first commit

packages/nodes-base/nodes/Slack/V1/GenericFunctions.ts

@@ -0,0 +1,128 @@
+import get from 'lodash/get';
+import type {
+	IExecuteFunctions,
+	ILoadOptionsFunctions,
+	IDataObject,
+	IOAuth2Options,
+	JsonObject,
+	IHttpRequestMethods,
+	IRequestOptions,
+} from 'n8n-workflow';
+import { NodeApiError, NodeOperationError } from 'n8n-workflow';
+
+export async function slackApiRequest(
+	this: IExecuteFunctions | ILoadOptionsFunctions,
+	method: IHttpRequestMethods,
+	resource: string,
+	body: object = {},
+	query: IDataObject = {},
+	headers: IDataObject | undefined = undefined,
+	option: IDataObject = {},
+): Promise<any> {
+	const authenticationMethod = this.getNodeParameter('authentication', 0, 'accessToken') as string;
+	let options: IRequestOptions = {
+		method,
+		headers: headers || {
+			'Content-Type': 'application/json; charset=utf-8',
+		},
+		body,
+		qs: query,
+		uri: `https://slack.com/api${resource}`,
+		json: true,
+	};
+	options = Object.assign({}, options, option);
+	if (Object.keys(body).length === 0) {
+		delete options.body;
+	}
+	if (Object.keys(query).length === 0) {
+		delete options.qs;
+	}
+
+	const oAuth2Options: IOAuth2Options = {
+		tokenType: 'Bearer',
+		property: 'authed_user.access_token',
+	};
+
+	try {
+		const credentialType = authenticationMethod === 'accessToken' ? 'slackApi' : 'slackOAuth2Api';
+		const response = await this.helpers.requestWithAuthentication.call(
+			this,
+			credentialType,
+			options,
+			{
+				oauth2: oAuth2Options,
+			},
+		);
+
+		if (response.ok === false) {
+			if (response.error === 'paid_teams_only') {
+				throw new NodeOperationError(
+					this.getNode(),
+					`Your current Slack plan does not include the resource '${this.getNodeParameter(
+						'resource',
+						0,
+					)}'`,
+					{
+						description:
+							'Hint: Upgrate to the Slack plan that includes the funcionality you want to use.',
+					},
+				);
+			}
+
+			throw new NodeOperationError(
+				this.getNode(),
+				'Slack error response: ' + JSON.stringify(response),
+			);
+		}
+
+		return response;
+	} catch (error) {
+		throw new NodeApiError(this.getNode(), error as JsonObject);
+	}
+}
+
+export async function slackApiRequestAllItems(
+	this: IExecuteFunctions | ILoadOptionsFunctions,
+	propertyName: string,
+	method: IHttpRequestMethods,
+	endpoint: string,
+
+	body: any = {},
+	query: IDataObject = {},
+): Promise<any> {
+	const returnData: IDataObject[] = [];
+	let responseData;
+	query.page = 1;
+	//if the endpoint uses legacy pagination use count
+	//https://api.slack.com/docs/pagination#classic
+	if (endpoint.includes('files.list')) {
+		query.count = 100;
+	} else {
+		query.limit = 100;
+	}
+	do {
+		responseData = await slackApiRequest.call(this, method, endpoint, body as IDataObject, query);
+		query.cursor = get(responseData, 'response_metadata.next_cursor');
+		query.page++;
+		returnData.push.apply(returnData, responseData[propertyName] as IDataObject[]);
+	} while (
+		(responseData.response_metadata?.next_cursor !== undefined &&
+			responseData.response_metadata.next_cursor !== '' &&
+			responseData.response_metadata.next_cursor !== null) ||
+		(responseData.paging?.pages !== undefined &&
+			responseData.paging.page !== undefined &&
+			responseData.paging.page < responseData.paging.pages)
+	);
+
+	return returnData;
+}
+
+export function validateJSON(json: string | undefined): any {
+	let result;
+	try {
+		result = JSON.parse(json!);
+	} catch (exception) {
+		result = undefined;
+	}
+	return result;
+}