backend-development-course/app/__init__.py

394 lines
11 KiB
Python

from flask import Flask, request, jsonify
from flask_jwt_extended import create_access_token, get_jwt_identity, jwt_required, JWTManager
import time
import json
import uuid
import datetime
import os
from hashlib import sha256
from marshmallow import Schema, fields
from flask_sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.config.from_pyfile('config.py', silent=True)
app.config["JWT_SECRET_KEY"] = os.getenv("JWT_SECRET_KEY")
db = SQLAlchemy(app)
jwt = JWTManager(app)
class UserModel(db.Model):
__tablename__ = "user"
uuid = db.Column(db.String(32), unique=True, primary_key=True, nullable=False)
name = db.Column(db.String(64), nullable=False)
password = db.Column(db.String(64), nullable=False)
bal_uuid = db.Column(db.String(32), db.ForeignKey('balance.uuid'))
class CategoryModel(db.Model):
__tablename__ = "category"
uuid = db.Column(db.String(32), unique=True, primary_key=True, nullable=False)
name = db.Column(db.String(64), nullable=False)
class RecordModel(db.Model):
__tablename__ = "record"
uuid = db.Column(db.String(32), primary_key=True, nullable=False)
user_uuid = db.Column(db.String(32), db.ForeignKey('user.uuid'))
cat_uuid = db.Column(db.String(32), db.ForeignKey('category.uuid'))
date = db.Column(db.Date)
amount = db.Column(db.Integer)
class BalanceModel(db.Model):
__tablename__ = "balance"
uuid = db.Column(db.String(32), primary_key=True, nullable=False)
value = db.Column(db.Integer, nullable=False)
class UserSchema(Schema):
uuid = fields.Str()
name = fields.Str()
password = fields.Str()
bal_uuid = fields.Str()
class CategorySchema(Schema):
uuid = fields.Str()
name = fields.Str()
class RecordSchema(Schema):
uuid = fields.Str()
user_uuid = fields.Str()
cat_uuid = fields.Str()
date = fields.Date('iso')
amount = fields.Integer()
class BalanceSchema(Schema):
uuid = fields.Str()
value = fields.Integer()
user_schema = UserSchema()
users_schema = UserSchema(many = True)
category_schema = CategorySchema()
categories_schema = CategorySchema(many = True)
record_schema = RecordSchema()
records_schema = RecordSchema(many = True)
balance_schema = BalanceSchema()
# "migration"
with app.app_context():
db.create_all()
@app.route("/healthcheck")
def ep_healthcheck():
return {
"date": time.strftime('%Y.%m.%d %H:%M:%S'),
"status": "OK"
}
@app.route("/reset_users_because_postman_is_dumb_like_that")
def ep_reset():
db.session.query(RecordModel).delete()
db.session.query(CategoryModel).delete()
db.session.query(UserModel).delete()
db.session.query(BalanceModel).delete()
db.session.commit()
return {}, 200
@app.route("/users", methods = ["GET"])
@jwt_required()
def ep_users_get():
result = db.session.query(UserModel).all()
return users_schema.dumps(result)
@app.route("/user", methods = ["POST"])
def ep_user_post():
name = request.json.get('name', None)
password = request.json.get('password', None)
pass_hashed = sha256(password.encode("UTF-8")).digest().hex()
b = BalanceModel(uuid=uuid.uuid4().hex, value=0)
u_uuid = uuid.uuid4().hex
bal_uuid = b.uuid
try:
_ = user_schema.load({'uuid': u_uuid, 'name': name,
'password': pass_hashed, 'bal_uuid': bal_uuid})
except Exception as e:
return {}, 403
u = UserModel(uuid=u_uuid, name=name,
password=pass_hashed, bal_uuid=bal_uuid)
at = create_access_token(identity = json.dumps({'uuid': u.uuid, 'bal_uuid': u.bal_uuid}))
try:
db.session.add(b)
db.session.add(u)
db.session.commit()
except Exception as e:
db.session.rollback()
return {}, 403
return jsonify(access_token = at), 200
@app.route("/user", methods = ["GET"])
def ep_user_get():
name = request.json.get('user', None)
password = request.json.get('password', None)
pass_hashed = sha256(password.encode("UTF-8")).digest().hex()
u = db.session.query(UserModel).filter(UserModel.name == name).one_or_none()
if not u:
return {}, 404
if u.password != pass_hashed:
return {"message": "Wrong password."}, 401
at = create_access_token(identity = json.dumps({'uuid': u.uuid, 'bal_uuid': u.bal_uuid}))
return jsonify(access_token = at), 200
@app.route("/user", methods = ["DELETE"])
@jwt_required()
def ep_user_delete():
current_user = json.loads(get_jwt_identity())
try:
db.session.query(UserModel).filter(UserModel.uuid == current_user['uuid']).delete()
db.session.query(BalanceModel).filter(BalanceModel.uuid == current_user['bal_uuid']).delete()
db.session.commit()
except Exception as e:
db.session.rollback()
return {}, 403
return {"message": "Success."}, 200
@app.route("/category", methods = ["GET"])
@jwt_required()
def ep_category_get():
body = request.json
if 'uuid' in body:
result = db.session.query(CategoryModel).filter(CategoryModel.uuid == body['uuid']).all()
if len(result) == 1:
return user_schema.dumps(result[0]), 200
else:
return {}, 404
else:
return {}, 403
