refactor: made pydantic check the input.

no longer by the code itself.

ref: N25B-198

src/control_backend/api/v1/endpoints/program.py

@@ -1,9 +1,7 @@
 import logging
 
-from fastapi import APIRouter, HTTPException, Request
-from pydantic import ValidationError
+from fastapi import APIRouter, Request
 
-from control_backend.schemas.message import Message
 from control_backend.schemas.program import Program
 
 logger = logging.getLogger(__name__)
@@ -11,20 +9,12 @@ router = APIRouter()
 
 
 @router.post("/program", status_code=202)
-async def receive_message(program: Message, request: Request):
+async def receive_message(program: Program, request: Request):
     """
-    Receives a BehaviorProgram as a stringified JSON list inside `message`.
+    Receives a BehaviorProgram, pydantic checks it.
     Converts it into real Phase objects.
     """
     logger.debug("Received raw program: %s", program)
-    raw_str = program.message  # This is the JSON string
-
-    # Validate program
-    try:
-        program = Program.model_validate_json(raw_str)
-    except ValidationError as e:
-        logger.error("Failed to validate program JSON: %s", e)
-        raise HTTPException(status_code=400, detail="Not a valid program") from None
 
     # send away
     topic = b"program"

test/integration/api/endpoints/test_program_endpoint.py

@@ -6,7 +6,6 @@ from fastapi import FastAPI
 from fastapi.testclient import TestClient
 
 from control_backend.api.v1.endpoints import program
-from control_backend.schemas.message import Message
 from control_backend.schemas.program import Program
 
 
@@ -57,51 +56,48 @@ def test_receive_program_success(client):
     client.app.state.endpoints_pub_socket = mock_pub_socket
 
     program_dict = make_valid_program_dict()
-    message_body = json.dumps(program_dict)
-    msg = Message(message=message_body)
 
-    # Act
-    response = client.post("/program", json=msg.model_dump())
+    response = client.post("/program", json=program_dict)
 
-    # Assert
     assert response.status_code == 202
     assert response.json() == {"status": "Program parsed"}
 
-    # Verify socket call (don't compare raw JSON string)
+    # Verify socket call
     mock_pub_socket.send_multipart.assert_awaited_once()
     args, kwargs = mock_pub_socket.send_multipart.await_args
 
     assert args[0][0] == b"program"
+
     sent_bytes = args[0][1]
-
-    # Decode sent bytes and compare actual structures
     sent_obj = json.loads(sent_bytes.decode())
-    expected_obj = Program.model_validate_json(message_body).model_dump()
 
+    expected_obj = Program.model_validate(program_dict).model_dump()
     assert sent_obj == expected_obj
 
 
 def test_receive_program_invalid_json(client):
-    """Invalid JSON string (not parseable) should trigger HTTP 400."""
+    """
+    Invalid JSON (malformed) -> FastAPI never calls endpoint.
+    It returns a 422 Unprocessable Entity.
+    """
     mock_pub_socket = AsyncMock()
     client.app.state.endpoints_pub_socket = mock_pub_socket
 
-    bad_json_str = "{invalid json}"
-    msg = Message(message=bad_json_str)
+    # FastAPI only accepts valid JSON bodies, so send raw string
+    response = client.post("/program", content="{invalid json}")
 
-    response = client.post("/program", json=msg.model_dump())
-
-    assert response.status_code == 400
-    assert response.json()["detail"] == "Not a valid program"
+    assert response.status_code == 422
     mock_pub_socket.send_multipart.assert_not_called()
 
 
 def test_receive_program_invalid_deep_structure(client):
-    """Valid JSON shape but invalid deep nested data should still raise 400."""
+    """
+    Valid JSON but schema invalid -> Pydantic throws validation error -> 422.
+    """
     mock_pub_socket = AsyncMock()
     client.app.state.endpoints_pub_socket = mock_pub_socket
 
-    # Structurally correct Program, but with missing elements
+    # Missing "value" in norms element
     bad_program = {
         "phases": [
             {
@@ -110,7 +106,7 @@ def test_receive_program_invalid_deep_structure(client):
                 "nextPhaseId": "phase2",
                 "phaseData": {
                     "norms": [
-                        {"id": "n1", "name": "norm"}  # Missing "value"
+                        {"id": "n1", "name": "norm"}  # INVALID: missing "value"
                     ],
                     "goals": [
                         {"id": "g1", "name": "goal", "description": "desc", "achieved": False}
@@ -123,9 +119,7 @@ def test_receive_program_invalid_deep_structure(client):
         ]
     }
 
-    msg = Message(message=json.dumps(bad_program))
-    response = client.post("/program", json=msg.model_dump())
+    response = client.post("/program", json=bad_program)
 
-    assert response.status_code == 400
-    assert response.json()["detail"] == "Not a valid program"
+    assert response.status_code == 422
     mock_pub_socket.send_multipart.assert_not_called()