Session-Daten persistent in DB speichern für Resume-Funktionalität

Problem gelöst:
- User kann nach Neustart/Beenden an derselben Stelle weitermachen
- Bei Wechsel zu Statistik und zurück gehen keine Daten verloren

Implementierung:
- Progress-Tabelle erweitert um: total_elapsed_time, key_stroke_count, is_paused
- Session-Daten werden in DB und Session gespeichert
- train() lädt Session-Daten aus DB
- update_progress speichert Session-Daten in DB
- Bei Lektionswechsel werden Session-Daten zurückgesetzt

Alembic-Migration: 8e747f72e854

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

alembic/versions/8e747f72e854_add_session_data_to_progress_table.py

@@ -0,0 +1,36 @@
+"""Add session data to Progress table
+
+Revision ID: 8e747f72e854
+Revises: 1106215c45af
+Create Date: 2025-10-29 00:30:27.582990
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '8e747f72e854'
+down_revision: Union[str, Sequence[str], None] = '1106215c45af'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('progress', sa.Column('total_elapsed_time', sa.Integer(), nullable=True, server_default='0'))
+    op.add_column('progress', sa.Column('key_stroke_count', sa.Integer(), nullable=True, server_default='0'))
+    op.add_column('progress', sa.Column('is_paused', sa.Boolean(), nullable=True, server_default='1'))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('progress', 'is_paused')
+    op.drop_column('progress', 'key_stroke_count')
+    op.drop_column('progress', 'total_elapsed_time')
+    # ### end Alembic commands ###

app.py

@@ -410,14 +410,21 @@ def train():
         # Lade die gespeicherte Benutzereingabe und Cursor-Position aus der Datenbank
         user_input = progress.last_text
         cursor_position = progress.current_position
-        
-        # Lade zusätzliche Zustandsdaten aus der Session
-        total_elapsed_time = session.get('total_elapsed_time', 0)
-        net_training_time = session.get('net_training_time', 0)
-        key_stroke_count = session.get('key_stroke_count', 0)
-        # Starte immer im Pausenmodus
-        is_paused = True
-        session['is_paused'] = True
+
+        # Lade Session-Daten aus der Datenbank (für Resume nach Neustart/Statistik)
+        total_elapsed_time = getattr(progress, 'total_elapsed_time', 0) or 0
+        key_stroke_count = getattr(progress, 'key_stroke_count', 0) or 0
+        is_paused = getattr(progress, 'is_paused', True)
+
+        # Netto-Trainingszeit muss aus total_elapsed_time berechnet werden
+        # (wird in JavaScript SessionManager verwaltet)
+        net_training_time = total_elapsed_time
+
+        # Synchronisiere Session mit DB
+        session['total_elapsed_time'] = total_elapsed_time
+        session['net_training_time'] = net_training_time
+        session['key_stroke_count'] = key_stroke_count
+        session['is_paused'] = is_paused
         
         return render_template('index.html',
                              current_text=current_text,
@@ -599,10 +606,15 @@ def update_progress():
                 progress.current_position = cursor_position
                 progress.last_text = user_input
 
+                # Speichere Session-Daten auch in der DB (für Resume nach Neustart/Statistik)
+                progress.total_elapsed_time = int(total_elapsed_time)
+                progress.key_stroke_count = key_stroke_count
+                progress.is_paused = is_paused
+
                 # Speichere in der Datenbank
                 db.session.commit()
 
-                # Speichere zusätzliche Zustandsdaten in der Session
+                # Speichere zusätzliche Zustandsdaten auch in der Session (für Kompatibilität)
                 session['total_elapsed_time'] = total_elapsed_time
                 session['net_training_time'] = net_training_time
                 session['key_stroke_count'] = key_stroke_count
@@ -682,13 +694,21 @@ def next_text():
         else:
             # Wenn wir am Ende sind, starten wir von vorne
             progress.current_text_index = 0
-        
+
         progress.current_position = 0
         progress.last_text = ""
 
+        # Setze Session-Daten zurück bei Lektionswechsel
+        progress.total_elapsed_time = 0
+        progress.key_stroke_count = 0
+        progress.is_paused = True
+
         db.session.commit()
 
-        # Setze Session in Pausenmodus
+        # Synchronisiere Session
+        session['total_elapsed_time'] = 0
+        session['net_training_time'] = 0
+        session['key_stroke_count'] = 0
         session['is_paused'] = True
 
         # Bestimme den Titel der neuen Lektion
@@ -728,9 +748,17 @@ def set_lesson():
         progress.current_position = 0
         progress.last_text = ""
 
+        # Setze Session-Daten zurück bei Lektionswechsel
+        progress.total_elapsed_time = 0
+        progress.key_stroke_count = 0
+        progress.is_paused = True
+
         db.session.commit()
 
-        # Setze Session in Pausenmodus
+        # Synchronisiere Session
+        session['total_elapsed_time'] = 0
+        session['net_training_time'] = 0
+        session['key_stroke_count'] = 0
         session['is_paused'] = True
 
         # Bestimme den Titel der neuen Lektion

models.py

@@ -9,6 +9,11 @@ class Progress(db.Model):
     current_position = db.Column(db.Integer, default=0)
     last_text = db.Column(db.Text, default='')
 
+    # Session-Daten persistent speichern (für Resume nach Neustart/Statistik-Besuch)
+    total_elapsed_time = db.Column(db.Integer, default=0)  # in Millisekunden
+    key_stroke_count = db.Column(db.Integer, default=0)
+    is_paused = db.Column(db.Boolean, default=True)
+
 class Statistic(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     total_chars = db.Column(db.Integer, default=0)