perf: borner le calendrier et remplacer trois boucles par des requetes

PERF-002, PERF-003, PERF-004. Aucun changement de comportement : chaque
reecriture est accompagnee de tests qui enoncent la reponse attendue, pas
la methode.

PERF-002 -- /matches/api/events
Le flux parcourait `tryout.matches` pour chaque tryout visible -- pour un
president, tout l historique du club -- puis posait une requete
MatchParticipant PAR match pour savoir si la personne qui regarde y figure.
Le cout du calendrier croissait avec l historique, a chaque navigation.

FullCalendar envoie deja `start` et `end` sur une source d evenements de
type URL. Personne ne les lisait. La requete est desormais bornee, et les
participants de tous les matchs de la fenetre sont charges en une fois,
joueur compris. Des bornes illisibles sont ignorees plutot que refusees :
un calendrier qui en montre trop est un probleme de performance, un
calendrier qui renvoie 400 est une page blanche.

PERF-003 -- get_players_available_at_time
Chargeait tous les joueurs actifs, puis une requete PlayerDisponibility par
joueur, sur une colonne non indexee. Deux requetes desormais, quelle que
soit la taille du club. Mesure dans le test : 7 requetes pour 6 joueurs
avant, 2 apres.

PERF-004 -- decompte des evaluations en attente
Chargeait toutes les inscriptions du club et toutes les evaluations du
coach, construisait deux ensembles Python et les soustrayait -- deux
lectures de table entiere pour produire un entier. Un COUNT DISTINCT avec
NOT EXISTS.

Les tests couvrent ce que la reecriture aurait pu changer sans bruit : fin
de creneau exclusive, compte desactive exclu, joueur a cheval sur deux
creneaux compte une fois, evaluation d un autre coach qui ne libere pas la
ligne, double inscription comptee une fois (DB-006 n a pas encore atterri,
donc le cas existe).

PERF-001 (view_tryout) n est pas fait : c est le plus gros des quatre, il
touche la page la plus consultee et merite son propre lot.

23 tests ajoutes, 371 au total.

Co-Authored-By: Claude Opus 5 <[email protected]>

app/routes/main.py

@@ -116,14 +116,27 @@ def dashboard():
 
     elif isinstance(user, Coach):
         stats['my_evaluations'] = Evaluation.query.filter_by(evaluator_id=user.id).count()
-        registrations = TryoutRegistration.query.filter(
-            TryoutRegistration.status.in_(['registered', 'attended'])
-        ).all()
-        registered_player_ids = [r.player_id for r in registrations]
-        evaluated_player_ids = [
-            e.player_id for e in Evaluation.query.filter_by(evaluator_id=user.id).all()
-        ]
-        stats['pending_evaluations'] = len(set(registered_player_ids) - set(evaluated_player_ids))
+
+        # A count, computed as a count. This used to load every registration
+        # row in the club and every evaluation this coach had written, build
+        # two Python sets and subtract them — two full table reads to produce
+        # one integer (PERF-004).
+        already_evaluated = (
+            db.session.query(Evaluation.player_id)
+            .filter(
+                Evaluation.evaluator_id == user.id,
+                Evaluation.player_id == TryoutRegistration.player_id,
+            )
+            .exists()
+        )
+        stats['pending_evaluations'] = (
+            db.session.query(func.count(func.distinct(TryoutRegistration.player_id)))
+            .filter(
+                TryoutRegistration.status.in_(['registered', 'attended']),
+                ~already_evaluated,
+            )
+            .scalar()
+        )
         stats['my_recent_evaluations'] = (
             Evaluation.query.filter_by(evaluator_id=user.id)
             .order_by(Evaluation.created_at.desc())

app/routes/matches.py

@@ -25,6 +25,8 @@ from app.models import (
     PersonalNote,
 )
 from datetime import datetime, timedelta
+
+from sqlalchemy.orm import joinedload
 from app.services.scheduling import notify_participants, zip_participants
 
 matches_bp = Blueprint('matches', __name__, url_prefix='/matches')
@@ -50,15 +52,76 @@ def calendar():
     return render_template('pages/calendar.html')
 
 
+def calendar_window(args):
+    """The date range FullCalendar is asking about, if it said.
+
+    A URL event source appends `start` and `end` automatically, in ISO 8601
+    with an offset (`2026-08-01T00:00:00-04:00`). Only the date part is
+    needed here, and a value that does not parse is treated as absent
+    rather than as an error: a calendar that shows too much is a
+    performance problem, one that 400s is a broken page.
+
+    Args:
+        args: request.args.
+
+    Returns:
+        tuple[date | None, date | None]: Inclusive bounds.
+    """
+
+    def _parse(value):
+        if not value:
+            return None
+        try:
+            return datetime.strptime(value[:10], '%Y-%m-%d').date()
+        except (ValueError, TypeError):
+            return None
+
+    return _parse(args.get('start')), _parse(args.get('end'))
+
+
 @matches_bp.route('/api/events')
 @login_required
 def api_events():
-    """API endpoint returning calendar events for FullCalendar."""
+    """Calendar events for FullCalendar.
+
+    Bounded and batched (PERF-002). This used to walk `tryout.matches` for
+    every visible tryout — every tryout the club has ever run, for a
+    president — and then issue one MatchParticipant query per match to find
+    out whether the viewer was in it. The calendar's cost grew with the
+    whole history, on every navigation.
+    """
     events = []
     tryouts = get_visible_tryouts_for_user()
+    tryouts_by_id = {tryout.id: tryout for tryout in tryouts}
 
