⚡ Add Ephemeral Message support (#1302)

* Add postEphemeral on Slack node

* ⚡ Add ephemeral option to message:post

* ⚡ Small fix

Co-authored-by: davinerd <anathema@anche.no>

packages/nodes-base/nodes/Slack/MessageDescription.ts

@@ -1,4 +1,6 @@
-import { INodeProperties } from 'n8n-workflow';
+import { 
+	INodeProperties,
+} from 'n8n-workflow';
 
 export const messageOperations = [
 	{
@@ -34,6 +36,25 @@ export const messageFields = [
 	/* -------------------------------------------------------------------------- */
 	/*                                message:post                                */
 	/* -------------------------------------------------------------------------- */
+	{
+		displayName: 'Ephemeral',
+		name: 'ephemeral',
+		type: 'boolean',
+		default: false,
+		displayOptions: {
+			show: {
+				operation: [
+					'post',
+				],
+				resource: [
+					'message',
+				],
+			},
+		},
+		description: `Ephemeral messages behave differently from regular messages on Slack.<br/>
+		They disappear when Slack reloads and won’t show up again when Slack is opened in a <br/>
+		new browser window or on a different device`,
+	},
 	{
 		displayName: 'Channel',
 		name: 'channel',
@@ -53,6 +74,28 @@ export const messageFields = [
 		required: true,
 		description: 'The channel to send the message to.',
 	},
+	{
+		displayName: 'User',
+		name: 'user',
+		type: 'string',
+		default: '',
+		placeholder: 'User ID',
+		displayOptions: {
+			show: {
+				operation: [
+					'post',
+				],
+				resource: [
+					'message',
+				],
+				ephemeral: [
+					true,
+				],
+			},
+		},
+		required: true,
+		description: 'The user ID to send the message to.',
+	},
 	{
 		displayName: 'Text',
 		name: 'text',
@@ -401,6 +444,19 @@ export const messageFields = [
 				name: 'mrkdwn',
 				type: 'boolean',
 				default: true,
+				displayOptions: {
+					show: {
+						'/operation': [
+							'post',
+						],
+						'/resource': [
+							'message',
+						],
+						'/ephemeral': [
+							false,
+						],
+					},
+				},
 				description: 'Use Slack Markdown parsing.',
 			},
 			{
@@ -408,6 +464,19 @@ export const messageFields = [
 				name: 'reply_broadcast',
 				type: 'boolean',
 				default: false,
+				displayOptions: {
+					show: {
+						'/operation': [
+							'post',
+						],
+						'/resource': [
+							'message',
+						],
+						'/ephemeral': [
+							false,
+						],
+					},
+				},
 				description: 'Used in conjunction with thread_ts and indicates whether reply should be made visible to everyone in the channel or conversation.',
 			},
 			{
@@ -415,6 +484,19 @@ export const messageFields = [
 				name: 'unfurl_links',
 				type: 'boolean',
 				default: false,
+				displayOptions: {
+					show: {
+						'/operation': [
+							'post',
+						],
+						'/resource': [
+							'message',
+						],
+						'/ephemeral': [
+							false,
+						],
+					},
+				},
 				description: 'Pass true to enable unfurling of primarily text-based content.',
 			},
 			{
@@ -422,6 +504,19 @@ export const messageFields = [
 				name: 'unfurl_media',
 				type: 'boolean',
 				default: true,
+				displayOptions: {
+					show: {
+						'/operation': [
+							'post',
+						],
+						'/resource': [
+							'message',
+						],
+						'/ephemeral': [
+							false,
+						],
+					},
+				},
 				description: 'Pass false to disable unfurling of media content.',
 			},
 		],

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

@@ -516,12 +516,20 @@ export class Slack implements INodeType {
 				//https://api.slack.com/methods/chat.postMessage
 				if (operation === 'post') {
 					const channel = this.getNodeParameter('channel', i) as string;
+					const ephemeral = this.getNodeParameter('ephemeral', i) as boolean;
 					const text = this.getNodeParameter('text', i) as string;
 					const body: IDataObject = {
 						channel,
 						text,
 					};
 
+					let action = 'postMessage';
+
+					if (ephemeral) {
+						body.user = this.getNodeParameter('user', i) as string;
+						action = 'postEphemeral';
+					}
+
 					const jsonParameters = this.getNodeParameter('jsonParameters', i) as boolean;
 
 					if (authentication === 'accessToken') {
@@ -752,10 +760,11 @@ export class Slack implements INodeType {
 							body.blocks = blocksJson;
 						}
 					}
+
 					// Add all the other options to the request
 					const otherOptions = this.getNodeParameter('otherOptions', i) as IDataObject;
 					Object.assign(body, otherOptions);
-					responseData = await slackApiRequest.call(this, 'POST', '/chat.postMessage', body, qs);
+					responseData = await slackApiRequest.call(this, 'POST', `/chat.${action}`, body, qs);
 				}
 				//https://api.slack.com/methods/chat.update
 				if (operation === 'update') {