lab2 signup function

Lab2/database_helper.py

+import sqlite3
+from flask import g
+
+DATABASE_URI = "database.db"
+
+def get_db():
+    db = getattr(g, 'db', None)
+    if db is None:
+        db = g.db = sqlite3.connect(DATABASE_URI)
+
+    return db
+
+
+def create_user(email, password, firstname, familyname, gender, city, country):
+    try:
+        get_db().execute("INSERT into USERS values(?, ?, ?, ?, ?, ?, ?);", [firstname, familyname, gender, city, country, email, password]);
+        get_db().commit()
+        return True
+    except:
+        return False
+
+def clean_db():
+    try:
+        get_db().execute("DROP table USERS;")
+        return True
+    except:
+        return False

Lab2/schema.sql

+CREATE TABLE USERS(
+   FIRST_NAME VARCHAR (25)     NOT NULL,
+   FAMILY_NAME VARCHAR (25)     NOT NULL,
+   GENDER  VARCHAR(6)          NOT NULL,
+   CITY  VARCHAR(20)          NOT NULL,
+   COUNTRY  VARCHAR(20)          NOT NULL,
+   EMAIL  VARCHAR(20)          NOT NULL,
+   PASSWORD  VARCHAR(20)          NOT NULL,
+   PRIMARY KEY (EMAIL)
+);

Lab2/server.py

-from flask import Flask
+from flask import Flask, request, jsonify
+
+import database_helper
 
 app = Flask(__name__)
 
-@app.route("/")
+@app.route("/", methods = ['GET'])
 def hello_world():
     return "<p>Hello, Lab_2!</p>", 200
+
+
+@app.route("/sign_up", methods = ['POST'])
+def sign_up():
+    data = request.get_json()
+    if ('email' in data and isinstance(data['email'], str)
+        and 'password' in data and isinstance(data['password'], str)
+        and 'firstname' in data and isinstance(data['firstname'], str)
+        and 'familyname' in data and isinstance(data['familyname'], str)
+        and 'gender' in data and isinstance(data['gender'], str)
+        and 'city' in data and isinstance(data['city'], str)
+        and 'country' in data and isinstance(data['country'], str)
+        ):
+        if(len(data['password']) > 5 and len(data['password']) < 21 and len(data['email']) > 0
+        and len(data['firstname']) > 0 and len(data['familyname']) > 0 and len(data['gender']) > 0
+        and len(data['city']) > 0 and len(data['country']) > 0 ):
+            resp = database_helper.create_user(data['email'], data['password'], data['firstname'],
+            data['familyname'], data['gender'], data['city'], data['country'])
+            if resp:
+                return "", 201
+            else:
+                return "", 409
+        else:
+            return "", 400
+    else:
+        return "test", 400
+
+
+
+@app.route("/delete", methods = ['GET'])
+def delete():
+    resp = database_helper.clean_db()
+    if resp:
+        return "", 200
+    else:
+        return "", 409
+
+
+if __name__ == '__main__':
+    app.debug = True
+    app.run()