Merge branch 'master' into extract-postgres-functionality

packages/cli/config/index.ts

@@ -128,6 +128,7 @@ const config = convict({
 
 	credentials: {
 		overwrite: {
+			data: {
 				// Allows to set default values for credentials which
 				// get automatically prefilled and the user does not get
 				// displayed and can not change.
@@ -135,8 +136,15 @@ const config = convict({
 				doc: 'Overwrites for credentials',
 				format: '*',
 				default: '{}',
-			env: 'CREDENTIALS_OVERWRITE'
+				env: 'CREDENTIALS_OVERWRITE_DATA'
-		}
+			},
+			endpoint: {
+				doc: 'Fetch credentials from API',
+				format: String,
+				default: '',
+				env: 'CREDENTIALS_OVERWRITE_ENDPOINT',
+			},
+		},
 	},
 
 	executions: {

packages/cli/src/CredentialsOverwrites.ts

@@ -20,7 +20,7 @@ class CredentialsOverwritesClass {
 			return;
 		}
 
-		const data = await GenericHelpers.getConfigValue('credentials.overwrite') as string;
+		const data = await GenericHelpers.getConfigValue('credentials.overwrite.data') as string;
 
 		try {
 			this.overwriteData = JSON.parse(data);
@@ -30,6 +30,7 @@ class CredentialsOverwritesClass {
 	}
 
 	applyOverwrite(type: string, data: ICredentialDataDecryptedObject) {
+
 		const overwrites = this.get(type);
 
 		if (overwrites === undefined) {

packages/cli/src/Server.ts

@@ -58,6 +58,9 @@ import {
 	WorkflowExecuteAdditionalData,
 	WorkflowRunner,
 	GenericHelpers,
+	CredentialsOverwrites,
+	ICredentialsOverwrite,
+	LoadNodesAndCredentials,
 } from './';
 
 import {
@@ -105,6 +108,7 @@ class App {
 	testWebhooks: TestWebhooks.TestWebhooks;
 	endpointWebhook: string;
 	endpointWebhookTest: string;
+	endpointPresetCredentials: string;
 	externalHooks: IExternalHooksClass;
 	saveDataErrorExecution: string;
 	saveDataSuccessExecution: string;
@@ -119,6 +123,8 @@ class App {
 	sslKey:  string;
 	sslCert: string;
 
+	presetCredentialsLoaded: boolean;
+
 	constructor() {
 		this.app = express();
 
@@ -141,6 +147,9 @@ class App {
 		this.sslCert = config.get('ssl_cert');
 
 		this.externalHooks = ExternalHooks();
+
+		this.presetCredentialsLoaded = false;
+		this.endpointPresetCredentials = config.get('credentials.overwrite.endpoint') as string;
 	}
 
 
@@ -1650,6 +1659,40 @@ class App {
 		});
 
 
+		if (this.endpointPresetCredentials !== '') {
+
+			// POST endpoint to set preset credentials
+			this.app.post(`/${this.endpointPresetCredentials}`, async (req: express.Request, res: express.Response) => {
+
+				if (this.presetCredentialsLoaded === false) {
+
+					const body = req.body as ICredentialsOverwrite;
+
+					if (req.headers['content-type'] !== 'application/json') {
+						ResponseHelper.sendErrorResponse(res, new Error('Body must be a valid JSON, make sure the content-type is application/json'));
+						return;
+					}
+
+					const loadNodesAndCredentials = LoadNodesAndCredentials();
+
+					const credentialsOverwrites = CredentialsOverwrites();
+
+					await credentialsOverwrites.init(body);
+
+					const credentialTypes = CredentialTypes();
+
+					await credentialTypes.init(loadNodesAndCredentials.credentialTypes);
+
+					this.presetCredentialsLoaded = true;
+
+					ResponseHelper.sendSuccessResponse(res, { success: true }, true, 200);
+
+				} else {
+					ResponseHelper.sendErrorResponse(res, new Error('Preset credentials can be set once'));
+				}
+			});
+		}
+
 		// Serve the website
 		const startTime = (new Date()).toUTCString();
 		const editorUiPath = require.resolve('n8n-editor-ui');

packages/core/package.json

@@ -30,7 +30,7 @@
         "@types/express": "^4.16.1",
         "@types/jest": "^24.0.18",
         "@types/lodash.get": "^4.4.6",
-        "@types/mmmagic": "^0.4.29",
+        "@types/mime-types": "^2.1.0",
         "@types/node": "^10.10.1",
         "@types/request-promise-native": "^1.0.15",
         "jest": "^24.9.0",
@@ -43,8 +43,9 @@
         "client-oauth2": "^4.2.5",
         "cron": "^1.7.2",
         "crypto-js": "3.1.9-1",
+        "file-type": "^14.6.2",
         "lodash.get": "^4.4.2",
-        "mmmagic": "^0.5.2",
+        "mime-types": "^2.1.27",
         "n8n-workflow": "~0.33.0",
         "p-cancelable": "^2.0.0",
         "request": "^2.88.2",

packages/core/src/NodeExecuteFunctions.ts

@@ -44,14 +44,9 @@ import * as express from 'express';
 import * as path from 'path';
 import { OptionsWithUrl, OptionsWithUri } from 'request';
 import * as requestPromise from 'request-promise-native';
-
-import { Magic, MAGIC_MIME_TYPE } from 'mmmagic';
-
 import { createHmac } from 'crypto';
-
+import { fromBuffer } from 'file-type';
-
+import { lookup } from 'mime-types';
-const magic = new Magic(MAGIC_MIME_TYPE);
-
 
