feat: Add method ConfigClient::toToml()

Author: roxblnfk

composer.json

@@ -61,7 +61,7 @@
         "dereuromark/composer-prefer-lowest": "^0.1.10",
         "doctrine/annotations": "^1.14.4 || ^2.0.2",
         "internal/dload": "^1.2.0",
-        "internal/toml": "^1.0",
+        "internal/toml": "^1.0.3",
         "jetbrains/phpstorm-attributes": "dev-master",
         "laminas/laminas-code": "^4.16",
         "phpunit/phpunit": "10.5.45",

src/Common/EnvConfig/Client/ConfigToml.php

@@ -62,6 +62,18 @@ public static function fromString(string $toml): self
         return new self(self::parseProfiles($data['profile'] ?? []));
     }
 
+    /**
+     * Convert the configuration back to TOML string.
+     *
+     * @return string TOML representation of the configuration
+     */
+    public function toToml(): string
+    {
+        return (string) Toml::encode([
+            'profile' => \array_map(self::encodeProfile(...), $this->profiles),
+        ]);
+    }
+
     /**
      * Assert a condition and throw an exception if it fails.
      *
@@ -173,4 +185,48 @@ private static function parseCodec(array $codec): ?ConfigCodec
             auth: $auth,
         );
     }
+
+    private static function encodeProfile(ConfigProfile $profile): array
+    {
+        $result = [];
+        $profile->address === null or $result['address'] = $profile->address;
+        $profile->namespace === null or $result['namespace'] = $profile->namespace;
+        $profile->apiKey === null or $result['api_key'] = (string) $profile->apiKey;
+        $profile->tlsConfig === null or $result['tls'] = self::encodeTls($profile->tlsConfig);
+        $profile->grpcMeta === [] or $result['grpc_meta'] = $profile->grpcMeta;
+        $profile->codecConfig === null or $result['codec'] = self::encodeCodec($profile->codecConfig);
+        return $result;
+    }
+
+    private static function encodeTls(ConfigTls $config): array
+    {
+        $result = [];
+        $config->disabled === null or $result['disabled'] = $config->disabled;
+        $config->rootCerts === null or self::isCertFile($config->rootCerts)
+            ? $result['server_ca_cert_path'] = $config->rootCerts
+            : $result['server_ca_cert_data'] = $config->rootCerts;
+        $config->privateKey === null or self::isCertFile($config->privateKey)
+            ? $result['client_key_path'] = $config->privateKey
+            : $result['client_key_data'] = $config->privateKey;
+        $config->certChain === null or self::isCertFile($config->certChain)
+            ? $result['client_cert_path'] = $config->certChain
+            : $result['client_cert_data'] = $config->certChain;
+        $config->serverName === null or $result['server_name'] = $config->serverName;
+        return $result;
+    }
+
+    private static function isCertFile(string $certOrPath): bool
+    {
+        return \str_starts_with($certOrPath, '/')
+            || \str_starts_with($certOrPath, './')
+            || \str_starts_with($certOrPath, '../');
+    }
+
+    private static function encodeCodec(ConfigCodec $config): array
+    {
+        $result = [];
+        $config->endpoint === null or $result['endpoint'] = $config->endpoint;
+        $config->auth === null or $result['auth'] = $config->auth;
+        return $result;
+    }
 }

src/Common/EnvConfig/ConfigClient.php

@@ -4,6 +4,7 @@
 
 namespace Temporal\Common\EnvConfig;
 
+use Internal\Toml\Toml;
 use Temporal\Common\EnvConfig\Client\ConfigEnv;
 use Temporal\Common\EnvConfig\Client\ConfigProfile;
 use Temporal\Common\EnvConfig\Client\ConfigToml;
@@ -33,7 +34,7 @@
 final class ConfigClient
 {
     /**
-     * @param array<lowercase-string, ConfigProfile> $profiles Profile configurations keyed by lowercase name
+     * @param array<non-empty-lowercase-string, ConfigProfile> $profiles Profile configurations keyed by lowercase name
      */
     private function __construct(
         public readonly array $profiles,
@@ -147,6 +148,18 @@ public static function loadFromToml(string $source): self
         }
     }
 
+    /**
+     * Serialize the client configuration back to TOML format.
+     *
+     * @return non-empty-string TOML representation of the configuration
+     */
+    public function toToml(): string
+    {
+        return (new ConfigToml(
+            profiles: $this->profiles,
+        ))->toToml();
+    }
+
     /**
      * Get a profile by name (case-insensitive).
      *