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

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+/* eslint-disable n8n-nodes-base/node-param-default-missing */
+import type { INodePropertyMode } from 'n8n-workflow';
+
+export const slackChannelModes: INodePropertyMode[] = [
+	{
+		displayName: 'From List',
+		name: 'list',
+		type: 'list',
+		placeholder: 'Select a channel...',
+		typeOptions: {
+			searchListMethod: 'getChannels',
+			searchable: true,
+			slowLoadNotice: {
+				message: 'If loading is slow, try selecting a channel using "By ID" or "By URL"',
+				timeout: 15000,
+			},
+		},
+	},
+	{
+		displayName: 'By ID',
+		name: 'id',
+		type: 'string',
+		validation: [
+			{
+				type: 'regex',
+				properties: {
+					regex: '[a-zA-Z0-9]{2,}',
+					errorMessage: 'Not a valid Slack Channel ID',
+				},
+			},
+		],
+		placeholder: 'C0122KQ70S7E',
+	},
+	{
+		displayName: 'By URL',
+		name: 'url',
+		type: 'string',
+		placeholder: 'https://app.slack.com/client/TS9594PZK/B0556F47Z3A',
+		validation: [
+			{
+				type: 'regex',
+				properties: {
+					regex: 'http(s)?://app.slack.com/client/.*/([a-zA-Z0-9]{2,})',
+					errorMessage: 'Not a valid Slack Channel URL',
+				},
+			},
+		],
+		extractValue: {
+			type: 'regex',
+			regex: 'https://app.slack.com/client/.*/([a-zA-Z0-9]{2,})',
+		},
+	},
+];