feat(v2.7.0): add n8n_update_partial_workflow with transactional updates
BREAKING CHANGES: - Renamed n8n_update_workflow to n8n_update_full_workflow for clarity NEW FEATURES: - Added n8n_update_partial_workflow tool for diff-based workflow editing - Implemented WorkflowDiffEngine with 13 operation types - Added transactional updates with two-pass processing - Maximum 5 operations per request for reliability - Operations can be in any order - engine handles dependencies - Added validateOnly mode for testing changes before applying - 80-90% token savings by only sending changes IMPROVEMENTS: - Enhanced tool description with comprehensive parameter documentation - Added clear examples for simple and complex use cases - Improved error messages and validation - Added extensive test coverage for all operations DOCUMENTATION: - Added workflow-diff-examples.md with usage patterns - Added transactional-updates-example.md showing before/after - Updated README.md with v2.7.0 features - Updated CLAUDE.md with latest changes 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
czlonkowski
@@ -105,6 +105,13 @@ export function cleanWorkflowForUpdate(workflow: Workflow): Partial<Workflow> {
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// Remove fields that cause API errors
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pinData,
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tags,
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// Remove additional fields that n8n API doesn't accept
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isArchived,
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usedCredentials,
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sharedWithProjects,
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triggerCount,
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shared,
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active,
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// Keep everything else
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...cleanedWorkflow
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} = workflow as any;
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627
src/services/workflow-diff-engine.ts
Normal file
627
src/services/workflow-diff-engine.ts
Normal file
@@ -0,0 +1,627 @@
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/**
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* Workflow Diff Engine
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* Applies diff operations to n8n workflows
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*/
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import { v4 as uuidv4 } from 'uuid';
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import {
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WorkflowDiffOperation,
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WorkflowDiffRequest,
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WorkflowDiffResult,
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WorkflowDiffValidationError,
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isNodeOperation,
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isConnectionOperation,
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isMetadataOperation,
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AddNodeOperation,
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RemoveNodeOperation,
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UpdateNodeOperation,
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MoveNodeOperation,
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EnableNodeOperation,
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DisableNodeOperation,
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AddConnectionOperation,
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RemoveConnectionOperation,
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UpdateConnectionOperation,
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UpdateSettingsOperation,
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UpdateNameOperation,
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AddTagOperation,
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RemoveTagOperation
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} from '../types/workflow-diff';
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import { Workflow, WorkflowNode, WorkflowConnection } from '../types/n8n-api';
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import { Logger } from '../utils/logger';
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import { validateWorkflowNode, validateWorkflowConnections } from './n8n-validation';
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const logger = new Logger({ prefix: '[WorkflowDiffEngine]' });
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export class WorkflowDiffEngine {
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/**
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* Apply diff operations to a workflow
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*/
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async applyDiff(
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workflow: Workflow,
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request: WorkflowDiffRequest
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): Promise<WorkflowDiffResult> {
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try {
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// Limit operations to keep complexity manageable
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if (request.operations.length > 5) {
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return {
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success: false,
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errors: [{
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operation: -1,
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message: 'Too many operations. Maximum 5 operations allowed per request to ensure transactional integrity.'
