from sqlalchemy import func from datetime import timedelta import io from flask_sqlalchemy import SQLAlchemy from flask import Flask, make_response, render_template, request, jsonify import jinja_partials from flask_htmx import HTMX import matplotlib.pyplot as plt import matplotlib.dates as mdates import os app = Flask(__name__) # TODO CHANGE SECRET KEY TO ENVIRONMENT VARIABLE app.config['SECRET_KEY'] = 'secret!' uri = os.getenv("DATABASE_URL") if uri and uri.startswith("postgres://"): uri = uri.replace("postgres://", "postgresql://", 1) app.config['SQLALCHEMY_DATABASE_URI'] = uri app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False jinja_partials.register_extensions(app) htmx = HTMX(app) db = SQLAlchemy(app) class User(db.Model): __tablename__ = 'users' id = db.Column(db.Integer, primary_key=True) name = db.Column(db.String(255), nullable=False) bike_id = db.Column(db.Integer, db.ForeignKey( 'bikes.id', ondelete='CASCADE'), nullable=False) workouts = db.relationship('Workout', backref='user', lazy=True) bike = db.relationship('Bike', backref='user', lazy=True) class Bike(db.Model): __tablename__ = 'bikes' id = db.Column(db.Integer, primary_key=True) display_name = db.Column(db.String(255), nullable=False) code_name = db.Column(db.String(255), nullable=False) class Workout(db.Model): __tablename__ = 'workouts' id = db.Column(db.Integer, primary_key=True) user_id = db.Column(db.Integer, db.ForeignKey( 'users.id', ondelete='CASCADE'), nullable=False) created_at = db.Column(db.DateTime, nullable=False, default=db.func.now()) cadence_readings = db.relationship( 'CadenceReading', backref='workout', lazy=True) class CadenceReading(db.Model): __tablename__ = 'cadence_readings' id = db.Column(db.Integer, primary_key=True) workout_id = db.Column(db.Integer, db.ForeignKey( 'workouts.id', ondelete='CASCADE'), nullable=False) created_at = db.Column(db.DateTime, nullable=False) rpm = db.Column(db.Integer, nullable=False) distance = db.Column(db.Numeric, nullable=False) speed = db.Column(db.Numeric, nullable=False) calories = db.Column(db.Numeric, nullable=False) power = db.Column(db.Integer, nullable=False) def render_users_and_workouts(): users = User.query.all() users_data = [] for user in users: workouts = get_workouts_for_user(user.id) user_data = { 'id': user.id, 'name': user.name, 'bike_id': user.bike_id, 'workouts_count': len(workouts), 'workouts': workouts } users_data.append(user_data) return render_template('users_and_workouts.html', users=users_data, bikes=Bike.query.all()) @app.route('/', methods=['GET']) def get_workouts(): return render_users_and_workouts() @app.route("/user//new_workout") def new_workout(user_id): user = User.query.get(user_id) return render_template('new_workout.html', user=user) @app.route('/users', methods=['GET', 'POST']) def users(): if request.method == 'GET': # get a list of all users in the database users = User.query.all() users_list = [{'id': user.id, 'name': user.name, 'workouts': len(user.workouts)} for user in users] return jsonify(users_list), 200 elif request.method == 'POST': # create a new user data = request.form name = data['name'] bike_id = data['bike_id'] # create a new user and add it to the database new_user = User(name=name, bike_id=bike_id) db.session.add(new_user) db.session.commit() return render_users_and_workouts() @app.route('/user/', methods=['DELETE']) def delete_user(user_id): user = User.query.get(user_id) if user: db.session.delete(user) db.session.commit() return render_users_and_workouts() else: return jsonify({'error': 'User not found.'}), 404 @app.route('/user//workouts', methods=['GET', 'POST']) def workouts(user_id): if request.method == 'GET': workouts_data = get_workouts_for_user(user_id) return render_template('workouts_list.html', workouts=workouts_data) elif request.method == 'POST': data = request.json data = data['workout'] # create a new workout workout = Workout(user_id=user_id) db.session.add(workout) db.session.commit() # add cadence readings to the workout for d in data: cadence_reading = CadenceReading( workout_id=workout.id, created_at=d['timestamp'], rpm=d['rpm'], distance=d['distance'], speed=d['speed'], calories=d['calories'], power=d['power']) db.session.add(cadence_reading) db.session.commit() return jsonify({'message': 'Workout created successfully.'