headless

Headless.py

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+import pyodbc
+from datetime import datetime,  timedelta
+
+SERVER = '<server name or IP>'
+DATABASE = '<db name>'
+USERNAME = '<db username>'
+PASSWORD = '<db password>'
+PORT='1433'
+
+connection_string = f'DRIVER={{ODBC Driver 17 for SQL Server}};SERVER={SERVER};PORT={PORT};DATABASE={DATABASE};UID={USERNAME};PWD={PASSWORD};TrustServerCertificate=yes'
+db_connection = pyodbc.connect(connection_string) 
+cursor = db_connection.cursor()
+
+#Set default values 
+sign_in_date_time_check = datetime.fromtimestamp(0)
+card_code_check = False
+ 
+while True:
+    #Get from card when inputed - card id will be a string
+    card_code_input = input()
+
+    date_time_now = datetime.now()
+    time_now = date_time_now.time()
+
+    #Find user in the database used only for checking that the user exists
+    cursor.execute('SELECT SignInTime FROM EmployeeRegister WHERE CardID = ?', card_code_input)
+    db_user_entry = cursor.fetchall()
+    db_sign_in_time = db_user_entry[0][0]
+
+    #if no user info is returned and thus user does not exist reset loop
+    if not db_user_entry:
+        print('User does not exist')
+        continue
+
+    #Prevent double tap of card
+    if card_code_input == card_code_check and sign_in_date_time_check > date_time_now:
+        print('Double tap prevented')
+        continue
+
+    #Save sign in/sign out card code and time + 5 seconds
+    sign_in_date_time_check = date_time_now + timedelta(seconds = 50)
+    card_code_check = card_code_input
+
+
+    #If user is signed in sign them out
+    if db_sign_in_time:
+        print('Signed Out')
+        cursor.execute('UPDATE EmployeeRegister SET SignInTime = ? WHERE CardID = ?', None, card_code_input)
+        db_connection.commit()
+        continue
+    
+    print('Database updated')
+    #Update database with sign in time
+    cursor.execute('UPDATE EmployeeRegister SET SignInTime = ? WHERE CardID = ?', time_now, card_code_input)
+    db_connection.commit()
+    
+
+