 
 /**
@@ -66,18 +61,28 @@ const magic = new Magic(MAGIC_MIME_TYPE);
  */
 export async function prepareBinaryData(binaryData: Buffer, filePath?: string, mimeType?: string): Promise<IBinaryData> {
 	if (!mimeType) {
-		// If not mime type is given figure it out
+		// If no mime type is given figure it out
-		mimeType = await new Promise<string>(
+
-			(resolve, reject) => {
+		if (filePath) {
-				magic.detect(binaryData, (err: Error, mimeType: string) => {
+			// Use file path to guess mime type
-					if (err) {
+			const mimeTypeLookup = lookup(filePath);
-						return reject(err);
+			if (mimeTypeLookup) {
+				mimeType = mimeTypeLookup;
+			}
 		}
 
-					return resolve(mimeType);
+		if (!mimeType) {
-				});
+			// Use buffer to guess mime type
+			const fileTypeData = await fromBuffer(binaryData);
+			if (fileTypeData) {
+				mimeType = fileTypeData.mime;
+			}
+		}
+
+		if (!mimeType) {
+			// Fall back to text
+			mimeType = 'text/plain';
 		}
-		);
 	}
 
 	const returnData: IBinaryData = {

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

@@ -0,0 +1,47 @@
+import { ICredentialType, NodePropertyTypes } from 'n8n-workflow';
+
+export class MicrosoftSql implements ICredentialType {
+	name = 'microsoftSql';
+	displayName = 'Microsoft SQL';
+	properties = [
+		{
+			displayName: 'Server',
+			name: 'server',
+			type: 'string' as NodePropertyTypes,
+			default: 'localhost'
+		},
+		{
+			displayName: 'Database',
+			name: 'database',
+			type: 'string' as NodePropertyTypes,
+			default: 'master'
+		},
+		{
+			displayName: 'User',
+			name: 'user',
+			type: 'string' as NodePropertyTypes,
+			default: 'sa'
+		},
+		{
+			displayName: 'Password',
+			name: 'password',
+			type: 'string' as NodePropertyTypes,
+			typeOptions: {
+				password: true
+			},
+			default: ''
+		},
+		{
+			displayName: 'Port',
+			name: 'port',
+			type: 'number' as NodePropertyTypes,
+			default: 1433
+		},
+		{
+			displayName: 'Domain',
+			name: 'domain',
+			type: 'string' as NodePropertyTypes,
+			default: ''
+		}
+	];
+}

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

@@ -0,0 +1,18 @@
+import {
+	ICredentialType,
+	NodePropertyTypes,
+} from 'n8n-workflow';
+
+
+export class PostmarkApi implements ICredentialType {
+	name = 'postmarkApi';
+	displayName = 'Postmark API';
+	properties = [
+		{
+			displayName: 'Server API Token',
+			name: 'serverToken',
+			type: 'string' as NodePropertyTypes,
+			default: '',
+		},
+	];
+}

