Add empty workflow action (#14399)

As title

packages/twenty-server/src/modules/workflow/workflow-executor/factories/workflow-action.factory.ts

@@ -8,6 +8,7 @@ import {
 } from 'src/modules/workflow/workflow-executor/exceptions/workflow-step-executor.exception';
 import { AiAgentWorkflowAction } from 'src/modules/workflow/workflow-executor/workflow-actions/ai-agent/ai-agent.workflow-action';
 import { CodeWorkflowAction } from 'src/modules/workflow/workflow-executor/workflow-actions/code/code.workflow-action';
+import { EmptyWorkflowAction } from 'src/modules/workflow/workflow-executor/workflow-actions/empty/empty.workflow-action';
 import { FilterWorkflowAction } from 'src/modules/workflow/workflow-executor/workflow-actions/filter/filter.workflow-action';
 import { FormWorkflowAction } from 'src/modules/workflow/workflow-executor/workflow-actions/form/form.workflow-action';
 import { IteratorWorkflowAction } from 'src/modules/workflow/workflow-executor/workflow-actions/iterator/iterator.workflow-action';
@@ -31,6 +32,7 @@ export class WorkflowActionFactory {
     private readonly iteratorWorkflowAction: IteratorWorkflowAction,
     private readonly toolExecutorWorkflowAction: ToolExecutorWorkflowAction,
     private readonly aiAgentWorkflowAction: AiAgentWorkflowAction,
+    private readonly emptyWorkflowAction: EmptyWorkflowAction,
   ) {}
 
   get(stepType: WorkflowActionType): WorkflowAction {
@@ -57,6 +59,8 @@ export class WorkflowActionFactory {
         return this.toolExecutorWorkflowAction;
       case WorkflowActionType.AI_AGENT:
         return this.aiAgentWorkflowAction;
+      case WorkflowActionType.EMPTY:
+        return this.emptyWorkflowAction;
       default:
         throw new WorkflowStepExecutorException(
           `Workflow step executor not found for step type '${stepType}'`,

packages/twenty-server/src/modules/workflow/workflow-executor/workflow-actions/empty/empty-action.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+
+import { EmptyWorkflowAction } from 'src/modules/workflow/workflow-executor/workflow-actions/empty/empty.workflow-action';
+
+@Module({
+  providers: [EmptyWorkflowAction],
+  exports: [EmptyWorkflowAction],
+})
+export class EmptyActionModule {}

packages/twenty-server/src/modules/workflow/workflow-executor/workflow-actions/empty/empty.workflow-action.ts

@@ -0,0 +1,34 @@
+import { Injectable } from '@nestjs/common';
+
+import { type WorkflowAction } from 'src/modules/workflow/workflow-executor/interfaces/workflow-action.interface';
+
+import {
+  WorkflowStepExecutorException,
+  WorkflowStepExecutorExceptionCode,
+} from 'src/modules/workflow/workflow-executor/exceptions/workflow-step-executor.exception';
+import { type WorkflowActionInput } from 'src/modules/workflow/workflow-executor/types/workflow-action-input';
+import { type WorkflowActionOutput } from 'src/modules/workflow/workflow-executor/types/workflow-action-output.type';
+import { findStepOrThrow } from 'src/modules/workflow/workflow-executor/utils/find-step-or-throw.util';
+import { isWorkflowEmptyAction } from 'src/modules/workflow/workflow-executor/workflow-actions/empty/guards/is-workflow-empty-action.guard';
+
+@Injectable()
+export class EmptyWorkflowAction implements WorkflowAction {
+  async execute({
+    currentStepId,
+    steps,
+  }: WorkflowActionInput): Promise<WorkflowActionOutput> {
+    const step = findStepOrThrow({
+      stepId: currentStepId,
+      steps,
+    });
+
+    if (!isWorkflowEmptyAction(step)) {
+      throw new WorkflowStepExecutorException(
+        'Step is not an empty action',
+        WorkflowStepExecutorExceptionCode.INVALID_STEP_TYPE,
+      );
+    }
+
+    return { result: {} };
+  }
+}

packages/twenty-server/src/modules/workflow/workflow-executor/workflow-actions/empty/guards/is-workflow-empty-action.guard.ts

@@ -0,0 +1,10 @@
+import {
+  WorkflowActionType,
+  type WorkflowAction,
+} from 'src/modules/workflow/workflow-executor/workflow-actions/types/workflow-action.type';
+
+export const isWorkflowEmptyAction = (
+  action: WorkflowAction,
+): action is WorkflowAction & { type: WorkflowActionType.EMPTY } => {
+  return action.type === WorkflowActionType.EMPTY;
+};

packages/twenty-server/src/modules/workflow/workflow-executor/workflow-actions/types/workflow-action.type.ts

@@ -25,6 +25,7 @@ export enum WorkflowActionType {
   HTTP_REQUEST = 'HTTP_REQUEST',
   AI_AGENT = 'AI_AGENT',
   ITERATOR = 'ITERATOR',
+  EMPTY = 'EMPTY',
 }
 
 type BaseWorkflowAction = {
@@ -95,6 +96,10 @@ export type WorkflowIteratorAction = BaseWorkflowAction & {
   settings: WorkflowIteratorActionSettings;
 };
 
+export type WorkflowEmptyAction = BaseWorkflowAction & {
+  type: WorkflowActionType.EMPTY;
+};
+
 export type WorkflowAction =
   | WorkflowCodeAction
   | WorkflowSendEmailAction
@@ -106,4 +111,5 @@ export type WorkflowAction =
   | WorkflowFilterAction
   | WorkflowHttpRequestAction
   | WorkflowAiAgentAction
-  | WorkflowIteratorAction;
+  | WorkflowIteratorAction
+  | WorkflowEmptyAction;

packages/twenty-server/src/modules/workflow/workflow-executor/workflow-executor.module.ts

@@ -8,6 +8,7 @@ import { WorkflowCommonModule } from 'src/modules/workflow/common/workflow-commo
 import { WorkflowActionFactory } from 'src/modules/workflow/workflow-executor/factories/workflow-action.factory';
 import { AiAgentActionModule } from 'src/modules/workflow/workflow-executor/workflow-actions/ai-agent/ai-agent-action.module';
 import { CodeActionModule } from 'src/modules/workflow/workflow-executor/workflow-actions/code/code-action.module';
+import { EmptyActionModule } from 'src/modules/workflow/workflow-executor/workflow-actions/empty/empty-action.module';
 import { FilterActionModule } from 'src/modules/workflow/workflow-executor/workflow-actions/filter/filter-action.module';
 import { FormActionModule } from 'src/modules/workflow/workflow-executor/workflow-actions/form/form-action.module';
 import { IteratorActionModule } from 'src/modules/workflow/workflow-executor/workflow-actions/iterator/iterator-action.module';
@@ -27,6 +28,7 @@ import { WorkflowRunModule } from 'src/modules/workflow/workflow-runner/workflow
     FilterActionModule,
     IteratorActionModule,
     AiAgentActionModule,
+    EmptyActionModule,
     FeatureFlagModule,
     AiModule,
   ],