n8n/packages/nodes-base/nodes/GraphQL/GraphQL.node.ts

/* eslint-disable n8n-nodes-base/node-filename-against-convention */
import { IExecuteFunctions } from 'n8n-core';
import {
	IDataObject,
	INodeExecutionData,
	INodeType,
	INodeTypeDescription,
	NodeApiError,
	NodeOperationError,
} from 'n8n-workflow';

import { OptionsWithUri } from 'request';
import { RequestPromiseOptions } from 'request-promise-native';

export class GraphQL implements INodeType {
	description: INodeTypeDescription = {
		displayName: 'GraphQL',
		name: 'graphql',
		// eslint-disable-next-line n8n-nodes-base/node-class-description-icon-not-svg
		icon: 'file:graphql.png',
		group: ['input'],
		version: 1,
		description: 'Makes a GraphQL request and returns the received data',
		defaults: {
			name: 'GraphQL',
		},
		inputs: ['main'],
		outputs: ['main'],
		credentials: [
			{
				name: 'httpBasicAuth',
				required: true,
				displayOptions: {
					show: {
						authentication: ['basicAuth'],
					},
				},
			},
			{
				name: 'httpDigestAuth',
				required: true,
				displayOptions: {
					show: {
						authentication: ['digestAuth'],
					},
				},
			},
			{
				name: 'httpHeaderAuth',
				required: true,
				displayOptions: {
					show: {
						authentication: ['headerAuth'],
					},
				},
			},
			{
				name: 'httpQueryAuth',
				required: true,
				displayOptions: {
					show: {
						authentication: ['queryAuth'],
					},
				},
			},
			{
				name: 'oAuth1Api',
				required: true,
				displayOptions: {
					show: {
						authentication: ['oAuth1'],
					},
				},
			},
			{
				name: 'oAuth2Api',
				required: true,
				displayOptions: {
					show: {
						authentication: ['oAuth2'],
					},
				},
			},
		],
		properties: [
			{
				displayName: 'Authentication',
				name: 'authentication',
				type: 'options',
				options: [
					{
						name: 'Basic Auth',
						value: 'basicAuth',
					},
					{
						name: 'Digest Auth',
						value: 'digestAuth',
					},
					{
						name: 'Header Auth',
						value: 'headerAuth',
					},
					{
						name: 'None',
						value: 'none',
					},
					{
						name: 'OAuth1',
						value: 'oAuth1',
					},
					{
						name: 'OAuth2',
						value: 'oAuth2',
					},
					{
						name: 'Query Auth',
						value: 'queryAuth',
					},
				],
				default: 'none',
				description: 'The way to authenticate',
			},
			{
				displayName: 'HTTP Request Method',
				name: 'requestMethod',
				type: 'options',
				options: [
					{
						name: 'GET',
						value: 'GET',
					},
					{
						name: 'POST',
						value: 'POST',
					},
				],
				default: 'POST',
				description: 'The underlying HTTP request method to use',
			},
			{
				displayName: 'Endpoint',
				name: 'endpoint',
				type: 'string',
				default: '',
				placeholder: 'http://example.com/graphql',
				description: 'The GraphQL endpoint',
				required: true,
			},
			{
				displayName: 'Ignore SSL Issues',
				name: 'allowUnauthorizedCerts',
				type: 'boolean',
				default: false,
				// eslint-disable-next-line n8n-nodes-base/node-param-description-wrong-for-ignore-ssl-issues
				description:
					'Whether to download the response even if SSL certificate validation is not possible',
			},
			{
				displayName: 'Request Format',
				name: 'requestFormat',
				type: 'options',
				required: true,
				options: [
					{
						name: 'GraphQL (Raw)',
						value: 'graphql',
					},
					{
						name: 'JSON',
						value: 'json',
					},
				],
				displayOptions: {
					show: {
						requestMethod: ['POST'],
					},
				},
				default: 'graphql',
				description: 'The format for the query payload',
			},
			{
				displayName: 'Query',
				name: 'query',
				type: 'json',
				default: '',
				description: 'GraphQL query',
				required: true,
			},
			{
				displayName: 'Variables',
				name: 'variables',
				type: 'json',
				default: '',
				description: 'Query variables',
				displayOptions: {
					show: {
						requestFormat: ['json'],
						requestMethod: ['POST'],
					},
				},
			},
			{
				displayName: 'Operation Name',
				name: 'operationName',
				type: 'string',
				default: '',
				description: 'Name of operation to execute',
				displayOptions: {
					show: {
						requestFormat: ['json'],
						requestMethod: ['POST'],
					},
				},
			},
			{
				displayName: 'Response Format',
				name: 'responseFormat',
				type: 'options',
				options: [
					{
						name: 'JSON',
						value: 'json',
					},
					{
						name: 'String',
						value: 'string',
					},
				],
				default: 'json',
				description: 'The format in which the data gets returned from the URL',
			},
			{
				displayName: 'Response Data Property Name',
				name: 'dataPropertyName',
				type: 'string',
				default: 'data',
				required: true,
				displayOptions: {
					show: {
						responseFormat: ['string'],
					},
				},
				description: 'Name of the property to which to write the response data',
			},

