feat: Human in the loop (#10675)

Co-authored-by: Giulio Andreini <g.andreini@gmail.com>

packages/nodes-base/nodes/Slack/V2/GenericFunctions.ts

@@ -11,6 +11,7 @@ import type {
 import { NodeOperationError } from 'n8n-workflow';
 
 import get from 'lodash/get';
+import { getSendAndWaitConfig } from '../../../utils/sendAndWait/utils';
 
 export async function slackApiRequest(
 	this: IExecuteFunctions | ILoadOptionsFunctions | IWebhookFunctions,
@@ -219,3 +220,81 @@ export function validateJSON(json: string | undefined): any {
 	}
 	return result;
 }
+
+export function getTarget(
+	context: IExecuteFunctions,
+	itemIndex: number,
+	idType: 'user' | 'channel',
+): string {
+	let target = '';
+
+	if (idType === 'channel') {
+		target = context.getNodeParameter('channelId', itemIndex, undefined, {
+			extractValue: true,
+		}) as string;
+	} else {
+		target = context.getNodeParameter('user', itemIndex, undefined, {
+			extractValue: true,
+		}) as string;
+	}
+
+	if (
+		idType === 'user' &&
+		(context.getNodeParameter('user', itemIndex) as IDataObject).mode === 'username'
+	) {
+		target = target.slice(0, 1) === '@' ? target : `@${target}`;
+	}
+
+	return target;
+}
+
+export function createSendAndWaitMessageBody(context: IExecuteFunctions) {
+	const select = context.getNodeParameter('select', 0) as 'user' | 'channel';
+	const target = getTarget(context, 0, select);
+
+	const config = getSendAndWaitConfig(context);
+
+	const body: IDataObject = {
+		channel: target,
+		blocks: [
+			{
+				type: 'divider',
+			},
+			{
+				type: 'section',
+				text: {
+					type: 'plain_text',
+					text: config.message,
+					emoji: true,
+				},
+			},
+			{
+				type: 'section',
+				text: {
+					type: 'plain_text',
+					text: ' ',
+				},
+			},
+			{
+				type: 'divider',
+			},
+			{
+				type: 'actions',
+				elements: config.options.map((option) => {
+					return {
+						type: 'button',
+						style: option.style === 'primary' ? 'primary' : undefined,
+						text: {
+							type: 'plain_text',
+							text: option.label,
+							emoji: true,
+						},
+						url: `${config.url}?approved=${option.value}`,
+					};
+				}),
+			},
+		],
+	};
+
+	return body;
+}