Rewrite cached resolver logic to allow for cache invalidation logic

src/Resolvers/Contracts/CachedTenantResolver.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace Stancl\Tenancy\Resolvers\Contracts;
+
+use Illuminate\Contracts\Cache\Factory;
+use Illuminate\Contracts\Cache\Repository;
+use Stancl\Tenancy\Contracts\Tenant;
+use Stancl\Tenancy\Contracts\TenantResolver;
+use Stancl\Tenancy\Database\Models\Domain;
+use Stancl\Tenancy\Resolvers\DomainTenantResolver;
+
+abstract class CachedTenantResolver implements TenantResolver
+{
+    /** @var bool */
+    public static $shouldCache = false;
+
+    /** @var int */
+    public static $cacheTTL = 3600; // seconds
+
+    /** @var string|null */
+    public static $cacheStore = null; // default
+
+    /** @var Repository */
+    protected $cache;
+
+    public function __construct(Factory $cache)
+    {
+        $this->cache = $cache->store(static::$cacheStore);
+    }
+
+    public function resolve(...$args): Tenant
+    {
+        if (! static::$shouldCache) {
+            return $this->resolveWithoutCache(...$args);
+        }
+
+        $key = $this->getCacheKey(...$args);
+
+        if ($this->cache->has($key)) {
+            return $this->cache->get($key);
+        }
+
+        $tenant = $this->resolveWithoutCache(...$args);
+        $this->cache->put($key, $tenant, static::$cacheTTL);
+
+        return $tenant;
+    }
+
+    public function invalidateCache(Tenant $tenant): void
+    {
+        foreach ($this->getArgsForTenant($tenant) as $args) {
+            $this->cache->forget($this->getCacheKey(...$args));
+        }
+    }
+
+    public function getCacheKey(...$args): string
+    {
+        return '_tenancy_resolver:' . static::class . ':' . json_encode($args);
+    }
+
+    abstract public function resolveWithoutCache(...$args): Tenant;
+
+    /**
+     * Get all the arg combinations for resolve() that can be used to find this tenant.
+     *
+     * @param Tenant $tenant
+     * @return array[]
+     */
+    abstract public function getArgsForTenant(Tenant $tenant): array;
+}