Status transitions editing

app/services/project_admin/workflows/statuses/update_transitions.rb

@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+module ProjectAdmin
+  module Workflows
+    module Statuses
+      class UpdateTransitions < ApplicationService
+        class TaskStatus
+          include ActiveModel::Model
+          include ActiveModel::Attributes
+
+          attribute :id, :integer
+          attribute :next_status_ids
+        end
+
+        attr_accessor :task_statuses
+
+        def self.from_model(workflow)
+          new(task_statuses_attributes: workflow.task_statuses
+            .includes(:next_statuses)
+            .map { |ts| { id: ts.id, next_status_ids: ts.next_status_ids } })
+        end
+
+        def task_statuses_attributes=(attributes)
+          @task_statuses = Array(attributes).map { |e| TaskStatus.new(e) }
+        end
+
+        def call(workflow)
+          workflow.update(task_statuses_attributes: task_statuses.map(&:attributes))
+        end
+      end
+    end
+  end
+end