Add support for editing labelling of one's own role (#18812)

Still disallow edition of rank or permissions

app/models/user_role.rb

@@ -90,6 +90,7 @@ class UserRole < ApplicationRecord
   validate :validate_permissions_elevation
   validate :validate_position_elevation
   validate :validate_dangerous_permissions
+  validate :validate_own_role_edition
 
   before_validation :set_position
 
@@ -165,6 +166,12 @@ class UserRole < ApplicationRecord
     self.position = -1 if everyone?
   end
 
+  def validate_own_role_edition
+    return unless defined?(@current_account) && @current_account.user_role.id == id
+    errors.add(:permissions_as_keys, :own_role) if permissions_changed?
+    errors.add(:position, :own_role) if position_changed?
+  end
+
   def validate_permissions_elevation
     errors.add(:permissions_as_keys, :elevated) if defined?(@current_account) && @current_account.user_role.computed_permissions & permissions != permissions
   end

app/policies/user_role_policy.rb

@@ -10,7 +10,7 @@ class UserRolePolicy < ApplicationPolicy
   end
 
   def update?
-    role.can?(:manage_roles) && role.overrides?(record)
+    role.can?(:manage_roles) && (role.overrides?(record) || role.id == record.id)
   end
 
   def destroy?

app/views/admin/roles/_form.html.haml

@@ -8,6 +8,7 @@
     .fields-group
       = f.input :name, wrapper: :with_label
 
+    - unless current_user.role.id == @role.id
       .fields-group
         = f.input :position, wrapper: :with_label, input_html: { max: current_user.role.position - 1 }
 
@@ -21,6 +22,8 @@
 
     %hr.spacer/
 
+  - unless current_user.role.id == @role.id
+
     .field-group
       .input.with_block_label
         %label= t('simple_form.labels.user_role.permissions_as_keys')

config/locales/activerecord.en.yml

@@ -45,5 +45,7 @@ en:
             permissions_as_keys:
               dangerous: include permissions that are not safe for the base role
               elevated: cannot include permissions your current role does not possess
+              own_role: cannot be changed with your current role
             position:
               elevated: cannot be higher than your current role
+              own_role: cannot be changed with your current role