Add basic Flask micro-saas for pilates scheduling

.gitignore

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+__pycache__/
+*.pyc
+pilates.db
+venv/

README.md

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+# Pilates Studio Manager
+
+Sistema simples em Flask para organização de agenda e controle de recebimentos em estúdios de pilates. Funciona em ambiente local usando SQLite.
+
+## Instalação
+
+1. Certifique-se de ter o Python 3 instalado.
+2. Opcionalmente crie um ambiente virtual:
+   ```
+   python3 -m venv venv
+   source venv/bin/activate
+   ```
+3. Instale as dependências:
+   ```
+   pip install -r requirements.txt
+   ```
+4. Inicialize o banco de dados:
+   ```
+   flask init-db
+   ```
+5. Inicie o servidor local:
+   ```
+   flask run
+   ```
+
+A aplicação estará disponível em `http://localhost:5000`.
+
+## Funcionalidades básicas
+
+- Cadastro de alunos e instrutores.
+- Agendamento de aulas.
+- Registro de pagamentos.
+- Visualização rápida das informações mais importantes em telas simples.

main.py

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+from flask import Flask, render_template, request, redirect, url_for, flash
+from flask_sqlalchemy import SQLAlchemy
+from datetime import datetime
 
+app = Flask(__name__)
+app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///pilates.db'
+app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+app.secret_key = 'change-this-key'
+
+db = SQLAlchemy(app)
+
+class Student(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(80), nullable=False)
+    email = db.Column(db.String(120))
+
+class Instructor(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(80), nullable=False)
+
+class ClassSchedule(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    instructor_id = db.Column(db.Integer, db.ForeignKey('instructor.id'), nullable=False)
+    student_id = db.Column(db.Integer, db.ForeignKey('student.id'), nullable=False)
+    start_time = db.Column(db.DateTime, nullable=False)
+
+    instructor = db.relationship('Instructor')
+    student = db.relationship('Student')
+
+class Payment(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    student_id = db.Column(db.Integer, db.ForeignKey('student.id'), nullable=False)
+    amount = db.Column(db.Float, nullable=False)
+    paid_at = db.Column(db.Date, default=datetime.utcnow)
+
+    student = db.relationship('Student')
+
+@app.route('/')
+def index():
+    schedules = ClassSchedule.query.order_by(ClassSchedule.start_time).all()
+    return render_template('index.html', schedules=schedules)
+
+@app.route('/students', methods=['GET', 'POST'])
+def students():
+    if request.method == 'POST':
+        name = request.form['name']
+        email = request.form.get('email')
+        if name:
+            student = Student(name=name, email=email)
+            db.session.add(student)
+            db.session.commit()
+            flash('Aluno adicionado com sucesso!')
+        return redirect(url_for('students'))
+    students = Student.query.all()
+    return render_template('students.html', students=students)
+
+@app.route('/instructors', methods=['GET', 'POST'])
+def instructors():
+    if request.method == 'POST':
+        name = request.form['name']
+        if name:
+            instructor = Instructor(name=name)
+            db.session.add(instructor)
+            db.session.commit()
+            flash('Instrutor adicionado com sucesso!')
+        return redirect(url_for('instructors'))
+    instructors = Instructor.query.all()
+    return render_template('instructors.html', instructors=instructors)
+
+@app.route('/classes', methods=['GET', 'POST'])
+def classes():
+    students = Student.query.all()
+    instructors = Instructor.query.all()
+    if request.method == 'POST':
+        instructor_id = request.form['instructor_id']
+        student_id = request.form['student_id']
+        start_time = datetime.fromisoformat(request.form['start_time'])
+        schedule = ClassSchedule(instructor_id=instructor_id, student_id=student_id, start_time=start_time)
+        db.session.add(schedule)
+        db.session.commit()
+        flash('Aula agendada com sucesso!')
+        return redirect(url_for('classes'))
+    schedules = ClassSchedule.query.order_by(ClassSchedule.start_time).all()
+    return render_template('classes.html', schedules=schedules, students=students, instructors=instructors)
+
+@app.route('/payments', methods=['GET', 'POST'])
+def payments():
+    students = Student.query.all()
+    if request.method == 'POST':
+        student_id = request.form['student_id']
+        amount = float(request.form['amount'])
+        payment = Payment(student_id=student_id, amount=amount)
+        db.session.add(payment)
+        db.session.commit()
+        flash('Pagamento registrado com sucesso!')
+        return redirect(url_for('payments'))
+    payments = Payment.query.order_by(Payment.paid_at.desc()).all()
+    return render_template('payments.html', payments=payments, students=students)
+
+@app.cli.command('init-db')
+def init_db():
+    db.create_all()
+    print('Banco de dados inicializado.')
+
+if __name__ == '__main__':
+    app.run(debug=True)

