Not Accepted invites page for admins

gsoc/admin.py

@@ -772,3 +772,24 @@ class GsocYearAdmin(admin.ModelAdmin):
 admin.site.register(GsocYear, GsocYearAdmin)
 
 admin.site.register(SubOrg)
+
+
+class NotAcceptedAdmin(admin.ModelAdmin):
+    list_display = ("email", "user_suborg", "user_role")
+    list_filter = ("user_suborg", "user_role")
+
+    def get_queryset(self, request):
+        accepted_users = RegLink.objects.filter(is_used=True).values('email')
+        accepted_emails = [item['email'] for item in accepted_users]
+        not_accepted_users = \
+            RegLink.objects.filter(gsoc_year=datetime.now().year).exclude(email__in=accepted_emails)
+        return not_accepted_users
+
+    def has_add_permission(self, request, obj=None):
+        return False
+
+    def has_change_permission(self, request, obj=None):
+        return False
+
+
+admin.site.register(NotAcceptedUser, NotAcceptedAdmin)

gsoc/migrations/0006_notaccepteduser.py

@@ -0,0 +1,24 @@
+# Generated by Django 3.1.13 on 2022-06-02 16:56
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('gsoc', '0005_suborgprofile'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='NotAcceptedUser',
+            fields=[
+            ],
+            options={
+                'proxy': True,
+                'indexes': [],
+                'constraints': [],
+            },
+            bases=('gsoc.reglink',),
+        ),
+    ]

gsoc/models.py

@@ -1196,6 +1196,11 @@ def save(self, *args, **kwargs):
         super(SendEmail, self).save(*args, **kwargs)
 
 
+class NotAcceptedUser(RegLink):
+    class Meta:
+        proxy = True
+
+
 # Receivers
 
 # Update blog count when new UserProfile is created