Add Facebook Graph API node

packages/nodes-base/credentials/GraphApi.credentials.ts

@@ -0,0 +1,18 @@
+import {
+	ICredentialType,
+	NodePropertyTypes,
+} from 'n8n-workflow';
+
+
+export class GraphApi implements ICredentialType {
+	name = 'graphApi';
+	displayName = 'Graph API';
+	properties = [
+		{
+			displayName: 'Access Token',
+			name: 'accessToken',
+			type: 'string' as NodePropertyTypes,
+			default: '',
+		},
+	];
+}

packages/nodes-base/nodes/Facebook/GraphApi.node.ts

@@ -0,0 +1,416 @@
+import {
+	BINARY_ENCODING,
+	IExecuteFunctions,
+} from 'n8n-core';
+import {
+	IBinaryData,
+	IDataObject,
+	INodeExecutionData,
+	INodeType,
+	INodeTypeDescription,
+} from 'n8n-workflow';
+
+import { OptionsWithUri } from 'request';
+
+export class GraphApi implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'Graph API',
+		name: 'graphApi',
+		icon: 'file:facebook.png',
+		group: ['transform'],
+		version: 1,
+		description: 'Interacts with Facebook using the Graph API',
+		defaults: {
+			name: 'Graph API',
+			color: '#772244',
+		},
+		inputs: ['main'],
+		outputs: ['main', 'main'],
+		outputNames: ['success', 'failure'],
+		credentials: [
+			{
+				name: 'graphApi',
+				required: true,
+			},
+		],
+		properties: [
+			{
+				displayName: 'Host URL',
+				name: 'hostUrl',
+				type: 'options',
+				options: [
+					{
+						name: 'Default',
+						value: 'graph.facebook.com',
+					},
+					{
+						name: 'Video Uploads',
+						value: 'graph-video.facebook.com',
+					}
+				],
+				default: 'graph.facebook.com',
+				description: 'The Host URL of the request. Almost all requests are passed to the graph.facebook.com host URL. The single exception is video uploads, which use graph-video.facebook.com.',
+				required: true,
+			},
+			{
+				displayName: 'HTTP Request Method',
+				name: 'httpRequestMethod',
+				type: 'options',
+				options: [
+					{
+						name: 'GET',
+						value: 'GET',
+					},
+					{
+						name: 'POST',
+						value: 'POST',
+					},
+					{
+						name: 'DELETE',
+						value: 'DELETE',
+					},
+				],
+				default: 'GET',
+				description: 'The HTTP Method to be used for the request.',
+				required: true,
+			},
+			{
+				displayName: 'Graph API Version',
+				name: 'graphApiVersion',
+				type: 'options',
+				options: [
+					{
+						name: 'Latest',
+						value: '',
+					},
+					{
+						name: 'v6.0',
+						value: 'v6.0/',
+					},
+					{
+						name: 'v5.0',
+						value: 'v5.0/',
+					},
+					{
+						name: 'v4.0',
+						value: 'v4.0/',
+					},
+					{
+						name: 'v3.3',
+						value: 'v3.3/',
+					},
+					{
+						name: 'v3.2',
+						value: 'v3.2/',
+					},
+					{
+						name: 'v3.1',
+						value: 'v3.1/',
+					},
+					{
+						name: 'v3.0',
+						value: 'v3.0/',
+					},
+					{
+						name: 'v2.12',
+						value: 'v2.12/',
+					},
+				],
+				default: '',
+				description: 'The version of the Graph API to be used in the request.',
+				required: true,
+			},
+			{
+				displayName: 'Node',
+				name: 'node',
+				type: 'string',
+				default: '',
+				description: 'The node on which to operate. A node is an individual object with a unique ID. For example, there are many User node objects, each with a unique ID representing a person on Facebook.',
+				placeholder: 'me',
+				required: true,
+			},
+			{
+				displayName: 'Edge',
+				name: 'edge',
+				type: 'string',
+				default: '',
+				description: 'Edge of the node on which to operate. Edges represent collections of objects wich are attached to the node.',
+				placeholder: 'videos',
+				required: false,
+			},
+			{
+				displayName: 'Send Binary Data',
+				name: 'sendBinaryData',
+				type: 'boolean',
+				displayOptions: {
+					show: {
+						httpRequestMethod: [
+							'POST',
+							'PUT',
+						],
+					},
+				},
+				default: false,
+				required: true,
+				description: 'If binary data should be send as body.',
+			},
+			{
+				displayName: 'Binary Property',
+				name: 'binaryPropertyName',
+				type: 'string',
+				required: false,
+				default: '',
