Merged in ^/branch/iola/account-ascii-fixes-r11748 from olau@iola.dk:

 - Added a check for a reserved name in account registration
 - Handle Person.ascii in edit profile better to try to ensure that
   people fill it in correctly. Blank it out if it's unchanged from name
   and use unidecode to set it automatically (with a warning if it
   actually converts something).
 - Throw a validation error if a profile name contains an @ sign upon
   edit so that people do not forget to enter their name.
 - Legacy-Id: 11791

Author: levkowetz

ietf/ietfauth/forms.py

@@ -9,6 +9,8 @@
 from django.utils.html import mark_safe
 from django.core.urlresolvers import reverse as urlreverse
 
+from unidecode import unidecode
+
 import debug                            # pyflakes:ignore
 
 from ietf.person.models import Person, Email
@@ -45,9 +47,18 @@ def clean_password_confirmation(self):
 def ascii_cleaner(supposedly_ascii):
     outside_printable_ascii_pattern = r'[^\x20-\x7F]'
     if re.search(outside_printable_ascii_pattern, supposedly_ascii):
-        raise forms.ValidationError("Please only enter ASCII characters.")
+        raise forms.ValidationError("Only unaccented Latin characters are allowed.")
     return supposedly_ascii
 
+def prevent_at_symbol(name):
+    if "@" in name:
+        raise forms.ValidationError("Please fill in name - this looks like an email address (@ is not allowed in names).")
+
+def prevent_system_name(name):
+    name_without_spaces = name.replace(" ", "").replace("\t", "")
+    if "(system)" in name_without_spaces.lower():
+        raise forms.ValidationError("Please pick another name - this name is reserved.")
+
 def get_person_form(*args, **kwargs):
 
     exclude_list = ['time', 'user', 'photo_thumb', 'photo', ]
@@ -65,11 +76,42 @@ class Meta:
         def __init__(self, *args, **kwargs):
             super(ModelForm, self).__init__(*args, **kwargs)
 
+            # blank ascii if it's the same as name
+            self.fields["ascii"].required = self.fields["ascii"].widget.is_required = False
+            self.fields["ascii"].help_text += " " + "Leave blank to use auto-reconstructed Latin version of name."
+
+            if self.initial.get("ascii") == self.initial.get("name"):
+                self.initial["ascii"] = ""
+
+            self.unidecoded_ascii = False
+
+            if self.data and not self.data.get("ascii", "").strip():
+                self.data = self.data.copy()
+                name = self.data["name"]
+                reconstructed_name = unidecode(name)
+                self.data["ascii"] = reconstructed_name
+                self.unidecoded_ascii = name != reconstructed_name
+
+        def clean_name(self):
+            name = self.cleaned_data.get("name") or u""
+            prevent_at_symbol(name)
+            prevent_system_name(name)
+            return name
+
         def clean_ascii(self):
-            return ascii_cleaner(self.cleaned_data.get("ascii") or u"")
+            if self.unidecoded_ascii:
+                raise forms.ValidationError("Name contained non-ASCII characters, and was automatically reconstructed using only Latin characters. Check the result - if you are happy, just hit Submit again.")
+
+            name = self.cleaned_data.get("ascii") or u""
+            prevent_at_symbol(name)
+            prevent_system_name(name)
+            return ascii_cleaner(name)
 
         def clean_ascii_short(self):
-            return ascii_cleaner(self.cleaned_data.get("ascii_short") or u"")
+            name = self.cleaned_data.get("ascii_short") or u""
+            prevent_at_symbol(name)
+            prevent_system_name(name)
+            return ascii_cleaner(name)
 
     return PersonForm(*args, **kwargs)
 

ietf/ietfauth/tests.py

@@ -213,6 +213,15 @@ def test_profile(self):
         q = PyQuery(r.content)
         self.assertTrue(len(q("form .has-error")) > 0)
 
+        # edit details - blank ASCII
+        blank_ascii = base_data.copy()
+        blank_ascii["ascii"] = u""
+        r = self.client.post(url, blank_ascii)
+        self.assertEqual(r.status_code, 200)
+        q = PyQuery(r.content)
+        self.assertTrue(len(q("form .has-error")) > 0) # we get a warning about reconstructed name
+        self.assertEqual(q("input[name=ascii]").val(), base_data["ascii"])
+
         # edit details
         r = self.client.post(url, base_data)
         self.assertEqual(r.status_code, 200)