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| 1 | <?php |
| 2 | /** |
| 3 | * Pop PHP Framework (https://www.popphp.org/) |
| 4 | * |
| 5 | * @link https://github.com/popphp/popphp-framework |
| 6 | * @author Nick Sagona, III <dev@noladev.com> |
| 7 | * @copyright Copyright (c) 2009-2026 NOLA Interactive, LLC. |
| 8 | * @license https://www.popphp.org/license New BSD License |
| 9 | */ |
| 10 | |
| 11 | /** |
| 12 | * @namespace |
| 13 | */ |
| 14 | namespace Pop\Paginator; |
| 15 | |
| 16 | /** |
| 17 | * Abstract paginator type class |
| 18 | * |
| 19 | * @category Pop |
| 20 | * @package Pop\Paginator |
| 21 | * @author Nick Sagona, III <dev@noladev.com> |
| 22 | * @copyright Copyright (c) 2009-2026 NOLA Interactive, LLC. |
| 23 | * @license https://www.popphp.org/license New BSD License |
| 24 | * @version 4.0.3 |
| 25 | */ |
| 26 | abstract class AbstractPaginator implements PaginatorInterface |
| 27 | { |
| 28 | |
| 29 | /** |
| 30 | * Total number of items |
| 31 | * @var int |
| 32 | */ |
| 33 | protected int $total = 0; |
| 34 | |
| 35 | /** |
| 36 | * Number of items per page |
| 37 | * @var int |
| 38 | */ |
| 39 | protected int $perPage = 10; |
| 40 | |
| 41 | /** |
| 42 | * Range of pages per page |
| 43 | * @var int |
| 44 | */ |
| 45 | protected int $range = 10; |
| 46 | |
| 47 | /** |
| 48 | * Query key |
| 49 | * @var string |
| 50 | */ |
| 51 | protected string $queryKey = 'page'; |
| 52 | |
| 53 | /** |
| 54 | * Current page property |
| 55 | * @var int |
| 56 | */ |
| 57 | protected int $currentPage = 1; |
| 58 | |
| 59 | /** |
| 60 | * Number of pages property |
| 61 | * @var ?int |
| 62 | */ |
| 63 | protected ?int $numberOfPages = null; |
| 64 | |
| 65 | /** |
| 66 | * Current page start index property |
| 67 | * @var ?int |
| 68 | */ |
| 69 | protected ?int $start = null; |
| 70 | |
| 71 | /** |
| 72 | * Current page end index property |
| 73 | * @var ?int |
| 74 | */ |
| 75 | protected ?int $end = null; |
| 76 | |
| 77 | /** |
| 78 | * Page bookends |
| 79 | * @var array |
| 80 | */ |
| 81 | protected array $bookends = [ |
| 82 | 'start' => '«', |
| 83 | 'previous' => '‹', |
| 84 | 'next' => '›', |
| 85 | 'end' => '»' |
| 86 | ]; |
| 87 | |
| 88 | /** |
| 89 | * Constructor |
| 90 | * |
| 91 | * Instantiate the paginator object |
| 92 | * |
| 93 | * @param int $total |
| 94 | * @param int $perPage |
| 95 | * @param int $range |
| 96 | */ |
| 97 | public function __construct(int $total, int $perPage = 10, int $range = 10) |
| 98 | { |
| 99 | $this->total = $total; |
| 100 | $this->perPage = $perPage; |
| 101 | $this->range = $range; |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * Set the query key |
| 106 | * |
| 107 | * @param string $key |
| 108 | * @return AbstractPaginator |
| 109 | */ |
| 110 | public function setQueryKey(string $key): AbstractPaginator |
| 111 | { |
| 112 | $this->queryKey = $key; |
| 113 | return $this; |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Set the bookends |
| 118 | * |
| 119 | * @param array $bookends |
| 120 | * @return AbstractPaginator |
| 121 | */ |
| 122 | public function setBookends(array $bookends): AbstractPaginator |
| 123 | { |
| 124 | if (array_key_exists('start', $bookends)) { |
| 125 | $this->bookends['start'] = $bookends['start']; |
| 126 | } |
| 127 | if (array_key_exists('previous', $bookends)) { |
| 128 | $this->bookends['previous'] = $bookends['previous']; |
| 129 | } |
| 130 | if (array_key_exists('next', $bookends)) { |
| 131 | $this->bookends['next'] = $bookends['next']; |
| 132 | } |
| 133 | if (array_key_exists('end', $bookends)) { |
| 134 | $this->bookends['end'] = $bookends['end']; |
| 135 | } |
| 136 | |
| 137 | return $this; |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Get the content items total |
| 142 | * |
| 143 | * @return int |
| 144 | */ |
| 145 | public function getTotal(): int |
| 146 | { |
| 147 | return $this->total; |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Get the per page |
| 152 | * |
| 153 | * @return int |
| 154 | */ |
| 155 | public function getPerPage(): int |
| 156 | { |
| 157 | return $this->perPage; |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Get the page range |
| 162 | * |
| 163 | * @return int |
| 164 | */ |
| 165 | public function getRange(): int |
| 166 | { |
| 167 | return $this->range; |
| 168 | } |
| 169 | |
| 170 | /** |
| 171 | * Get the query key |
| 172 | * |
| 173 | * @return string |
| 174 | */ |
| 175 | public function getQueryKey(): string |
