Add code generation for Dart

.github/workflows/idempotency-tests.yml

@@ -63,6 +63,7 @@ jobs:
           - ruby
           - php
           - python
+          - dart
         description:
           - "./tests/Kiota.Builder.IntegrationTests/InheritingErrors.yaml"
           - "./tests/Kiota.Builder.IntegrationTests/NoUnderscoresInModel.yaml"

.github/workflows/integration-tests.yml

@@ -43,6 +43,7 @@ jobs:
           - ruby
           - php
           - python
+          - dart
         description:
           - "./tests/Kiota.Builder.IntegrationTests/InheritingErrors.yaml"
           - "./tests/Kiota.Builder.IntegrationTests/EnumHandling.yaml"
@@ -109,6 +110,11 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: "3.11"
+      - name: Setup Dart
+        if: matrix.language == 'dart'
+        uses: dart-lang/setup-dart@v1
+        with:
+          sdk: "3.5"
 
       - name: Check if test is suppressed
         id: check-suppressed

.vscode/launch.json

@@ -170,6 +170,27 @@
       "console": "internalConsole",
       "stopAtEntry": false
     },
+    {
+      "name": "Launch Dart",
+      "type": "coreclr",
+      "request": "launch",
+      "preLaunchTask": "build",
+      "program": "${workspaceFolder}/src/kiota/bin/Debug/net8.0/kiota.dll",
+      "args": [
+        "generate",
+        "--openapi",
+        "https://raw.githubusercontent.com/microsoftgraph/msgraph-sdk-powershell/dev/openApiDocs/v1.0/Mail.yml",
+        "--language",
+        "dart",
+        "-o",
+        "${workspaceFolder}/samples/msgraph-mail/java/utilities/src/main/java/graphjavav4/utilities",
+        "-n",
+        "graphdart4.utilities"
+      ],
+      "cwd": "${workspaceFolder}/src/kiota",
+      "console": "internalConsole",
+      "stopAtEntry": false
+    },
     {
       "name": "Launch CLI (CSharp)",
       "type": "coreclr",
@@ -385,4 +406,4 @@
       "processId": "${command:pickProcess}"
     }
   ]
-}
+}

it/dart/.gitignore

@@ -0,0 +1,3 @@
+pubspec.lock
+.dart_tool/
+src/

it/dart/basic/test/api_client_test.dart

@@ -0,0 +1,24 @@
+import 'package:microsoft_kiota_abstractions/microsoft_kiota_abstractions.dart';
+import 'package:microsoft_kiota_http/microsoft_kiota_http.dart';
+import 'package:test/test.dart';
+import '../src/api_client.dart';
+import '../src/models/error.dart';
+
+void main() {
+  group('apiclient', () {
+    test('basic endpoint test', () {
+      final requestAdapter = HttpClientRequestAdapter(
+        client: KiotaClientFactory.createClient(),
+        authProvider: AnonymousAuthenticationProvider(),
+        pNodeFactory: ParseNodeFactoryRegistry.defaultInstance,
+        sWriterFactory: SerializationWriterFactoryRegistry.defaultInstance,
+      );
+      requestAdapter.baseUrl = "http://localhost:1080";
+      var client = ApiClient(requestAdapter);
+      expect(
+          () => client.api.v1.topics.getAsync(),
+          throwsA(predicate(
+              (e) => e is Error && e.id == 'my-sample-id' && e.code == 123)));
+    });
+  });
+}

