feat(RSS Feed Trigger Node): Add RSS feed trigger node (#7386)

Github issue / Community forum post (link here to close automatically):
https://community.n8n.io/t/rss-trigger/14203

packages/nodes-base/nodes/RssFeedRead/RssFeedReadTrigger.node.json

@@ -0,0 +1,13 @@
+{
+	"node": "n8n-nodes-base.rssFeedReadTrigger",
+	"nodeVersion": "1.0",
+	"codexVersion": "1.0",
+	"categories": ["Core Nodes"],
+	"resources": {
+		"primaryDocumentation": [
+			{
+				"url": "https://docs.n8n.io/integrations/builtin/core-nodes/n8n-nodes-base.rssfeedreadtrigger/"
+			}
+		]
+	}
+}

packages/nodes-base/nodes/RssFeedRead/RssFeedReadTrigger.node.ts

@@ -0,0 +1,89 @@
+import type {
+	IDataObject,
+	INodeExecutionData,
+	INodeType,
+	INodeTypeDescription,
+	IPollFunctions,
+} from 'n8n-workflow';
+import { NodeOperationError } from 'n8n-workflow';
+import Parser from 'rss-parser';
+import moment from 'moment';
+
+export class RssFeedReadTrigger implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'RSS Feed Trigger',
+		name: 'rssFeedReadTrigger',
+		icon: 'fa:rss',
+		group: ['trigger'],
+		version: 1,
+		description: 'Starts a workflow when an RSS feed is updated',
+		subtitle: '={{$parameter["event"]}}',
+		defaults: {
+			name: 'RSS Feed Trigger',
+			color: '#b02020',
+		},
+		polling: true,
+		inputs: [],
+		outputs: ['main'],
+		properties: [
+			{
+				displayName: 'Feed URL',
+				name: 'feedUrl',
+				type: 'string',
+				default: 'https://blog.n8n.io/rss/',
+				required: true,
+				description: 'URL of the RSS feed to poll',
+			},
+		],
+	};
+
+	async poll(this: IPollFunctions): Promise<INodeExecutionData[][] | null> {
+		const pollData = this.getWorkflowStaticData('node');
+		const feedUrl = this.getNodeParameter('feedUrl') as string;
+
+		const now = moment().utc().format();
+		const startDate = (pollData.lastTimeChecked as string) || now;
+
+		const endDate = now;
+
+		if (!feedUrl) {
+			throw new NodeOperationError(this.getNode(), 'The parameter "URL" has to be set!');
+		}
+
+		const parser = new Parser();
+
+		let feed: Parser.Output<IDataObject>;
+		try {
+			feed = await parser.parseURL(feedUrl);
+		} catch (error) {
+			if (error.code === 'ECONNREFUSED') {
+				throw new NodeOperationError(
+					this.getNode(),
+					`It was not possible to connect to the URL. Please make sure the URL "${feedUrl}" it is valid!`,
+				);
+			}
+
+			throw new NodeOperationError(this.getNode(), error as Error);
+		}
+
+		const returnData: IDataObject[] = [];
+
+		if (feed.items) {
+			if (this.getMode() === 'manual') {
+				return [this.helpers.returnJsonArray(feed.items[0])];
+			}
+			feed.items.forEach((item) => {
+				if (Date.parse(item.isoDate as string) >= Date.parse(startDate)) {
+					returnData.push(item);
+				}
+			});
+		}
+		pollData.lastTimeChecked = endDate;
+
+		if (Array.isArray(returnData) && returnData.length !== 0) {
+			return [this.helpers.returnJsonArray(returnData)];
+		}
+
+		return null;
+	}
+}

packages/nodes-base/package.json

@@ -684,6 +684,7 @@
       "dist/nodes/RespondToWebhook/RespondToWebhook.node.js",
       "dist/nodes/Rocketchat/Rocketchat.node.js",
       "dist/nodes/RssFeedRead/RssFeedRead.node.js",
+      "dist/nodes/RssFeedRead/RssFeedReadTrigger.node.js",
       "dist/nodes/Rundeck/Rundeck.node.js",
       "dist/nodes/S3/S3.node.js",
       "dist/nodes/Salesforce/Salesforce.node.js",