment);
return $this->displayLinks($group, $template);
}
/**
* Does the actual work of displaying the view file. Used internally
* by links(), simpleLinks(), and makeLinks().
*/
protected function displayLinks(string $group, string $template): string
{
if (! array_key_exists($template, $this->config->templates)) {
throw PagerException::forInvalidTemplate($template);
}
$pager = new PagerRenderer($this->getDetails($group));
return $this->view->setVar('pager', $pager)->render($this->config->templates[$template]);
}
/**
* Stores a set of pagination data for later display. Most commonly used
* by the model to automate the process.
*
* @return $this
*/
public function store(string $group, int $page, ?int $perPage, int $total, int $segment = 0)
{
if ($segment) {
$this->setSegment($segment, $group);
}
$this->ensureGroup($group, $perPage);
if ($segment > 0 && $this->groups[$group]['currentPage'] > 0) {
$page = $this->groups[$group]['currentPage'];
}
$perPage = $perPage ?? $this->config->perPage;
$pageCount = (int) ceil($total / $perPage);
$this->groups[$group]['currentPage'] = $page > $pageCount ? $pageCount : $page;
$this->groups[$group]['perPage'] = $perPage;
$this->groups[$group]['total'] = $total;
$this->groups[$group]['pageCount'] = $pageCount;
return $this;
}
/**
* Sets segment for a group.
*
* @return mixed
*/
public function setSegment(int $number, string $group = 'default')
{
$this->segment[$group] = $number;
return $this;
}
/**
* Sets the path that an aliased group of links will use.
*
* @return mixed
*/
public function setPath(string $path, string $group = 'default')
{
$this->ensureGroup($group);
$this->groups[$group]['uri']->setPath($path);
return $this;
}
/**
* Returns the total number of items in data store.
*/
public function getTotal(string $group = 'default'): int
{
$this->ensureGroup($group);
return $this->groups[$group]['total'];
}
/**
* Returns the total number of pages.
*/
public function getPageCount(string $group = 'default'): int
{
$this->ensureGroup($group);
return $this->groups[$group]['pageCount'];
}
/**
* Returns the number of the current page of results.
*/
public function getCurrentPage(string $group = 'default'): int
{
$this->ensureGroup($group);
return $this->groups[$group]['currentPage'] ?: 1;
}
/**
* Tells whether this group of results has any more pages of results.
*/
public function hasMore(string $group = 'default'): bool
{
$this->ensureGroup($group);
return ($this->groups[$group]['currentPage'] * $this->groups[$group]['perPage']) < $this->groups[$group]['total'];
}
/**
* Returns the last page, if we have a total that we can calculate with.
*
* @return int|null
*/
public function getLastPage(string $group = 'default')
{
$this->ensureGroup($group);
if (! is_numeric($this->groups[$group]['total']) || ! is_numeric($this->groups[$group]['perPage'])) {
return null;
}
return (int) ceil($this->groups[$group]['total'] / $this->groups[$group]['perPage']);
}
/**
* Determines the first page # that should be shown.
*/
public function getFirstPage(string $group = 'default'): int
{
$this->ensureGroup($group);
// @todo determine based on a 'surroundCount' value
return 1;
}
/**
* Returns the URI for a specific page for the specified group.
*
* @return string|URI
*/
public function getPageURI(?int $page = null, string $group = 'default', bool $returnObject = false)
{
$this->ensureGroup($group);
/**
* @var URI $uri
*/
$uri = $this->groups[$group]['uri'];
$segment = $this->segment[$group] ?? 0;
if ($segment) {
$uri->setSegment($segment, $page);
} else {
$uri->addQuery($this->groups[$group]['pageSelector'], $page);
}
if ($this->only) {
$query = array_intersect_key($_GET, array_flip($this->only));
if (! $segment) {
$query[$this->groups[$group]['pageSelector']] = $page;
}
$uri->setQueryArray($query);
}
return $returnObject === true ? $uri : URI::createURIString($uri->getScheme(), $uri->getAuthority(), $uri->getPath(), $uri->getQuery(), $uri->getFragment());
}
/**
* Returns the full URI to the next page of results, or null.
