import { OptionsWithUri } from 'request'; import { IExecuteFunctions, IExecuteSingleFunctions, ILoadOptionsFunctions } from 'n8n-core'; import { // ICredentialDataDecryptedObject, ICredentialTestFunctions, IDataObject, INodeProperties, NodeApiError, } from 'n8n-workflow'; import moment from 'moment-timezone'; import jwt from 'jsonwebtoken'; interface IGoogleAuthCredentials { delegatedEmail?: string; email: string; inpersonate: boolean; privateKey: string; } export async function googleApiRequest( this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, method: string, resource: string, body: any = {}, qs: IDataObject = {}, uri?: string, noCredentials = false, encoding?: null | undefined, ): Promise { const options: OptionsWithUri = { headers: { 'Content-Type': 'application/json', }, method, body, qs, uri: uri || `https://chat.googleapis.com${resource}`, json: true, }; if (Object.keys(body).length === 0) { delete options.body; } if (encoding === null) { options.encoding = null; } let responseData: IDataObject | undefined; try { if (noCredentials) { //@ts-ignore responseData = await this.helpers.request(options); } else { const credentials = await this.getCredentials('googleApi'); const { access_token } = await getAccessToken.call( this, credentials as unknown as IGoogleAuthCredentials, ); options.headers!.Authorization = `Bearer ${access_token}`; //@ts-ignore responseData = await this.helpers.request(options); } } catch (error) { if (error.code === 'ERR_OSSL_PEM_NO_START_LINE') { error.statusCode = '401'; } throw new NodeApiError(this.getNode(), error); } if (Object.keys(responseData as IDataObject).length !== 0) { return responseData; } else { return { success: true }; } } export async function googleApiRequestAllItems( this: IExecuteFunctions | ILoadOptionsFunctions, propertyName: string, method: string, endpoint: string, body: any = {}, query: IDataObject = {}, ): Promise { const returnData: IDataObject[] = []; let responseData; query.pageSize = 100; do { responseData = await googleApiRequest.call(this, method, endpoint, body, query); query.pageToken = responseData.nextPageToken; returnData.push.apply(returnData, responseData[propertyName]); } while (responseData.nextPageToken !== undefined && responseData.nextPageToken !== ''); return returnData; } export async function getAccessToken( this: | IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions | ICredentialTestFunctions, credentials: IGoogleAuthCredentials, ): Promise { //https://developers.google.com/identity/protocols/oauth2/service-account#httprest const scopes = ['https://www.googleapis.com/auth/chat.bot']; const now = moment().unix(); credentials.email = credentials.email.trim(); const privateKey = credentials.privateKey.replace(/\\n/g, '\n').trim(); const signature = jwt.sign( { iss: credentials.email, sub: credentials.delegatedEmail || credentials.email, scope: scopes.join(' '), aud: `https://oauth2.googleapis.com/token`, iat: now, exp: now + 3600, }, privateKey, { algorithm: 'RS256', header: { kid: privateKey, typ: 'JWT', alg: 'RS256', }, }, ); const options: OptionsWithUri = { headers: { 'Content-Type': 'application/x-www-form-urlencoded', }, method: 'POST', form: { grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer', assertion: signature, }, uri: 'https://oauth2.googleapis.com/token', json: true, }; return this.helpers.request!(options); } export function validateJSON(json: string | undefined): any { let result; try { result = JSON.parse(json!); } catch (exception) { result = undefined; } return result; } export function getPagingParameters(resource: string, operation = 'getAll') { const pagingParameters: INodeProperties[] = [ { displayName: 'Return All', name: 'returnAll', type: 'boolean', displayOptions: { show: { resource: [resource], operation: [operation], }, }, default: false, description: 'Whether to return all results or only up to a given limit', }, { displayName: 'Limit', name: 'limit', type: 'number', typeOptions: { maxValue: 1000, }, displayOptions: { show: { resource: [resource], operation: [operation], returnAll: [false], }, }, default: 100, description: 'Max number of results to return', }, ]; return pagingParameters; }