Update pre.py

pre.py

@@ -30,4 +30,22 @@ def load_data(file):
 
 def fill_missing_data(data, column_index, value):
     data.iloc[:, column_index] = data.iloc[:, column_index].fillna(value)
+    return data
+
+# Define a function to convert a string to camel case
+def to_camel_case(s):
+    parts = s.split('_')
+    return ''.join([part.capitalize() for part in parts])
+
+# Define the function to preprocess a CSV file
+def preprocess_uploaded_file(uploaded_file):
+    file_content = uploaded_file.read()
+    processed_output = preprocess_csv(file_content)
+    processed_file = io.StringIO(processed_output.getvalue())
+    data = load_data(processed_file)
+    data = fill_missing_data(data, 4, 0)
+    data['Start datetime'] = pd.to_datetime(data['Start datetime'], errors='coerce')
+    data['End datetime'] = pd.to_datetime(data['End datetime'], errors='coerce')
+    data['Time spent'] = (data['End datetime'] - data['Start datetime']).dt.total_seconds()
+    data['Time spent(m:s)'] = pd.to_datetime(data['Time spent'], unit='s').dt.strftime('%M:%S')
     return data