packages/nodes-base/nodes/Microsoft/Sql/GenericFunctions.ts

@@ -0,0 +1,144 @@
+import { IDataObject, INodeExecutionData } from 'n8n-workflow';
+import { ITables } from './TableInterface';
+
+/**
+ * Returns a copy of the item which only contains the json data and
+ * of that only the defined properties
+ *
+ * @param {INodeExecutionData} item The item to copy
+ * @param {string[]} properties The properties it should include
+ * @returns
+ */
+export function copyInputItem(
+	item: INodeExecutionData,
+	properties: string[],
+): IDataObject {
+	// Prepare the data to insert and copy it to be returned
+	let newItem: IDataObject = {};
+	for (const property of properties) {
+		if (item.json[property] === undefined) {
+			newItem[property] = null;
+		} else {
+			newItem[property] = JSON.parse(JSON.stringify(item.json[property]));
+		}
+	}
+	return newItem;
+}
+
+/**
+ * Creates an ITables with the columns for the operations
+ *
+ * @param {INodeExecutionData[]} items The items to extract the tables/columns for
+ * @param {function} getNodeParam getter for the Node's Parameters
+ * @returns {ITables} {tableName: {colNames: [items]}};
+ */
+export function createTableStruct(
+	getNodeParam: Function,
+	items: INodeExecutionData[],
+	additionalProperties: string[] = [],
+	keyName?: string,
+): ITables {
+	return items.reduce((tables, item, index) => {
+		const table = getNodeParam('table', index) as string;
+		const columnString = getNodeParam('columns', index) as string;
+		const columns = columnString.split(',').map(column => column.trim());
+		const itemCopy = copyInputItem(item, columns.concat(additionalProperties));
+		const keyParam = keyName
+			? (getNodeParam(keyName, index) as string)
+			: undefined;
+		if (tables[table] === undefined) {
+			tables[table] = {};
+		}
+		if (tables[table][columnString] === undefined) {
+			tables[table][columnString] = [];
+		}
+		if (keyName) {
+			itemCopy[keyName] = keyParam;
+		}
+		tables[table][columnString].push(itemCopy);
+		return tables;
+	}, {} as ITables);
+}
+
+/**
+ * Executes a queue of queries on given ITables.
+ *
+ * @param {ITables} tables The ITables to be processed.
+ * @param {function} buildQueryQueue function that builds the queue of promises
+ * @returns {Promise}
+ */
+export function executeQueryQueue(
+	tables: ITables,
+	buildQueryQueue: Function,
+): Promise<any[]> {
+	return Promise.all(
+		Object.keys(tables).map(table => {
+			const columnsResults = Object.keys(tables[table]).map(columnString => {
+				return Promise.all(
+					buildQueryQueue({
+						table: table,
+						columnString: columnString,
+						items: tables[table][columnString],
+					}),
+				);
+			});
+			return Promise.all(columnsResults);
+		}),
+	);
+}
+
+/**
+ * Extracts the values from the item for INSERT
+ *
+ * @param {IDataObject} item The item to extract
+ * @returns {string} (Val1, Val2, ...)
+ */
+export function extractValues(item: IDataObject): string {
+	return `(${Object.values(item as any)
+		.map(val => (typeof val === 'string' ? `'${val}'` : val)) // maybe other types such as dates have to be handled as well
+		.join(',')})`;
+}
+
+/**
+ * Extracts the SET from the item for UPDATE
+ *
+ * @param {IDataObject} item The item to extract from
+ * @param {string[]} columns The columns to update
+ * @returns {string} col1 = val1, col2 = val2
+ */
+export function extractUpdateSet(item: IDataObject, columns: string[]): string {
+	return columns
+		.map(
+			column =>
+				`${column} = ${
+					typeof item[column] === 'string' ? `'${item[column]}'` : item[column]
+				}`,
+		)
+		.join(',');
+}
+
+/**
+ * Extracts the WHERE condition from the item for UPDATE
+ *
+ * @param {IDataObject} item The item to extract from
+ * @param {string} key The column name to build the condition with
+ * @returns {string} id = '123'
+ */
+export function extractUpdateCondition(item: IDataObject, key: string): string {
+	return `${key} = ${
+		typeof item[key] === 'string' ? `'${item[key]}'` : item[key]
+	}`;
+}
+
+/**
+ * Extracts the WHERE condition from the items for DELETE
+ *
+ * @param {IDataObject[]} items The items to extract the values from
+ * @param {string} key The column name to extract the value from for the delete condition
+ * @returns {string} (Val1, Val2, ...)
+ */
+export function extractDeleteValues(items: IDataObject[], key: string): string {
+	return `(${items
+		.map(item => (typeof item[key] === 'string' ? `'${item[key]}'` : item[key]))
+		.join(',')})`;
+}

