feat(Merge Node): Overhaul, v3 (#9528)

Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>
Co-authored-by: Shireen Missi <94372015+ShireenMissi@users.noreply.github.com>

packages/nodes-base/nodes/Merge/v3/actions/mode/combineAll.ts

@@ -0,0 +1,84 @@
+import type {
+	IExecuteFunctions,
+	INodeExecutionData,
+	INodeProperties,
+	IPairedItemData,
+} from 'n8n-workflow';
+
+import { updateDisplayOptions } from '@utils/utilities';
+
+import type { ClashResolveOptions } from '../../helpers/interfaces';
+import { clashHandlingProperties, fuzzyCompareProperty } from '../../helpers/descriptions';
+import { addSuffixToEntriesKeys, selectMergeMethod } from '../../helpers/utils';
+
+import merge from 'lodash/merge';
+
+export const properties: INodeProperties[] = [
+	{
+		displayName: 'Options',
+		name: 'options',
+		type: 'collection',
+		placeholder: 'Add Option',
+		default: {},
+		options: [clashHandlingProperties, fuzzyCompareProperty],
+	},
+];
+
+const displayOptions = {
+	show: {
+		mode: ['combine'],
+		combineBy: ['combineAll'],
+	},
+};
+
+export const description = updateDisplayOptions(displayOptions, properties);
+
+export async function execute(
+	this: IExecuteFunctions,
+	inputsData: INodeExecutionData[][],
+): Promise<INodeExecutionData[]> {
+	const returnData: INodeExecutionData[] = [];
+
+	const clashHandling = this.getNodeParameter(
+		'options.clashHandling.values',
+		0,
+		{},
+	) as ClashResolveOptions;
+
+	let input1 = inputsData[0];
+	let input2 = inputsData[1];
+
+	if (clashHandling.resolveClash === 'preferInput1') {
+		[input1, input2] = [input2, input1];
+	}
+
+	if (clashHandling.resolveClash === 'addSuffix') {
+		input1 = addSuffixToEntriesKeys(input1, '1');
+		input2 = addSuffixToEntriesKeys(input2, '2');
+	}
+
+	const mergeIntoSingleObject = selectMergeMethod(clashHandling);
+
+	if (!input1 || !input2) {
+		return returnData;
+	}
+
+	let entry1: INodeExecutionData;
+	let entry2: INodeExecutionData;
+
+	for (entry1 of input1) {
+		for (entry2 of input2) {
+			returnData.push({
+				json: {
+					...mergeIntoSingleObject(entry1.json, entry2.json),
+				},
+				binary: {
+					...merge({}, entry1.binary, entry2.binary),
+				},
+				pairedItem: [entry1.pairedItem as IPairedItemData, entry2.pairedItem as IPairedItemData],
+			});
+		}
+	}
+
+	return returnData;
+}