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| Name | Lines | Methods | CRAP | ||||
|---|---|---|---|---|---|---|---|
| __construct | 100.00% | 9 / 9 | 100.00% | 1 / 1 | 3 | ||
| generateLinks | 100.00% | 44 / 44 | 100.00% | 1 / 1 | 13 | ||
| toArray | 100.00% | 11 / 11 | 100.00% | 1 / 1 | 1 | ||
| 27 | class PaginationMetadata | |
| 28 | { | |
| 29 | private int $total; | |
| 30 | ||
| 31 | private int $count; | |
| 32 | ||
| 33 | private int $perPage; | |
| 34 | ||
| 35 | private int $currentPage; | |
| 36 | ||
| 37 | private int $totalPages; | |
| 38 | ||
| 39 | private int $offset; | |
| 40 | ||
| 41 | private bool $hasMore; | |
| 42 | ||
| 43 | private bool $hasPrevious; | |
| 44 | ||
| 45 | private array $links; | |
| 46 | ||
| 47 | /** | |
| 48 | * Constructor | |
| 49 | * | |
| 50 | * @param int $total Total number of items across all pages | |
| 51 | * @param PaginationRequest $request The pagination request | |
| 52 | * @param string $baseUrl Base URL for generating pagination links | |
| 53 | * @param int $actualCount Actual count of items in the current response | |
| 54 | */ | |
| 55 | public function __construct(int $total, PaginationRequest $request, string $baseUrl, int $actualCount = 0) | |
| 56 | { | |
| 57 | $this->total = max(0, $total); | |
| 58 | $this->perPage = $request->perPage; | |
| 59 | $this->currentPage = $request->page; | |
| 60 | $this->offset = $request->offset; | |
| 61 | $this->count = $actualCount > 0 ? $actualCount : min($this->perPage, max(0, $this->total - $this->offset)); | |
| 62 | ||
| 63 | // Calculate total pages (minimum 1 even for empty results) | |
| 64 | $this->totalPages = $this->perPage > 0 ? max(1, (int) ceil($this->total / $this->perPage)) : 1; | |
| 65 | ||
| 66 | // Calculate navigation flags | |
| 67 | $this->hasMore = $this->currentPage < $this->totalPages; | |
| 68 | $this->hasPrevious = $this->currentPage > 1; | |
| 69 | ||
| 70 | // Generate pagination links | |
| 71 | $this->links = $this->generateLinks($baseUrl, $request); | |
| 72 | } | |
| 73 | ||
| 74 | /** | |
| 75 | * Generates pagination links (first, last, prev, next) | |
| 76 | * | |
| 77 | * @param string $baseUrl Base URL for links | |
| 78 | * @param PaginationRequest $request The pagination request | |
| 79 | * @return array Links array | |
| 80 | */ | |
| 81 | private function generateLinks(string $baseUrl, PaginationRequest $request): array | |
| 82 | { | |
| 83 | // Parse existing query parameters from base URL | |
| 84 | $urlParts = parse_url($baseUrl); | |
| 85 | $basePath = $urlParts['path'] ?? ''; | |
| 86 | $queryParams = []; | |
| 87 | ||
| 88 | if (is_array($urlParts) && array_key_exists('query', $urlParts)) { | |
| 89 | parse_str($urlParts['query'], $queryParams); | |
| 90 | } | |
| 91 | ||
| 92 | // Remove pagination parameters to rebuild them | |
| 93 | unset($queryParams['page'], $queryParams['per_page'], $queryParams['limit'], $queryParams['offset']); | |
| 94 | ||
| 95 | $links = [ | |
| 96 | 'first' => null, | |
| 97 | 'last' => null, | |
| 98 | 'prev' => null, | |
| 99 | 'next' => null, | |
| 100 | ]; | |
| 101 | ||
| 102 | // Determine pagination style for links | |
| 103 | if ($request->isPageBased) { | |