*
* @return string|null
*/
public function getNextPageURI(string $group = 'default', bool $returnObject = false)
{
$this->ensureGroup($group);
$last = $this->getLastPage($group);
$curr = $this->getCurrentPage($group);
$page = null;
if (! empty($last) && ! empty($curr) && $last === $curr) {
return null;
}
if ($last > $curr) {
$page = $curr + 1;
}
return $this->getPageURI($page, $group, $returnObject);
}
/**
* Returns the full URL to the previous page of results, or null.
*
* @return string|null
*/
public function getPreviousPageURI(string $group = 'default', bool $returnObject = false)
{
$this->ensureGroup($group);
$first = $this->getFirstPage($group);
$curr = $this->getCurrentPage($group);
$page = null;
if (! empty($first) && ! empty($curr) && $first === $curr) {
return null;
}
if ($first < $curr) {
$page = $curr - 1;
}
return $this->getPageURI($page, $group, $returnObject);
}
/**
* Returns the number of results per page that should be shown.
*/
public function getPerPage(string $group = 'default'): int
{
$this->ensureGroup($group);
return (int) $this->groups[$group]['perPage'];
}
/**
* Returns an array with details about the results, including
* total, per_page, current_page, last_page, next_url, prev_url, from, to.
* Does not include the actual data. This data is suitable for adding
* a 'data' object to with the result set and converting to JSON.
*/
public function getDetails(string $group = 'default'): array
{
if (! array_key_exists($group, $this->groups)) {
throw PagerException::forInvalidPaginationGroup($group);
}
$newGroup = $this->groups[$group];
$newGroup['next'] = $this->getNextPageURI($group);
$newGroup['previous'] = $this->getPreviousPageURI($group);
$newGroup['segment'] = $this->segment[$group] ?? 0;
return $newGroup;
}
/**
* Sets only allowed queries on pagination links.
*/
public function only(array $queries): self
{
$this->only = $queries;
return $this;
}
/**
* Ensures that an array exists for the group specified.
*
* @param int $perPage
*/
protected function ensureGroup(string $group, ?int $perPage = null)
{
if (array_key_exists($group, $this->groups)) {
return;
}
$this->groups[$group] = [
'uri' => clone current_url(true),
'hasMore' => false,
'total' => null,
'perPage' => $perPage ?? $this->config->perPage,
'pageCount' => 1,
'pageSelector' => $group === 'default' ? 'page' : 'page_' . $group,
];
$this->calculateCurrentPage($group);
if ($_GET) {
$this->groups[$group]['uri'] = $this->groups[$group]['uri']->setQueryArray($_GET);
}
}
/**
* Calculating the current page
*/
protected function calculateCurrentPage(string $group)
{
if (array_key_exists($group, $this->segment)) {
try {
$this->groups[$group]['currentPage'] = (int) $this->groups[$group]['uri']->setSilent(false)->getSegment($this->segment[$group]);
} catch (HTTPException $e) {
$this->groups[$group]['currentPage'] = 1;
}
} else {
$pageSelector = $this->groups[$group]['pageSelector'];
$page = (int) ($_GET[$pageSelector] ?? 1);
$this->groups[$group]['currentPage'] = $page < 1 ? 1 : $page;
}
}
}

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<?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;
/**
* Expected behavior for a Pager
*/
interface PagerInterface
{
/**
* Handles creating and displaying the
*
* @param string $template The output template alias to render.
*/
public function links(string $group = 'default', string $template = 'default'): string;
/**
* Creates simple Next/Previous links, instead of full pagination.
*/
public function simpleLinks(string $group = 'default', string $template = 'default'): string;
/**
* Allows for a simple, manual, form of pagination where all of the data
* is provided by the user. The URL is the current URI.
*
* @param string $template The output template alias to render.
*/
public function makeLinks(int $page, int $perPage, int $total, string $template = 'default'): string;
/**
* Stores a set of pagination data for later display. Most commonly used
* by the model to automate the process.
*
* @return mixed
*/
public function store(string $group, int $page, int $perPage, int $total);
/**
* Sets the path that an aliased group of links will use.
*
* @return mixed
*/
public function setPath(string $path, string $group = 'default');
/**
* Returns the total number of pages.
*/
public function getPageCount(string $group = 'default'): int;
/**
* Returns the number of the current page of results.