packages/nodes-base/nodes/Microsoft/Sql/MicrosoftSql.node.ts

@@ -0,0 +1,410 @@
+import { IExecuteFunctions } from 'n8n-core';
+import {
+	IDataObject,
+	INodeExecutionData,
+	INodeType,
+	INodeTypeDescription,
+} from 'n8n-workflow';
+
+import { chunk, flatten } from '../../utils/utilities';
+
+import * as mssql from 'mssql';
+
+import { ITables } from './TableInterface';
+
+import {
+	copyInputItem,
+	createTableStruct,
+	executeQueryQueue,
+	extractDeleteValues,
+	extractUpdateCondition,
+	extractUpdateSet,
+	extractValues,
+} from './GenericFunctions';
+
+export class MicrosoftSql implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'Microsoft SQL',
+		name: 'microsoftSql',
+		icon: 'file:mssql.png',
+		group: ['input'],
+		version: 1,
+		description: 'Gets, add and update data in Microsoft SQL.',
+		defaults: {
+			name: 'Microsoft SQL',
+			color: '#1d4bab',
+		},
+		inputs: ['main'],
+		outputs: ['main'],
+		credentials: [
+			{
+				name: 'microsoftSql',
+				required: true,
+			},
+		],
+		properties: [
+			{
+				displayName: 'Operation',
+				name: 'operation',
+				type: 'options',
+				options: [
+					{
+						name: 'Execute Query',
+						value: 'executeQuery',
+						description: 'Executes a SQL query.',
+					},
+					{
+						name: 'Insert',
+						value: 'insert',
+						description: 'Insert rows in database.',
+					},
+					{
+						name: 'Update',
+						value: 'update',
+						description: 'Updates rows in database.',
+					},
+					{
+						name: 'Delete',
+						value: 'delete',
+						description: 'Deletes rows in database.',
+					},
+				],
+				default: 'insert',
+				description: 'The operation to perform.',
+			},
+
+			// ----------------------------------
+			//         executeQuery
+			// ----------------------------------
+			{
+				displayName: 'Query',
+				name: 'query',
+				type: 'string',
+				typeOptions: {
+					rows: 5,
+				},
+				displayOptions: {
+					show: {
+						operation: ['executeQuery'],
+					},
+				},
+				default: '',
+				placeholder: 'SELECT id, name FROM product WHERE id < 40',
+				required: true,
+				description: 'The SQL query to execute.',
+			},
+
+			// ----------------------------------
+			//         insert
+			// ----------------------------------
+			{
+				displayName: 'Table',
+				name: 'table',
+				type: 'string',
+				displayOptions: {
+					show: {
+						operation: ['insert'],
+					},
+				},
+				default: '',
+				required: true,
+				description: 'Name of the table in which to insert data to.',
+			},
+			{
+				displayName: 'Columns',
+				name: 'columns',
+				type: 'string',
+				displayOptions: {
+					show: {
+						operation: ['insert'],
+					},
+				},
+				default: '',
+				placeholder: 'id,name,description',
+				description:
+					'Comma separated list of the properties which should used as columns for the new rows.',
+			},
+
+			// ----------------------------------
+			//         update
+			// ----------------------------------
+			{
+				displayName: 'Table',
+				name: 'table',
+				type: 'string',
+				displayOptions: {
+					show: {
+						operation: ['update'],
+					},
+				},
+				default: '',
+				required: true,
+				description: 'Name of the table in which to update data in',
+			},
+			{
+				displayName: 'Update Key',
+				name: 'updateKey',
+				type: 'string',
+				displayOptions: {
+					show: {
+						operation: ['update'],
+					},
+				},
+				default: 'id',
+				required: true,
+				description:
+					'Name of the property which decides which rows in the database should be updated. Normally that would be "id".',
+			},
+			{
+				displayName: 'Columns',
+				name: 'columns',
+				type: 'string',
+				displayOptions: {
+					show: {
+						operation: ['update'],
+					},
+				},
+				default: '',
+				placeholder: 'name,description',
+				description:
+					'Comma separated list of the properties which should used as columns for rows to update.',
+			},
+
+			// ----------------------------------
+			//         delete
+			// ----------------------------------
+			{
+				displayName: 'Table',
+				name: 'table',
+				type: 'string',
+				displayOptions: {
+					show: {
+						operation: ['delete'],
+					},
+				},
+				default: '',
+				required: true,
+				description: 'Name of the table in which to delete data.',
+			},
+			{
+				displayName: 'Delete Key',
+				name: 'deleteKey',
+				type: 'string',
+				displayOptions: {
+					show: {
+						operation: ['delete'],
+					},
+				},
+				default: 'id',
+				required: true,
+				description:
+					'Name of the property which decides which rows in the database should be deleted. Normally that would be "id".',
+			},
+		],
+	};
+
+	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
+		const credentials = this.getCredentials('microsoftSql');
+
+		if (credentials === undefined) {
+			throw new Error('No credentials got returned!');
+		}
+
+		const config = {
+			server: credentials.server as string,
+			port: credentials.port as number,
+			database: credentials.database as string,
+			user: credentials.user as string,
+			password: credentials.password as string,
+			domain: credentials.domain ? (credentials.domain as string) : undefined,
+		};
+
+		const pool = new mssql.ConnectionPool(config);
+		await pool.connect();
+
