feat: discourage URLs in Person names (#7453)

* feat: disallow @ and : in name/ascii

@ has long been disallowed via validation in the
views and "/" has been disallowed for the name
field via a validator. This adds @ and : to the
validator and applies it to the name, plain,
ascii, and ascii_short fields. This should
apply everywhere we use a ModelForm.

* test: update test

* chore: migration

ietf/person/migrations/0002_alter_historicalperson_ascii_and_more.py

@@ -0,0 +1,82 @@
+# Generated by Django 4.2.13 on 2024-05-22 18:50
+
+from django.db import migrations, models
+import ietf.person.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("person", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="historicalperson",
+            name="ascii",
+            field=models.CharField(
+                help_text="Name as rendered in ASCII (Latin, unaccented) characters.",
+                max_length=255,
+                validators=[ietf.person.models.name_character_validator],
+                verbose_name="Full Name (ASCII)",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="historicalperson",
+            name="ascii_short",
+            field=models.CharField(
+                blank=True,
+                help_text="Example: A. Nonymous.  Fill in this with initials and surname only if taking the initials and surname of the ASCII name above produces an incorrect initials-only form. (Blank is OK).",
+                max_length=32,
+                null=True,
+                validators=[ietf.person.models.name_character_validator],
+                verbose_name="Abbreviated Name (ASCII)",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="historicalperson",
+            name="plain",
+            field=models.CharField(
+                blank=True,
+                default="",
+                help_text="Use this if you have a Spanish double surname.  Don't use this for nicknames, and don't use it unless you've actually observed that the datatracker shows your name incorrectly.",
+                max_length=64,
+                validators=[ietf.person.models.name_character_validator],
+                verbose_name="Plain Name correction (Unicode)",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="person",
+            name="ascii",
+            field=models.CharField(
+                help_text="Name as rendered in ASCII (Latin, unaccented) characters.",
+                max_length=255,
+                validators=[ietf.person.models.name_character_validator],
+                verbose_name="Full Name (ASCII)",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="person",
+            name="ascii_short",
+            field=models.CharField(
+                blank=True,
+                help_text="Example: A. Nonymous.  Fill in this with initials and surname only if taking the initials and surname of the ASCII name above produces an incorrect initials-only form. (Blank is OK).",
+                max_length=32,
+                null=True,
+                validators=[ietf.person.models.name_character_validator],
+                verbose_name="Abbreviated Name (ASCII)",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="person",
+            name="plain",
+            field=models.CharField(
+                blank=True,
+                default="",
+                help_text="Use this if you have a Spanish double surname.  Don't use this for nicknames, and don't use it unless you've actually observed that the datatracker shows your name incorrectly.",
+                max_length=64,
+                validators=[ietf.person.models.name_character_validator],
+                verbose_name="Plain Name correction (Unicode)",
+            ),
+        ),
+    ]

ietf/person/models.py

@@ -37,8 +37,12 @@ from ietf.utils.models import ForeignKey, OneToOneField
 
 
 def name_character_validator(value):
-    if '/' in value:
-        raise ValidationError('Name cannot contain "/" character.')
+    disallowed = "@:/"
+    found = set(disallowed).intersection(value)
+    if len(found) > 0:
+        raise ValidationError(
+            f"This name cannot contain the characters {', '.join(disallowed)}"
+        )
 
 
 class Person(models.Model):
@@ -48,11 +52,11 @@ class Person(models.Model):
     # The normal unicode form of the name.  This must be
     # set to the same value as the ascii-form if equal.
     name = models.CharField("Full Name (Unicode)", max_length=255, db_index=True, help_text="Preferred long form of name.", validators=[name_character_validator])
-    plain = models.CharField("Plain Name correction (Unicode)", max_length=64, default='', blank=True, help_text="Use this if you have a Spanish double surname.  Don't use this for nicknames, and don't use it unless you've actually observed that the datatracker shows your name incorrectly.")
+    plain = models.CharField("Plain Name correction (Unicode)", max_length=64, default='', blank=True, help_text="Use this if you have a Spanish double surname.  Don't use this for nicknames, and don't use it unless you've actually observed that the datatracker shows your name incorrectly.", validators=[name_character_validator])
     # The normal ascii-form of the name.
-    ascii = models.CharField("Full Name (ASCII)", max_length=255, help_text="Name as rendered in ASCII (Latin, unaccented) characters.")
+    ascii = models.CharField("Full Name (ASCII)", max_length=255, help_text="Name as rendered in ASCII (Latin, unaccented) characters.", validators=[name_character_validator])
     # The short ascii-form of the name.  Also in alias table if non-null
-    ascii_short = models.CharField("Abbreviated Name (ASCII)", max_length=32, null=True, blank=True, help_text="Example: A. Nonymous.  Fill in this with initials and surname only if taking the initials and surname of the ASCII name above produces an incorrect initials-only form. (Blank is OK).")
+    ascii_short = models.CharField("Abbreviated Name (ASCII)", max_length=32, null=True, blank=True, help_text="Example: A. Nonymous.  Fill in this with initials and surname only if taking the initials and surname of the ASCII name above produces an incorrect initials-only form. (Blank is OK).", validators=[name_character_validator])
     pronouns_selectable = jsonfield.JSONCharField("Pronouns", max_length=120, blank=True, null=True, default=list )
     pronouns_freetext = models.CharField(" ", max_length=30, null=True, blank=True, help_text="Optionally provide your personal pronouns. These will be displayed on your public profile page and alongside your name in Meetecho and, in future, other systems. Select any number of the checkboxes OR provide a custom string up to 30 characters.")
     biography = models.TextField(blank=True, help_text="Short biography for use on leadership pages. Use plain text or reStructuredText markup.")

ietf/person/tests.py

@@ -246,9 +246,11 @@ class PersonTests(TestCase):
         self.assertNotIn('cdn-cgi/photo',p.cdn_photo_url())
 
     def test_invalid_name_characters_rejected(self):
-        slash_person = PersonFactory.build(name='I have a /', user=None)  # build() does not save the new object
-        with self.assertRaises(ValidationError):
-            slash_person.full_clean()  # calls validators (save() does *not*)
+        for disallowed in "/:@":
+            # build() does not save the new object
+            person_with_bad_name = PersonFactory.build(name=f"I have a {disallowed}", user=None)
+            with self.assertRaises(ValidationError, msg=f"Name with a {disallowed} char should be rejected"):
+                person_with_bad_name.full_clean()  # calls validators (save() does *not*)
 
 
 class PersonUtilsTests(TestCase):