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}]
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};
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}
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// Clone workflow to avoid modifying original
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const workflowCopy = JSON.parse(JSON.stringify(workflow));
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// Group operations by type for two-pass processing
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const nodeOperationTypes = ['addNode', 'removeNode', 'updateNode', 'moveNode', 'enableNode', 'disableNode'];
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const nodeOperations: Array<{ operation: WorkflowDiffOperation; index: number }> = [];
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const otherOperations: Array<{ operation: WorkflowDiffOperation; index: number }> = [];
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request.operations.forEach((operation, index) => {
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if (nodeOperationTypes.includes(operation.type)) {
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nodeOperations.push({ operation, index });
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} else {
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otherOperations.push({ operation, index });
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}
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});
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// Pass 1: Validate and apply node operations first
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for (const { operation, index } of nodeOperations) {
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const error = this.validateOperation(workflowCopy, operation);
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if (error) {
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return {
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success: false,
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errors: [{
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operation: index,
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message: error,
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details: operation
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}]
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};
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}
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// Always apply to working copy for proper validation of subsequent operations
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try {
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this.applyOperation(workflowCopy, operation);
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} catch (error) {
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return {
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success: false,
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errors: [{
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operation: index,
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message: `Failed to apply operation: ${error instanceof Error ? error.message : 'Unknown error'}`,
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details: operation
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}]
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};
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}
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}
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// Pass 2: Validate and apply other operations (connections, metadata)
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for (const { operation, index } of otherOperations) {
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const error = this.validateOperation(workflowCopy, operation);
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if (error) {
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return {
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success: false,
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errors: [{
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operation: index,
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message: error,
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details: operation
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}]
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};
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}
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// Always apply to working copy for proper validation of subsequent operations
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try {
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this.applyOperation(workflowCopy, operation);
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} catch (error) {
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return {
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success: false,
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errors: [{
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operation: index,
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message: `Failed to apply operation: ${error instanceof Error ? error.message : 'Unknown error'}`,
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details: operation
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}]
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};
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}
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}
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// If validateOnly flag is set, return success without applying
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if (request.validateOnly) {
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return {
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success: true,
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message: 'Validation successful. Operations are valid but not applied.'
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};
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}
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const operationsApplied = request.operations.length;
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return {
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success: true,
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workflow: workflowCopy,
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operationsApplied,
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message: `Successfully applied ${operationsApplied} operations (${nodeOperations.length} node ops, ${otherOperations.length} other ops)`
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};
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} catch (error) {
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logger.error('Failed to apply diff', error);
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return {
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success: false,
