fix(authz): finir SEC-16, que mon propre correctif avait laisse a moitie

La vague K a pose un schema sur create_team et edit_team et a laisse cinq
routes soeurs du meme fichier lire int(request.form.get(...)) : add_coach,
add_manager, remove_coach, remove_manager et add_player. Un identifiant non
numerique y etait un 500 dans chacune.

C'est exactement la lecon que ce projet repete depuis la vague D -- corriger
un motif fautif dans une seule couche le laisse dans les autres -- et cette
fois c'est le correctif lui-meme qui l'a commise. Notee comme telle.

Deux defauts de plus, trouves en finissant.

add_player ecrivait status tel quel dans une colonne NOT NULL String(20). Et
toggle_player_status lit "substitute si status == starter, sinon starter" :
une valeur inconnue devenait donc starter a la premiere bascule, c'est-a-dire
promouvait son porteur. Liste blanche dans TEAM_PLAYER_STATUSES.

Et aucune de ces routes ne regardait is_active_account. La requete qui
alimente la liste deroulante des joueurs ne le filtrait pas non plus, alors
que les deux requetes juste au-dessus, coachs et gerants, le posaient -- deux
lignes d'ecart, meme fichier. Un compte desactive etait donc propose et
accepte, alors que is_active_account est precisement ce qui dit que la
personne a quitte le club. Meme oubli dans tryouts.py.

_staff_member delegue desormais a _assignable au lieu de repeter isinstance :
deux fonctions du meme fichier repondant differemment a "ce compte peut-il
prendre ce role" est la forme de tous les defauts qu'a eus ce module.

Verifie par mutation : retirer le controle d'activite ou la liste blanche
fait tomber trois tests.

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

app/routes/teams.py

@@ -29,7 +29,7 @@ from app.models import (
     User,
 )
 from app.permissions import visible_org_teams
-from app.validators import OrgTeamSchema
+from app.validators import OrgTeamSchema, TeamPlayerSchema, TeamStaffSchema
 
 teams_bp = Blueprint('teams', __name__, url_prefix='/teams')
 
@@ -55,7 +55,12 @@ def list_teams():
     managers = (
         User.query.filter_by(role='manager', is_active_account=True).order_by(User.username).all()
     )
-    all_players = User.query.filter_by(role='player').order_by(User.username).all()
+    # is_active_account, like the two queries above it. Without it the "add
+    # player" select offered accounts that had been deactivated, and
+    # add_player accepted them.
+    all_players = (
+        User.query.filter_by(role='player', is_active_account=True).order_by(User.username).all()
+    )
     return render_template(
         'pages/teams.html',
         teams=teams,
@@ -119,27 +124,58 @@ def my_teams():
     return render_template('pages/my_teams.html', team_data=team_data, now=now)
 
 
-def _staff_member(user_id, expected_class):
-    """The user behind an id, only if they hold the role being assigned.
+def _posted(schema):
+    """Load a form through `schema`, or None when it will not load.
 
-    Returns None for a missing id, an unknown id, or an account of the wrong
-    role. That last case is the point (SEC-16): the id comes from a `<select>`
-    the browser rendered, so it is a value the client chooses, and nothing
-    checked it in two of the three places that used it. A forged submission
-    could therefore list a player among a team's coaches — the same defect
-    wave G fixed in `tryouts.py`, left standing here.
+    The five assignment routes below each answer a bad field with their own
+    flash and a redirect to the same page, so a shared "it did not validate"
+    return is enough; the field-level message is flashed on the way out.
+    """
+    try:
+        return schema.load(form_payload())
+    except ValidationError as err:
+        flash_validation_errors(err)
+        return None
+
+
+def _assignable(user, expected_class):
+    """Whether this account may be given a role on a team.
+
+    Deactivated accounts were offered by the selects and accepted by the
+    routes. `is_active_account` is what stops someone logging in — a person
+    who has left the club — so putting them on a roster contradicts the one
+    control that says they are gone. The listings filtered it for coaches and
+    managers and not for players, two lines apart, which is how it went
+    unnoticed.
+    """
+    return isinstance(user, expected_class) and bool(user.is_active_account)
+
+
+def _staff_member(user_id, expected_class):
+    """The user behind an id, only if they may hold the role being assigned.
+
+    Returns None for a missing id, an unknown id, an account of the wrong
+    role, or a deactivated one. The role check is the point (SEC-16): the id
+    comes from a `<select>` the browser rendered, so it is a value the client
+    chooses, and nothing checked it in two of the three places that used it.
+    A forged submission could therefore list a player among a team's coaches
+    — the same defect wave G fixed in `tryouts.py`, left standing here.
+
+    Defers to `_assignable` rather than repeating `isinstance`: two functions
+    in one file answering "may this account take this role" differently is
+    the shape of every defect this module has had.
 
