feat!: simplify credentials callback usage

Author: JKRhb

README.md

@@ -46,7 +46,7 @@ To do so, a Thing Description JSON string is first parsed and turned into a
 import 'package:dart_wot/dart_wot.dart';
 
 Future<void> main(List<String> args) async {
-  final CoapClientFactory coapClientFactory = CoapClientFactory(null);
+  final CoapClientFactory coapClientFactory = CoapClientFactory();
   final servient = Servient()..addClientFactory(coapClientFactory);
   final wot = await servient.start();
 

example/coaps_readproperty.dart

@@ -30,14 +30,12 @@ PskCredentials? _pskCredentialsCallback(
 
 Future<void> main(List<String> args) async {
   final CoapClientFactory coapClientFactory = CoapClientFactory(
-    CoapConfig(
+    coapConfig: const CoapConfig(
       dtlsCiphers: 'PSK-AES128-CCM8',
     ),
+    pskCredentialsCallback: _pskCredentialsCallback,
   );
-  final securityProvider =
-      ClientSecurityProvider(pskCredentialsCallback: _pskCredentialsCallback);
-  final servient = Servient(clientSecurityProvider: securityProvider)
-    ..addClientFactory(coapClientFactory);
+  final servient = Servient()..addClientFactory(coapClientFactory);
 
   final wot = await servient.start();
 

example/complex_example.dart

@@ -112,13 +112,13 @@ Future<BasicCredentials?> basicCredentialsCallback(
 }
 
 Future<void> main() async {
-  final coapConfig = CoapConfig(blocksize: 64);
-  final CoapClientFactory coapClientFactory = CoapClientFactory(coapConfig);
-  final HttpClientFactory httpClientFactory = HttpClientFactory();
-  final securityProvider = ClientSecurityProvider(
-    basicCredentialsCallback: basicCredentialsCallback,
+  const coapConfig = CoapConfig(blocksize: 64);
+  final CoapClientFactory coapClientFactory = CoapClientFactory(
+    coapConfig: coapConfig,
   );
-  final servient = Servient(clientSecurityProvider: securityProvider)
+  final HttpClientFactory httpClientFactory =
+      HttpClientFactory(basicCredentialsCallback: basicCredentialsCallback);
+  final servient = Servient()
     ..addClientFactory(coapClientFactory)
     ..addClientFactory(httpClientFactory);
   final wot = await servient.start();

example/example.dart

@@ -24,13 +24,10 @@ Future<BasicCredentials?> basicCredentialsCallback(
 
 Future<void> main(List<String> args) async {
   final CoapClientFactory coapClientFactory = CoapClientFactory();
-  final HttpClientFactory httpClientFactory = HttpClientFactory();
+  final HttpClientFactory httpClientFactory =
+      HttpClientFactory(basicCredentialsCallback: basicCredentialsCallback);
   final MqttClientFactory mqttClientFactory = MqttClientFactory();
-  final servient = Servient(
-    clientSecurityProvider: ClientSecurityProvider(
-      basicCredentialsCallback: basicCredentialsCallback,
-    ),
-  )
+  final servient = Servient()
     ..addClientFactory(coapClientFactory)
     ..addClientFactory(httpClientFactory)
     ..addClientFactory(mqttClientFactory);

example/http_basic_authentication.dart

@@ -68,12 +68,9 @@ Future<BasicCredentials?> basicCredentialsCallback(
 /// Illustrates the usage of both the basic and the automatic security scheme,
 /// with a server supporting basic authentication.
 Future<void> main(List<String> args) async {
-  final HttpClientFactory httpClientFactory = HttpClientFactory();
-  final securityProvider = ClientSecurityProvider(
-    basicCredentialsCallback: basicCredentialsCallback,
-  );
-  final servient = Servient(clientSecurityProvider: securityProvider)
-    ..addClientFactory(httpClientFactory);
+  final HttpClientFactory httpClientFactory =
+      HttpClientFactory(basicCredentialsCallback: basicCredentialsCallback);
+  final servient = Servient()..addClientFactory(httpClientFactory);
   final wot = await servient.start();
 
