modification and addition of backend files

config.py

@@ -0,0 +1,21 @@
+from decouple import config as decouple_config
+import os
+
+BASE_DIR = os.path.dirname(os.path.realpath(__file__))
+
+
+class Config:
+    SECRET_KEY = decouple_config('SECRET_KEY')
+    SQLALCHEMY_TRACK_MODIFICAITONS = decouple_config('SQLALCHEMY_TRACK_MODIFICAITONS', cast = bool)
+
+class DevConfig(Config):
+    SQLALCHEMY_DATABASE_URI = "sqlite:///" + os.path.join(BASE_DIR, 'dev.db')
+    DEBUG = True
+    SQLALCHEMY_ECHO = True
+
+class ProdConfig(Config):
+    pass
+
+class TestConfig(Config):
+    pass
+

exts.py

@@ -0,0 +1,3 @@
+from flask_sqlalchemy import SQLAlchemy
+
+db = SQLAlchemy()

main.py

@@ -1,14 +1,178 @@
-import os
-from flask import Flask
+from flask import Flask, request,jsonify
+from flask_restx import Api,Resource,fields
+from config import DevConfig
+from model import Recipe,User
+from exts import db
+from flask_migrate import Migrate
+from werkzeug.security import generate_password_hash, check_password_hash
+from flask_jwt_extended import JWTManager,create_access_token,create_refresh_token,jwt_required
 
-app = Flask(__name__)
 
-@app.route('/')
-def index():
-  return "<h1>Welcome to PipeOps</h1>"
+
+
+app = Flask(__name__) # Var keep flask obj
+
+app.config.from_object(DevConfig)
+
+db.init_app(app)
+
+migrate = Migrate(app, db)
+
+JWTManager(app)
+
+api = Api(app, doc='/docs')
+
+# model (serializer) # This is use to return responses.
+recipe_model = api.model(
+  "Recipe",
+  {
+    'id': fields.Integer(),
+    'title': fields.String(),
+    'description': fields.String()
+  }
+)
+
+
+signUp_model = api.model(
+  "SignUp",
+  {
+    'username': fields.String(),
+    'email': fields.String(),
+    'password': fields.String()
+  }
+) 
+
+login_model = api.model(
+  'Login',{
+    'username': fields.String(),
+    'password': fields.String()
+  }
+)
+
+# route Api
+@api.route('/home')
+class HomeResource(Resource):
+  def get(self):
+    return {"message": "Welcome to Harmony"}
+
+@api.route('/signup')
+class SignUp(Resource):
+
+  @api.expect(signUp_model)
+  def post(self):
+    data = request.get_json()
+
+    username = data.get('username')
+    db_user = User.query.filter_by(username = username).first()
+
+    if db_user is not None:
+      return jsonify({"message": f"User with username {username} already exit."})
+
+
+    new_user = User(
+      username = data.get('username'),
+      email = data.get('email'),
+      password = generate_password_hash(data.get('password'))
+    )
+
+    new_user.save()
+
+    return jsonify({'message': 'User created sucessful'})
+
+
+@api.route('/login')
+class Login(Resource):
+
+  @api.expect(login_model)
+  def post(self):
+    data = request.get_json()
+
+    username = data.get('username')
+    password = data.get('password')
+
+    db_user = User.query_filter_by(username = username).first()
+
+    if db_user and check_password_hash(db_user.password, password):
+
+      access_token = create_access_token(identity = db_user.username)
+      refresh_token = create_refresh_token(identity = db_user.username)
+
+      return jsonify(
+        {'access_token': access_token, 'refresh_token': refresh_token}
+      )
+
+
+@api.route('/recipes')
+class RecipesResource(Resource):
+
+  @api.marshal_list_with(recipe_model) # return list of obj
+  def get(self):
+    """Get all recipes"""
+    recipes = Recipe.query.all()
+
+    return recipes
+
+  @api.marshal_with(recipe_model) # return a single obj
+  @api.expect(recipe_model)
+  @jwt_required()
+  def post(self):
+    """Create a new recipe"""
+    data = request.get_json() # This enable us to acquire the client data (head, body, title,,,....) from the request
+
+    new_recipe = Recipe(
+      title = data.get("title"),
+      description = data.get('description')
+    )
+
+    new_recipe.save()
+
+    return new_recipe, 201
+
+@api.route('/recipe/<int:id>')
+class RecipeResource(Resource):
+
+  @api.marshal_with(recipe_model)
+  def get(self, id):
+    """Get a recipe by id"""
+    recipe = Recipe.query.get_or_404(id)
+    return recipe
+
+  @api.marshal_with(recipe_model)
+  @jwt_required()
+  def put(self, id):
+    """Update a recipe by id"""
+
+    recipe_to_update =  Recipe.query.get_or_404(id)
+
+    data = request.get_json()
+
+    recipe_to_update.update(data.get('title'), data.get('description'))
+
+    return recipe_to_update
+
+  @api.marshal_with(recipe_model)
+  @jwt_required()
+  def delete(self, id):
+    """Delete a recipe by id""" 
+
+    recipe_to_delete =  Recipe.query.get_or_404(id)
+
+    recipe_to_delete.delete()
+
+    return recipe_to_delete
+
+@app.shell_context_processor
+def make_shell_context():
+  return {
+    "db":db,
+    "Recipe": Recipe
+  }
 
