MIL-005: Step 4 - Save progress

Review record RC-027 (Go, autonomous mode, not independent).

Task: MIL-005#1
Task: MIL-005#2
Task: MIL-005#3
Task: MIL-005#4
Task: MIL-005#5

src/flash_card/application/use_cases/open_study_session.py

@@ -9,19 +9,25 @@ from collections.abc import Callable, Sequence
 from flash_card.application.use_cases.study_session import StudySession
 from flash_card.domain.entities.card import Card
 from flash_card.domain.entities.deck import Deck
+from flash_card.domain.repositories.progress_repository import ProgressRepository
 from flash_card.domain.repositories.vocabulary_repository import VocabularyRepository
 
 
 def open_study_session(
     vocabulary_repository: VocabularyRepository,
+    progress_repository: ProgressRepository,
     choose: Callable[[Sequence[Card]], Card],
 ) -> StudySession:
-    """Load the word list and build a session over all its cards.
+    """Build a session over the saved words to learn, else the whole word list.
 
-    @param vocabulary_repository Source of the word list.
+    @param vocabulary_repository Source of the delivered word list.
+    @param progress_repository Store of the words still to learn.
     @param choose Picks one card from a non-empty sequence.
     @return The new session.
-    @throws VocabularyError When the word list cannot be loaded.
+    @throws VocabularyError When the saved progress, or the word list when no
+        progress exists, cannot be loaded.
     """
-    deck = Deck.from_vocabulary(vocabulary_repository.load())
-    return StudySession(deck, choose)
+    deck = progress_repository.load()
+    if deck is None:
+        deck = Deck.from_vocabulary(vocabulary_repository.load())
+    return StudySession(deck, choose, progress_repository)