+		let returnItems: INodeExecutionData[] = [];
+
+		const items = this.getInputData();
+		const operation = this.getNodeParameter('operation', 0) as string;
+
+		try {
+			if (operation === 'executeQuery') {
+				// ----------------------------------
+				//         executeQuery
+				// ----------------------------------
+
+				const rawQuery = this.getNodeParameter('query', 0) as string;
+
+				const queryResult = await pool.request().query(rawQuery);
+
+				const result =
+					queryResult.recordsets.length > 1
+						? flatten(queryResult.recordsets)
+						: queryResult.recordsets[0];
+
+				returnItems = this.helpers.returnJsonArray(result as IDataObject[]);
+			} else if (operation === 'insert') {
+				// ----------------------------------
+				//         insert
+				// ----------------------------------
+
+				const tables = createTableStruct(this.getNodeParameter, items);
+				const queriesResults = await executeQueryQueue(
+					tables,
+					({
+						table,
+						columnString,
+						items,
+					}: {
+						table: string;
+						columnString: string;
+						items: IDataObject[];
+					}): Array<Promise<object>> => {
+						return chunk(items, 1000).map(insertValues => {
+							const values = insertValues
+								.map((item: IDataObject) => extractValues(item))
+								.join(',');
+
+							return pool
+								.request()
+								.query(
+									`INSERT INTO ${table}(${columnString}) VALUES ${values};`,
+								);
+						});
+					},
+				);
+
+				const rowsAffected = flatten(queriesResults).reduce(
+					(acc: number, resp: mssql.IResult<object>): number =>
+						(acc += resp.rowsAffected.reduce((sum, val) => (sum += val))),
+					0,
+				);
+
+				returnItems = this.helpers.returnJsonArray({
+					rowsAffected,
+				} as IDataObject);
+			} else if (operation === 'update') {
+				// ----------------------------------
+				//         update
+				// ----------------------------------
+
+				const updateKeys = items.map(
+					(item, index) => this.getNodeParameter('updateKey', index) as string,
+				);
+				const tables = createTableStruct(
+					this.getNodeParameter,
+					items,
+					['updateKey'],
+					'updateKey',
+				);
+				const queriesResults = await executeQueryQueue(
+					tables,
+					({
+						table,
+						columnString,
+						items,
+					}: {
+						table: string;
+						columnString: string;
+						items: IDataObject[];
+					}): Array<Promise<object>> => {
+						return items.map(item => {
+							const columns = columnString
+								.split(',')
+								.map(column => column.trim());
+
+							const setValues = extractUpdateSet(item, columns);
+							const condition = extractUpdateCondition(
+								item,
+								item.updateKey as string,
+							);
+
+							return pool
+								.request()
+								.query(`UPDATE ${table} SET ${setValues} WHERE ${condition};`);
+						});
+					},
+				);
+
+				const rowsAffected = flatten(queriesResults).reduce(
+					(acc: number, resp: mssql.IResult<object>): number =>
+						(acc += resp.rowsAffected.reduce((sum, val) => (sum += val))),
+					0,
+				);
+
+				returnItems = this.helpers.returnJsonArray({
+					rowsAffected,
+				} as IDataObject);
+			} else if (operation === 'delete') {
+				// ----------------------------------
+				//         delete
+				// ----------------------------------
+
+				const tables = items.reduce((tables, item, index) => {
+					const table = this.getNodeParameter('table', index) as string;
+					const deleteKey = this.getNodeParameter('deleteKey', index) as string;
+					if (tables[table] === undefined) {
+						tables[table] = {};
+					}
+					if (tables[table][deleteKey] === undefined) {
+						tables[table][deleteKey] = [];
+					}
+					tables[table][deleteKey].push(item);
+					return tables;
+				}, {} as ITables);
+
+				const queriesResults = await Promise.all(
+					Object.keys(tables).map(table => {
+						const deleteKeyResults = Object.keys(tables[table]).map(
+							deleteKey => {
+								const deleteItemsList = chunk(
+									tables[table][deleteKey].map(item =>
+										copyInputItem(item as INodeExecutionData, [deleteKey]),
+									),
+									1000,
+								);
+								const queryQueue = deleteItemsList.map(deleteValues => {
+									return pool
+										.request()
+										.query(
+											`DELETE FROM ${table} WHERE ${deleteKey} IN ${extractDeleteValues(
+												deleteValues,
+												deleteKey,
+											)};`,
+										);
+								});
+								return Promise.all(queryQueue);
+							},
+						);
+						return Promise.all(deleteKeyResults);
+					}),
+				);
+
+				const rowsAffected = flatten(queriesResults).reduce(
+					(acc: number, resp: mssql.IResult<object>): number =>
+						(acc += resp.rowsAffected.reduce((sum, val) => (sum += val))),
+					0,
+				);
+
+				returnItems = this.helpers.returnJsonArray({
+					rowsAffected,
+				} as IDataObject);
+			} else {
+				await pool.close();
+				throw new Error(`The operation "${operation}" is not supported!`);
+			}
+		} catch (err) {
+			if (this.continueOnFail() === true) {
+				returnItems = items;
+			} else {
+				await pool.close();
+				throw err;
+			}
+		}
+
+		// Close the connection
+		await pool.close();
+
+		return this.prepareOutputData(returnItems);
+	}
+}

