Resolve "user login and authentication"

Closes #4 (closed)

src/main.py

@@ -2,19 +2,23 @@ from flask import Flask, request
 from flask_restful import Api, Resource
 import os.path
 from datetime import datetime
+import re
+from flask_bcrypt import Bcrypt
+
 
 from flask_sqlalchemy import SQLAlchemy
 
 app = Flask(__name__)
 app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///database.db'
 db = SQLAlchemy(app)
+bcrypt = Bcrypt(app)
 api = Api(app)
 
 
 class User(db.Model):
     id = db.Column(db.Integer, primary_key=True, autoincrement=True)
     name = db.Column(db.String(255), nullable=False)
-    email = db.Column(db.String(255), nullable=False)
+    email = db.Column(db.String(255), nullable=False, unique=True)
     pwd = db.Column(db.String(255), nullable=False)
     admin = db.Column(db.Boolean, nullable=False, default=False)
     accepted = db.Column(db.Boolean, nullable=False, default=False)
@@ -91,19 +95,23 @@ class FindSalamanderInfo(Resource):
 class RegisterUser(Resource):
     @staticmethod
     def post():
-
-        output = {"message": "something went wrong"}
         data = request.form
-        if not data['name'] or not data['email'] or not data['password'] or not data['confirmPassword']:
-            output = {"message": "data is incorrect"}
-
-        else:
+        if data['name'] or data['email'] or data['password'] or data['confirmPassword']:
             if data['password'] == data['confirmPassword']:
-                user = User(name=data['name'], email=data['email'], pwd=data['password'])
-                db.session.add(user)
-                db.session.commit()
-                output = {"message": "user added"}
-
+                email_regex = "^[a-z0-9]+[\._]?[a-z0-9]+[@]\w+[.]\w{2,3}$"
+                user = db.session.query(User).filter_by(email=data['email']).first()
+                if user is None and re.search(email_regex, data['email']):
+                    password_hash = bcrypt.generate_password_hash(data['password'])
+                    new_user = User(name=data['name'], email=data['email'], pwd=password_hash)
+                    db.session.add(new_user)
+                    db.session.commit()
+                    output = {"message": "new user created"}
+                else:
+                    output = {"message": "invalid email"}
+            else:
+                output = {"message": "password does not match"}
+        else:
+            output = {"message": "wrong data posted"}
         return output