Initial commit to release

packages/cli/src/WorkflowHelpers.ts

@@ -0,0 +1,152 @@
+import {
+	Db,
+	IWorkflowErrorData,
+	NodeTypes,
+	WorkflowExecuteAdditionalData,
+} from './';
+
+import {
+	WorkflowExecute,
+} from 'n8n-core';
+
+import {
+	IExecuteData,
+	INode,
+	IRunExecutionData,
+	Workflow,
+} from 'n8n-workflow';
+
+import * as config from 'config';
+
+const ERROR_TRIGGER_TYPE = config.get('nodes.errorTriggerType') as string;
+
+/**
+ * Returns if the given id is a valid workflow id
+ *
+ * @param {(string | null | undefined)} id The id to check
+ * @returns {boolean}
+ * @memberof App
+ */
+export function isWorkflowIdValid (id: string | null | undefined | number): boolean {
+	if (typeof id === 'string') {
+		id = parseInt(id, 10);
+	}
+
+	if (isNaN(id as number)) {
+		return false;
+
+	}
+	return true;
+}
+
+
+
+/**
+ * Executes the error workflow
+ *
+ * @export
+ * @param {string} workflowId The id of the error workflow
+ * @param {IWorkflowErrorData} workflowErrorData The error data
+ * @returns {Promise<void>}
+ */
+export async function executeErrorWorkflow(workflowId: string, workflowErrorData: IWorkflowErrorData): Promise<void> {
+	// Wrap everything in try/catch to make sure that no errors bubble up and all get caught here
+	try {
+		const workflowData = await Db.collections.Workflow!.findOne({ id: workflowId });
+
+		if (workflowData === undefined) {
+			// The error workflow could not be found
+			console.error(`ERROR: Calling Error Workflow for "${workflowErrorData.workflow.id}". Could not find error workflow "${workflowId}"`);
+			return;
+		}
+
+		const executionMode = 'error';
+		const nodeTypes = NodeTypes();
+
+		const workflowInstance = new Workflow(workflowId, workflowData.nodes, workflowData.connections, workflowData.active, nodeTypes, undefined, workflowData.settings);
+
+
+		let node: INode;
+		let workflowStartNode: INode | undefined;
+		for (const nodeName of Object.keys(workflowInstance.nodes)) {
+			node = workflowInstance.nodes[nodeName];
+			if (node.type === ERROR_TRIGGER_TYPE) {
+				workflowStartNode = node;
+			}
+		}
+
+		if (workflowStartNode === undefined) {
+			console.error(`ERROR: Calling Error Workflow for "${workflowErrorData.workflow.id}". Could not find "${ERROR_TRIGGER_TYPE}" in workflow "${workflowId}"`);
+			return;
+		}
+
+		const additionalData = await WorkflowExecuteAdditionalData.get(executionMode, workflowData, workflowInstance);
+
+		// Can execute without webhook so go on
+		const workflowExecute = new WorkflowExecute(additionalData, executionMode);
+
+		// Initialize the data of the webhook node
+		const nodeExecutionStack: IExecuteData[] = [];
+		nodeExecutionStack.push(
+			{
+				node: workflowStartNode,
+				data: {
+					main: [
+						[
+							{
+								json: workflowErrorData
+							}
+						]
+					],
+				},
+			},
+		);
+
+		const runExecutionData: IRunExecutionData = {
+			startData: {
+			},
+			resultData: {
+				runData: {},
+			},
+			executionData: {
+				contextData: {},
+				nodeExecutionStack,
+				waitingExecution: {},
+			},
+		};
+
+		// Start now to run the workflow
+		await workflowExecute.runExecutionData(workflowInstance, runExecutionData);
+
+	} catch (error) {
+		console.error(`ERROR: Calling Error Workflow for "${workflowErrorData.workflow.id}": ${error.message}`);
+	}
+}
+
+
+
+/**
+ * Saves the static data if it changed
+ *
+ * @export
+ * @param {Workflow} workflow
+ * @returns {Promise <void>}
+ */
+export async function saveStaticData(workflow: Workflow): Promise <void> {
+	if (workflow.staticData.__dataChanged === true) {
+		// Static data of workflow changed and so has to be saved
+		if (isWorkflowIdValid(workflow.id) === true) {
+			// Workflow is saved so update in database
+			try {
+				await Db.collections.Workflow!
+					.update(workflow.id!, {
+						staticData: workflow.staticData,
+					});
+				workflow.staticData.__dataChanged = false;
+			} catch (e) {
+				// TODO: Add proper logging!
+				console.error(`There was a problem saving the workflow with id "${workflow.id}" to save changed staticData: ${e.message}`);
+			}
+		}
+	}
+}