packages/nodes-base/nodes/Microsoft/Sql/TableInterface.ts

@@ -0,0 +1,7 @@
+import { IDataObject } from 'n8n-workflow';
+
+export interface ITables {
+	[key: string]: {
+		[key: string]: Array<IDataObject>;
+	};
+}

packages/nodes-base/nodes/Postmark/GenericFunctions.ts

@@ -0,0 +1,93 @@
+import {
+	OptionsWithUri,
+ } from 'request';
+
+import {
+	IExecuteFunctions,
+	ILoadOptionsFunctions,
+} from 'n8n-core';
+
+import {
+	IDataObject,
+	IHookFunctions,
+	IWebhookFunctions
+} from 'n8n-workflow';
+
+
+export async function postmarkApiRequest(this: IExecuteFunctions | IWebhookFunctions | IHookFunctions | ILoadOptionsFunctions, method : string, endpoint : string, body: any = {}, option: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
+	const credentials = this.getCredentials('postmarkApi');
+
+	if (credentials === undefined) {
+		throw new Error('No credentials got returned!');
+	}
+
+	let options: OptionsWithUri = {
+		headers: {
+			'Content-Type': 'application/json',
+			'Accept': 'application/json',
+			'X-Postmark-Server-Token' : credentials.serverToken
+		},
+		method,
+		body,
+		uri: 'https://api.postmarkapp.com' + endpoint,
+		json: true
+	};
+	if (body === {}) {
+		delete options.body;
+	}
+	options = Object.assign({}, options, option);
+
+	try {
+		return await this.helpers.request!(options);
+	} catch (error) {
+		throw new Error(`Postmark: ${error.statusCode} Message: ${error.message}`);
+	}
+}
+
+// tslint:disable-next-line: no-any
+export function convertTriggerObjectToStringArray (webhookObject : any) : string[] {
+	const triggers = webhookObject.Triggers;
+	const webhookEvents : string[] = [];
+
+	// Translate Webhook trigger settings to string array
+	if (triggers.Open.Enabled) {
+		webhookEvents.push('open');
+	}
+	if (triggers.Open.PostFirstOpenOnly) {
+		webhookEvents.push('firstOpen');
+	}
+	if (triggers.Click.Enabled) {
+		webhookEvents.push('click');
+	}
+	if (triggers.Delivery.Enabled) {
+		webhookEvents.push('delivery');
+	}
+	if (triggers.Bounce.Enabled) {
+		webhookEvents.push('bounce');
+	}
+	if (triggers.Bounce.IncludeContent) {
+		webhookEvents.push('includeContent');
+	}
+	if (triggers.SpamComplaint.Enabled) {
+		webhookEvents.push('spamComplaint');
+	}
+	if (triggers.SpamComplaint.IncludeContent) {
+		if (!webhookEvents.includes('IncludeContent')) {
+			webhookEvents.push('includeContent');
+		}
+	}
+	if (triggers.SubscriptionChange.Enabled) {
+		webhookEvents.push('subscriptionChange');
+	}
+
+	return webhookEvents;
+}
+
+export function eventExists (currentEvents : string[], webhookEvents: string[]) {
+	for (const currentEvent of currentEvents) {
+		if (!webhookEvents.includes(currentEvent)) {
+			return false;
+		}
+	}
+	return true;
+}

