Added comments

api/app/blueprints/keyword.py

@@ -31,9 +31,10 @@ def add_keyword(data):
 
     key = data['keyword']
 
+    # Check if keyword already exists
     check_keyword = db.session.query(Keyword).filter_by(keyword=key, email=email).first()
     if check_keyword is None:
-        # Keyword doesn't exist yet for this user
+        # Keyword doesn't exist yet for this user -> add it
         new_keyword = Keyword(
             email=email,
             keyword=key
@@ -54,17 +55,17 @@ def add_keyword(data):
 def remove_keyword(data):
     email = get_email_or_abort_401()
 
+    # Check if request data is valid
     if not check_if_keyword_data_exists(data):
         abort(400, message="Keyword missing")
 
-    key = data['keyword']
-
-    check_keyword = db.session.query(Keyword).filter_by(keyword=key, email=email).first()
-
+    # Check if keyword exists
+    check_keyword = db.session.query(Keyword).filter_by(keyword=data['keyword'], email=email).first()
     if check_keyword is None:
         return abort(500, "Keyword doesn't exist for this user")
     else:
-        db.session.query(Keyword).filter_by(keyword=key, email=email).delete()
+        # Keyword exists -> delete it
+        db.session.query(Keyword).filter_by(keyword=data['keyword'], email=email).delete()
         db.session.commit()
 
         return make_response({}, 200, "Successfully removed keyword")
@@ -80,6 +81,8 @@ def get_keywords():
     return_keywords = []
     keywords = db.session.query(Keyword).filter_by(email=email).all()
 
+    # If no keywords exist for this user -> return empty list
+    # Otherwise iterate over all keywords, convert them to json and add them to the return list
     if keywords is not None:
         for row in keywords:
             return_keywords.append(row.as_dict())