   final thingDescription = ThingDescription(thingDescriptionJson);

lib/core.dart

@@ -17,12 +17,12 @@ export 'src/core/credentials/ace_credentials.dart';
 export 'src/core/credentials/apikey_credentials.dart';
 export 'src/core/credentials/basic_credentials.dart';
 export 'src/core/credentials/bearer_credentials.dart';
+export 'src/core/credentials/callbacks.dart';
 export 'src/core/credentials/credentials.dart';
 export 'src/core/credentials/digest_credentials.dart';
 export 'src/core/credentials/oauth2_credentials.dart';
 export 'src/core/credentials/psk_credentials.dart';
 export 'src/core/protocol_interfaces/protocol_client.dart';
 export 'src/core/protocol_interfaces/protocol_client_factory.dart';
 export 'src/core/protocol_interfaces/protocol_server.dart';
-export 'src/core/security_provider.dart';
 export 'src/core/servient.dart';

lib/src/binding_coap/coap_client.dart

@@ -13,9 +13,9 @@ import 'package:dcaf/dcaf.dart';
 
 import '../core/content.dart';
 import '../core/credentials/ace_credentials.dart';
+import '../core/credentials/callbacks.dart';
 import '../core/credentials/psk_credentials.dart';
 import '../core/protocol_interfaces/protocol_client.dart';
-import '../core/security_provider.dart';
 import '../definitions/form.dart';
 import '../definitions/operation_type.dart';
 import '../scripting_api/subscription.dart';
@@ -52,11 +52,10 @@ class _InternalCoapConfig extends CoapConfigDefault {
 
 coap.PskCredentialsCallback? _createPskCallback(
   Uri uri,
-  Form? form,
-  ClientSecurityProvider? clientSecurityProvider,
-) {
+  Form? form, {
+  ClientPskCallback? pskCredentialsCallback,
+}) {
   final usesPskScheme = form?.usesPskScheme ?? false;
-  final pskCredentialsCallback = clientSecurityProvider?.pskCredentialsCallback;
 
   if (!usesPskScheme || pskCredentialsCallback == null) {
     return null;
@@ -82,11 +81,19 @@ coap.PskCredentialsCallback? _createPskCallback(
 /// A [ProtocolClient] for the Constrained Application Protocol (CoAP).
 final class CoapClient implements ProtocolClient {
   /// Creates a new [CoapClient] based on an optional [CoapConfig].
-  CoapClient([this._coapConfig, this._clientSecurityProvider]);
+  CoapClient({
+    CoapConfig? coapConfig,
+    ClientPskCallback? pskCredentialsCallback,
+    AceSecurityCallback? aceSecurityCallback,
+  })  : _pskCredentialsCallback = pskCredentialsCallback,
+        _aceSecurityCallback = aceSecurityCallback,
+        _coapConfig = coapConfig;
 
   final CoapConfig? _coapConfig;
 
-  final ClientSecurityProvider? _clientSecurityProvider;
+  final ClientPskCallback? _pskCredentialsCallback;
+
+  final AceSecurityCallback? _aceSecurityCallback;
 
   Future<coap.CoapRequest> _createRequest(
     coap.RequestMethod requestMethod,
@@ -153,9 +160,12 @@ final class CoapClient implements ProtocolClient {
   }) async {
     final coapClient = coap.CoapClient(
       uri,
-      config: _InternalCoapConfig(_coapConfig ?? CoapConfig()),
-      pskCredentialsCallback:
-          _createPskCallback(uri, form, _clientSecurityProvider),
+      config: _InternalCoapConfig(_coapConfig ?? const CoapConfig()),
+      pskCredentialsCallback: _createPskCallback(
+        uri,
+        form,
+        pskCredentialsCallback: _pskCredentialsCallback,
+      ),
     );
 
     final request = await _createRequest(
@@ -169,8 +179,7 @@ final class CoapClient implements ProtocolClient {
     );
 
     final creationHint = await _obtainAceCreationHintFromForm(form);
-    final aceCredentialsCallback =
-        _clientSecurityProvider?.aceCredentialsCallback;
+    final aceCredentialsCallback = _aceSecurityCallback;
 
     final coap.CoapResponse response;
 
