user addition

allfence.py

@@ -1,10 +1,32 @@
-from hashlib import sha256
+import bcrypt
 
 def create_user(db, login_info, user_info):
-    pass
 
-def update_user(db, login_info, user_info):
-    pass
+    """
+    Creates a new user
+    
+    Parameters:
+    db (psycopg2.connection): connection to postgres database
+    login_info (dict of str:int): username and password info
+    user_info (dict of str:int): name and dob info
+
+    Returns:
+    bool: success of user creation
+    str: result message
+    """
+
+    username, password = login_info["username"], login_info["password"]
+    password_hash = bcrypt.hashpw(password.encode(), bcrypt.gensalt()).decode()
+    name, dob = user_info["name"], user_info["dob"]
+    with db:
+        with db.cursor() as curs:
+            curs.execute("SELECT * FROM Users WHERE username = %s", (username,))
+            conflicts = curs.fetchall()
+            if conflicts:
+                return False, "Duplicate username"
+            curs.execute("INSERT INTO Users (username, password_hash, name, dob) VALUES (%s, %s, %s, %s)", (username, password_hash, name, dob))
+        db.commit()
+    return True, "Success"
 
 def get_user(db, id):
     pass