@app.route("/category", methods = ["POST"])
@jwt_required()
def ep_category_post():
body = request.json
if not body:
return {}, 403
if 'uuid' in body:
return {}, 403
body.update({'uuid': uuid.uuid4().hex})
try:
_ = category_schema.load(body)
except ValidationError as e:
return {}, 403
c = CategoryModel(**body)
try:
db.session.add(c)
db.session.commit()
except Exception as e:
db.session.rollback()
return {}, 403
return jsonify(category_schema.load(body)), 200
@app.route("/category", methods = ["DELETE"])
@jwt_required()
def ep_category_delete():
body = request.json
if 'uuid' not in body:
return {}, 403
cat_id = body['uuid']
try:
result = db.session.query(CategoryModel).filter(CategoryModel.uuid == cat_id).all()
except Exception as e:
return {}, 403
if len(result) == 0:
return {}, 404
try:
db.session.query(CategoryModel).filter(CategoryModel.uuid == cat_id).delete()
db.session.commit()
except Exception as e:
return {}, 403
return category_schema.dumps(result[0]), 200
@app.route("/record/<record_id>", methods = ["GET"])
@jwt_required()
def ep_record_get(record_id):
current_user = json.loads(get_jwt_identity())
result = db.session.query(RecordModel).filter(RecordModel.uuid == record_id).one_or_none()
if result and result.user_uuid == current_user['uuid']:
return user_schema.dumps(result), 200
else:
return {}, 403
@app.route("/record", methods = ["GET"])
@jwt_required()
def ep_record_get_filtered():
r = db.session.query(RecordModel)
filtered = False
if 'user_id' in request.json:
r = r.filter(RecordModel.user_uuid == request.json['user_id'])
filtered = True
elif 'user_uuid' in request.json:
r = r.filter(RecordModel.user_uuid == request.json['user_uuid'])
filtered = True
if 'cat_id' in request.json:
r = r.filter(RecordModel.cat_uuid == request.json['cat_id'])
filtered = True
if 'cat_uuid' in request.json:
r = r.filter(RecordModel.cat_uuid == request.json['cat_uuid'])
filtered = True
if filtered:
return records_schema.dumps(r.all())
else:
return [], 403
@app.route("/record/<record_id>", methods = ["DELETE"])
@jwt_required()
def ep_record_del(record_id):
current_user = json.loads(get_jwt_identity())
try:
result = db.session.query(RecordModel).filter(RecordModel.uuid == record_id).one_or_none()
except Exception as e:
return {}, 403
if result and result.user_uuid == current_user['uuid']:
db.session.query(RecordModel).filter(RecordModel.uuid == record_id).delete()
db.session.commit()
else:
return {}, 401
return record_schema.dumps(result), 200
@app.route("/record", methods = ["POST"])
@jwt_required()
def ep_record_post():
current_user = json.loads(get_jwt_identity())
amount = request.json.get('amount', None)
category = request.json.get('category', None)
if not all([amount, category]):
return {}, 403
u_uuid = uuid.uuid4().hex
r_time = time.strftime("%Y-%m-%d")
try:
_ = record_schema.load({'amount': amount, "cat_uuid": category, "uuid": u_uuid,
'user_uuid': current_user['uuid'], 'date': r_time})
except Exception as e:
return {}, 400
r = RecordModel(amount=amount, cat_uuid=category, uuid=u_uuid, user_uuid=current_user['uuid'], date=r_time)
v = db.session \
.query(BalanceModel) \
.filter(BalanceModel.uuid == current_user['bal_uuid']) \
.one_or_none() \
.value
BalanceModel \
.metadata.tables.get("balance") \
.update() \
.where(BalanceModel.metadata.tables.get("balance").c.uuid == current_user['bal_uuid']) \
.values(value = v - amount)
try:
db.session.add(r)
db.session.commit()
except Exception as e:
db.session.rollback()
return {}, 403
return {'uuid': r.uuid}, 200
@app.route("/balance_up", methods = ["POST"])
@jwt_required()
def ep_balance_up():
current_user = json.loads(get_jwt_identity())
amount = request.json.get('amount', None)
try:
v = db.session \
.query(BalanceModel) \
.filter(BalanceModel.uuid == current_user['bal_uuid']) \
.one_or_none() \
.value
BalanceModel.metadata.tables.get("balance").update().where(BalanceModel.metadata.tables.get("balance").c.uuid == current_user['bal_uuid']).values(value = v + amount)
except Exception as e:
return {}, 407
return {}, 200
@app.route("/balance", methods = ["GET"])
@jwt_required()
def ep_balance_get():
current_user = json.loads(get_jwt_identity())
result = db.session.query(BalanceModel).filter(BalanceModel.uuid == current_user['bal_uuid']).one_or_none()
return balance_schema.dumps(result), 200
@jwt.expired_token_loader
def expired_token_callback(jwt_header, jwt_payload):
return (
jsonify({"message": "The token has expired.", "error": "token_expired"}),
401,
)
@jwt.invalid_token_loader
def invalid_token_callback(error):
return (
jsonify(
{"message": "Signature verification failed.", "error": "invalid_token"}
),
401,
)
@jwt.unauthorized_loader
def missing_token_callback(error):
return (
jsonify(
{
"description": "Request does not contain an access token.",
"error": "authorization_required",
}
),
401,
)