118 lines
3.2 KiB
PHP
118 lines
3.2 KiB
PHP
<?php
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namespace lib\Core\Utils;
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class Pagination
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{
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public int $currentPage;
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public int $perPage;
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public int $totalItems;
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public int $totalPages;
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public int $groupSize = 10;
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public int $start;
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public int $end;
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public function __construct(int $totalItems, int $currentPage = 1, int $perPage = 10)
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{
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$this->totalItems = $totalItems;
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$this->perPage = $perPage;
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$this->currentPage = max(1, $currentPage);
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$this->totalPages = (int)ceil($totalItems / $perPage);
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$this->start = ($this->currentPage - 1) * $perPage;
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$this->end = min($this->start + $perPage, $totalItems);
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$this->groupSize = intval(VIEW_LIST_PAGINATION_GROUPSIZE);
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}
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public function hasPrevious(): bool
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{
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return $this->currentPage > 1;
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}
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public function hasNext(): bool
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{
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return $this->currentPage < $this->totalPages;
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}
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public function previousPage(): int
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{
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return max(1, $this->currentPage - 1);
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}
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public function nextPage(): int
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{
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return min($this->totalPages, $this->currentPage + 1);
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}
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public function getOffset(): int
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{
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return $this->start;
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}
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public function getLimit(): int
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{
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return $this->perPage;
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}
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public function toArray(): array
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{
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return [
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'current_page' => $this->currentPage,
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'per_page' => $this->perPage,
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'total_items' => $this->totalItems,
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'total_pages' => $this->totalPages,
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'has_previous' => $this->hasPrevious(),
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'has_next' => $this->hasNext(),
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'previous_page' => $this->previousPage(),
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'next_page' => $this->nextPage(),
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'offset' => $this->getOffset(),
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'limit' => $this->getLimit(),
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];
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}
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public function render(string $baseUrl = '', array $query = []): string
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{
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if ($this->totalPages <= 1) {
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return '';
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}
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$html = '<nav><ul class="pagination">';
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$currentGroup = (int)floor(($this->currentPage - 1) / $this->groupSize);
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$startPage = $currentGroup * $this->groupSize + 1;
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$endPage = min($startPage + $this->groupSize - 1, $this->totalPages);
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// << 그룹 이전
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if ($startPage > 1) {
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$prevGroupPage = max(1, $startPage - 1);
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$html .= $this->pageLink($prevGroupPage, '«', $baseUrl, $query);
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} else {
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$html .= '<li class="page-item disabled"><span class="page-link">«</span></li>';
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}
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// 페이지 번호들
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for ($i = $startPage; $i <= $endPage; $i++) {
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if ($i === $this->currentPage) {
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$html .= '<li class="page-item active"><span class="page-link">' . $i . '</span></li>';
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} else {
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$html .= $this->pageLink($i, (string)$i, $baseUrl, $query);
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}
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}
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// >> 그룹 다음
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if ($endPage < $this->totalPages) {
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$nextGroupPage = $endPage + 1;
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$html .= $this->pageLink($nextGroupPage, '»', $baseUrl, $query);
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} else {
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$html .= '<li class="page-item disabled"><span class="page-link">»</span></li>';
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}
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$html .= '</ul></nav>';
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return $html;
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}
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private function pageLink(int $page, string $label, string $baseUrl, array $query): string
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{
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$query['curPage'] = $page;
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$url = $baseUrl . '?' . http_build_query($query);
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return '<li class="page-item"><a class="page-link" href="' . htmlspecialchars($url) . '">' . $label . '</a></li>';
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}
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}
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