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errors: [{
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operation: -1,
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message: `Diff engine error: ${error instanceof Error ? error.message : 'Unknown error'}`
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}]
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};
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}
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}
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/**
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* Validate a single operation
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*/
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private validateOperation(workflow: Workflow, operation: WorkflowDiffOperation): string | null {
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switch (operation.type) {
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case 'addNode':
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return this.validateAddNode(workflow, operation);
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case 'removeNode':
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return this.validateRemoveNode(workflow, operation);
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case 'updateNode':
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return this.validateUpdateNode(workflow, operation);
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case 'moveNode':
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return this.validateMoveNode(workflow, operation);
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case 'enableNode':
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case 'disableNode':
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return this.validateToggleNode(workflow, operation);
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case 'addConnection':
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return this.validateAddConnection(workflow, operation);
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case 'removeConnection':
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return this.validateRemoveConnection(workflow, operation);
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case 'updateConnection':
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return this.validateUpdateConnection(workflow, operation);
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case 'updateSettings':
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case 'updateName':
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case 'addTag':
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case 'removeTag':
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return null; // These are always valid
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default:
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return `Unknown operation type: ${(operation as any).type}`;
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}
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}
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/**
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* Apply a single operation to the workflow
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*/
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private applyOperation(workflow: Workflow, operation: WorkflowDiffOperation): void {
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switch (operation.type) {
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case 'addNode':
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this.applyAddNode(workflow, operation);
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break;
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case 'removeNode':
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this.applyRemoveNode(workflow, operation);
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break;
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case 'updateNode':
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this.applyUpdateNode(workflow, operation);
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break;
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case 'moveNode':
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this.applyMoveNode(workflow, operation);
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break;
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case 'enableNode':
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this.applyEnableNode(workflow, operation);
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break;
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case 'disableNode':
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this.applyDisableNode(workflow, operation);
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break;
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case 'addConnection':
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this.applyAddConnection(workflow, operation);
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break;
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case 'removeConnection':
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this.applyRemoveConnection(workflow, operation);
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break;
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case 'updateConnection':
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this.applyUpdateConnection(workflow, operation);
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break;
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case 'updateSettings':
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this.applyUpdateSettings(workflow, operation);
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break;
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case 'updateName':
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this.applyUpdateName(workflow, operation);
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break;
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case 'addTag':
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this.applyAddTag(workflow, operation);
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break;
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case 'removeTag':
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this.applyRemoveTag(workflow, operation);
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break;
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}
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}
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// Node operation validators
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private validateAddNode(workflow: Workflow, operation: AddNodeOperation): string | null {
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const { node } = operation;
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// Check if node with same name already exists
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if (workflow.nodes.some(n => n.name === node.name)) {
