n8n-enterprise-unlocked/packages/nodes-base/nodes/Google/Drive/v2/transport/index.ts

import type {
	IExecuteFunctions,
	IExecuteSingleFunctions,
	ILoadOptionsFunctions,
	IDataObject,
	IPollFunctions,
	JsonObject,
	IHttpRequestOptions,
	IHttpRequestMethods,
} from 'n8n-workflow';
import { NodeApiError } from 'n8n-workflow';
import { getGoogleAccessToken } from '../../../GenericFunctions';

export async function googleApiRequest(
	this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions | IPollFunctions,
	method: IHttpRequestMethods,
	resource: string,
	body: IDataObject | string | Buffer = {},
	qs: IDataObject = {},
	uri?: string,
	option: IDataObject = {},
) {
	const authenticationMethod = this.getNodeParameter(
		'authentication',
		0,
		'serviceAccount',
	) as string;

	let options: IHttpRequestOptions = {
		headers: {
			'Content-Type': 'application/json',
		},

		method,
		body,
		qs,
		url: uri || `https://www.googleapis.com${resource}`,
		json: true,
	};

	options = Object.assign({}, options, option);

	try {
		if (Object.keys(body).length === 0) {
			delete options.body;
		}

		if (authenticationMethod === 'serviceAccount') {
			const credentials = await this.getCredentials('googleApi');

			const { access_token } = await getGoogleAccessToken.call(this, credentials, 'drive');

			options.headers!.Authorization = `Bearer ${access_token}`;
			return await this.helpers.httpRequest(options);
		} else {
			return await this.helpers.requestOAuth2.call(this, 'googleDriveOAuth2Api', options);
		}
	} catch (error) {
		if (error.code === 'ERR_OSSL_PEM_NO_START_LINE') {
			error.statusCode = '401';
		}

		const apiError = new NodeApiError(
			this.getNode(),
			{
				reason: error.error,
			} as JsonObject,
			{ httpCode: String(error.statusCode) },
		);

		if (
			apiError.message &&
			apiError.description &&
			(apiError.message.toLowerCase().includes('bad request') ||
				apiError.message.toLowerCase().includes('forbidden') ||
				apiError.message.toUpperCase().includes('UNKNOWN ERROR'))
		) {
			const message = apiError.message;
			apiError.message = apiError.description;
			apiError.description = message;
		}

		throw apiError;
	}
}

export async function googleApiRequestAllItems(
	this: IExecuteFunctions | ILoadOptionsFunctions | IPollFunctions,
	method: IHttpRequestMethods,
	propertyName: string,
	endpoint: string,
	body: IDataObject = {},
	query: IDataObject = {},
) {
	const returnData: IDataObject[] = [];

	let responseData;
	query.maxResults = query.maxResults || 100;
	query.pageSize = query.pageSize || 100;

	do {
		responseData = await googleApiRequest.call(this, method, endpoint, body, query);
		returnData.push.apply(returnData, responseData[propertyName] as IDataObject[]);

		if (responseData.nextPageToken) {
			query.pageToken = responseData.nextPageToken as string;
		}
	} while (responseData.nextPageToken !== undefined && responseData.nextPageToken !== '');

	return returnData;
}