refactor(gameplay): move scoreboard transitions into cartridge service

fupogfakta/services.py

@@ -1,6 +1,23 @@
 import random
+from dataclasses import dataclass
 
-from .models import GameSession, Player, Question, RoundConfig, RoundQuestion, ScoreEvent
+from django.db import transaction
+
+from .models import GameSession, Guess, LieAnswer, Player, Question, RoundConfig, RoundQuestion, ScoreEvent
+
+
+@dataclass(frozen=True)
+class RoundTransitionResult:
+    session: GameSession
+    round_config: RoundConfig
+    round_question: RoundQuestion
+    should_broadcast: bool
+
+
+@dataclass(frozen=True)
+class FinishGameResult:
+    session: GameSession
+    should_broadcast: bool
 
 
 def get_current_round_question(session: GameSession) -> RoundQuestion | None:
@@ -13,6 +30,16 @@ def get_current_round_question(session: GameSession) -> RoundQuestion | None:
 
 
 
+def reset_round_question_bootstrap_state(round_question: RoundQuestion) -> RoundQuestion:
+    Guess.objects.filter(round_question=round_question).delete()
+    LieAnswer.objects.filter(round_question=round_question).delete()
+    if round_question.mixed_answers:
+        round_question.mixed_answers = []
+        round_question.save(update_fields=["mixed_answers"])
+    return round_question
+
+
+
 def select_round_question(session: GameSession, round_config: RoundConfig) -> RoundQuestion:
     existing_round_question = get_current_round_question(session)
     if existing_round_question is not None:
@@ -61,6 +88,83 @@ def prepare_mixed_answers(round_question: RoundQuestion) -> list[str]:
 
 
 
+def start_next_round(session: GameSession) -> RoundTransitionResult:
+    with transaction.atomic():
+        locked_session = GameSession.objects.select_for_update().get(pk=session.pk)
+        next_round_config = None
+        round_question = None
+        should_broadcast = False
+
+        if locked_session.status == GameSession.Status.SCOREBOARD:
+            previous_round_config = RoundConfig.objects.filter(
+                session=locked_session,
+                number=locked_session.current_round,
+            ).select_related("category").first()
+            if previous_round_config is None:
+                raise ValueError("round_config_missing")
+
+            next_round_number = locked_session.current_round + 1
+            next_round_config = RoundConfig(
+                session=locked_session,
+                number=next_round_number,
+                category=previous_round_config.category,
+                lie_seconds=previous_round_config.lie_seconds,
+                guess_seconds=previous_round_config.guess_seconds,
+                points_correct=previous_round_config.points_correct,
+                points_bluff=previous_round_config.points_bluff,
+                started_from_scoreboard=True,
+            )
+            locked_session.current_round = next_round_number
+
+            round_question = reset_round_question_bootstrap_state(select_round_question(locked_session, next_round_config))
+
+            next_round_config.save()
+            locked_session.status = GameSession.Status.LIE
+            locked_session.save(update_fields=["current_round", "status"])
+            should_broadcast = True
+        elif locked_session.status == GameSession.Status.LIE:
+            if locked_session.current_round <= 1:
+                raise ValueError("next_round_invalid_phase")
+
+            next_round_config = RoundConfig.objects.filter(
+                session=locked_session,
+                number=locked_session.current_round,
+            ).select_related("category").first()
+            round_question = get_current_round_question(locked_session)
+            if (
+                next_round_config is None
+                or not next_round_config.started_from_scoreboard
+                or round_question is None
+            ):
+                raise ValueError("next_round_invalid_phase")
+        else:
+            raise ValueError("next_round_invalid_phase")
+
+        return RoundTransitionResult(
+            session=locked_session,
+            round_config=next_round_config,
+            round_question=round_question,
+            should_broadcast=should_broadcast,
+        )
+
+
+
+def finish_game(session: GameSession) -> FinishGameResult:
+    with transaction.atomic():
+        locked_session = GameSession.objects.select_for_update().get(pk=session.pk)
+        should_broadcast = False
+
+        if locked_session.status == GameSession.Status.SCOREBOARD:
+            locked_session.status = GameSession.Status.FINISHED
+            locked_session.save(update_fields=["status"])
+            should_broadcast = True
+        elif locked_session.status != GameSession.Status.FINISHED:
+            raise ValueError("finish_game_invalid_phase")
+
+        return FinishGameResult(session=locked_session, should_broadcast=should_broadcast)
+
+
+
 def resolve_scores(
     session: GameSession,
     round_question: RoundQuestion,

fupogfakta/tests.py

@@ -5,7 +5,14 @@ from django.test import TestCase
 
 from fupogfakta.models import Category, GameSession, Guess, LieAnswer, Player, Question, RoundConfig, RoundQuestion, ScoreEvent
 from fupogfakta.payloads import build_lie_started_payload, build_reveal_payload
-from fupogfakta.services import get_current_round_question, prepare_mixed_answers, resolve_scores, select_round_question
+from fupogfakta.services import (
+    finish_game,
+    get_current_round_question,
+    prepare_mixed_answers,
+    resolve_scores,
+    select_round_question,
+    start_next_round,
+)
 
 User = get_user_model()
 
@@ -63,6 +70,46 @@ class FupOgFaktaExtractionSliceTests(TestCase):
         round_question.refresh_from_db()
         self.assertEqual(round_question.mixed_answers, answers)
 
+    def test_start_next_round_moves_scoreboard_transition_into_service(self):
+        self.session.status = GameSession.Status.SCOREBOARD
+        self.session.save(update_fields=["status"])
+
+        result = start_next_round(self.session)
+
+        self.session.refresh_from_db()
+        self.assertTrue(result.should_broadcast)
+        self.assertEqual(result.session.status, GameSession.Status.LIE)
+        self.assertEqual(result.session.current_round, 2)
+        self.assertEqual(result.round_config.number, 2)
+        self.assertTrue(result.round_config.started_from_scoreboard)
+        self.assertEqual(result.round_question.round_number, 2)
+
+    def test_start_next_round_rejects_plain_lie_without_scoreboard_marker(self):
+        self.session.status = GameSession.Status.LIE
+        self.session.current_round = 2
+        self.session.save(update_fields=["status", "current_round"])
+        RoundConfig.objects.create(session=self.session, number=2, category=self.category, started_from_scoreboard=False)
+        RoundQuestion.objects.create(
+            session=self.session,
+            round_number=2,
+            question=self.question_two,
+            correct_answer=self.question_two.correct_answer,
+        )
+
+        with self.assertRaisesMessage(ValueError, "next_round_invalid_phase"):
+            start_next_round(self.session)
+
+    def test_finish_game_moves_scoreboard_transition_into_service(self):
+        self.session.status = GameSession.Status.SCOREBOARD
+        self.session.save(update_fields=["status"])
+
+        result = finish_game(self.session)
+
+        self.session.refresh_from_db()
+        self.assertTrue(result.should_broadcast)
+        self.assertEqual(result.session.status, GameSession.Status.FINISHED)
+        self.assertEqual(self.session.status, GameSession.Status.FINISHED)
+
     def test_resolve_scores_applies_correct_and_bluff_points(self):
         round_question = RoundQuestion.objects.create(
             session=self.session,