feat(Set Node): Overhaul (#6348)

Github issue / Community forum post (link here to close automatically):
https://github.com/n8n-io/n8n/pull/6348

---------

Co-authored-by: Giulio Andreini <g.andreini@gmail.com>
Co-authored-by: Marcus <marcus@n8n.io>

packages/nodes-base/nodes/Set/v2/manual.mode.ts

@@ -0,0 +1,208 @@
+import type {
+	IDataObject,
+	IExecuteFunctions,
+	INode,
+	INodeExecutionData,
+	INodeProperties,
+} from 'n8n-workflow';
+import { NodeOperationError } from 'n8n-workflow';
+
+import {
+	parseJsonParameter,
+	validateEntry,
+	composeReturnItem,
+	resolveRawData,
+} from './helpers/utils';
+import type { SetField, SetNodeOptions } from './helpers/interfaces';
+import { updateDisplayOptions } from '../../../utils/utilities';
+
+const properties: INodeProperties[] = [
+	{
+		displayName: 'Fields to Set',
+		name: 'fields',
+		placeholder: 'Add Field',
+		type: 'fixedCollection',
+		description: 'Edit existing fields or add new ones to modify the output data',
+		typeOptions: {
+			multipleValues: true,
+			sortable: true,
+		},
+		default: {},
+		options: [
+			{
+				name: 'values',
+				displayName: 'Values',
+				values: [
+					{
+						displayName: 'Name',
+						name: 'name',
+						type: 'string',
+						default: '',
+						placeholder: 'e.g. fieldName',
+						description:
+							'Name of the field to set the value of. Supports dot-notation. Example: data.person[0].name.',
+						requiresDataPath: 'single',
+					},
+					{
+						displayName: 'Type',
+						name: 'type',
+						type: 'options',
+						description: 'The field value type',
+						// eslint-disable-next-line n8n-nodes-base/node-param-options-type-unsorted-items
+						options: [
+							{
+								name: 'String',
+								value: 'stringValue',
+							},
+							{
+								name: 'Number',
+								value: 'numberValue',
+							},
+							{
+								name: 'Boolean',
+								value: 'booleanValue',
+							},
+							{
+								name: 'Array',
+								value: 'arrayValue',
+							},
+							{
+								name: 'Object',
+								value: 'objectValue',
+							},
+						],
+						default: 'stringValue',
+					},
+					{
+						displayName: 'Value',
+						name: 'stringValue',
+						type: 'string',
+						default: '',
+						displayOptions: {
+							show: {
+								type: ['stringValue'],
+							},
+						},
+						validateType: 'string',
+						ignoreValidationDuringExecution: true,
+					},
+					{
+						displayName: 'Value',
+						name: 'numberValue',
+						type: 'string',
+						default: '',
+						displayOptions: {
+							show: {
+								type: ['numberValue'],
+							},
+						},
+						validateType: 'number',
+						ignoreValidationDuringExecution: true,
+					},
+					{
+						displayName: 'Value',
+						name: 'booleanValue',
+						type: 'options',
+						default: 'true',
+						options: [
+							{
+								name: 'True',
+								value: 'true',
+							},
+							{
+								name: 'False',
+								value: 'false',
+							},
+						],
+						displayOptions: {
+							show: {
+								type: ['booleanValue'],
+							},
+						},
+						validateType: 'boolean',
+						ignoreValidationDuringExecution: true,
+					},
+					{
+						displayName: 'Value',
+						name: 'arrayValue',
+						type: 'string',
+						default: '',
+						placeholder: 'e.g. [ arrayItem1, arrayItem2, arrayItem3 ]',
+						displayOptions: {
+							show: {
+								type: ['arrayValue'],
+							},
+						},
+						validateType: 'array',
+						ignoreValidationDuringExecution: true,
+					},
+					{
+						displayName: 'Value',
+						name: 'objectValue',
+						type: 'string',
+						default: '={}',
+						typeOptions: {
+							editor: 'json',
+							editorLanguage: 'json',
+							rows: 2,
+						},
+						displayOptions: {
+							show: {
+								type: ['objectValue'],
+							},
+						},
+						validateType: 'object',
+						ignoreValidationDuringExecution: true,
+					},
+				],
+			},
+		],
+	},
+];
+
+const displayOptions = {
+	show: {
+		mode: ['manual'],
+	},
+};
+
+export const description = updateDisplayOptions(displayOptions, properties);
+
+export async function execute(
+	this: IExecuteFunctions,
+	item: INodeExecutionData,
+	i: number,
+	options: SetNodeOptions,
+	rawFieldsData: IDataObject,
+	node: INode,
+) {
+	try {
+		const fields = this.getNodeParameter('fields.values', i, []) as SetField[];
+
+		const newData: IDataObject = {};
+
+		for (const entry of fields) {
+			if (entry.type === 'objectValue' && rawFieldsData[entry.name] !== undefined) {
+				entry.objectValue = parseJsonParameter(
+					resolveRawData.call(this, rawFieldsData[entry.name] as string, i),
+					node,
+					i,
+					entry.name,
+				);
+			}
+
+			const { name, value } = validateEntry(entry, node, i, options.ignoreConversionErrors);
+			newData[name] = value;
+		}
+
+		return composeReturnItem.call(this, i, item, newData, options);
+	} catch (error) {
+		if (this.continueOnFail()) {
+			return { json: { error: (error as Error).message } };
+		}
+		throw new NodeOperationError(this.getNode(), error as Error, {
+			itemIndex: i,
+			description: error.description,
+		});
+	}
+}