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

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import type { OptionsWithUri } from 'request';
import type {
IExecuteFunctions,
ILoadOptionsFunctions,
IDataObject,
JsonObject,
} from 'n8n-workflow';
import { NodeApiError } from 'n8n-workflow';
import moment from 'moment-timezone';
import jwt from 'jsonwebtoken';
interface IGoogleAuthCredentials {
delegatedEmail?: string;
email: string;
inpersonate: boolean;
privateKey: string;
}
async function getAccessToken(
this: IExecuteFunctions | ILoadOptionsFunctions,
credentials: IGoogleAuthCredentials,
): Promise<IDataObject> {
//https://developers.google.com/identity/protocols/oauth2/service-account#httprest
const scopes = [
'https://www.googleapis.com/auth/documents',
'https://www.googleapis.com/auth/drive',
'https://www.googleapis.com/auth/drive.file',
];
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 async function googleApiRequest(
this: IExecuteFunctions | ILoadOptionsFunctions,
method: string,
endpoint: string,
body: IDataObject = {},
qs?: IDataObject,
uri?: string,
) {
const authenticationMethod = this.getNodeParameter(
'authentication',
0,
'serviceAccount',
) as string;
const options: OptionsWithUri = {
headers: {
'Content-Type': 'application/json',
},
method,
body,
qs,
uri: uri || `https://docs.googleapis.com/v1${endpoint}`,
json: true,
};
if (!Object.keys(body).length) {
delete options.body;
}
try {
if (authenticationMethod === 'serviceAccount') {
const credentials = await this.getCredentials('googleApi');
const { access_token } = await getAccessToken.call(
this,
credentials as unknown as IGoogleAuthCredentials,
);
options.headers!.Authorization = `Bearer ${access_token}`;
return await this.helpers.request(options);
} else {
return await this.helpers.requestOAuth2.call(this, 'googleDocsOAuth2Api', options);
}
} catch (error) {
throw new NodeApiError(this.getNode(), error as JsonObject);
}
}
export async function googleApiRequestAllItems(
this: IExecuteFunctions | ILoadOptionsFunctions,
propertyName: string,
method: string,
endpoint: string,
body: IDataObject = {},
qs?: IDataObject,
uri?: string,
): Promise<any> {
const returnData: IDataObject[] = [];
let responseData;
const query: IDataObject = { ...qs };
query.maxResults = 100;
query.pageSize = 100;
do {
responseData = await googleApiRequest.call(this, method, endpoint, body, query, uri);
query.pageToken = responseData.nextPageToken;
returnData.push.apply(returnData, responseData[propertyName] as IDataObject[]);
} while (responseData.nextPageToken !== undefined && responseData.nextPageToken !== '');
return returnData;
}
export const hasKeys = (obj = {}) => Object.keys(obj).length > 0;
export const extractID = (url: string) => {
const regex = new RegExp('https://docs.google.com/document/d/([a-zA-Z0-9-_]+)/');
const results = regex.exec(url);
return results ? results[1] : undefined;
};
export const upperFirst = (str: string) => {
return str[0].toUpperCase() + str.substr(1);
};