Remove special chars from side identifiers

media/forms.py

@@ -4,6 +4,7 @@
 
 import json
 import urllib.request
+import unicodedata
 
 from django.forms import ModelForm
 
@@ -102,8 +103,8 @@ class MediaAdminForm(ModelForm):
                     if ',' not in author_name and ' ' in author_name:
                         author_name = author_name.split(' ')[1]
                     side_identifier = "{:.3} {:.3}".format(
-                        author_name.upper(),
-                        self.cleaned_data['title'].upper(), )
+                        author_name,
+                        self.cleaned_data['title'], )
 
                     if self.cleaned_data['subtitle']:
                         start = self.cleaned_data['subtitle'].split(' ')[0] \
@@ -112,6 +113,13 @@ class MediaAdminForm(ModelForm):
                         if start.isnumeric():
                             side_identifier += " {:0>2}".format(start, )
 
+                    # Normalize side identifier, in order to remove accents
+                    side_identifier = ''.join(
+                        char
+                        for char in unicodedata.normalize('NFKD', side_identifier.casefold())
+                        if all(not unicodedata.category(char).startswith(cat)
+                               for cat in {'M', 'P', 'Z', 'C'}) or char == ' '
+                    ).casefold().upper()
                     self.cleaned_data['side_identifier'] = side_identifier
 
         return self.cleaned_data