 if __name__ == '__main__':
-  # Use PORT environment variable if available, or default to 5000
-  port = int(os.environ.get('PORT', 5000))
-  app.run(host='0.0.0.0', port=port)
+  app.run()
+
 
+# if __name__ == '__main__':
+#   # Use PORT environment variable if available, or default to 5000
+#   port = int(os.environ.get('PORT', 5000))
+#   app.run(host='0.0.0.0', port=port)

migrations/README

@@ -0,0 +1 @@
+Single-database configuration for Flask.

migrations/alembic.ini

@@ -0,0 +1,50 @@
+# A generic, single database configuration.
+
+[alembic]
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic,flask_migrate
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[logger_flask_migrate]
+level = INFO
+handlers =
+qualname = flask_migrate
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

migrations/env.py

@@ -0,0 +1,113 @@
+import logging
+from logging.config import fileConfig
+
+from flask import current_app
+
+from alembic import context
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+logger = logging.getLogger('alembic.env')
+
+
+def get_engine():
+    try:
+        # this works with Flask-SQLAlchemy<3 and Alchemical
+        return current_app.extensions['migrate'].db.get_engine()
+    except (TypeError, AttributeError):
+        # this works with Flask-SQLAlchemy>=3
+        return current_app.extensions['migrate'].db.engine
+
+
+def get_engine_url():
+    try:
+        return get_engine().url.render_as_string(hide_password=False).replace(
+            '%', '%%')
+    except AttributeError:
+        return str(get_engine().url).replace('%', '%%')
+
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+config.set_main_option('sqlalchemy.url', get_engine_url())
+target_db = current_app.extensions['migrate'].db
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def get_metadata():
+    if hasattr(target_db, 'metadatas'):
+        return target_db.metadatas[None]
+    return target_db.metadata
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url, target_metadata=get_metadata(), literal_binds=True
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+
+    # this callback is used to prevent an auto-migration from being generated
+    # when there are no changes to the schema
+    # reference: http://alembic.zzzcomputing.com/en/latest/cookbook.html
+    def process_revision_directives(context, revision, directives):
+        if getattr(config.cmd_opts, 'autogenerate', False):
+            script = directives[0]
+            if script.upgrade_ops.is_empty():
+                directives[:] = []
+                logger.info('No changes in schema detected.')
+
+    conf_args = current_app.extensions['migrate'].configure_args
+    if conf_args.get("process_revision_directives") is None:
+        conf_args["process_revision_directives"] = process_revision_directives
+
+    connectable = get_engine()
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection,
+            target_metadata=get_metadata(),
+            **conf_args
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()