Add Cache, Session, and File credential providers

src/Providers/CacheCredentialProvider.php

···
+<?php
+
+namespace SocialDept\AtpClient\Providers;
+
+use Illuminate\Support\Facades\Cache;
+use SocialDept\AtpClient\Contracts\CredentialProvider;
+use SocialDept\AtpClient\Data\AccessToken;
+use SocialDept\AtpClient\Data\Credentials;
+
+class CacheCredentialProvider implements CredentialProvider
+{
+    protected string $prefix = 'atp:credentials:';
+
+    public function getCredentials(string $did): ?Credentials
+    {
+        return Cache::get($this->key($did));
+    }
+
+    public function storeCredentials(string $did, AccessToken $token): void
+    {
+        Cache::put($this->key($did), $this->toCredentials($token));
+    }
+
+    public function updateCredentials(string $did, AccessToken $token): void
+    {
+        $this->storeCredentials($did, $token);
+    }
+
+    public function removeCredentials(string $did): void
+    {
+        Cache::forget($this->key($did));
+    }
+
+    protected function key(string $did): string
+    {
+        return $this->prefix.$did;
+    }
+
+    protected function toCredentials(AccessToken $token): Credentials
+    {
+        return new Credentials(
+            did: $token->did,
+            accessToken: $token->accessJwt,
+            refreshToken: $token->refreshJwt,
+            expiresAt: $token->expiresAt,
+            handle: $token->handle,
+            issuer: $token->issuer,
+            scope: $token->scope,
+            authType: $token->authType,
+        );
+    }
+}

src/Providers/FileCredentialProvider.php

···
+<?php
+
+namespace SocialDept\AtpClient\Providers;
+
+use SocialDept\AtpClient\Contracts\CredentialProvider;
+use SocialDept\AtpClient\Data\AccessToken;
+use SocialDept\AtpClient\Data\Credentials;
+
+class FileCredentialProvider implements CredentialProvider
+{
+    protected string $storagePath;
+
+    public function __construct(?string $storagePath = null)
+    {
+        $this->storagePath = $storagePath ?? storage_path('app/atp-credentials');
+
+        if (! is_dir($this->storagePath)) {
+            mkdir($this->storagePath, 0755, true);
+        }
+    }
+
+    public function getCredentials(string $did): ?Credentials
+    {
+        $path = $this->path($did);
+
+        if (! file_exists($path)) {
+            return null;
+        }
+
+        return unserialize(file_get_contents($path));
+    }
+
+    public function storeCredentials(string $did, AccessToken $token): void
+    {
+        file_put_contents($this->path($did), serialize($this->toCredentials($token)));
+    }
+
+    public function updateCredentials(string $did, AccessToken $token): void
+    {
+        $this->storeCredentials($did, $token);
+    }
+
+    public function removeCredentials(string $did): void
+    {
+        $path = $this->path($did);
+
+        if (file_exists($path)) {
+            unlink($path);
+        }
+    }
+
+    protected function path(string $did): string
+    {
+        return $this->storagePath.'/'.hash('sha256', $did).'.cred';
+    }
+
+    protected function toCredentials(AccessToken $token): Credentials
+    {
+        return new Credentials(
+            did: $token->did,
+            accessToken: $token->accessJwt,
+            refreshToken: $token->refreshJwt,
+            expiresAt: $token->expiresAt,
+            handle: $token->handle,
+            issuer: $token->issuer,
+            scope: $token->scope,
+            authType: $token->authType,
+        );
+    }
+}

src/Providers/SessionCredentialProvider.php

···
+<?php
+
+namespace SocialDept\AtpClient\Providers;
+
+use Illuminate\Support\Facades\Session;
+use SocialDept\AtpClient\Contracts\CredentialProvider;
+use SocialDept\AtpClient\Data\AccessToken;
+use SocialDept\AtpClient\Data\Credentials;
+
+class SessionCredentialProvider implements CredentialProvider
+{
+    protected string $prefix = 'atp.credentials.';
+
+    public function getCredentials(string $did): ?Credentials
+    {
+        return Session::get($this->key($did));
+    }
+
+    public function storeCredentials(string $did, AccessToken $token): void
+    {
+        Session::put($this->key($did), $this->toCredentials($token));
+    }
+
+    public function updateCredentials(string $did, AccessToken $token): void
+    {
+        $this->storeCredentials($did, $token);
+    }
+
+    public function removeCredentials(string $did): void
+    {
+        Session::forget($this->key($did));
+    }
+
+    protected function key(string $did): string
+    {
+        return $this->prefix.$did;
+    }
+
+    protected function toCredentials(AccessToken $token): Credentials
+    {
+        return new Credentials(
+            did: $token->did,
+            accessToken: $token->accessJwt,
+            refreshToken: $token->refreshJwt,
+            expiresAt: $token->expiresAt,
+            handle: $token->handle,
+            issuer: $token->issuer,
+            scope: $token->scope,
+            authType: $token->authType,
+        );
+    }
+}