it/dart/pubspec.yaml

@@ -0,0 +1,46 @@
+name: kiota_dart_generate
+description: api generation
+version: 0.0.1
+publish_to: none
+
+environment:
+  sdk: ^3.4.4
+
+# Add regular dependencies here.
+dependencies:
+  microsoft_kiota_abstractions:
+    git:
+      url: https://github.com/kiota-community/dart_kiota.git
+      ref: main
+      path: packages/microsoft_kiota_abstractions
+  microsoft_kiota_http:
+    git:
+      url: https://github.com/kiota-community/dart_kiota.git
+      ref: main
+      path: packages/microsoft_kiota_http
+  microsoft_kiota_serialization_form:
+    git:
+      url: https://github.com/kiota-community/dart_kiota.git
+      ref: main
+      path: packages/microsoft_kiota_serialization_form
+  microsoft_kiota_serialization_text:
+    git:
+      url: https://github.com/kiota-community/dart_kiota.git
+      ref: main
+      path: packages/microsoft_kiota_serialization_text
+  microsoft_kiota_serialization_json:
+    git:
+      url: https://github.com/kiota-community/dart_kiota.git
+      ref: main
+      path: packages/microsoft_kiota_serialization_json
+  microsoft_kiota_serialization_multipart:
+    git:
+      url: https://github.com/kiota-community/dart_kiota.git
+      ref: main
+      path: packages/microsoft_kiota_serialization_multipart
+  http: ^1.2.2
+  uuid: ^4.5.1
+
+dev_dependencies:
+  lints: ^3.0.0
+  test: ^1.25.2

it/exec-cmd.ps1

@@ -202,6 +202,30 @@ elseif ($language -eq "python") {
         Pop-Location
     }
 }
+elseif ($language -eq "dart") {
+    if ($mockServerTest) {
+        Push-Location $itTestPath
+
+        $itTestPathSources = Join-Path -Path $testPath -ChildPath "src"
+        $itTestPathDest = Join-Path -Path $itTestPath -ChildPath "src"
+        if (Test-Path $itTestPathDest) {
+            Remove-Item $itTestPathDest -Force -Recurse
+        }
+        Copy-Item -Path $itTestPathSources -Destination $itTestPathDest -Recurse
+
+        Invoke-Call -ScriptBlock {
+            dart test
+        } -ErrorAction Stop
+
+        Pop-Location
+    }
+    else {
+        Invoke-Call -ScriptBlock {
+            dart pub get
+            dart analyze src/
+        } -ErrorAction Stop
+    }
+}
 Pop-Location
 
 if (!([string]::IsNullOrEmpty($mockSeverITFolder))) {

it/get-additional-arguments.ps1

@@ -23,6 +23,9 @@ if ($language -eq "csharp") {
 elseif ($language -eq "java") {
     $command = " --output `"./it/$language/src/apisdk`""
 }
+elseif ($language -eq "dart") {
+    $command = " --output `"./it/$language/src`""
+}
 elseif ($language -eq "go") {
     $command = " --output `"./it/$language/client`" --namespace-name `"integrationtest/client`""
 }

src/Kiota.Builder/GenerationLanguage.cs

@@ -9,5 +9,6 @@ public enum GenerationLanguage
     Go,
     Swift,
     Ruby,
-    CLI
+    CLI,
+    Dart,
 }

src/Kiota.Builder/PathSegmenters/DartPathSegmenter.cs

@@ -0,0 +1,20 @@
+using System;
+using Kiota.Builder.CodeDOM;
+using Kiota.Builder.Extensions;
+using Kiota.Builder.Writers.Go;
+
+namespace Kiota.Builder.PathSegmenters;
+
+public class DartPathSegmenter(string rootPath, string clientNamespaceName) : CommonPathSegmenter(rootPath, clientNamespaceName)
+{
+    public override string FileSuffix => ".dart";
+
+    public override string NormalizeNamespaceSegment(string segmentName) => segmentName.ToCamelCase();
+
+    public override string NormalizeFileName(CodeElement currentElement) => GetLastFileNameSegment(currentElement).ToSnakeCase();
+
+    internal string GetRelativeFileName(CodeNamespace @namespace, CodeElement element)
+    {
+        return NormalizeFileName(element);
+    }
+}

src/Kiota.Builder/Refiners/DartExceptionsReservedNamesProvider.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+
+namespace Kiota.Builder.Refiners;
+public class DartExceptionsReservedNamesProvider : IReservedNamesProvider
+{
+    private readonly Lazy<HashSet<string>> _reservedNames = new(static () => new(StringComparer.OrdinalIgnoreCase)
+    {
+        "toString"
+    });
+    public HashSet<string> ReservedNames => _reservedNames.Value;
+}