✨ Feature/slack node extended (#1239)

* Added reaction method to message

* Increased limit for channels on getChannels, removed unused fields in the code

* Using own operation for reactions

* Registering reaction fields and operations

* Added Operation "Reaction" to Slack.node.ts

* Fixing variable name for emoji

* now removing reaction on "remove" instead of "add"

* Using GET for reactions.get and passing arguments as query

* Added members operation

* Fixed typo in timestamp

* Added user.info and user.getPresence

* Fixed: wrong operation name

* ⚡ Improvements to #1238

* ⚡ Add field resolve data when retrieving channel members

* ⚡ Minor improvements to Slack-Node

Co-authored-by: Andreas Scherren <ascherren@brightfuture.de>
Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>

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

@@ -0,0 +1,85 @@
+import {
+	INodeProperties,
+} from 'n8n-workflow';
+
+export const userOperations = [
+	{
+		displayName: 'Operation',
+		name: 'operation',
+		type: 'options',
+		displayOptions: {
+			show: {
+				resource: [
+					'user',
+				],
+			},
+		},
+		options: [
+			{
+				name: 'Info',
+				value: 'info',
+				description: `Get information about a user`,
+			},
+			{
+				name: 'Get Presence',
+				value: 'getPresence',
+				description: `Get online status of a user`,
+			},
+		],
+		default: 'info',
+		description: 'The operation to perform.',
+	},
+] as INodeProperties[];
+
+export const userFields = [
+
+	/* -------------------------------------------------------------------------- */
+	/*                                user:info                                   */
+	/* -------------------------------------------------------------------------- */
+	{
+		displayName: 'User ID',
+		name: 'user',
+		type: 'string',
+		typeOptions: {
+			loadOptionsMethod: 'getUsers',
+		},
+		default: '',
+		displayOptions: {
+			show: {
+				operation: [
+					'info',
+				],
+				resource: [
+					'user',
+				],
+			},
+		},
+		required: true,
+		description: 'The ID of the user to get information about.',
+	},
+
+	/* -------------------------------------------------------------------------- */
+	/*                                user:getPresence                            */
+	/* -------------------------------------------------------------------------- */
+	{
+		displayName: 'User ID',
+		name: 'user',
+		type: 'string',
+		typeOptions: {
+			loadOptionsMethod: 'getUsers',
+		},
+		default: '',
+		displayOptions: {
+			show: {
+				operation: [
+					'getPresence',
+				],
+				resource: [
+					'user',
+				],
+			},
+		},
+		required: true,
+		description: 'The ID of the user to get the online status of.',
+	},
+] as INodeProperties[];