| 104 | // Page-based links | |
| 105 | $queryParams['per_page'] = $this->perPage; | |
| 106 | ||
| 107 | // First page link | |
| 108 | if ($this->totalPages > 0) { | |
| 109 | $firstParams = array_merge($queryParams, ['page' => 1]); | |
| 110 | $links['first'] = $basePath . '?' . http_build_query($firstParams); | |
| 111 | } | |
| 112 | ||
| 113 | // Last page link | |
| 114 | if ($this->totalPages > 0) { | |
| 115 | $lastParams = array_merge($queryParams, ['page' => $this->totalPages]); | |
| 116 | $links['last'] = $basePath . '?' . http_build_query($lastParams); | |
| 117 | } | |
| 118 | ||
| 119 | // Previous page link | |
| 120 | if ($this->hasPrevious) { | |
| 121 | $prevParams = array_merge($queryParams, ['page' => $this->currentPage - 1]); | |
| 122 | $links['prev'] = $basePath . '?' . http_build_query($prevParams); | |
| 123 | } | |
| 124 | ||
| 125 | // Next page link | |
| 126 | if ($this->hasMore) { | |
| 127 | $nextParams = array_merge($queryParams, ['page' => $this->currentPage + 1]); | |
| 128 | $links['next'] = $basePath . '?' . http_build_query($nextParams); | |
| 129 | } | |
| 130 | } | |
| 131 | ||
| 132 | if (!$request->isPageBased) { | |
| 133 | // Offset-based links | |
| 134 | $queryParams['limit'] = $this->perPage; | |
| 135 | ||
| 136 | // First page link | |
| 137 | if ($this->totalPages > 0) { | |
| 138 | $firstParams = array_merge($queryParams, ['offset' => 0]); | |
| 139 | $links['first'] = $basePath . '?' . http_build_query($firstParams); | |
| 140 | } | |
| 141 | ||
| 142 | // Last page link | |
| 143 | if ($this->totalPages > 0) { | |
| 144 | $lastOffset = max(0, ($this->totalPages - 1) * $this->perPage); | |
| 145 | $lastParams = array_merge($queryParams, ['offset' => $lastOffset]); | |
| 146 | $links['last'] = $basePath . '?' . http_build_query($lastParams); | |
| 147 | } | |
| 148 | ||
| 149 | // Previous page link | |
| 150 | if ($this->hasPrevious) { | |
| 151 | $prevOffset = max(0, $this->offset - $this->perPage); | |
| 152 | $prevParams = array_merge($queryParams, ['offset' => $prevOffset]); | |
| 153 | $links['prev'] = $basePath . '?' . http_build_query($prevParams); | |
| 154 | } | |
| 155 | ||
| 156 | // Next page link | |
| 157 | if ($this->hasMore) { | |
| 158 | $nextOffset = $this->offset + $this->perPage; | |
| 159 | $nextParams = array_merge($queryParams, ['offset' => $nextOffset]); | |
| 160 | $links['next'] = $basePath . '?' . http_build_query($nextParams); | |
| 161 | } | |
| 162 | } | |
| 163 | ||
| 164 | return $links; | |
| 165 | } | |
| 166 | ||
| 167 | /** | |
| 168 | * Converts metadata to array format for API response | |
| 169 | * | |
| 170 | * @return array | |
| 171 | */ | |
| 172 | public function toArray(): array | |
| 173 | { | |
| 174 | return [ | |
| 175 | 'total' => $this->total, | |
| 176 | 'count' => $this->count, | |
| 177 | 'per_page' => $this->perPage, | |
| 178 | 'current_page' => $this->currentPage, | |
| 179 | 'total_pages' => $this->totalPages, | |
| 180 | 'offset' => $this->offset, | |
| 181 | 'has_more' => $this->hasMore, | |
| 182 | 'has_previous' => $this->hasPrevious, | |
| 183 | 'links' => $this->links, | |
| 184 | ]; | |
| 185 | } | |
| 186 | } |