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| 1 | <?php |
| 2 | declare(strict_types=1); |
| 3 | /** |
| 4 | * Pop PHP Framework (https://www.popphp.org/) |
| 5 | * |
| 6 | * @link https://github.com/popphp/popphp-framework |
| 7 | * @author Nick Sagona, III <nick@popphp.org> |
| 8 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 9 | * @license https://www.popphp.org/license New BSD License |
| 10 | */ |
| 11 | |
| 12 | /** |
| 13 | * @namespace |
| 14 | */ |
| 15 | namespace Pop\Cache\Adapter; |
| 16 | |
| 17 | /** |
| 18 | * Memory adapter cache class |
| 19 | * |
| 20 | * @category Pop |
| 21 | * @package Pop\Cache |
| 22 | * @author Nick Sagona, III <nick@popphp.org> |
| 23 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 24 | * @license https://www.popphp.org/license New BSD License |
| 25 | * @version 5.0.0 |
| 26 | */ |
| 27 | class Memory extends AbstractAdapter |
| 28 | { |
| 29 | |
| 30 | /** |
| 31 | * Cached items, keyed by sha1($id) |
| 32 | * @var array |
| 33 | */ |
| 34 | protected array $items = []; |
| 35 | |
| 36 | /** |
| 37 | * Get the time-to-live for an item in cache |
| 38 | * |
| 39 | * @param string $id |
| 40 | * @param int $default |
| 41 | * @return int |
| 42 | */ |
| 43 | public function getItemTtl(string $id, int $default = 0): int |
| 44 | { |
| 45 | $key = sha1($id); |
| 46 | $ttl = $default; |
| 47 | |
| 48 | if (isset($this->items[$key])) { |
| 49 | $ttl = $this->items[$key]['ttl']; |
| 50 | } |
| 51 | |
| 52 | return $ttl; |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Save an item to cache |
| 57 | * |
| 58 | * @param string $id |
| 59 | * @param mixed $value |
| 60 | * @param ?int $ttl |
| 61 | * @return Memory |
| 62 | */ |
| 63 | public function saveItem(string $id, mixed $value, ?int $ttl = null): Memory |
| 64 | { |
| 65 | $this->items[sha1($id)] = [ |
| 66 | 'start' => $this->clock->now(), |
| 67 | 'ttl' => ($ttl !== null) ? $ttl : $this->ttl, |
| 68 | 'value' => $value |
| 69 | ]; |
| 70 | |
| 71 | return $this; |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Get an item from cache |
| 76 | * |
| 77 | * @param string $id |
| 78 | * @param mixed $default |
| 79 | * @return mixed |
| 80 | */ |
| 81 | public function getItem(string $id, mixed $default = false): mixed |
| 82 | { |
| 83 | $key = sha1($id); |
| 84 | $value = $default; |
| 85 | |
| 86 | if (isset($this->items[$key])) { |
| 87 | $cacheValue = $this->items[$key]; |
| 88 | if ($this->isFresh($cacheValue)) { |
| 89 | $value = $cacheValue['value']; |
| 90 | } else { |
| 91 | $this->deleteItem($id); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | return $value; |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * Determine if the item exist in cache |
| 100 | * |
| 101 | * @param string $id |
| 102 | * @return bool |
| 103 | */ |
| 104 | public function hasItem(string $id): bool |
| 105 | { |
| 106 | $key = sha1($id); |
| 107 | $result = false; |
| 108 | |
| 109 | if (isset($this->items[$key])) { |
| 110 | $cacheValue = $this->items[$key]; |
| 111 | $result = $this->isFresh($cacheValue); |
| 112 | } |
| 113 | |
| 114 | return $result; |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Delete a value in cache |
| 119 | * |
| 120 | * @param string $id |
| 121 | * @return Memory |
| 122 | */ |
| 123 | public function deleteItem(string $id): Memory |
| 124 | { |
| 125 | unset($this->items[sha1($id)]); |
| 126 | return $this; |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Clear all stored values from cache |
| 131 | * |
| 132 | * @return Memory |
| 133 | */ |
| 134 | public function clear(): Memory |
| 135 | { |
| 136 | $this->items = []; |
| 137 | return $this; |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Destroy cache resource |
| 142 | * |
| 143 | * @return Memory |
| 144 | */ |
| 145 | public function destroy(): Memory |
| 146 | { |
| 147 | $this->clear(); |
| 148 | return $this; |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * Atomically increment a counter in cache, creating it at $initial if it doesn't exist |
| 153 | * |
| 154 | * Non-atomic read-modify-write through the same start/ttl/value envelope used by saveItem()/getItem() — |
| 155 | * Memory has no native atomic primitive, so a counter here is an ordinary cached integer, fully |
| 156 | * interoperable with getItem()/hasItem()/deleteItem(). |
| 157 | * |
| 158 | * @param string $id |
| 159 | * @param int $amount |
| 160 | * @param int $initial |
| 161 | * @param ?int $ttl |
| 162 | * @throws Exception |
| 163 | * @return int |
| 164 | */ |
| 165 | public function incrementItem(string $id, int $amount = 1, int $initial = 0, ?int $ttl = null): int |
| 166 | { |
| 167 | $current = $this->getItem($id, $initial); |
| 168 | |
| 169 | if (!is_int($current)) { |
| 170 | throw new Exception('Error: The value at that key is not numeric.'); |
| 171 | } |
| 172 | |
| 173 | $value = $current + $amount; |
| 174 | $this->saveItem($id, $value, $ttl); |
| 175 | |
| 176 | return $value; |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * Atomically decrement a counter in cache, creating it at $initial if it doesn't exist |
| 181 | * |
| 182 | * Non-atomic read-modify-write through the same start/ttl/value envelope used by saveItem()/getItem() — |
| 183 | * Memory has no native atomic primitive, so a counter here is an ordinary cached integer, fully |
| 184 | * interoperable with getItem()/hasItem()/deleteItem(). |
| 185 | * |
| 186 | * @param string $id |
| 187 | * @param int $amount |
| 188 | * @param int $initial |
| 189 | * @param ?int $ttl |
| 190 | * @throws Exception |
| 191 | * @return int |
| 192 | */ |
| 193 | public function decrementItem(string $id, int $amount = 1, int $initial = 0, ?int $ttl = null): int |
| 194 | { |
| 195 | $current = $this->getItem($id, $initial); |
| 196 | |
| 197 | if (!is_int($current)) { |
| 198 | throw new Exception('Error: The value at that key is not numeric.'); |
| 199 | } |
| 200 | |
| 201 | $value = $current - $amount; |
| 202 | $this->saveItem($id, $value, $ttl); |
| 203 | |
| 204 | return $value; |
| 205 | } |
| 206 | |
| 207 | } |