*/
public function getCurrentPage(string $group = 'default'): int;
/**
* Returns the URI for a specific page for the specified group.
*
* @return string|URI
*/
public function getPageURI(?int $page = null, string $group = 'default', bool $returnObject = false);
/**
* Tells whether this group of results has any more pages of results.
*/
public function hasMore(string $group = 'default'): bool;
/**
* Returns the first page.
*
* @return int
*/
public function getFirstPage(string $group = 'default');
/**
* Returns the last page, if we have a total that we can calculate with.
*
* @return int|null
*/
public function getLastPage(string $group = 'default');
/**
* Returns the full URI to the next page of results, or null.
*
* @return string|null
*/
public function getNextPageURI(string $group = 'default');
/**
* Returns the full URL to the previous page of results, or null.
*
* @return string|null
*/
public function getPreviousPageURI(string $group = 'default');
/**
* Returns the number of results per page that should be shown.
*/
public function getPerPage(string $group = 'default'): int;
/**
* Returns an array with details about the results, including
* total, per_page, current_page, last_page, next_url, prev_url, from, to.
* Does not include the actual data. This data is suitable for adding
* a 'data' object to with the result set and converting to JSON.
*/
public function getDetails(string $group = 'default'): array;
}

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<?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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<?php
use CodeIgniter\Pager\PagerRenderer;
/**
* @var PagerRenderer $pager
*/
$pager->setSurroundCount(2);
?>
<nav aria-label="<?= lang('Pager.pageNavigation') ?>">
<ul class="pagination">
<?php if ($pager->hasPrevious()) : ?>
<li>
<a href="<?= $pager->getFirst() ?>" aria-label="<?= lang('Pager.first') ?>">
<span aria-hidden="true"><?= lang('Pager.first') ?></span>
</a>
</li>
<li>
<a href="<?= $pager->getPrevious() ?>" aria-label="<?= lang('Pager.previous') ?>">
<span aria-hidden="true"><?= lang('Pager.previous') ?></span>
</a>
</li>
<?php endif ?>
<?php foreach ($pager->links() as $link) : ?>
<li <?= $link['active'] ? 'class="active"' : '' ?>>
<a href="<?= $link['uri'] ?>">
<?= $link['title'] ?>
</a>
</li>
<?php endforeach ?>
<?php if ($pager->hasNext()) : ?>
<li>
<a href="<?= $pager->getNext() ?>" aria-label="<?= lang('Pager.next') ?>">
<span aria-hidden="true"><?= lang('Pager.next') ?></span>
</a>
</li>
<li>
<a href="<?= $pager->getLast() ?>" aria-label="<?= lang('Pager.last') ?>">
<span aria-hidden="true"><?= lang('Pager.last') ?></span>
</a>
</li>
<?php endif ?>
</ul>
</nav>

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<?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.
*/
use CodeIgniter\Pager\PagerRenderer;
/**
* @var PagerRenderer $pager
*/
$pager->setSurroundCount(0);
if ($pager->hasPrevious()) {
echo '<link rel="prev" href="' . $pager->getPrevious() . '">' . PHP_EOL;
}
echo '<link rel="canonical" href="' . $pager->getCurrent() . '">' . PHP_EOL;
if ($pager->hasNext()) {
echo '<link rel="next" href="' . $pager->getNext() . '">' . PHP_EOL;
}

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<?php
use CodeIgniter\Pager\PagerRenderer;
/**
* @var PagerRenderer $pager
*/
$pager->setSurroundCount(0);
?>
<nav>
<ul class="pager">
<li <?= $pager->hasPrevious() ? '' : 'class="disabled"' ?>>
<a href="<?= $pager->getPrevious() ?? '#' ?>" aria-label="<?= lang('Pager.previous') ?>">
<span aria-hidden="true"><?= lang('Pager.newer') ?></span>
</a>
</li>
<li <?= $pager->hasNext() ? '' : 'class="disabled"' ?>>
<a href="<?= $pager->getnext() ?? '#' ?>" aria-label="<?= lang('Pager.next') ?>">
<span aria-hidden="true"><?= lang('Pager.older') ?></span>
</a>
</li>
</ul>
</nav>