| 176 | { |
| 177 | return $this->queryKey; |
| 178 | } |
| 179 | |
| 180 | /** |
| 181 | * Get the current page |
| 182 | * |
| 183 | * @return int |
| 184 | */ |
| 185 | public function getCurrentPage(): int |
| 186 | { |
| 187 | return $this->currentPage; |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * Get the number of pages |
| 192 | * |
| 193 | * @return int |
| 194 | */ |
| 195 | public function getNumberOfPages(): int |
| 196 | { |
| 197 | return $this->numberOfPages; |
| 198 | } |
| 199 | |
| 200 | /** |
| 201 | * Get a bookend |
| 202 | * |
| 203 | * @param string $key |
| 204 | * @return string|null |
| 205 | */ |
| 206 | public function getBookend(string $key): string|null |
| 207 | { |
| 208 | return $this->bookends[$key] ?? null; |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * Get the bookends |
| 213 | * |
| 214 | * @return array |
| 215 | */ |
| 216 | public function getBookends(): array |
| 217 | { |
| 218 | return $this->bookends; |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * Calculate the page range |
| 223 | * |
| 224 | * @param int $page |
| 225 | * @return array |
| 226 | */ |
| 227 | public function calculateRange(int $page = 1): array |
| 228 | { |
| 229 | $this->currentPage = $page; |
| 230 | |
| 231 | // Calculate the number of pages based on the remainder. |
| 232 | $remainder = $this->total % $this->perPage; |
| 233 | $this->numberOfPages = ($remainder != 0) ? (floor(($this->total / $this->perPage)) + 1) : |
| 234 | floor(($this->total / $this->perPage)); |
| 235 | |
| 236 | // Calculate the start index. |
| 237 | $this->start = ($page * $this->perPage) - $this->perPage; |
| 238 | |
| 239 | // Calculate the end index. |
| 240 | if (($page == $this->numberOfPages) && ($remainder == 0)) { |
| 241 | $this->end = $this->start + $this->perPage; |
| 242 | } else if ($page == $this->numberOfPages) { |
| 243 | $this->end = (($page * $this->perPage) - ($this->perPage - $remainder)); |
| 244 | } else { |
| 245 | $this->end = ($page * $this->perPage); |
| 246 | } |
| 247 | |
| 248 | // Calculate if out of range. |
| 249 | if ($this->start >= $this->total) { |
| 250 | $this->start = 0; |
| 251 | $this->end = $this->perPage; |
| 252 | } |
| 253 | |
| 254 | // Check and calculate for any page ranges. |
| 255 | if ((($this->range === null) || ($this->range > $this->numberOfPages)) && ($this->total === null)) { |
| 256 | $range = [ |
| 257 | 'start' => 1, |
| 258 | 'end' => $this->numberOfPages, |
| 259 | 'prev' => false, |
| 260 | 'next' => false |
| 261 | ]; |
| 262 | } else { |
| 263 | // If page is within the first range block. |
| 264 | if (($page <= $this->range) && ($this->numberOfPages <= $this->range)) { |
| 265 | $range = [ |
| 266 | 'start' => 1, |
| 267 | 'end' => $this->numberOfPages, |
| 268 | 'prev' => false, |
| 269 | 'next' => false |
| 270 | ]; |
| 271 | // If page is within the first range block, with a next range. |
| 272 | } else if (($page <= $this->range) && ($this->numberOfPages > $this->range)) { |
| 273 | $range = [ |
| 274 | 'start' => 1, |
| 275 | 'end' => $this->range, |
| 276 | 'prev' => false, |
| 277 | 'next' => true |
| 278 | ]; |
| 279 | // Else, if page is within the last range block, with an uneven remainder. |
| 280 | } else if ($page > ($this->range * floor($this->numberOfPages / $this->range))) { |
| 281 | $range = [ |
| 282 | 'start' => ($this->range * floor($this->numberOfPages / $this->range)) + 1, |
| 283 | 'end' => $this->numberOfPages, |
| 284 | 'prev' => true, |
| 285 | 'next' => false |
| 286 | ]; |
| 287 | // Else, if page is within the last range block, with no remainder. |
| 288 | } else if ((($this->numberOfPages % $this->range) == 0) && ($page > ($this->range * (($this->numberOfPages / $this->range) - 1)))) { |
| 289 | $range = [ |
| 290 | 'start' => ($this->range * (($this->numberOfPages / $this->range) - 1)) + 1, |
| 291 | 'end' => $this->numberOfPages, |
| 292 | 'prev' => true, |
| 293 | 'next' => false |
| 294 | ]; |
| 295 | // Else, if page is within a middle range block. |
| 296 | } else { |
| 297 | $posInRange = (($page % $this->range) == 0) ? ($this->range - 1) : (($page % $this->range) - 1); |
| 298 | $linkStart = $page - $posInRange; |
| 299 | $range = [ |
| 300 | 'start' => $linkStart, |
| 301 | 'end' => $linkStart + ($this->range - 1), |
| 302 | 'prev' => true, |
| 303 | 'next' => true |
| 304 | ]; |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | return $range; |
| 309 | } |
| 310 | |
| 311 | } |