n8n
Version:
n8n Workflow Automation Tool
185 lines • 9.6 kB
JavaScript
;
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Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
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var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.createUpdateWorkflowTool = void 0;
const db_1 = require("@n8n/db");
const zod_1 = __importDefault(require("zod"));
const mcp_constants_1 = require("../../mcp.constants");
const constants_1 = require("./constants");
const credentials_auto_assign_1 = require("./credentials-auto-assign");
const workflow_helpers_1 = require("../../../../workflow-helpers");
const workflow_validation_utils_1 = require("../workflow-validation.utils");
const inputSchema = {
workflowId: zod_1.default.string().describe('The ID of the workflow to update'),
code: zod_1.default
.string()
.describe(`Full TypeScript/JavaScript workflow code using the n8n Workflow SDK. Must be validated first with ${constants_1.CODE_BUILDER_VALIDATE_TOOL.toolName}.`),
name: zod_1.default
.string()
.max(128)
.optional()
.describe('Optional workflow name. If not provided, uses the name from the code.'),
description: zod_1.default
.string()
.max(255)
.optional()
.describe('Short workflow description summarizing what it does (1-2 sentences, max 255 chars).'),
};
const outputSchema = {
workflowId: zod_1.default.string().describe('The ID of the updated workflow'),
name: zod_1.default.string().describe('The name of the updated workflow'),
nodeCount: zod_1.default.number().describe('The number of nodes in the workflow'),
url: zod_1.default.string().describe('The URL to open the workflow in n8n'),
autoAssignedCredentials: zod_1.default
.array(zod_1.default.object({
nodeName: zod_1.default.string().describe('The name of the node that had credentials auto-assigned'),
credentialName: zod_1.default.string().describe('The name of the credential that was auto-assigned'),
credentialType: zod_1.default.string().describe('The credential type that was auto-assigned'),
}))
.describe('List of credentials that were automatically assigned to nodes'),
note: zod_1.default
.string()
.optional()
.describe('Additional notes about the workflow update, such as any nodes that were skipped during credential auto-assignment.'),
hint: zod_1.default
.string()
.optional()
.describe('Actionable hint for recovering from the error. When present, follow the suggested action before retrying.'),
};
const createUpdateWorkflowTool = (user, workflowFinderService, workflowService, urlService, telemetry, nodeTypes, credentialsService, sharedWorkflowRepository, collaborationService) => ({
name: constants_1.MCP_UPDATE_WORKFLOW_TOOL.toolName,
config: {
description: `Update an existing workflow in n8n from validated SDK code. Parses the code into a workflow and saves the changes. Always validate with ${constants_1.CODE_BUILDER_VALIDATE_TOOL.toolName} first.`,
inputSchema,
outputSchema,
annotations: {
title: constants_1.MCP_UPDATE_WORKFLOW_TOOL.displayTitle,
readOnlyHint: false,
destructiveHint: true,
idempotentHint: true,
openWorldHint: false,
},
},
handler: async ({ workflowId, code, name, description, }) => {
const telemetryPayload = {
user_id: user.id,
tool_name: constants_1.MCP_UPDATE_WORKFLOW_TOOL.toolName,
parameters: { workflowId, codeLength: code.length, hasName: !!name },
};
try {
const existingWorkflow = await (0, workflow_validation_utils_1.getMcpWorkflow)(workflowId, user, ['workflow:update'], workflowFinderService);
await collaborationService.ensureWorkflowEditable(existingWorkflow.id);
const { ParseValidateHandler, stripImportStatements } = await Promise.resolve().then(() => __importStar(require('@n8n/ai-workflow-builder')));
const handler = new ParseValidateHandler({ generatePinData: false });
const strippedCode = stripImportStatements(code);
const result = await handler.parseAndValidate(strippedCode);
const workflowJson = result.workflow;
const workflowUpdateData = new db_1.WorkflowEntity();
Object.assign(workflowUpdateData, {
name: name ?? workflowJson.name,
...(description !== undefined ? { description } : {}),
nodes: workflowJson.nodes,
connections: workflowJson.connections,
pinData: workflowJson.pinData,
meta: { ...workflowJson.meta, aiBuilderAssisted: true, builderVariant: 'mcp' },
});
(0, workflow_helpers_1.resolveNodeWebhookIds)(workflowUpdateData, nodeTypes);
(0, credentials_auto_assign_1.stripNullCredentialStubs)(workflowUpdateData.nodes);
const existingCredsByNode = new Map(existingWorkflow.nodes.map((n) => [n.name, { type: n.type, credentials: n.credentials }]));
for (const node of workflowUpdateData.nodes) {
if (!node.credentials) {
const existing = existingCredsByNode.get(node.name);
if (existing?.type === node.type && existing.credentials) {
node.credentials = { ...existing.credentials };
}
}
}
const sharedWorkflow = await sharedWorkflowRepository.findOneOrFail({
where: { workflowId, role: 'workflow:owner' },
select: ['projectId'],
});
const { assignments: credentialAssignments, skippedHttpNodes } = await (0, credentials_auto_assign_1.autoPopulateNodeCredentials)(workflowUpdateData, user, nodeTypes, credentialsService, sharedWorkflow.projectId);
const updatedWorkflow = await workflowService.update(user, workflowUpdateData, workflowId, {
aiBuilderAssisted: true,
source: 'n8n-mcp',
});
void collaborationService.broadcastWorkflowUpdate(workflowId, user.id).catch(() => { });
const baseUrl = urlService.getInstanceBaseUrl();
const workflowUrl = `${baseUrl}/workflow/${updatedWorkflow.id}`;
telemetryPayload.results = {
success: true,
data: {
workflowId: updatedWorkflow.id,
nodeCount: updatedWorkflow.nodes.length,
},
};
telemetry.track(mcp_constants_1.USER_CALLED_MCP_TOOL_EVENT, telemetryPayload);
const output = {
workflowId: updatedWorkflow.id,
name: updatedWorkflow.name,
nodeCount: updatedWorkflow.nodes.length,
url: workflowUrl,
autoAssignedCredentials: credentialAssignments,
note: skippedHttpNodes.length
? `HTTP Request nodes (${skippedHttpNodes.join(', ')}) were skipped during credential auto-assignment. Their credentials must be configured manually.`
: undefined,
};
return {
content: [{ type: 'text', text: JSON.stringify(output, null, 2) }],
structuredContent: output,
};
}
catch (error) {
const errorMessage = error instanceof Error ? error.message : String(error);
telemetryPayload.results = {
success: false,
error: errorMessage,
};
telemetry.track(mcp_constants_1.USER_CALLED_MCP_TOOL_EVENT, telemetryPayload);
const hint = (0, workflow_validation_utils_1.getSdkReferenceHint)(error);
const output = { error: errorMessage, ...(hint ? { hint } : {}) };
return {
content: [{ type: 'text', text: JSON.stringify(output, null, 2) }],
structuredContent: output,
isError: true,
};
}
},
});
exports.createUpdateWorkflowTool = createUpdateWorkflowTool;
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