Simplified student import process

stages/forms.py

@@ -1,8 +1,29 @@
 from django import forms
+from django.conf import settings
+
+from tabimport import FileFactory, UnsupportedFileFormat
 
 from .models import Section, Period
 
 
+class StudentImportForm(forms.Form):
+    upload = forms.FileField(label="Fichier des étudiants")
+
+    def clean_upload(self):
+        f = self.cleaned_data['upload']
+        try:
+            imp_file = FileFactory(f)
+        except UnsupportedFileFormat as e:
+            raise forms.ValidationError("Erreur: %s" % e)
+        # Check needed headers are present
+        headers = imp_file.get_headers()
+        missing = set(settings.STUDENT_IMPORT_MAPPING.keys()) - set(headers)
+        if missing:
+            raise forms.ValidationError("Erreur: il manque les colonnes %s" % (
+                ", ".join(missing)))
+        return f
+
+
 class PeriodForm(forms.Form):
     section = forms.ModelChoiceField(queryset=Section.objects.all())
     period = forms.ModelChoiceField(queryset=None)