Validate service and organisation name

app/main/forms.py

@@ -40,6 +40,7 @@ from app.main.validators import (
     CsvFileValidator,
     DoesNotStartWithDoubleZero,
     LettersNumbersAndFullStopsOnly,
+    MustContainAlphanumericCharacters,
     NoCommasInPlaceHolders,
     OnlySMSCharacters,
     ValidEmail,
@@ -547,7 +548,8 @@ class RenameServiceForm(StripWhitespaceForm):
     name = StringField(
         u'Service name',
         validators=[
-            DataRequired(message='Cannot be empty')
+            DataRequired(message='Cannot be empty'),
+            MustContainAlphanumericCharacters()
         ])
 
 
@@ -555,7 +557,8 @@ class RenameOrganisationForm(StripWhitespaceForm):
     name = StringField(
         u'Organisation name',
         validators=[
-            DataRequired(message='Cannot be empty')
+            DataRequired(message='Cannot be empty'),
+            MustContainAlphanumericCharacters()
         ])
 
 
@@ -662,7 +665,8 @@ class CreateServiceForm(StripWhitespaceForm):
     name = StringField(
         "What’s your service called?",
         validators=[
-            DataRequired(message='Cannot be empty')
+            DataRequired(message='Cannot be empty'),
+            MustContainAlphanumericCharacters()
         ])
     organisation_type = OrganisationTypeField('Who runs this service?')
 

app/main/validators.py

@@ -111,3 +111,18 @@ class DoesNotStartWithDoubleZero:
     def __call__(self, form, field):
         if field.data and field.data.startswith("00"):
             raise ValidationError(self.message)
+
+
+class MustContainAlphanumericCharacters:
+
+    regex = re.compile(r".*[a-zA-Z0-9].*[a-zA-Z0-9].*")
+
+    def __init__(
+        self,
+        message="Must include at least two alphanumeric characters"
+    ):
+        self.message = message
+
+    def __call__(self, form, field):
+        if field.data and not re.match(self.regex, field.data):
+            raise ValidationError(self.message)

tests/app/main/test_validators.py

@@ -5,6 +5,7 @@ from wtforms import ValidationError
 
 from app.main.forms import RegisterUserForm, ServiceSmsSenderForm
 from app.main.validators import (
+    MustContainAlphanumericCharacters,
     NoCommasInPlaceHolders,
     OnlySMSCharacters,
     ValidGovEmail,
@@ -179,6 +180,19 @@ def test_non_sms_character_validation(data, err_msg, client):
     assert str(error.value) == err_msg
 
 
+@pytest.mark.parametrize("string", [".", "A.", ".8...."])
+def test_if_string_does_not_contain_alphanumeric_characters_raises(string):
+    with pytest.raises(ValidationError) as error:
+        MustContainAlphanumericCharacters()(None, _gen_mock_field(string))
+
+    assert str(error.value) == "Must include at least two alphanumeric characters"
+
+
+@pytest.mark.parametrize("string", [".A8", "AB.", ".42...."])
+def test_if_string_contains_alphanumeric_characters_does_not_raise(string):
+    MustContainAlphanumericCharacters()(None, _gen_mock_field(string))
+
+
 def test_sms_sender_form_validation(
     client,
     mock_get_user_by_email,

tests/app/main/views/organisations/test_organisation.py

@@ -160,6 +160,29 @@ def test_create_new_organisation_validates(
     assert mock_create_organisation.called is False
 
 
+def test_create_new_organisation_fails_if_new_name_has_less_than_2_alphanumeric_characters(
+    client_request,
+    platform_admin_user,
+    mocker,
+):
+    mock_create_organisation = mocker.patch(
+        'app.organisations_client.create_organisation'
+    )
+
+    client_request.login(platform_admin_user)
+    page = client_request.post(
+        '.add_organisation',
+        _data={
+            'name': ".",
+            'organisation_type': 'local',
+            'crown_status': 'non-crown',
+        },
+        _expected_status=200,
+    )
+    assert mock_create_organisation.called is False
+    assert page.find("span", {"class": "error-message"})
+
+
 @pytest.mark.parametrize('organisation_type, organisation, expected_status', (
     ('nhs_gp', None, 200),
     ('central', None, 403),

tests/app/main/views/test_add_service.py

@@ -277,6 +277,18 @@ def test_should_return_form_errors_when_service_name_is_empty(
     assert 'Cannot be empty' in page.text
 
 
+def test_add_service_fails_if_service_name_has_less_than_2_alphanumeric_characters(
+    client_request,
+    mock_get_organisation_by_domain,
+):
+    page = client_request.post(
+        'main.add_service',
+        data={"name": "."},
+        _expected_status=200,
+    )
+    assert page.find("span", {"class": "error-message"})
+
+
 def test_should_return_form_errors_with_duplicate_service_name_regardless_of_case(
     client_request,
     mock_create_duplicate_service,

tests/app/main/views/test_service_settings.py

@@ -397,6 +397,22 @@ def test_should_not_hit_api_if_service_name_hasnt_changed(
     assert not mock_update_service.called
 
 
+def test_service_name_change_fails_if_new_name_has_less_than_2_alphanumeric_characters(
+    client_request,
+    mock_update_service,
+    mock_service_name_is_unique,
+):
+    page = client_request.post(
+        'main.service_name_change',
+        service_id=SERVICE_ONE_ID,
+        _data={'name': "."},
+        _expected_status=200,
+    )
+    assert not mock_service_name_is_unique.called
+    assert not mock_update_service.called
+    assert page.find("span", {"class": "error-message"})
+
+
 @pytest.mark.parametrize('user, expected_text, expected_link', [
     (
         active_user_with_permissions,