-    for tryout in tryouts:
-        for match in tryout.matches:
+    if tryouts_by_id:
+        window_start, window_end = calendar_window(request.args)
+        query = Match.query.filter(Match.tryout_id.in_(tryouts_by_id))
+        if window_start:
+            query = query.filter(Match.date >= window_start)
+        if window_end:
+            query = query.filter(Match.date <= window_end)
+        matches = query.all()
+
+        # Participants for every match in the window, in one query rather
+        # than one per match. `participants` is a dynamic relationship, so
+        # eager loading options do not apply to it.
+        match_ids = [match.id for match in matches]
+        participants_by_match = {}
+        mine_by_match = {}
+        if match_ids:
+            rows = (
+                MatchParticipant.query.filter(MatchParticipant.match_id.in_(match_ids))
+                .options(joinedload(MatchParticipant.player))
+                .all()
+            )
+            for row in rows:
+                participants_by_match.setdefault(row.match_id, []).append(row)
+                if row.player_id == current_user.id:
+                    mine_by_match[row.match_id] = row
+
+        for match in matches:
+            tryout = tryouts_by_id[match.tryout_id]
             match_color = '#10b981' if match.match_type == 'team_vs_team' else '#f59e0b'
             # 'description' used to be participants_str + '<br>' + description.
             # Building presentation markup inside a JSON field is what carried
@@ -75,18 +138,16 @@ def api_events():
                     teams.append(match.team2.name)
                 participants_str = ' vs '.join(teams)
             else:
-                player_names = []
-                for p in match.participants.all():
-                    player_names.append(p.player.username if p.player else 'Unknown Player')
+                player_names = [
+                    p.player.username if p.player else 'Unknown Player'
+                    for p in participants_by_match.get(match.id, [])
+                ]
                 participants_str = ', '.join(player_names) if player_names else 'No players'
 
             start_time_str = match.start_time.strftime('%H:%M') if match.start_time else None
             end_time_str = match.end_time.strftime('%H:%M') if match.end_time else None
 
-            user_participant = MatchParticipant.query.filter_by(
-                match_id=match.id,
-                player_id=current_user.id,
-            ).first()
+            user_participant = mine_by_match.get(match.id)
 
             events.append(
                 {
@@ -625,7 +686,20 @@ def delete_match(match_id):
 
 
 def get_players_available_at_time(date_str, time_str):
-    """Get list of player IDs available at a specific date and time."""
+    """Player IDs whose weekly availability covers this date and time.
+
+    Two queries, whatever the size of the club. This used to load every
+    active player and then run one PlayerDisponibility query per player, on
+    an unindexed column — sixty players meant sixty-one round trips to
+    answer a question the database can answer in one (PERF-003).
+
+    Args:
+        date_str: 'YYYY-MM-DD'.
+        time_str: 'HH:MM'.
+
+    Returns:
+        list[int]: Player IDs, empty when the input does not parse.
+    """
     try:
         parsed_date = datetime.strptime(date_str, '%Y-%m-%d')
         time_obj = datetime.strptime(time_str, '%H:%M').time()
@@ -633,22 +707,30 @@ def get_players_available_at_time(date_str, time_str):
         return []
 
     day_of_week = parsed_date.weekday()
+    active_player_ids = {
+        row.id
+        for row in User.query.with_entities(User.id)
+        .filter_by(role='player', is_active_account=True)
+        .all()
+    }
+    if not active_player_ids:
+        return []
 
-    players = User.query.filter_by(role='player', is_active_account=True).all()
-    available_players = []
-    for player in players:
-        disponibilities = PlayerDisponibility.query.filter_by(
-            player_id=player.id,
-            day_of_week=day_of_week,
-        ).all()
-        for disp in disponibilities:
-            disp_start = disp.start_time.hour * 60 + disp.start_time.minute
-            disp_end = disp.end_time.hour * 60 + disp.end_time.minute
-            match_time = time_obj.hour * 60 + time_obj.minute
-            if disp_start <= match_time < disp_end:
-                available_players.append(player.id)
-                break
-    return available_players
+    # The comparison stays in Python: start_time and end_time are stored as
+    # time columns, and comparing them in SQL across three backends is not
+    # worth the portability risk for a single day's rows.
+    minutes = time_obj.hour * 60 + time_obj.minute
+    available = []
+    seen = set()
+    for disp in PlayerDisponibility.query.filter_by(day_of_week=day_of_week).all():
+        if disp.player_id in seen or disp.player_id not in active_player_ids:
+            continue
+        start = disp.start_time.hour * 60 + disp.start_time.minute
+        end = disp.end_time.hour * 60 + disp.end_time.minute
+        if start <= minutes < end:
+            available.append(disp.player_id)
+            seen.add(disp.player_id)
+    return available
 
 
 @matches_bp.route('/api/available_players/<date>/<time>')