feat(node): add mysql node

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

@@ -0,0 +1,28 @@
+import {
+	IDataObject,
+	INodeExecutionData,
+} from 'n8n-workflow';
+
+/**
+ * Returns of copy of the items which only contains the json data and
+ * of that only the define properties
+ *
+ * @param {INodeExecutionData[]} items The items to copy
+ * @param {string[]} properties The properties it should include
+ * @returns
+ */
+export function copyInputItems(items: INodeExecutionData[], properties: string[]): IDataObject[] {
+	// Prepare the data to insert and copy it to be returned
+	let newItem: IDataObject;
+	return items.map((item) => {
+		newItem = {};
+		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;
+	});
+}

packages/nodes-base/nodes/MySQL/MySQL.node.ts

@@ -0,0 +1,250 @@
+import { IExecuteFunctions } from 'n8n-core';
+import {
+	IDataObject,
+	INodeExecutionData,
+	INodeType,
+	INodeTypeDescription,
+} from 'n8n-workflow';
+import * as knex from 'knex';
+
+import { copyInputItems } from './GenericFunctions';
+
+export class MySQL implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'MySQL',
+		name: 'mysql',
+		icon: 'file:mysql.png',
+		group: ['input'],
+		version: 1,
+		description: 'Gets, add and update data in MySQL.',
+		defaults: {
+			name: 'MySQL',
+			color: '#4279a2',
+		},
+		inputs: ['main'],
+		outputs: ['main'],
+		credentials: [
+			{
+				name: 'mysql',
+				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.',
+					},
+				],
+				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.',
+			},
+
+		]
+	};
+
+
+	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
+		const credentials = this.getCredentials('mysql');
+
+		if (credentials === undefined) {
+			throw new Error('No credentials got returned!');
+		}
+
+		const client = knex({ client: 'mysql2', connection: credentials });
+		const items = this.getInputData();
+		const operation = this.getNodeParameter('operation', 0) as string;
+		let returnItems = [];
+
+		if (operation === 'executeQuery') {
+			// ----------------------------------
+			//         executeQuery
+			// ----------------------------------
+
+			const queryQueue = items.map((item, index) => {
+				const rawQuery = this.getNodeParameter('query', index) as string;
+
+				return client.raw(rawQuery);
+			});
+			let queryResult = await Promise.all(queryQueue);
+
+			queryResult = queryResult.reduce((result, current) => {
+				if (Array.isArray(current[0])) {
+					return result.concat(current[0]);
+				}
+
+				result.push(current[0]);
+
+				return result;
+			}, []);
+
+			returnItems = this.helpers.returnJsonArray(queryResult as IDataObject[]);
+
+		} else if (operation === 'insert') {
+			// ----------------------------------
+			//         insert
+			// ----------------------------------
+
+			const table = this.getNodeParameter('table', 0) as string;
+			const columnString = this.getNodeParameter('columns', 0) as string;
+			const columns = columnString.split(',').map(column => column.trim());
+			const insertItems = copyInputItems(items, columns);
+			const insertData = await client.insert(insertItems).into(table);
+
+			returnItems = [{ json: { row_count: insertData[0] }}];
+
+		} else if (operation === 'update') {
+			// ----------------------------------
+			//         update
+			// ----------------------------------
+
+			const table = this.getNodeParameter('table', 0) as string;
+			const updateKey = this.getNodeParameter('updateKey', 0) as string;
+			const columnString = this.getNodeParameter('columns', 0) as string;
+			const columns = columnString.split(',').map(column => column.trim());
+
+			if (!columns.includes(updateKey)) {
+				columns.unshift(updateKey);
+			}
+
+			const updateItems = copyInputItems(items, columns);
+			const queryQueue = updateItems.map((item) => {
+				return client(table)
+					.where(updateKey, '=', item[updateKey])
+					.update(item);
+			});
+
+			await Promise.all(queryQueue);
+
+			returnItems = this.helpers.returnJsonArray(updateItems as IDataObject[]);
+
+		} else {
+			throw new Error(`The operation "${operation}" is not supported!`);
+		}
+
+		return this.prepareOutputData(returnItems);
+	}
+}

packages/nodes-base/package.json

@@ -119,6 +119,7 @@
             "dist/nodes/Merge.node.js",
             "dist/nodes/MoveBinaryData.node.js",
             "dist/nodes/MongoDb/MongoDb.node.js",
+            "dist/nodes/MySQL/MySQL.node.js",
             "dist/nodes/NextCloud/NextCloud.node.js",
             "dist/nodes/NoOp.node.js",
             "dist/nodes/OpenWeatherMap.node.js",
@@ -186,10 +187,12 @@
         "gm": "^1.23.1",
         "googleapis": "^42.0.0",
         "imap-simple": "^4.3.0",
+        "knex": "^0.20.1",
         "lodash.get": "^4.4.2",
         "lodash.set": "^4.3.2",
         "lodash.unset": "^4.5.2",
         "mongodb": "^3.3.2",
+        "mysql2": "^2.0.1",
         "n8n-core": "~0.17.0",
         "nodemailer": "^5.1.1",
         "pdf-parse": "^1.1.1",