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return `Node with name "${node.name}" already exists`;
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}
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// Validate node type format
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if (!node.type.includes('.')) {
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return `Invalid node type "${node.type}". Must include package prefix (e.g., "n8n-nodes-base.webhook")`;
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}
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if (node.type.startsWith('nodes-base.')) {
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return `Invalid node type "${node.type}". Use "n8n-nodes-base.${node.type.substring(11)}" instead`;
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}
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return null;
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}
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private validateRemoveNode(workflow: Workflow, operation: RemoveNodeOperation): string | null {
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const node = this.findNode(workflow, operation.nodeId, operation.nodeName);
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if (!node) {
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return `Node not found: ${operation.nodeId || operation.nodeName}`;
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}
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// Check if node has connections that would be broken
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const hasConnections = Object.values(workflow.connections).some(conn => {
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return Object.values(conn).some(outputs =>
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outputs.some(connections =>
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connections.some(c => c.node === node.name)
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)
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);
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});
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if (hasConnections || workflow.connections[node.name]) {
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// This is a warning, not an error - connections will be cleaned up
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logger.warn(`Removing node "${node.name}" will break existing connections`);
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}
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return null;
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}
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private validateUpdateNode(workflow: Workflow, operation: UpdateNodeOperation): string | null {
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const node = this.findNode(workflow, operation.nodeId, operation.nodeName);
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if (!node) {
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return `Node not found: ${operation.nodeId || operation.nodeName}`;
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}
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return null;
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}
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private validateMoveNode(workflow: Workflow, operation: MoveNodeOperation): string | null {
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const node = this.findNode(workflow, operation.nodeId, operation.nodeName);
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if (!node) {
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return `Node not found: ${operation.nodeId || operation.nodeName}`;
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}
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return null;
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}
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private validateToggleNode(workflow: Workflow, operation: EnableNodeOperation | DisableNodeOperation): string | null {
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const node = this.findNode(workflow, operation.nodeId, operation.nodeName);
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if (!node) {
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return `Node not found: ${operation.nodeId || operation.nodeName}`;
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}
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return null;
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}
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// Connection operation validators
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private validateAddConnection(workflow: Workflow, operation: AddConnectionOperation): string | null {
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const sourceNode = this.findNode(workflow, operation.source, operation.source);
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const targetNode = this.findNode(workflow, operation.target, operation.target);
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if (!sourceNode) {
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return `Source node not found: ${operation.source}`;
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}
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if (!targetNode) {
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return `Target node not found: ${operation.target}`;
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}
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// Check if connection already exists
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const sourceOutput = operation.sourceOutput || 'main';
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const existing = workflow.connections[sourceNode.name]?.[sourceOutput];
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if (existing) {
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const hasConnection = existing.some(connections =>
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connections.some(c => c.node === targetNode.name)
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);
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if (hasConnection) {
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return `Connection already exists from "${sourceNode.name}" to "${targetNode.name}"`;
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}
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}
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return null;
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}
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private validateRemoveConnection(workflow: Workflow, operation: RemoveConnectionOperation): string | null {
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const sourceNode = this.findNode(workflow, operation.source, operation.source);