			// Header Parameters
			{
				displayName: 'Headers',
				name: 'headerParametersUi',
				placeholder: 'Add Header',
				type: 'fixedCollection',
				typeOptions: {
					multipleValues: true,
				},
				description: 'The headers to send',
				default: {},
				options: [
					{
						name: 'parameter',
						displayName: 'Header',
						values: [
							{
								displayName: 'Name',
								name: 'name',
								type: 'string',
								default: '',
								description: 'Name of the header',
							},
							{
								displayName: 'Value',
								name: 'value',
								type: 'string',
								default: '',
								description: 'Value to set for the header',
							},
						],
					},
				],
			},
		],
	};

	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
		const items = this.getInputData();
		let httpBasicAuth;
		let httpDigestAuth;
		let httpHeaderAuth;
		let httpQueryAuth;
		let oAuth1Api;
		let oAuth2Api;

		try {
			httpBasicAuth = await this.getCredentials('httpBasicAuth');
		} catch (error) {
			// Do nothing
		}
		try {
			httpDigestAuth = await this.getCredentials('httpDigestAuth');
		} catch (error) {
			// Do nothing
		}
		try {
			httpHeaderAuth = await this.getCredentials('httpHeaderAuth');
		} catch (error) {
			// Do nothing
		}
		try {
			httpQueryAuth = await this.getCredentials('httpQueryAuth');
		} catch (error) {
			// Do nothing
		}
		try {
			oAuth1Api = await this.getCredentials('oAuth1Api');
		} catch (error) {
			// Do nothing
		}
		try {
			oAuth2Api = await this.getCredentials('oAuth2Api');
		} catch (error) {
			// Do nothing
		}

		let requestOptions: OptionsWithUri & RequestPromiseOptions;

		const returnItems: INodeExecutionData[] = [];
		for (let itemIndex = 0; itemIndex < items.length; itemIndex++) {
			try {
				const requestMethod = this.getNodeParameter('requestMethod', itemIndex, 'POST') as string;
				const endpoint = this.getNodeParameter('endpoint', itemIndex, '') as string;
				const requestFormat = this.getNodeParameter(
					'requestFormat',
					itemIndex,
					'graphql',
				) as string;
				const responseFormat = this.getNodeParameter('responseFormat', 0) as string;
				const { parameter }: { parameter?: Array<{ name: string; value: string }> } =
					this.getNodeParameter('headerParametersUi', itemIndex, {}) as IDataObject;
				const headerParameters = (parameter || []).reduce(
					(result, item) => ({
						...result,
						[item.name]: item.value,
					}),
					{},
				);

				requestOptions = {
					headers: {
						'content-type': `application/${requestFormat}`,
						...headerParameters,
					},
					method: requestMethod,
					uri: endpoint,
					simple: false,
					rejectUnauthorized: !this.getNodeParameter('allowUnauthorizedCerts', itemIndex, false),
				};