packages/nodes-base/nodes/Postmark/PostmarkTrigger.node.ts

@@ -0,0 +1,256 @@
+import {
+	IHookFunctions,
+	IWebhookFunctions,
+} from 'n8n-core';
+
+import {
+	INodeTypeDescription,
+	INodeType,
+	IWebhookResponseData,
+} from 'n8n-workflow';
+
+import {
+	convertTriggerObjectToStringArray,
+	eventExists,
+	postmarkApiRequest
+} from './GenericFunctions';
+
+export class PostmarkTrigger implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'Postmark Trigger',
+		name: 'postmarkTrigger',
+		icon: 'file:postmark.png',
+		group: ['trigger'],
+		version: 1,
+		description: 'Starts the workflow when Postmark events occur.',
+		defaults: {
+			name: 'Postmark Trigger',
+			color: '#fedd00',
+		},
+		inputs: [],
+		outputs: ['main'],
+		credentials: [
+			{
+				name: 'postmarkApi',
+				required: true,
+			},
+		],
+		webhooks: [
+			{
+				name: 'default',
+				httpMethod: 'POST',
+				responseMode: 'onReceived',
+				path: 'webhook',
+			},
+		],
+		properties: [
+			{
+				displayName: 'Events',
+				name: 'events',
+				type: 'multiOptions',
+				options: [
+					{
+						name: 'Bounce',
+						value: 'bounce',
+						description: 'Trigger on bounce.',
+					},
+					{
+						name: 'Click',
+						value: 'click',
+						description: 'Trigger on click.',
+					},
+					{
+						name: 'Delivery',
+						value: 'delivery',
+						description: 'Trigger on delivery.',
+					},
+					{
+						name: 'Open',
+						value: 'open',
+						description: 'Trigger webhook on open.',
+					},
+					{
+						name: 'Spam Complaint',
+						value: 'spamComplaint',
+						description: 'Trigger on spam complaint.',
+					},
+					{
+						name: 'Subscription Change',
+						value: 'subscriptionChange',
+						description: 'Trigger on subscription change.',
+					},
+				],
+				default: [],
+				required: true,
+				description: 'Webhook events that will be enabled for that endpoint.',
+			},
+			{
+				displayName: 'First Open',
+				name: 'firstOpen',
+				description: 'Only fires on first open for event "Open".',
+				type: 'boolean',
+				default: false,
+				displayOptions: {
+					show: {
+						events: [
+							'open',
+						],
+					},
+				},
+			},
+			{
+				displayName: 'Include Content',
+				name: 'includeContent',
+				description: 'Includes message content for events "Bounce" and "Spam Complaint".',
+				type: 'boolean',
+				default: false,
+				displayOptions: {
+					show: {
+						events: [
+							'bounce',
+							'spamComplaint',
+						],
+					},
+				},
+			},
+		],
+
+	};
+
+	// @ts-ignore (because of request)
+	webhookMethods = {
+		default: {
+			async checkExists(this: IHookFunctions): Promise<boolean> {
+				const webhookData = this.getWorkflowStaticData('node');
+				const webhookUrl = this.getNodeWebhookUrl('default');
+				const events = this.getNodeParameter('events') as string[];
+				if (this.getNodeParameter('includeContent') as boolean) {
+					events.push('includeContent');
+				}
+				if (this.getNodeParameter('firstOpen') as boolean) {
+					events.push('firstOpen');
+				}
+
+				// Get all webhooks
+				const endpoint = `/webhooks`;
+
+				const responseData = await postmarkApiRequest.call(this, 'GET', endpoint, {});
+
+				// No webhooks exist
+				if (responseData.Webhooks.length === 0) {
+					return false;
+				}
+
+				// If webhooks exist, check if any match current settings
+				for (const webhook of responseData.Webhooks) {
+					if (webhook.Url === webhookUrl && eventExists(events, convertTriggerObjectToStringArray(webhook))) {
+						webhookData.webhookId = webhook.ID;
+						// webhook identical to current settings. re-assign webhook id to found webhook.
+						return true;
+					}
+				}
+
+				return false;
+			},
+			async create(this: IHookFunctions): Promise<boolean> {
+				const webhookUrl = this.getNodeWebhookUrl('default');
+
+				const endpoint = `/webhooks`;
+
+				// tslint:disable-next-line: no-any
+				const body : any = {
+					Url: webhookUrl,
+					Triggers: {
+						Open:{
+							Enabled: false,
+							PostFirstOpenOnly: false
+						},
+						Click:{
+							Enabled: false
+						},
+						Delivery:{
+							Enabled: false
+						},
+						Bounce:{
+							Enabled: false,
+							IncludeContent: false
+						},
+						SpamComplaint:{
+							Enabled: false,
+							IncludeContent: false
+						},
+						SubscriptionChange: {
+							Enabled: false
+						}
+					}
+				};
+
+				const events = this.getNodeParameter('events') as string[];
+
+				if (events.includes('open')) {
+					body.Triggers.Open.Enabled = true;
+					body.Triggers.Open.PostFirstOpenOnly = this.getNodeParameter('firstOpen') as boolean;
+				}
+				if (events.includes('click')) {
+					body.Triggers.Click.Enabled = true;
+				}
+				if (events.includes('delivery')) {
+					body.Triggers.Delivery.Enabled = true;
+				}
+				if (events.includes('bounce')) {
+					body.Triggers.Bounce.Enabled = true;
+					body.Triggers.Bounce.IncludeContent = this.getNodeParameter('includeContent') as boolean;
+				}
+				if (events.includes('spamComplaint')) {
+					body.Triggers.SpamComplaint.Enabled = true;
+					body.Triggers.SpamComplaint.IncludeContent = this.getNodeParameter('includeContent') as boolean;
+				}
+				if (events.includes('subscriptionChange')) {
+					body.Triggers.SubscriptionChange.Enabled = true;
+				}
+
+				const responseData = await postmarkApiRequest.call(this, 'POST', endpoint, body);
+
+				if (responseData.ID === undefined) {
+					// Required data is missing so was not successful
+					return false;
+				}
+
+				const webhookData = this.getWorkflowStaticData('node');
+				webhookData.webhookId = responseData.ID as string;
+
+				return true;
+			},
+			async delete(this: IHookFunctions): Promise<boolean> {
+				const webhookData = this.getWorkflowStaticData('node');
+
+				if (webhookData.webhookId !== undefined) {
+					const endpoint = `/webhooks/${webhookData.webhookId}`;
+					const body = {};
+
+					try {
+						await postmarkApiRequest.call(this, 'DELETE', endpoint, body);
+					} catch (e) {
+						return false;
+					}
+
+					// Remove from the static workflow data so that it is clear
+					// that no webhooks are registred anymore
+					delete webhookData.webhookId;
+					delete webhookData.webhookEvents;
+				}
+
+				return true;
+			},
+		},
+	};
+
+	async webhook(this: IWebhookFunctions): Promise<IWebhookResponseData> {
+		const req = this.getRequestObject();
+		return {
+			workflowData: [
+				this.helpers.returnJsonArray(req.body)
+			],
+		};
+	}
+}