     Args:
-        user_id: Already an int or None, thanks to OrgTeamSchema.
+        user_id: Already an int or None, thanks to the schema.
         expected_class: Coach or Manager.
 
     Returns:
-        User | None: The account, when it is of the expected role.
+        User | None: The account, when it may take the role.
     """
     if not user_id:
         return None
     user = db.session.get(User, user_id)
-    return user if isinstance(user, expected_class) else None
+    return user if user and _assignable(user, expected_class) else None
 
 
 @teams_bp.route('/create', methods=['POST'])
@@ -305,13 +341,15 @@ def add_coach(team_id):
         flash(_('Permission denied.'), 'danger')
         return redirect(url_for('teams.list_teams'))
 
-    coach_id = request.form.get('coach_id')
-    if not coach_id:
+    data = _posted(TeamStaffSchema())
+    if data is None:
+        return redirect(url_for('teams.list_teams'))
+    if not data['coach_id']:
         flash(_('Please select a coach.'), 'danger')
         return redirect(url_for('teams.list_teams'))
 
-    coach = User.query.get_or_404(int(coach_id))
-    if not isinstance(coach, Coach):
+    coach = db.session.get(User, data['coach_id'])
+    if not coach or not _assignable(coach, Coach):
         flash(_('Only coaches can be assigned as coach.'), 'danger')
         return redirect(url_for('teams.list_teams'))
 
@@ -346,13 +384,15 @@ def add_manager(team_id):
         flash(_('Permission denied.'), 'danger')
         return redirect(url_for('teams.list_teams'))
 
-    manager_id = request.form.get('manager_id')
-    if not manager_id:
+    data = _posted(TeamStaffSchema())
+    if data is None:
+        return redirect(url_for('teams.list_teams'))
+    if not data['manager_id']:
         flash(_('Please select a manager.'), 'danger')
         return redirect(url_for('teams.list_teams'))
 
-    manager = User.query.get_or_404(int(manager_id))
-    if not isinstance(manager, Manager):
+    manager = db.session.get(User, data['manager_id'])
+    if not manager or not _assignable(manager, Manager):
         flash(_('Only managers can be assigned as manager.'), 'danger')
         return redirect(url_for('teams.list_teams'))
 
@@ -387,9 +427,12 @@ def remove_coach(team_id):
         flash(_('Permission denied.'), 'danger')
         return redirect(url_for('teams.list_teams'))
 
-    coach_id = request.form.get('coach_id')
-    if coach_id:
-        coach = User.query.get(int(coach_id))
+    data = _posted(TeamStaffSchema())
+    if data is None:
+        return redirect(url_for('teams.list_teams'))
+
+    if data['coach_id']:
+        coach = db.session.get(User, data['coach_id'])
         if coach and team.coaches.filter_by(id=coach.id).first():
             team.coaches.remove(coach)
             if team.coach_id == coach.id:
@@ -412,9 +455,12 @@ def remove_manager(team_id):
         flash(_('Permission denied.'), 'danger')
         return redirect(url_for('teams.list_teams'))
 
-    manager_id = request.form.get('manager_id')
-    if manager_id:
-        manager = User.query.get(int(manager_id))
+    data = _posted(TeamStaffSchema())
+    if data is None:
+        return redirect(url_for('teams.list_teams'))
+
+    if data['manager_id']:
+        manager = db.session.get(User, data['manager_id'])
         if manager and team.managers.filter_by(id=manager.id).first():
             team.managers.remove(manager)
             if team.manager_id == manager.id:
@@ -437,14 +483,16 @@ def add_player(team_id):
         flash(_('Permission denied.'), 'danger')
         return redirect(url_for('teams.list_teams'))
 
-    player_id = request.form.get('player_id')
-    status = request.form.get('status', 'starter')
-    if not player_id:
+    data = _posted(TeamPlayerSchema())
+    if data is None:
+        return redirect(url_for('teams.list_teams'))
+    if not data['player_id']:
         flash(_('Please select a player.'), 'danger')
         return redirect(url_for('teams.list_teams'))
 
-    player = User.query.get_or_404(int(player_id))
-    if not isinstance(player, Player):
+    status = data['status']
+    player = db.session.get(User, data['player_id'])
+    if not player or not _assignable(player, Player):
         flash(_('Can only assign players to teams.'), 'danger')
         return redirect(url_for('teams.list_teams'))