				// Add credentials if any are set
				if (httpBasicAuth !== undefined) {
					requestOptions.auth = {
						user: httpBasicAuth.user as string,
						pass: httpBasicAuth.password as string,
					};
				}
				if (httpHeaderAuth !== undefined) {
					requestOptions.headers![httpHeaderAuth.name as string] = httpHeaderAuth.value;
				}
				if (httpQueryAuth !== undefined) {
					if (!requestOptions.qs) {
						requestOptions.qs = {};
					}
					requestOptions.qs[httpQueryAuth.name as string] = httpQueryAuth.value;
				}
				if (httpDigestAuth !== undefined) {
					requestOptions.auth = {
						user: httpDigestAuth.user as string,
						pass: httpDigestAuth.password as string,
						sendImmediately: false,
					};
				}

				const gqlQuery = this.getNodeParameter('query', itemIndex, '') as string;
				if (requestMethod === 'GET') {
					if (!requestOptions.qs) {
						requestOptions.qs = {};
					}
					requestOptions.qs.query = gqlQuery;
				} else {
					if (requestFormat === 'json') {
						requestOptions.body = {
							query: gqlQuery,
							variables: this.getNodeParameter('variables', itemIndex, {}) as object,
							operationName: this.getNodeParameter('operationName', itemIndex) as string,
						};
						if (typeof requestOptions.body.variables === 'string') {
							try {
								requestOptions.body.variables = JSON.parse(requestOptions.body.variables || '{}');
							} catch (error) {
								throw new NodeOperationError(
									this.getNode(),
									'Using variables failed:\n' +
										requestOptions.body.variables +
										'\n\nWith error message:\n' +
										error,
									{ itemIndex },
								);
							}
						}
						if (requestOptions.body.operationName === '') {
							requestOptions.body.operationName = null;
						}
						requestOptions.json = true;
					} else {
						requestOptions.body = gqlQuery;
					}
				}

				let response;
				// Now that the options are all set make the actual http request
				if (oAuth1Api !== undefined) {
					response = await this.helpers.requestOAuth1.call(this, 'oAuth1Api', requestOptions);
				} else if (oAuth2Api !== undefined) {
					response = await this.helpers.requestOAuth2.call(this, 'oAuth2Api', requestOptions, {
						tokenType: 'Bearer',
					});
				} else {
					response = await this.helpers.request(requestOptions);
				}
				if (responseFormat === 'string') {
					const dataPropertyName = this.getNodeParameter('dataPropertyName', 0) as string;
					returnItems.push({
						json: {
							[dataPropertyName]: response,
						},
					});
				} else {
					if (typeof response === 'string') {
						try {
							response = JSON.parse(response);
						} catch (error) {
							throw new NodeOperationError(
								this.getNode(),
								'Response body is not valid JSON. Change "Response Format" to "String"',
								{ itemIndex },
							);
						}
					}

					if (response.errors) {
						const message =
							response.errors?.map((error: IDataObject) => error.message).join(', ') ||
							'Unexpected error';
						throw new NodeApiError(this.getNode(), response.errors, { message });
					}
					const executionData = this.helpers.constructExecutionMetaData(
						this.helpers.returnJsonArray(response),
						{ itemData: { item: itemIndex } },
					);
					returnItems.push(...executionData);
				}
			} catch (error) {
				if (this.continueOnFail()) {
					const errorData = this.helpers.returnJsonArray({
						$error: error,
						json: this.getInputData(itemIndex),
						itemIndex,
					});
					const exectionErrorWithMetaData = this.helpers.constructExecutionMetaData(errorData, {
						itemData: { item: itemIndex },
					});
					returnItems.push(...exectionErrorWithMetaData);
					continue;
				}
				throw error;
			}
		}

		return this.prepareOutputData(returnItems);
	}
}