74 lines
1.8 KiB
PHP
74 lines
1.8 KiB
PHP
<?php
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namespace Misuzu;
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use Index\Http\HttpRequest;
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final class Pagination {
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public private(set) bool $validOffset;
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public function __construct(
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public private(set) int $count = 0,
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public private(set) int $range = 0,
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public private(set) int $offset = 0
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) {
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$this->count = max(0, $count);
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if($range < 1)
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$this->range = $count;
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$this->validOffset = $offset >= 0 && $offset < $count;
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$this->offset = max(0, $offset);
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}
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public int $pages {
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get => (int)ceil($this->count / $this->range);
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}
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public int $page {
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get => (int)floor($this->offset / $this->range) + 1;
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}
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public static function fromPage(
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int $count,
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int $page,
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int $range = 0,
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int $firstPage = 1
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): self {
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if($range < 1)
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$range = $count;
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$offset = $range * ($page - $firstPage);
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if($offset < 0 || $offset >= $count)
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$offset = -1;
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return new Pagination($count, $range, $offset);
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}
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public static function fromInput(
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int $count,
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int $range = 0,
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string $pageParam = 'p',
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int $firstPage = 1
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): self {
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return self::fromPage(
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$count,
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(int)(filter_input(INPUT_GET, $pageParam, FILTER_SANITIZE_NUMBER_INT) ?? $firstPage),
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$range,
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$firstPage
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);
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}
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public static function fromRequest(
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HttpRequest $request,
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int $count,
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int $range = 0,
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string $pageParam = 'page',
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int $firstPage = 1
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): Pagination {
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return self::fromPage(
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$count,
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(int)($request->getParam($pageParam, FILTER_SANITIZE_NUMBER_INT) ?? $firstPage),
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$range,
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$firstPage
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);
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}
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}
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