Create the template for the Flask framework

app/__init__.py

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+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+from flask_login import LoginManager
+from flask_migrate import Migrate
+from config import Config
+
+db = SQLAlchemy()
+login_manager = LoginManager()
+migrate = Migrate()
+
+def create_app():
+    app = Flask(__name__)
+    app.config.from_object(Config)
+    
+    db.init_app(app)
+    login_manager.init_app(app)
+    migrate.init_app(app, db)
+    
+    # Register blueprints for modular routes
+    from .routes.admin import admin_bp
+    from .routes.auth import auth_bp
+    from .routes.customer import customer_bp
+    from .routes.repair import repair_bp
+    from .routes.inventory import inventory_bp
+    from .routes.technician import technician_bp
+    from .routes.audit import audit_bp
+    app.register_blueprint(admin_bp)
+    app.register_blueprint(auth_bp)
+    app.register_blueprint(customer_bp)
+    app.register_blueprint(repair_bp)
+    app.register_blueprint(inventory_bp)
+    app.register_blueprint(technician_bp)
+    app.register_blueprint(audit_bp)
+    
+    return app

app/models.py

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+from . import db
+from flask_login import UserMixin
+from datetime import datetime
+
+# User roles: admin, technician, customer
+class User(db.Model, UserMixin):
+    id = db.Column(db.Integer, primary_key=True)
+    username = db.Column(db.String(80), unique=True, nullable=False)
+    password_hash = db.Column(db.String(128), nullable=False)
+    role = db.Column(db.String(20), default='customer')
+    customer = db.relationship('Customer', uselist=False, backref='user')
+
+class Customer(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(120))
+    email = db.Column(db.String(120), unique=True)
+    phone = db.Column(db.String(20))
+    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
+    repairs = db.relationship('RepairJob', backref='customer')
+
+class Technician(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(120))
+    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
+    repairs = db.relationship('RepairJob', backref='technician')
+
+class RepairJob(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    tracking_number = db.Column(db.String(50), unique=True)
+    device = db.Column(db.String(120))
+    description = db.Column(db.Text)
+    status = db.Column(db.String(50), default='New')
+    customer_id = db.Column(db.Integer, db.ForeignKey('customer.id'))
+    technician_id = db.Column(db.Integer, db.ForeignKey('technician.id'))
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    cost_estimate = db.Column(db.Float)
+    final_cost = db.Column(db.Float)
+    parts_used = db.relationship('RepairPart', backref='repair')
+    barcode_path = db.Column(db.String(256))
+    notes = db.relationship('RepairNote', backref='repair')
+
+class RepairNote(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    repair_id = db.Column(db.Integer, db.ForeignKey('repair_job.id'))
+    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
+    note = db.Column(db.Text)
+    timestamp = db.Column(db.DateTime, default=datetime.utcnow)
+
+class RepairPart(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    repair_id = db.Column(db.Integer, db.ForeignKey('repair_job.id'))
+    part_id = db.Column(db.Integer, db.ForeignKey('inventory_item.id'))
+    quantity = db.Column(db.Integer)
+
+class InventoryItem(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    part_name = db.Column(db.String(120))
+    quantity = db.Column(db.Integer)
+    low_stock_threshold = db.Column(db.Integer, default=1)
+
+class AuditLog(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
+    action = db.Column(db.String(256))
+    timestamp = db.Column(db.DateTime, default=datetime.utcnow)
+    details = db.Column(db.Text)

app/routes/audit.py

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+from flask import Blueprint, render_template
+from flask_login import login_required
+from app.models import AuditLog
+
+audit_bp = Blueprint('audit', __name__, url_prefix='/audit')
+
+@audit_bp.route('/log')
+@login_required
+def log():
+    logs = AuditLog.query.order_by(AuditLog.timestamp.desc()).all()
+    return render_template('audit/log.html', logs=logs)

app/routes/customer.py

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+from flask import Blueprint, render_template
+from flask_login import login_required, current_user
+from app.models import Customer
+
+customer_bp = Blueprint('customer', __name__, url_prefix='/customers')
+
+@customer_bp.route('/portal')
+@login_required
+def portal():
+    customer = Customer.query.filter_by(user_id=current_user.id).first_or_404()
+    return render_template('customers/portal.html', customer=customer)

app/routes/repair.py

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+from flask import Blueprint, render_template, request, redirect, url_for, flash, current_app
+from flask_login import login_required, current_user
+from app.models import db, RepairJob, Customer, Technician, AuditLog
+from app.utils.barcode import generate_barcode
+
+repair_bp = Blueprint('repair', __name__, url_prefix='/repairs')
+
+@repair_bp.route('/new', methods=['GET', 'POST'])
+@login_required
+def new_repair():
+    if request.method == 'POST':
+        # ... get form data ...
+        repair = RepairJob(
+            device=request.form['device'],
+            description=request.form['description'],
+            customer_id=request.form['customer_id'],
+            technician_id=request.form.get('technician_id'),
+        )
+        db.session.add(repair)
+        db.session.commit()
+        # Generate and save barcode image
+        barcode_path = generate_barcode(repair.id, repair.tracking_number)
+        repair.barcode_path = barcode_path
+        db.session.commit()
+        # Audit log
+        audit = AuditLog(user_id=current_user.id, action='Created repair', details=f"Repair ID {repair.id}")
+        db.session.add(audit)
+        db.session.commit()
+        flash('Repair job created!')
+        return redirect(url_for('repair.detail', repair_id=repair.id))
+    # ... render form ...
+    return render_template('repairs/new.html')
+
+@repair_bp.route('/<int:repair_id>')
+@login_required
+def detail(repair_id):
+    repair = RepairJob.query.get_or_404(repair_id)
+    return render_template('repairs/detail.html', repair=repair)

app/templates/base.html

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+<!doctype html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <title>{% block title %}Repair Tracker{% endblock %}</title>
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/bootstrap.min.css') }}">
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/custom.css') }}">
+</head>
+
+<body>
+    {% include 'navbar.html' %}
+    <div class="container-fluid mt-3">
+        {% with messages = get_flashed_messages() %}
+        {% if messages %}
+        <div class="alert alert-info">{{ messages[0] }}</div>
+        {% endif %}
+        {% endwith %}
+        {% block content %}{% endblock %}
+    </div>
+    <script src="{{ url_for('static', filename='js/bootstrap.bundle.min.js') }}"></script>
+    <script src="{{ url_for('static', filename='js/custom.js') }}"></script>
+</body>
+
+</html>

app/utils/barcode.py

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+import os
+import qrcode
+from barcode import Code128
+from barcode.writer import ImageWriter
+from flask import current_app
+
+def generate_barcode(repair_id, tracking_number):
+    # Generate barcode image
+    barcode = Code128(tracking_number, writer=ImageWriter())
+    barcode_path = os.path.join(current_app.config['UPLOAD_FOLDER'], f'barcode_{repair_id}.png')
+    barcode.save(barcode_path)
+    # Optionally, also generate QR code
+    qr = qrcode.make(tracking_number)
+    qr_path = os.path.join(current_app.config['UPLOAD_FOLDER'], f'qr_{repair_id}.png')
+    qr.save(qr_path)
+    return barcode_path