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const targetNode = this.findNode(workflow, operation.target, operation.target);
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if (!sourceNode) {
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return `Source node not found: ${operation.source}`;
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}
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if (!targetNode) {
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return `Target node not found: ${operation.target}`;
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}
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const sourceOutput = operation.sourceOutput || 'main';
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const connections = workflow.connections[sourceNode.name]?.[sourceOutput];
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if (!connections) {
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return `No connections found from "${sourceNode.name}"`;
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}
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const hasConnection = connections.some(conns =>
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conns.some(c => c.node === targetNode.name)
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);
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if (!hasConnection) {
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return `No connection exists from "${sourceNode.name}" to "${targetNode.name}"`;
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}
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return null;
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}
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private validateUpdateConnection(workflow: Workflow, operation: UpdateConnectionOperation): string | null {
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const sourceNode = this.findNode(workflow, operation.source, operation.source);
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const targetNode = this.findNode(workflow, operation.target, operation.target);
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if (!sourceNode) {
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return `Source node not found: ${operation.source}`;
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}
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if (!targetNode) {
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return `Target node not found: ${operation.target}`;
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}
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// Check if connection exists to update
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const existingConnections = workflow.connections[sourceNode.name];
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if (!existingConnections) {
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return `No connections found from "${sourceNode.name}"`;
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}
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// Check if any connection to target exists
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let hasConnection = false;
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Object.values(existingConnections).forEach(outputs => {
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outputs.forEach(connections => {
|
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if (connections.some(c => c.node === targetNode.name)) {
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hasConnection = true;
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}
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});
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});
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|
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if (!hasConnection) {
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return `No connection exists from "${sourceNode.name}" to "${targetNode.name}"`;
|
||||
}
|
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|
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return null;
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}
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|
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// Node operation appliers
|
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private applyAddNode(workflow: Workflow, operation: AddNodeOperation): void {
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const newNode: WorkflowNode = {
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id: operation.node.id || uuidv4(),
|
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name: operation.node.name,
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type: operation.node.type,
|
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typeVersion: operation.node.typeVersion || 1,
|
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position: operation.node.position,
|
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parameters: operation.node.parameters || {},
|
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credentials: operation.node.credentials,
|
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disabled: operation.node.disabled,
|
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notes: operation.node.notes,
|
||||
notesInFlow: operation.node.notesInFlow,
|
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continueOnFail: operation.node.continueOnFail,
|
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retryOnFail: operation.node.retryOnFail,
|
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maxTries: operation.node.maxTries,
|
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waitBetweenTries: operation.node.waitBetweenTries,
|
||||
alwaysOutputData: operation.node.alwaysOutputData,
|
||||
executeOnce: operation.node.executeOnce
|
||||
};
|
||||
|
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workflow.nodes.push(newNode);
|
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}
|
||||
|
||||
private applyRemoveNode(workflow: Workflow, operation: RemoveNodeOperation): void {
|
||||
const node = this.findNode(workflow, operation.nodeId, operation.nodeName);
|
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if (!node) return;
|
||||
|
||||
// Remove node from array
|
||||
const index = workflow.nodes.findIndex(n => n.id === node.id);
|
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if (index !== -1) {
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workflow.nodes.splice(index, 1);
|
||||
}
|
||||
|
||||
// Remove all connections from this node
|
||||
delete workflow.connections[node.name];
|
||||
|
||||
// Remove all connections to this node
|
||||
Object.keys(workflow.connections).forEach(sourceName => {
|
||||
const sourceConnections = workflow.connections[sourceName];
|
||||
Object.keys(sourceConnections).forEach(outputName => {
|
||||
sourceConnections[outputName] = sourceConnections[outputName].map(connections =>
|
||||
connections.filter(conn => conn.node !== node.name)
|
||||
