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Paginator.php
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196 lines (155 loc) · 4.85 KB
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<?php
declare(strict_types=1);
namespace Phenix\Database;
use League\Uri\Components\Query;
use League\Uri\Http;
use Phenix\Contracts\Arrayable;
use Phenix\Data\Collection;
use Phenix\Util\URL;
class Paginator implements Arrayable
{
private Query $query;
private int $itemsEachSide = 2;
private int $linksNumber = 5;
private readonly int $lastPage;
private bool $withQueryParameters = true;
public function __construct(
private Http $uri,
private Collection $data,
private readonly int $total,
private readonly int $currentPage,
private readonly int $perPage
) {
$this->query = Query::fromUri($this->uri);
$this->lastPage = (int) ceil($this->total / $this->perPage);
}
public function withoutQueryParameters(): self
{
$this->withQueryParameters = false;
return $this;
}
public function data(): Collection
{
return $this->data;
}
public function total(): int
{
return $this->total;
}
public function perPage(): int
{
return $this->perPage;
}
public function currentPage(): int
{
return $this->currentPage;
}
public function lastPage(): int
{
return $this->lastPage;
}
public function hasPreviousPage()
{
return $this->currentPage > 1;
}
public function hasNextPage()
{
return $this->currentPage < $this->lastPage;
}
public function from(): int
{
return (($this->currentPage - 1) * $this->perPage) + 1;
}
public function to(): int
{
if ($this->hasNextPage()) {
return $this->currentPage * $this->perPage;
}
return $this->total;
}
public function links(): array
{
$links = [];
$separator = ['url' => null, 'label' => '...'];
$prepend = ($this->currentPage + 1) - $this->itemsEachSide;
$prepend = $prepend < 0 ? 0 : $prepend;
if ($prepend > ($this->itemsEachSide + 1)) {
$prepend = $this->itemsEachSide;
$links[] = $this->buildLink(1);
$links[] = $separator;
}
$start = $this->currentPage - $prepend;
for ($i = $start; $i < $this->currentPage; $i++) {
$links[] = $this->buildLink($i);
}
$append = $this->linksNumber - $prepend;
$append = ($this->currentPage + $append) > $this->lastPage
? ($this->lastPage - $this->currentPage) + 1
: $append;
$limit = $this->currentPage + $append;
for ($i = $this->currentPage; $i < $limit; $i++) {
$links[] = $this->buildLink($i);
}
if (($this->lastPage - ($this->currentPage + $append)) >= 1) {
$links[] = $separator;
$links[] = $this->buildLink($this->lastPage);
}
if (($this->lastPage - ($this->currentPage + $append)) === 0) {
$links[] = $this->buildLink($this->lastPage);
}
return $links;
}
public function toArray(): array
{
return [
'path' => URL::build($this->uri->getPath()),
'current_page' => $this->currentPage,
'last_page' => $this->lastPage,
'per_page' => $this->perPage,
'total' => $this->total,
'first_page_url' => $this->getFirstPageUrl(),
'last_page_url' => $this->getLastPageUrl(),
'prev_page_url' => $this->getPrevPageUrl(),
'next_page_url' => $this->getNextPageUrl(),
'from' => $this->from(),
'to' => $this->to(),
'data' => $this->data->toArray(),
'links' => $this->links(),
];
}
private function getQueryParameters(): array
{
return $this->withQueryParameters
? $this->query->parameters()
: [];
}
private function buildLink(int $page, string|int|null $label = null): array
{
return ['url' => $this->buildPageUrl($page), 'label' => $label ?? $page];
}
private function buildPageUrl(int $page): string
{
$parameters['page'] = $page;
if ($this->query->has('per_page')) {
$parameters['per_page'] = $this->perPage;
}
$parameters = array_merge($this->getQueryParameters(), $parameters);
return URL::build($this->uri->getPath(), $parameters);
}
private function getFirstPageUrl(): string
{
return $this->buildPageUrl(1);
}
private function getLastPageUrl(): string
{
return $this->buildPageUrl($this->lastPage);
}
private function getPrevPageUrl(): string|null
{
return $this->hasPreviousPage() ? $this->buildPageUrl($this->currentPage - 1) : null;
}
private function getNextPageUrl(): string|null
{
return $this->hasNextPage() ? $this->buildPageUrl($this->currentPage + 1) : null;
}
}