@leonardsellem/n8n-mcp-server
Version:
Model Context Protocol (MCP) server for n8n workflow automation
123 lines • 5.12 kB
JavaScript
/**
* Update Workflow Tool
*
* This tool updates an existing workflow in n8n.
*/
import { BaseWorkflowToolHandler } from './base-handler.js';
import { N8nApiError } from '../../errors/index.js';
/**
* Handler for the update_workflow tool
*/
export class UpdateWorkflowHandler extends BaseWorkflowToolHandler {
/**
* Execute the tool
*
* @param args Tool arguments containing workflow updates
* @returns Updated workflow information
*/
async execute(args) {
return this.handleExecution(async (args) => {
const { workflowId, name, nodes, connections, active, tags } = args;
if (!workflowId) {
throw new N8nApiError('Missing required parameter: workflowId');
}
// Validate nodes if provided
if (nodes && !Array.isArray(nodes)) {
throw new N8nApiError('Parameter "nodes" must be an array');
}
// Validate connections if provided
if (connections && typeof connections !== 'object') {
throw new N8nApiError('Parameter "connections" must be an object');
}
// Get the current workflow to update
const currentWorkflow = await this.apiService.getWorkflow(workflowId);
// Prepare update object with only allowed properties (per n8n API schema)
const workflowData = {
name: name !== undefined ? name : currentWorkflow.name,
nodes: nodes !== undefined ? nodes : currentWorkflow.nodes,
connections: connections !== undefined ? connections : currentWorkflow.connections,
settings: currentWorkflow.settings
};
// Add optional staticData if it exists
if (currentWorkflow.staticData !== undefined) {
workflowData.staticData = currentWorkflow.staticData;
}
// Note: active and tags are read-only properties and cannot be updated via this endpoint
// Update the workflow
const updatedWorkflow = await this.apiService.updateWorkflow(workflowId, workflowData);
// Build a summary of changes
const changesArray = [];
if (name !== undefined && name !== currentWorkflow.name)
changesArray.push(`name: "${currentWorkflow.name}" → "${name}"`);
if (nodes !== undefined)
changesArray.push('nodes updated');
if (connections !== undefined)
changesArray.push('connections updated');
// Add warnings for read-only properties
const warnings = [];
if (active !== undefined)
warnings.push('active (read-only, use activate/deactivate workflow tools)');
if (tags !== undefined)
warnings.push('tags (read-only property)');
const changesSummary = changesArray.length > 0
? `Changes: ${changesArray.join(', ')}`
: 'No changes were made';
const warningsSummary = warnings.length > 0
? ` Note: Ignored ${warnings.join(', ')}.`
: '';
return this.formatSuccess({
id: updatedWorkflow.id,
name: updatedWorkflow.name,
active: updatedWorkflow.active
}, `Workflow updated successfully. ${changesSummary}${warningsSummary}`);
}, args);
}
}
/**
* Get tool definition for the update_workflow tool
*
* @returns Tool definition
*/
export function getUpdateWorkflowToolDefinition() {
return {
name: 'update_workflow',
description: 'Update an existing workflow in n8n',
inputSchema: {
type: 'object',
properties: {
workflowId: {
type: 'string',
description: 'ID of the workflow to update',
},
name: {
type: 'string',
description: 'New name for the workflow',
},
nodes: {
type: 'array',
description: 'Updated array of node objects that define the workflow',
items: {
type: 'object',
},
},
connections: {
type: 'object',
description: 'Updated connection mappings between nodes',
},
active: {
type: 'boolean',
description: 'Whether the workflow should be active (read-only: use activate/deactivate workflow tools instead)',
},
tags: {
type: 'array',
description: 'Tags to associate with the workflow (read-only: cannot be updated via this endpoint)',
items: {
type: 'string',
},
},
},
required: ['workflowId'],
},
};
}
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