✨ Add RabbitMQ and RabbitMQ Trigger Node (#1258)

* ✨ Add RabbitMQ-Node

* ✨ Add RabbitMQ-Trigger Node

* ⚡ Fix issue that connection errors did not get caught

* 🔨Fix name and description for RabbitMQ Trigger node

Co-authored-by: Harshil <ghagrawal17@gmail.com>

packages/nodes-base/nodes/RabbitMQ/RabbitMQ.node.ts

@@ -0,0 +1,147 @@
+import {
+	IExecuteFunctions,
+} from 'n8n-core';
+
+import {
+	IDataObject,
+	INodeExecutionData,
+	INodeType,
+	INodeTypeDescription,
+} from 'n8n-workflow';
+
+import {
+	rabbitDefaultOptions,
+} from './DefaultOptions';
+
+import {
+	rabbitmqConnect,
+} from './GenericFunctions';
+
+export class RabbitMQ implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'RabbitMQ',
+		name: 'rabbitmq',
+		icon: 'file:rabbitmq.png',
+		group: ['transform'],
+		version: 1,
+		description: 'Sends messages to a RabbitMQ topic',
+		defaults: {
+			name: 'RabbitMQ',
+			color: '#ff6600',
+		},
+		inputs: ['main'],
+		outputs: ['main'],
+		credentials: [
+			{
+				name: 'rabbitmq',
+				required: true,
+			},
+		],
+		properties: [
+			{
+				displayName: 'Queue / Topic',
+				name: 'queue',
+				type: 'string',
+				default: '',
+				placeholder: 'queue-name',
+				description: 'Name of the queue to publish to.',
+			},
+			{
+				displayName: 'Send Input Data',
+				name: 'sendInputData',
+				type: 'boolean',
+				default: true,
+				description: 'Send the the data the node receives as JSON to Kafka.',
+			},
+			{
+				displayName: 'Message',
+				name: 'message',
+				type: 'string',
+				displayOptions: {
+					show: {
+						sendInputData: [
+							false,
+						],
+					},
+				},
+				default: '',
+				description: 'The message to be sent.',
+			},
+			{
+				displayName: 'Options',
+				name: 'options',
+				type: 'collection',
+				default: {},
+				placeholder: 'Add Option',
+				options: rabbitDefaultOptions,
+			},
+		],
+	};
+
+	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
+		let channel;
+		try {
+			const items = this.getInputData();
+
+			const queue = this.getNodeParameter('queue', 0) as string;
+
+			const options = this.getNodeParameter('options', 0, {}) as IDataObject;
+
+			channel = await rabbitmqConnect.call(this, queue, options);
+
+			const sendInputData = this.getNodeParameter('sendInputData', 0) as boolean;
+
+			let message: string;
+
+			const queuePromises = [];
+			for (let i = 0; i < items.length; i++) {
+				if (sendInputData === true) {
+					message = JSON.stringify(items[i].json);
+				} else {
+					message = this.getNodeParameter('message', i) as string;
+				}
+
+				queuePromises.push(channel.sendToQueue(queue, Buffer.from(message)));
+			}
+
+			// @ts-ignore
+			const promisesResponses = await Promise.allSettled(queuePromises);
+
+			const returnItems: INodeExecutionData[] = [];
+
+			promisesResponses.forEach((response: IDataObject) => {
+				if (response!.status !== 'fulfilled') {
+
+					if (this.continueOnFail() !== true) {
+						throw new Error(response!.reason as string);
+					} else {
+						// Return the actual reason as error
+						returnItems.push(
+							{
+								json: {
+									error: response.reason,
+								},
+							},
+						);
+						return;
+					}
+				}
+
+				returnItems.push({
+					json: {
+						success: response.value,
+					},
+				});
+			});
+
+			await channel.close();
+
+			return this.prepareOutputData(returnItems);
+		} catch (error) {
+			if (channel) {
+				await channel.close();
+			}
+			throw error;
+		}
+	}
+}