Added app.py

Author: debugleader

app.py

@@ -0,0 +1,85 @@
+import mysql.connector
+
+database_connection = False
+running = True
+pass_weak = False
+login_status = False
+
+def database_connect(host_v,usr,password,datab):
+    global database_connection, db, mycursor
+    try:
+        db = mysql.connector.connect(
+            host=host_v,
+            user=usr,
+            passwd=password,
+            database=datab
+        )
+        mycursor = db.cursor()
+        if db:
+            database_connection = True
+            return "Connection to the database is working"
+    except:
+        return "Connection to the database wasn't successful"
+    
+def setup_database_connection():
+    global database_connection
+    host_v = input("Input the hostname (Type localhost if you're not sure): ")
+    usr = input("Input the database user: ")
+    password = input("Input the database password: ")
+    datab = input("Input the database name: ")
+    print(database_connect(host_v,usr,password,datab))
+    if database_connection == False:
+        exit() 
+
+print("Welcome to Login System v1.2!")
+print("")
+while running:
+    if not database_connection:
+        setup_database_connection()
+    print("")
+    print("1) Create a table (Mandatory before registering or logging in): ")
+    print("2) Register")
+    print("3) Login")
+    print("4) Quit")
+    print("")
+    user_input = input("Input a number: ")
+    if user_input == str(4):
+        print("")
+        print("Thank you for using our program!")
+        exit()
+    elif user_input == str(1):
+        try:
+            mycursor.execute("CREATE TABLE system_data (name VARCHAR(20), password VARCHAR(20), personID int PRIMARY KEY AUTO_INCREMENT)")
+        except: 
+            print("Table already created or something else went wrong!")
+    elif user_input == str(2):
+        register_name = input("Input your name: ")
+        while not pass_weak:
+            register_passwd = input("Input your password: ")
+            if len(register_passwd) > 8:
+                mycursor.execute(f"INSERT INTO system_data (name,password) VALUES ('{register_name}','{register_passwd}')")
+                db.commit()
+                pass_weak = True
+                print("")
+                print(f"Congratulations! Your name is {register_name} and your password is {register_passwd}!")
+            else:
+                print("Weak password, please type more than 8 characters!")
+    elif user_input == str(3):
+
+        mycursor.execute("SELECT * FROM system_data")
+        credentials = []
+        for x in mycursor:
+            credentials.append(x)
+        while not login_status:
+            login_name = input("Input your name: ")
+            login_passwd = input("Input your password: ")
+            if login_name == x[0]:
+                if login_passwd == x[1]:
+                    print("")
+                    print("You successfully logged in, thank you really much for using our system :)")
+                    exit()
+                else:
+                    print("Sorry, wrong password!")
+                    print(mycursor)
+            else: 
+                print("Sorry, no such username!")