Merge pull request #39 from iFixit/add-psr-16-adapter

Add PSR16 adapter

composer.json

@@ -13,7 +13,8 @@
       }
    ],
    "require": {
-      "php": "^8.0"
+      "php": "^8.0",
+      "psr/simple-cache": "^3.0"
    },
    "autoload": {
       "psr-0": {"iFixit": "library/"}

library/iFixit/Matryoshka/PSR16Adapter.php

@@ -0,0 +1,64 @@
+<?php
+
+namespace iFixit\Matryoshka;
+
+use DateInterval;
+use DateTime;
+use Psr\SimpleCache\CacheInterface;
+
+class PSR16Adapter implements CacheInterface {
+   private Scope $scope;
+
+   public function __construct(Backend $backend, string $scopeName) {
+      $this->scope = new Scope($backend, $scopeName);
+   }
+
+   public function get(string $key, mixed $default = null): mixed {
+      return $this->scope->get($key) ?: $default;
+   }
+
+   public function set(string $key, mixed $value, null|int|DateInterval $ttl = null): bool {
+      return $this->scope->set($key, $value, $this->getSeconds($ttl));
+   }
+
+   public function delete(string $key): bool {
+      return $this->scope->delete($key);
+   }
+
+   public function clear(): bool {
+      return $this->scope->deleteScope();
+   }
+
+   public function getMultiple(iterable $keys, mixed $default = null): iterable {
+      /**
+       * @var array<string, mixed> $missed
+       * @var array<string, mixed> $found
+       */
+      [$found, $missed] = $this->scope->getMultiple([...$keys]);
+      $missedWithDefault = [];
+
+      foreach ($missed as $key => $_value) {
+         $missedWithDefault[$key] = $default;
+      }
+
+      return array_merge($missedWithDefault, $found);
+   }
+
+   public function setMultiple(iterable $values, null|int|DateInterval $ttl = null): bool {
+      return $this->scope->setMultiple([...$values], $this->getSeconds($ttl));
+   }
+
+   public function deleteMultiple(iterable $keys): bool {
+      return $this->scope->deleteMultiple([...$keys]);
+   }
+
+   public function has(string $key): bool {
+      $isMiss = $this->scope->get($key) === Backend::MISS;
+      return !$isMiss;
+   }
+
+   private function getSeconds(null|int|DateInterval $secs) {
+      $seconds = $secs instanceof DateInterval ? (new DateTime('@0'))->add($secs)->getTimestamp() : $secs;
+      return $seconds ?: 0;
+   }
+}