Add manage invites page.

fedireads/forms.py

@@ -1,5 +1,8 @@
 ''' usin django model forms '''
-from django.forms import ModelForm, PasswordInput, HiddenInput
+import datetime
+
+from django.core.exceptions import ValidationError
+from django.forms import ModelForm, PasswordInput, widgets
 from django import forms
 
 from fedireads import models
@@ -115,3 +118,35 @@ class EditionForm(ModelForm):
 
 class ImportForm(forms.Form):
     csv_file = forms.FileField()
+
+class ExpiryWidget(widgets.Select):
+    def value_from_datadict(self, data, files, name):
+        selected_string = super().value_from_datadict(data, files, name)
+
+        if selected_string == 'day':
+            interval = datetime.timedelta(days=1)
+        elif selected_string == 'week':
+            interval = datetime.timedelta(days=7)
+        elif selected_string == 'month':
+            interval = datetime.timedelta(days=31) # Close enough?
+        elif selected_string == 'forever':
+            return None
+        else:
+            return selected_string # "This will raise
+
+        return datetime.datetime.now() + interval
+
+class CreateInviteForm(ModelForm):
+    class Meta:
+        model = models.SiteInvite
+        exclude = ['code', 'user', 'times_used']
+        widgets = {
+            'expiry': ExpiryWidget(choices=[
+                ('day', 'One Day'),
+                ('week', 'One Week'),
+                ('month', 'One Month'),
+                ('forever', 'Does Not Expire')]),
+            'use_limit': widgets.Select(
+                choices=[(i, "%d uses" % (i,)) for i in [1, 5, 10, 25, 50, 100]]
+                + [(None, 'Unlimited')])
+        }