).filter(connections => connections.length > 0);
|
||||
|
||||
// Clean up empty arrays
|
||||
if (sourceConnections[outputName].length === 0) {
|
||||
delete sourceConnections[outputName];
|
||||
}
|
||||
});
|
||||
|
||||
// Clean up empty connection objects
|
||||
if (Object.keys(sourceConnections).length === 0) {
|
||||
delete workflow.connections[sourceName];
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
private applyUpdateNode(workflow: Workflow, operation: UpdateNodeOperation): void {
|
||||
const node = this.findNode(workflow, operation.nodeId, operation.nodeName);
|
||||
if (!node) return;
|
||||
|
||||
// Apply changes using dot notation
|
||||
Object.entries(operation.changes).forEach(([path, value]) => {
|
||||
this.setNestedProperty(node, path, value);
|
||||
});
|
||||
}
|
||||
|
||||
private applyMoveNode(workflow: Workflow, operation: MoveNodeOperation): void {
|
||||
const node = this.findNode(workflow, operation.nodeId, operation.nodeName);
|
||||
if (!node) return;
|
||||
|
||||
node.position = operation.position;
|
||||
}
|
||||
|
||||
private applyEnableNode(workflow: Workflow, operation: EnableNodeOperation): void {
|
||||
const node = this.findNode(workflow, operation.nodeId, operation.nodeName);
|
||||
if (!node) return;
|
||||
|
||||
node.disabled = false;
|
||||
}
|
||||
|
||||
private applyDisableNode(workflow: Workflow, operation: DisableNodeOperation): void {
|
||||
const node = this.findNode(workflow, operation.nodeId, operation.nodeName);
|
||||
if (!node) return;
|
||||
|
||||
node.disabled = true;
|
||||
}
|
||||
|
||||
// Connection operation appliers
|
||||
private applyAddConnection(workflow: Workflow, operation: AddConnectionOperation): void {
|
||||
const sourceNode = this.findNode(workflow, operation.source, operation.source);
|
||||
const targetNode = this.findNode(workflow, operation.target, operation.target);
|
||||
if (!sourceNode || !targetNode) return;
|
||||
|
||||
const sourceOutput = operation.sourceOutput || 'main';
|
||||
const targetInput = operation.targetInput || 'main';
|
||||
const sourceIndex = operation.sourceIndex || 0;
|
||||
const targetIndex = operation.targetIndex || 0;
|
||||
|
||||
// Initialize connections structure if needed
|
||||
if (!workflow.connections[sourceNode.name]) {
|
||||
workflow.connections[sourceNode.name] = {};
|
||||
}
|
||||
if (!workflow.connections[sourceNode.name][sourceOutput]) {
|
||||
workflow.connections[sourceNode.name][sourceOutput] = [];
|
||||
}
|
||||
|
||||
// Ensure we have array at the source index
|
||||
while (workflow.connections[sourceNode.name][sourceOutput].length <= sourceIndex) {
|
||||
workflow.connections[sourceNode.name][sourceOutput].push([]);
|
||||
}
|
||||
|
||||
// Add connection
|
||||
workflow.connections[sourceNode.name][sourceOutput][sourceIndex].push({
|
||||
node: targetNode.name,
|
||||
type: targetInput,
|
||||
index: targetIndex
|
||||
});
|
||||
}
|
||||
|
||||
private applyRemoveConnection(workflow: Workflow, operation: RemoveConnectionOperation): void {
|
||||
const sourceNode = this.findNode(workflow, operation.source, operation.source);
|
||||
const targetNode = this.findNode(workflow, operation.target, operation.target);
|
||||
if (!sourceNode || !targetNode) return;
|
||||
|
||||
const sourceOutput = operation.sourceOutput || 'main';
|
||||
const connections = workflow.connections[sourceNode.name]?.[sourceOutput];
|
||||
if (!connections) return;
|
||||
|
||||
// Remove connection from all indices
|
||||
workflow.connections[sourceNode.name][sourceOutput] = connections.map(conns =>
|
||||
conns.filter(conn => conn.node !== targetNode.name)
|
||||
);
|
||||
|
||||
// Clean up empty arrays
|
||||
workflow.connections[sourceNode.name][sourceOutput] =
|
||||
workflow.connections[sourceNode.name][sourceOutput].filter(conns => conns.length > 0);
|
||||
|
||||
if (workflow.connections[sourceNode.name][sourceOutput].length === 0) {
|
||||
delete workflow.connections[sourceNode.name][sourceOutput];
|
||||
}
|
||||
|
||||
if (Object.keys(workflow.connections[sourceNode.name]).length === 0) {
|
||||
delete workflow.connections[sourceNode.name];
|
||||
}
|
||||
}
|
||||
|
||||
private applyUpdateConnection(workflow: Workflow, operation: UpdateConnectionOperation): void {
|
||||
// For now, implement as remove + add
|
||||
this.applyRemoveConnection(workflow, {
|
||||
type: 'removeConnection',
|
||||
source: operation.source,
|
||||
target: operation.target,
|
||||
sourceOutput: operation.changes.sourceOutput,
|
||||
targetInput: operation.changes.targetInput
|
||||
});
|
||||
|
||||
this.applyAddConnection(workflow, {
|
||||
type: 'addConnection',
|
||||
source: operation.source,
|
||||
target: operation.target,
|
||||
sourceOutput: operation.changes.sourceOutput,
|
||||
targetInput: operation.changes.targetInput,
|
||||
sourceIndex: operation.changes.sourceIndex,
|
||||
targetIndex: operation.changes.targetIndex
|
||||
});
|
||||
}
|
||||
|
||||
// Metadata operation appliers
|
||||
private applyUpdateSettings(workflow: Workflow, operation: UpdateSettingsOperation): void {
|
||||
if (!workflow.settings) {
|
||||
workflow.settings = {};
|
||||
}
|
||||
Object.assign(workflow.settings, operation.settings);
|
||||
}
|
||||
|
||||
private applyUpdateName(workflow: Workflow, operation: UpdateNameOperation): void {
|
||||
workflow.name = operation.name;
|
||||
}
|
||||
|
||||
private applyAddTag(workflow: Workflow, operation: AddTagOperation): void {
|
||||
if (!workflow.tags) {
|
||||
workflow.tags = [];
|
||||
}
|
||||
if (!workflow.tags.includes(operation.tag)) {
|
||||
workflow.tags.push(operation.tag);
|
||||
}
|
||||
}
|
||||
|
||||
private applyRemoveTag(workflow: Workflow, operation: RemoveTagOperation): void {
|
||||
if (!workflow.tags) return;
|
||||
|
||||
const index = workflow.tags.indexOf(operation.tag);
|
||||
if (index !== -1) {
|
||||
workflow.tags.splice(index, 1);
|
||||
}
|
||||
}
|
||||
|
||||
// Helper methods
|
||||
private findNode(workflow: Workflow, nodeId?: string, nodeName?: string): WorkflowNode | null {
|
||||
if (nodeId) {
|
||||
const nodeById = workflow.nodes.find(n => n.id === nodeId);
|
||||
if (nodeById) return nodeById;
|
||||
}
|
||||
|
||||
if (nodeName) {
|
||||
const nodeByName = workflow.nodes.find(n => n.name === nodeName);
|
||||
if (nodeByName) return nodeByName;
|
||||
}
|
||||
|
||||
// If nodeId is provided but not found, try treating it as a name
|
||||
if (nodeId && !nodeName) {
|
||||
const nodeByName = workflow.nodes.find(n => n.name === nodeId);
|
||||
if (nodeByName) return nodeByName;
|
||||
}
|
||||
|
||||
return null;
|
||||
}
|
||||
|
||||
private setNestedProperty(obj: any, path: string, value: any): void {
|
||||
const keys = path.split('.');
|
||||
let current = obj;
|
||||
|
||||
for (let i = 0; i < keys.length - 1; i++) {
|
||||
const key = keys[i];
|
||||
if (!(key in current) || typeof current[key] !== 'object') {
|
||||
current[key] = {};
|
||||
}
|
||||
current = current[key];
|
||||
}
|
||||
|
||||
current[keys[keys.length - 1]] = value;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user