League Selection

@app.route("/select")
def select():
    if "token" not in session:
        return redirect(url_for("index"))
    
    raw = yahoo_api(
        "fantasy/v2/users;use_login=1/games;game_codes=nba/leagues;out=teams"
    )
    # ... parse leagues

for lg in _safe_iter(_first(game, "leagues"), "league"):
    if _first(lg, "scoring_type") != "head":
        continue  # Skip non-head-to-head leagues
    
    # ... process this league

for team_container in _safe_iter(_first(lg, "teams"), "team"):
    team_data_list = team_container[0] if isinstance(team_container, list) else []
    
    for entry in team_data_list:
        if "managers" in entry and _is_owner(entry["managers"], guid):
            owner_team = entry.get("name", fallback)
            break

def _is_owner(managers_blob: Any, guid: str) -> bool:
    for m in _safe_iter(managers_blob, "manager"):
        if _first(m, "guid") == guid or str(_first(m, "is_current_login")) == "1":
            return True
    return False

leagues.sort(
    key=lambda x: (
        -int(x["season"]) if x["season"].isdigit() else 0,
        x["team_name"]
    )
)

return render_template("select.html", leagues=leagues)

<select id="team" name="league_key" class="form-select">
  <option value="" disabled selected>— Select your team —</option>
  {% for l in leagues %}
    <option value="{{ l.league_key }}" data-team="{{ l.team_name }}">
      {{ l.season }} – {{ l.team_name }}
    </option>
  {% endfor %}
</select>

const teamSelector = document.getElementById('team');
const teamField = document.getElementById('teamField');

teamSelector.addEventListener('change', () => {
  const selectedOption = teamSelector.options[teamSelector.selectedIndex];
  teamField.value = selectedOption.dataset.team;
});

@app.route("/greet", methods=["POST"])
def greet():
    session["league_key"] = request.form["league_key"]
    session["team_name"] = request.form["team_name"]
    return redirect(url_for("dashboard"))