}), 201 @app.route('/user//workout/', methods=['GET', 'DELETE']) def workout(user_id, workout_id): workout = Workout.query.filter_by(user_id=user_id, id=workout_id).first() if workout: if request.method == 'GET': # Get the cadence readings for the workout cadence_readings = CadenceReading.query.filter_by( workout_id=workout_id).all() if cadence_readings: # Create a graph of cadence readings x_values = [reading.created_at for reading in cadence_readings] y_values = [reading.rpm for reading in cadence_readings] fig, ax = plt.subplots() ax.plot(x_values, y_values) ax.set_xlabel('Time') ax.set_ylabel('Cadence (RPM)') # ax.set_title( # 'Cadence Readings for Workout {}'.format(workout_id)) ax.xaxis.set_major_formatter(mdates.DateFormatter("%H:%M")) # set the y-axis limits to start at 0 ax.set_ylim(bottom=0) # Save the graph to a bytes buffer buffer = io.BytesIO() plt.savefig(buffer, format='png', transparent=True, bbox_inches='tight') buffer.seek(0) # Create a response object with the graph image response = make_response(buffer.getvalue()) response.headers['Content-Type'] = 'image/png' response.headers['Content-Disposition'] = 'attachment; filename=cadence.png' return response, 200 else: return jsonify({'message': 'No cadence readings for workout {}.'.format(workout_id)}), 404 elif request.method == 'DELETE': # Delete the workout and its associated cadence readings CadenceReading.query.filter_by(workout_id=workout_id).delete() db.session.delete(workout) db.session.commit() workouts_data = get_workouts_for_user(user_id) return render_template('workouts_list.html', workouts=workouts_data) else: return jsonify({'message': 'Workout {} not found for user {}.'.format(workout_id, user_id)}), 404 @app.route('/user//workouts', methods=['GET', 'DELETE']) def workouts_for_user(user_id): workouts_data = get_workouts_for_user(user_id) return render_template('workouts_list.html', workouts=workouts_data) @app.route('/user//bike', methods=['GET']) def update_users_bike(user_id): bike_id = request.args.get('bike_id') user = User.query.get(user_id) bike = Bike.query.get(bike_id) if user and bike: user.bike_id = bike_id db.session.commit() return render_users_and_workouts() else: return jsonify({'error': 'User or bike not found.'}), 404 def get_workouts_for_user(user_id): workouts_data = [] workouts = Workout.query.filter_by(user_id=user_id).order_by( Workout.created_at.desc()).all() for workout in workouts: cadence_readings = CadenceReading.query.filter_by( workout_id=workout.id).all() if cadence_readings: start_time = min( reading.created_at for reading in cadence_readings) end_time = max( reading.created_at for reading in cadence_readings) duration = end_time - start_time average_rpm = sum( reading.rpm for reading in cadence_readings) / len(cadence_readings) calories = cadence_readings[-1].calories workouts_data.append({ 'id': workout.id, 'user_id': user_id, 'start_time': format_date_with_ordinal(start_time, '%#H:%M %B %dth %Y'), 'duration': format_duration(duration), 'average_rpm': int(average_rpm), 'calories': calories, }) return workouts_data def format_date_with_ordinal(d, format_string): ordinal = {'1': 'st', '2': 'nd', '3': 'rd'}.get(str(d.day)[-1:], 'th') return d.strftime(format_string).replace('{th}', ordinal) def format_duration(duration): hours, remainder = divmod(duration.seconds, 3600) minutes, _ = divmod(remainder, 60) if duration >= timedelta(hours=1): return f"{hours}h {minutes}m" else: return f"{minutes}m" if __name__ == '__main__': # Bind to PORT if defined, otherwise default to 5000. port = int(os.environ.get('PORT', 5000)) app.run(host='127.0.0.1', port=port)