+				placeholder: 'file:data',
+				displayOptions: {
+					hide: {
+						sendBinaryData: [
+							false,
+						],
+					},
+					show: {
+						httpRequestMethod: [
+							'POST',
+							'PUT',
+						],
+					},
+				},
+				description: `Name of the binary property which contains the data for the file to be uploaded.<br />
+							For Form-Data Multipart, multiple can be provided in the format:<br />
+							"sendKey1:binaryProperty1,sendKey2:binaryProperty2`,
+			},
+			{
+				displayName: 'Options',
+				name: 'options',
+				type: 'collection',
+				placeholder: 'Add Option',
+				default: {},
+				options: [
+					{
+						displayName: 'Fields',
+						name: 'fields',
+						placeholder: 'Add Field',
+						type: 'fixedCollection',
+						typeOptions: {
+							multipleValues: true,
+						},
+						displayOptions: {
+							show: {
+								'/httpRequestMethod': [
+									'GET',
+								],
+							},
+						},
+						description: 'The list of fields to request in the GET request.',
+						default: {},
+						options: [
+							{
+								name: 'field',
+								displayName: 'Field',
+								values: [
+									{
+										displayName: 'Name',
+										name: 'name',
+										type: 'string',
+										default: '',
+										description: 'Name of the field.',
+									},
+								],
+							},
+						],
+					},
+					{
+						displayName: 'Query Parameters',
+						name: 'queryParameters',
+						placeholder: 'Add Parameter',
+						type: 'fixedCollection',
+						typeOptions: {
+							multipleValues: true,
+						},
+						description: 'The query parameters to send',
+						default: {},
+						options: [
+							{
+								name: 'parameter',
+								displayName: 'Parameter',
+								values: [
+									{
+										displayName: 'Name',
+										name: 'name',
+										type: 'string',
+										default: '',
+										description: 'Name of the parameter.',
+									},
+									{
+										displayName: 'Value',
+										name: 'value',
+										type: 'string',
+										default: '',
+										description: 'Value of the parameter.',
+									},
+								],
+							},
+						],
+					},
+					{
+						displayName: 'Query Parameters JSON',
+						name: 'queryParametersJson',
+						type: 'json',
+						default: '{}',
+						placeholder: '{\"field_name\": \"field_value\"}',
+						description: 'The query parameters to send, defined as a JSON object',
+						required: false,
+					}
+				],
+			},
+		],
+	};
+
+
+	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
+		const items = this.getInputData();
+
+		let response: any; // tslint:disable-line:no-any
+		const successItems: INodeExecutionData[] = [];
+		const failureItems: INodeExecutionData[] = [];
+
+		for (let itemIndex = 0; itemIndex < items.length; itemIndex++) {
+			const graphApiCredentials = this.getCredentials('graphApi');
+
+			const hostUrl = this.getNodeParameter('hostUrl', itemIndex) as string;
+			const httpRequestMethod = this.getNodeParameter('httpRequestMethod', itemIndex) as string;
+			const graphApiVersion = this.getNodeParameter('graphApiVersion', itemIndex) as string;
+			const node = this.getNodeParameter('node', itemIndex) as string;
+			const edge = this.getNodeParameter('edge', itemIndex) as string;
+			const options = this.getNodeParameter('options', itemIndex, {}) as IDataObject;
+
+			let uri = `https://${hostUrl}/${graphApiVersion}${node}`;
+			if (edge) {
+				uri = `${uri}/${edge}`;
+			}
+
+			const requestOptions : OptionsWithUri = {
+				headers: {
+					accept: 'application/json,text/*;q=0.99',
+				},
+				method: httpRequestMethod,
+				uri,
+				json: true,
+				gzip: true,
+				qs: {
+					access_token: graphApiCredentials!.accessToken,
+				},
+			};
+
+			if (options !== undefined) {
+				// Build fields query parameter as a comma separated list
+				if (options.fields !== undefined) {
+					const fields = options.fields as IDataObject;
+					if (fields.field !== undefined) {
+						const fieldsCsv = (fields.field as IDataObject[]).map(field => field.name).join(',');
+						requestOptions.qs.fields = fieldsCsv;
