__init__.py

import os

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager
from werkzeug.security import generate_password_hash


# Change jinja template syntax
class CustomFlask(Flask):
    jinja_options = Flask.jinja_options.copy()
    jinja_options.update(dict(
        # Default is '{{', I'm changing this because Vue.js uses '{{' / '}}'
        variable_start_string='%%',
        variable_end_string='%%',
    ))


# # Create symbolic link to the required path, this is needed to download files in the appropriate format
# default_path: str = os.environ.get("SERVE_DIR")
# symbolic_path = "./linked_dir"
# if os.path.exists(symbolic_path):
#     os.remove(symbolic_path)
# os.symlink(default_path, symbolic_path)
# default_path = os.path.abspath(symbolic_path)

UPLOAD_DIR = os.path.join(os.path.dirname(__file__), "public")

# db must be initialized here for other files to access it
db_path = os.path.join(os.path.dirname(__file__), "database/users.db")
db = SQLAlchemy()


def create_app():
    """
    Creates and configures the flask app

    """
    # This must be imported here to avoid the chicken and the egg problem
    import file_manager
    import auth

    db_uri = f"sqlite:///{db_path}"

    app = CustomFlask(__name__, instance_relative_config=True)

    app.config["UPLOAD_FOLDER"] = UPLOAD_DIR

    app.config.from_mapping(
        SECRET_KEY=os.urandom(16),
        SQLALCHEMY_DATABASE_URI=db_uri)
    app.register_blueprint(file_manager.bp)
    app.register_blueprint(auth.bp)

    # Initialize login manager
    login_manager = LoginManager()
    login_manager.init_app(app)

    # Initialize database
    db.init_app(app)

    from models import DBUser, create_db
    create_db(app)

    # Add admin
    with app.app_context():
        user = DBUser.query.filter_by(email=os.getenv("ADMIN_EMAIL")).first()
        if not user:
            user = DBUser(email=os.getenv("ADMIN_EMAIL"), password=generate_password_hash(os.getenv("ADMIN_PASS")), username=os.getenv("ADMIN_NAME"))
            db.session.add(user)
            db.session.commit()

    @login_manager.user_loader
    def user_loader(user_id):
        return DBUser.query.get(int(user_id))

    return app