@@ -236,7 +245,7 @@ final class CoapClient implements ProtocolClient {
 
     final coapClient = coap.CoapClient(
       creationHintUri,
-      config: _InternalCoapConfig(_coapConfig ?? CoapConfig()),
+      config: _InternalCoapConfig(_coapConfig ?? const CoapConfig()),
     );
 
     final response = await coapClient.send(request);
@@ -421,7 +430,7 @@ final class CoapClient implements ProtocolClient {
 
     final coapClient = coap.CoapClient(
       form.resolvedHref,
-      config: _InternalCoapConfig(_coapConfig ?? CoapConfig()),
+      config: _InternalCoapConfig(_coapConfig ?? const CoapConfig()),
     );
 
     if (subprotocol == CoapSubprotocol.observe) {

lib/src/binding_coap/coap_client_factory.dart

@@ -4,33 +4,43 @@
 //
 // SPDX-License-Identifier: BSD-3-Clause
 
+import '../core/credentials/callbacks.dart';
 import '../core/protocol_interfaces/protocol_client.dart';
 import '../core/protocol_interfaces/protocol_client_factory.dart';
-import '../core/security_provider.dart';
 import 'coap_client.dart';
 import 'coap_config.dart';
 
 /// A [ProtocolClientFactory] that produces CoAP clients.
 final class CoapClientFactory implements ProtocolClientFactory {
   /// Creates a new [CoapClientFactory] based on an optional [CoapConfig].
-  CoapClientFactory([this.coapConfig]);
-
-  @override
-  Set<String> get schemes => {'coap', 'coaps'};
+  CoapClientFactory({
+    this.coapConfig,
+    ClientPskCallback? pskCredentialsCallback,
+    AceSecurityCallback? aceSecurityCallback,
+  })  : _pskCredentialsCallback = pskCredentialsCallback,
+        _aceSecurityCallback = aceSecurityCallback;
 
   /// The [CoapConfig] used to configure new clients.
   final CoapConfig? coapConfig;
 
+  final ClientPskCallback? _pskCredentialsCallback;
+
+  final AceSecurityCallback? _aceSecurityCallback;
+
+  @override
+  Set<String> get schemes => {'coap', 'coaps'};
+
   @override
   bool destroy() {
     return true;
   }
 
   @override
-  ProtocolClient createClient([
-    ClientSecurityProvider? clientSecurityProvider,
-  ]) =>
-      CoapClient(coapConfig, clientSecurityProvider);
+  ProtocolClient createClient() => CoapClient(
+        coapConfig: coapConfig,
+        pskCredentialsCallback: _pskCredentialsCallback,
+        aceSecurityCallback: _aceSecurityCallback,
+      );
 
   @override
   bool init() {

lib/src/binding_coap/coap_config.dart

@@ -6,10 +6,13 @@
 
 import 'dart:typed_data';
 
+import 'package:meta/meta.dart';
+
 /// Allows for configuring the behavior of CoAP clients and servers.
+@immutable
 class CoapConfig {
   /// Creates a new [CoapConfig] object.
-  CoapConfig({
+  const CoapConfig({
     this.port = 5683,
     this.securePort = 5684,
     this.blocksize,

lib/src/binding_coap/coap_server.dart

@@ -4,8 +4,8 @@
 //
 // SPDX-License-Identifier: BSD-3-Clause
 
+import '../core/credentials/callbacks.dart';
 import '../core/protocol_interfaces/protocol_server.dart';
-import '../core/security_provider.dart';
 import '../scripting_api/exposed_thing.dart';
 import 'coap_config.dart';