+					}
+				}
+
+				// Add the query parameters defined in the UI
+				if (options.queryParameters !== undefined) {
+					const queryParameters = options.queryParameters as IDataObject;
+
+					if (queryParameters.parameter != undefined) {
+						for (const queryParameter of queryParameters.parameter as IDataObject[]) {
+							requestOptions.qs[queryParameter.name as string] = queryParameter.value;
+						}
+					}
+				}
+
+				// Add the query parameters defined as a JSON object
+				if (options.queryParametersJson) {
+					let queryParametersJsonObj = {};
+					try
+					{
+						queryParametersJsonObj = JSON.parse(options.queryParametersJson as string);
+					} catch { /* Do nothing, at least for now */}
+					const qs = requestOptions.qs;
+					requestOptions.qs = {
+						...qs,
+						...queryParametersJsonObj,
+					};
+				}
+			}
+
+			const sendBinaryData = this.getNodeParameter('sendBinaryData', itemIndex, false) as boolean;
+			if (sendBinaryData) {
+				const item = items[itemIndex];
+				if (item.binary === undefined) {
+					throw new Error('No binary data exists on item!');
+				}
+
+				const binaryPropertyNameFull = this.getNodeParameter('binaryPropertyName', itemIndex) as string;
+
+				let propertyName = 'file';
+				let binaryPropertyName = binaryPropertyNameFull;
+				if (binaryPropertyNameFull.includes(':')) {
+					const binaryPropertyNameParts = binaryPropertyNameFull.split(':');
+					propertyName = binaryPropertyNameParts[0];
+					binaryPropertyName = binaryPropertyNameParts[1];
+				}
+
+				if (item.binary[binaryPropertyName] === undefined) {
+					throw new Error(`No binary data property "${binaryPropertyName}" does not exists on item!`);
+				}
+
+				const binaryProperty = item.binary[binaryPropertyName] as IBinaryData;
+
+				requestOptions.formData = {
+					[propertyName]: {
+						value: Buffer.from(binaryProperty.data, BINARY_ENCODING),
+						options: {
+							filename: binaryProperty.fileName,
+							contentType: binaryProperty.mimeType,
+						},
+					},
+				};
+			}
+
+			try {
+				// Now that the options are all set make the actual http request
+				response = await this.helpers.request(requestOptions);
+			} catch (error) {
+				if (this.continueOnFail() === false) {
+					throw error;
+				}
+
+				let errorItem;
+				if (error.response !== undefined) {
+					// Since this is a Graph API node and we already know the request was
+					// not successful, we'll go straight to the error details.
+					const graphApiErrors = error.response.body?.error ?? {};
+
+					errorItem = {
+						statusCode: error.statusCode,
+						...graphApiErrors,
+						headers: error.response.headers,
+					};
+				} else {
+					// Unknown Graph API response, we'll dump everything in the response item
+					errorItem = error;
+				}
+				failureItems.push({ json: { ...errorItem }});
+
+				continue;
+			}
+
+			if (typeof response === 'string') {
+				if (this.continueOnFail() === false) {
+					throw new Error('Response body is not valid JSON.');
+				}
+
+				failureItems.push({json: {message: response}});
+				continue;
+			}
+
+			successItems.push({json: response});
+		}
+
+		return [successItems, failureItems];
+	}
+}

packages/nodes-base/package.json

@@ -54,6 +54,7 @@
             "dist/credentials/GithubApi.credentials.js",
             "dist/credentials/GitlabApi.credentials.js",
             "dist/credentials/GoogleApi.credentials.js",
+            "dist/credentials/GraphApi.credentials.js",
             "dist/credentials/GumroadApi.credentials.js",
             "dist/credentials/HarvestApi.credentials.js",
             "dist/credentials/HttpBasicAuth.credentials.js",
@@ -165,6 +166,7 @@
             "dist/nodes/Gitlab/GitlabTrigger.node.js",
             "dist/nodes/Google/GoogleDrive.node.js",
             "dist/nodes/Google/GoogleSheets.node.js",
+            "dist/nodes/Facebook/GraphApi.node.js",
             "dist/nodes/GraphQL/GraphQL.node.js",
             "dist/nodes/Gumroad/GumroadTrigger.node.js",
             "dist/nodes/Harvest/Harvest.node.js",