n8n/packages/nodes-base/nodes/Google/Chat/GenericFunctions.ts

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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<any> {
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<any> {
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<IDataObject> {
//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;
}