app.py

import os

from flask import Flask
from flask_smorest import Api
from flask_migrate import Migrate
from dotenv import load_dotenv
from flask_cors import CORS

from db import db

from resources.album import blp as AlbumBlueprint

def create_app(db_url=None):
    app = Flask(__name__)
    CORS(app)
    load_dotenv()

    app.config["PROPAGATE_EXCEPTIONS"] = True
    app.config["API_TITLE"] = "Favorites page REST API"
    app.config["API_VERSION"] = "v1"
    app.config["OPENAPI_VERSION"] = "3.0.3"
    app.config["OPENAPI_URL_PREFIX"] = "/"
    app.config["OPENAPI_SWAGGER_UI_PATH"] = "/swagger-ui"
    app.config["OPENAPI_SWAGGER_UI_URL"] = "https://cdn.jsdelivr.net/npm/swagger-ui-dist/"
    app.config["SQLALCHEMY_DATABASE_URI"] = db_url or os.getenv("DATABASE_URL", "sqlite:///data.db")
    db.init_app(app)
    migrate = Migrate(app, db)

    api = Api(app)

    api.register_blueprint(AlbumBlueprint)

    return app