requirements.txt

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+Flask
+Flask-SQLAlchemy

templates/classes.html

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+<!doctype html>
+<html lang="pt-BR">
+<head><meta charset="utf-8"><title>Agendar Aula</title></head>
+<body>
+<h1>Agendar Aula</h1>
+<form method="post">
+  <select name="student_id" required>
+    {% for student in students %}
+      <option value="{{ student.id }}">{{ student.name }}</option>
+    {% endfor %}
+  </select>
+  <select name="instructor_id" required>
+    {% for instructor in instructors %}
+      <option value="{{ instructor.id }}">{{ instructor.name }}</option>
+    {% endfor %}
+  </select>
+  <input type="datetime-local" name="start_time" required>
+  <button type="submit">Agendar</button>
+</form>
+<ul>
+{% for s in schedules %}
+  <li>{{ s.start_time }} - {{ s.student.name }} com {{ s.instructor.name }}</li>
+{% endfor %}
+</ul>
+<a href="{{ url_for('index') }}">Voltar</a>
+</body>
+</html>

templates/index.html

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+<!doctype html>
+<html lang="pt-BR">
+<head>
+  <meta charset="utf-8">
+  <title>Pilates Studio</title>
+</head>
+<body>
+  <h1>Agenda de Aulas</h1>
+  <nav>
+    <a href="{{ url_for('students') }}">Alunos</a> |
+    <a href="{{ url_for('instructors') }}">Instrutores</a> |
+    <a href="{{ url_for('classes') }}">Agendar Aula</a> |
+    <a href="{{ url_for('payments') }}">Pagamentos</a>
+  </nav>
+  <ul>
+  {% for s in schedules %}
+    <li>{{ s.start_time }} - {{ s.student.name }} com {{ s.instructor.name }}</li>
+  {% else %}
+    <li>Nenhuma aula agendada.</li>
+  {% endfor %}
+  </ul>
+</body>
+</html>

templates/instructors.html

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+<!doctype html>
+<html lang="pt-BR">
+<head><meta charset="utf-8"><title>Instrutores</title></head>
+<body>
+<h1>Instrutores</h1>
+<form method="post">
+  <input type="text" name="name" placeholder="Nome" required>
+  <button type="submit">Adicionar</button>
+</form>
+<ul>
+{% for instructor in instructors %}
+  <li>{{ instructor.name }}</li>
+{% endfor %}
+</ul>
+<a href="{{ url_for('index') }}">Voltar</a>
+</body>
+</html>

templates/payments.html

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+<!doctype html>
+<html lang="pt-BR">
+<head><meta charset="utf-8"><title>Pagamentos</title></head>
+<body>
+<h1>Pagamentos</h1>
+<form method="post">
+  <select name="student_id" required>
+    {% for student in students %}
+      <option value="{{ student.id }}">{{ student.name }}</option>
+    {% endfor %}
+  </select>
+  <input type="number" step="0.01" name="amount" placeholder="Valor" required>
+  <button type="submit">Registrar</button>
+</form>
+<ul>
+{% for p in payments %}
+  <li>{{ p.paid_at }} - {{ p.student.name }} pagou R$ {{ '%.2f'|format(p.amount) }}</li>
+{% endfor %}
+</ul>
+<a href="{{ url_for('index') }}">Voltar</a>
+</body>
+</html>

templates/students.html

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+<!doctype html>
+<html lang="pt-BR">
+<head><meta charset="utf-8"><title>Alunos</title></head>
+<body>
+<h1>Alunos</h1>
+<form method="post">
+  <input type="text" name="name" placeholder="Nome" required>
+  <input type="email" name="email" placeholder="Email (opcional)">
+  <button type="submit">Adicionar</button>
+</form>
+<ul>
+{% for student in students %}
+  <li>{{ student.name }} ({{ student.email or '-' }})</li>
+{% endfor %}
+</ul>
+<a href="{{ url_for('index') }}">Voltar</a>
+</body>
+</html>