refactor(backend): Remove custom role admin (#9500)

See https://github.com/inventree/InvenTree/pull/9476#issuecomment-2791584989

src/backend/InvenTree/users/admin.py

@@ -1,7 +1,7 @@
 """Admin classes for the 'users' app."""
 
 from django import forms
-from django.contrib import admin, messages
+from django.contrib import admin
 from django.contrib.admin.widgets import FilteredSelectMultiple
 from django.contrib.auth import get_user_model
 from django.contrib.auth.admin import UserAdmin
@@ -115,157 +115,6 @@ class InvenTreeGroupAdminForm(forms.ModelForm):
         return instance
 
 
-class RoleGroupAdmin(admin.ModelAdmin):  # pragma: no cover
-    """Custom admin interface for the Group model."""
-
-    form = InvenTreeGroupAdminForm
-
-    inlines = [RuleSetInline]
-
-    list_display = (
-        'name',
-        'admin',
-        'part_category',
-        'part',
-        'stocktake',
-        'stock_location',
-        'stock_item',
-        'build',
-        'purchase_order',
-        'sales_order',
-        'return_order',
-    )
-
-    def get_rule_set(self, obj, rule_set_type):
-        """Return list of permissions for the given ruleset."""
-        # Get all rulesets associated to object
-        rule_sets = RuleSet.objects.filter(group=obj.pk)
-
-        # Select ruleset based on type
-        for rule_set in rule_sets:
-            if rule_set.name == rule_set_type:
-                break
-
-        def append_permission_level(permission_level, next_level):
-            """Append permission level."""
-            if not permission_level:
-                return next_level
-
-            if permission_level[:-1].endswith('|'):
-                permission_level += next_level
-            else:
-                permission_level += ' | ' + next_level
-
-            return permission_level
-
-        permission_level = ''
-
-        if rule_set.can_view:
-            permission_level = append_permission_level(permission_level, 'V')
-
-        if rule_set.can_add:
-            permission_level = append_permission_level(permission_level, 'A')
-
-        if rule_set.can_change:
-            permission_level = append_permission_level(permission_level, 'C')
-
-        if rule_set.can_delete:
-            permission_level = append_permission_level(permission_level, 'D')
-
-        return permission_level
-
-    def admin(self, obj):
-        """Return the ruleset for the admin role."""
-        return self.get_rule_set(obj, 'admin')
-
-    def part_category(self, obj):
-        """Return the ruleset for the PartCategory role."""
-        return self.get_rule_set(obj, 'part_category')
-
-    def part(self, obj):
-        """Return the ruleset for the Part role."""
-        return self.get_rule_set(obj, 'part')
-
-    def stocktake(self, obj):
-        """Return the ruleset for the Stocktake role."""
-        return self.get_rule_set(obj, 'stocktake')
-
-    def stock_location(self, obj):
-        """Return the ruleset for the StockLocation role."""
-        return self.get_rule_set(obj, 'stock_location')
-
-    def stock_item(self, obj):
-        """Return the ruleset for the StockItem role."""
-        return self.get_rule_set(obj, 'stock')
-
-    def build(self, obj):
-        """Return the ruleset for the BuildOrder role."""
-        return self.get_rule_set(obj, 'build')
-
-    def purchase_order(self, obj):
-        """Return the ruleset for the PurchaseOrder role."""
-        return self.get_rule_set(obj, 'purchase_order')
-
-    def sales_order(self, obj):
-        """Return the ruleset for the SalesOrder role."""
-        return self.get_rule_set(obj, 'sales_order')
-
-    def return_order(self, obj):
-        """Return the ruleset ofr the ReturnOrder role."""
-        return self.get_rule_set(obj, 'return_order')
-
-    def get_formsets_with_inlines(self, request, obj=None):
-        """Retrieve all inline formsets for the given request and object.
-
-        Args:
-            request (HttpRequest): The HTTP request object.
-            obj (Model, optional): The model instance for which the formsets are being retrieved. Defaults to None.
-
-        Yields:
-            tuple: A tuple containing the formset and the corresponding inline instance.
-        """
-        for inline in self.get_inline_instances(request, obj):
-            # Hide RuleSetInline in the 'Add role' view
-            if not isinstance(inline, RuleSetInline) or obj is not None:
-                yield inline.get_formset(request, obj), inline
-
-    filter_horizontal = ['permissions']
-
-    def save_model(self, request, obj, form, change):
-        """Save overwrite.
-
-        This method serves two purposes:
-            - show warning message whenever the group users belong to multiple groups
-            - skip saving of the group instance model as inlines needs to be saved before.
-        """
-        # Get form cleaned data
-        users = form.cleaned_data['users']
-
-        # Check for users who are members of multiple groups
-        multiple_group_users = []
-
-        for user in users:
-            if user.groups.all().count() > 1:
-                multiple_group_users.append(user.username)
-
-        # If any, display warning message when group is saved
-        if len(multiple_group_users) > 0:
-            msg = (
-                _('The following users are members of multiple groups')
-                + ': '
-                + ', '.join(multiple_group_users)
-            )
-
-            messages.add_message(request, messages.WARNING, msg)
-
-    def save_formset(self, request, form, formset, change):
-        """Save the inline formset."""
-        # Save inline Rulesets
-        formset.save()
-        # Save Group instance and update permissions
-        form.instance.save(update_fields=['name'])
-
-
 class InvenTreeUserAdmin(UserAdmin):
     """Custom admin page for the User model.
 
@@ -301,8 +150,5 @@ class OwnerAdmin(admin.ModelAdmin):
     search_fields = ['name']
 
 
-admin.site.unregister(Group)
-admin.site.register(Group, RoleGroupAdmin)
-
 admin.site.unregister(User)
 admin.site.register(User, InvenTreeUserAdmin)