packages/nodes-base/nodes/utils/utilities.ts

@@ -0,0 +1,57 @@
+/**
+ * Creates an array of elements split into groups the length of `size`.
+ * If `array` can't be split evenly, the final chunk will be the remaining
+ * elements.
+ *
+ * @param {Array} array The array to process.
+ * @param {number} [size=1] The length of each chunk
+ * @returns {Array} Returns the new array of chunks.
+ * @example
+ *
+ * chunk(['a', 'b', 'c', 'd'], 2)
+ * // => [['a', 'b'], ['c', 'd']]
+ *
+ * chunk(['a', 'b', 'c', 'd'], 3)
+ * // => [['a', 'b', 'c'], ['d']]
+ */
+export function chunk(array: any[], size: number = 1) {
+	const length = array == null ? 0 : array.length;
+	if (!length || size < 1) {
+		return [];
+	}
+	let index = 0;
+	let resIndex = 0;
+	const result = new Array(Math.ceil(length / size));
+
+	while (index < length) {
+		result[resIndex++] = array.slice(index, (index += size));
+	}
+	return result;
+}
+
+/**
+ * Takes a multidimensional array and converts it to a one-dimensional array.
+ *
+ * @param {Array} nestedArray The array to be flattened.
+ * @returns {Array} Returns the new flattened array.
+ * @example
+ *
+ * flatten([['a', 'b'], ['c', 'd']])
+ * // => ['a', 'b', 'c', 'd']
+ *
+ */
+export function flatten(nestedArray: any[][]) {
+	const result = [];
+
+	(function loop(array: any[]) {
+		for (var i = 0; i < array.length; i++) {
+			if (Array.isArray(array[i])) {
+				loop(array[i]);
+			} else {
+				result.push(array[i]);
+			}
+		}
+	})(nestedArray);
+
+	return result;
+}

packages/nodes-base/package.json

@@ -96,6 +96,7 @@
       "dist/credentials/MicrosoftExcelOAuth2Api.credentials.js",
       "dist/credentials/MicrosoftOAuth2Api.credentials.js",
       "dist/credentials/MicrosoftOneDriveOAuth2Api.credentials.js",
+      "dist/credentials/MicrosoftSql.credentials.js",
       "dist/credentials/MoceanApi.credentials.js",
       "dist/credentials/MondayComApi.credentials.js",
       "dist/credentials/MongoDb.credentials.js",
@@ -110,6 +111,7 @@
       "dist/credentials/PayPalApi.credentials.js",
       "dist/credentials/PipedriveApi.credentials.js",
       "dist/credentials/Postgres.credentials.js",
+      "dist/credentials/PostmarkApi.credentials.js",
       "dist/credentials/Redis.credentials.js",
       "dist/credentials/RocketchatApi.credentials.js",
       "dist/credentials/RundeckApi.credentials.js",
@@ -240,6 +242,7 @@
       "dist/nodes/MessageBird/MessageBird.node.js",
       "dist/nodes/Microsoft/Excel/MicrosoftExcel.node.js",
       "dist/nodes/Microsoft/OneDrive/MicrosoftOneDrive.node.js",
+      "dist/nodes/Microsoft/Sql/MicrosoftSql.node.js",
       "dist/nodes/MoveBinaryData.node.js",
       "dist/nodes/Mocean/Mocean.node.js",
       "dist/nodes/MondayCom/MondayCom.node.js",
@@ -256,6 +259,7 @@
       "dist/nodes/Pipedrive/Pipedrive.node.js",
       "dist/nodes/Pipedrive/PipedriveTrigger.node.js",
       "dist/nodes/Postgres/Postgres.node.js",
+      "dist/nodes/Postmark/PostmarkTrigger.node.js",
       "dist/nodes/ReadBinaryFile.node.js",
       "dist/nodes/ReadBinaryFiles.node.js",
       "dist/nodes/ReadPdf.node.js",
@@ -320,6 +324,7 @@
     "@types/lodash.set": "^4.3.6",
     "@types/moment-timezone": "^0.5.12",
     "@types/mongodb": "^3.5.4",
+    "@types/mssql": "^6.0.2",
     "@types/node": "^10.10.1",
     "@types/nodemailer": "^6.4.0",
     "@types/redis": "^2.8.11",
@@ -352,6 +357,7 @@
     "moment": "2.24.0",
     "moment-timezone": "^0.5.28",
     "mongodb": "^3.5.5",
+    "mssql": "^6.2.0",
     "mysql2": "^2.0.1",
     "n8n-core": "~0.37.0",
     "nodemailer": "^6.4.6",