input file validator

app/util/validator.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3.11
+from app.util.globals import Error
+
+def validateInputData(inputFileDir: str) -> Error:
+  with open(inputFileDir, newline='') as csvfile:
+    includes = ['Pupil #', 'CrsNo', 'Description', 'Alternate?']
+    data = csvfile.readline().replace('\n', '').split(',')
+    missing = [e for e in includes if e not in data]
+    if len(missing) > 0:
+      description = 'You are missing the following: '
+      for i in range(len(missing)):
+        if i != len(missing) - 1: description += f'{missing[i]}, '
+        else: description += f'{missing[i]}'
+      missingErr = Error('Missing Required Fields', description)
+
+      return missingErr
+    
+  return None