WIP auth, added Drift for database and refined shared_models for data exchange

backend/routes/auth/index.dart

@@ -0,0 +1,45 @@
+import 'dart:io';
+
+import 'package:backend/authenticator.dart';
+import 'package:dart_frog/dart_frog.dart';
+import 'package:dart_jsonwebtoken/dart_jsonwebtoken.dart';
+import 'package:shared_models/user.dart';
+
+Future<Response> onRequest(RequestContext context) async {
+  // Only allow POST requests
+  if (context.request.method != HttpMethod.post) {
+    return Response(statusCode: HttpStatus.methodNotAllowed);
+  }
+
+  try {
+    // Parse the request body
+    final body = await context.request.json() as Map<String, dynamic>;
+    final createUserReq = CreateUserRequest.fromJson(body);
+
+    // Generate token
+    final authenticator = context.read<Authenticator>();
+    final token = await authenticator.generateToken(username: createUserReq.username);
+
+    if (token == null) {
+      return Response.json(
+        statusCode: HttpStatus.internalServerError,
+        body: {'error': 'Failed to generate token'},
+      );
+    }
+
+    // Return the token
+    return Response.json(
+      body: {'token': token},
+    );
+  } on JWTParseException {
+    return Response.json(
+      statusCode: HttpStatus.badRequest,
+      body: {'error': 'Username is required'},
+    );
+  } catch (e) {
+    return Response.json(
+      statusCode: HttpStatus.internalServerError,
+      body: {'error': 'Internal server error'},
+    );
+  }
+}