mirror of
https://github.com/n8n-io/n8n.git
synced 2024-12-25 04:34:06 -08:00
850 lines
22 KiB
TypeScript
850 lines
22 KiB
TypeScript
import type {
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IExecuteFunctions,
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GenericValue,
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ICredentialDataDecryptedObject,
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ICredentialsDecrypted,
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ICredentialTestFunctions,
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IDataObject,
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INodeCredentialTestResult,
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INodeExecutionData,
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INodeType,
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INodeTypeDescription,
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} from 'n8n-workflow';
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import { NodeOperationError } from 'n8n-workflow';
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import set from 'lodash/set';
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import redis from 'redis';
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import util from 'util';
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export class Redis implements INodeType {
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description: INodeTypeDescription = {
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displayName: 'Redis',
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name: 'redis',
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icon: 'file:redis.svg',
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group: ['input'],
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version: 1,
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description: 'Get, send and update data in Redis',
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defaults: {
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name: 'Redis',
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},
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inputs: ['main'],
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outputs: ['main'],
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credentials: [
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{
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name: 'redis',
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required: true,
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testedBy: 'redisConnectionTest',
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},
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],
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properties: [
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{
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displayName: 'Operation',
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name: 'operation',
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type: 'options',
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noDataExpression: true,
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options: [
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{
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name: 'Delete',
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value: 'delete',
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description: 'Delete a key from Redis',
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action: 'Delete a key from Redis',
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},
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{
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name: 'Get',
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value: 'get',
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description: 'Get the value of a key from Redis',
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action: 'Get the value of a key from Redis',
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},
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{
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name: 'Increment',
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value: 'incr',
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description: 'Atomically increments a key by 1. Creates the key if it does not exist.',
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action: 'Atomically increment a key by 1. Creates the key if it does not exist.',
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},
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{
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name: 'Info',
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value: 'info',
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description: 'Returns generic information about the Redis instance',
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action: 'Return generic information about the Redis instance',
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},
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{
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name: 'Keys',
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value: 'keys',
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description: 'Returns all the keys matching a pattern',
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action: 'Return all keys matching a pattern',
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},
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{
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name: 'Pop',
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value: 'pop',
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description: 'Pop data from a redis list',
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action: 'Pop data from a redis list',
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},
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{
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name: 'Publish',
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value: 'publish',
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description: 'Publish message to redis channel',
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action: 'Publish message to redis channel',
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},
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{
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name: 'Push',
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value: 'push',
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description: 'Push data to a redis list',
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action: 'Push data to a redis list',
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},
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{
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name: 'Set',
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value: 'set',
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description: 'Set the value of a key in redis',
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action: 'Set the value of a key in redis',
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},
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],
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default: 'info',
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},
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// ----------------------------------
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// get
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// ----------------------------------
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{
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displayName: 'Name',
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name: 'propertyName',
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type: 'string',
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displayOptions: {
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show: {
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operation: ['get'],
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},
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},
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default: 'propertyName',
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required: true,
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description:
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'Name of the property to write received data to. Supports dot-notation. Example: "data.person[0].name".',
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},
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{
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displayName: 'Key',
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name: 'key',
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type: 'string',
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displayOptions: {
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show: {
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operation: ['delete'],
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},
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},
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default: '',
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required: true,
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description: 'Name of the key to delete from Redis',
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},
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{
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displayName: 'Key',
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name: 'key',
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type: 'string',
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displayOptions: {
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show: {
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operation: ['get'],
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},
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},
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default: '',
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required: true,
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description: 'Name of the key to get from Redis',
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},
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{
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displayName: 'Key Type',
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name: 'keyType',
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type: 'options',
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displayOptions: {
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show: {
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operation: ['get'],
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},
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},
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options: [
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{
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name: 'Automatic',
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value: 'automatic',
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description: 'Requests the type before requesting the data (slower)',
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},
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{
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name: 'Hash',
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value: 'hash',
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description: "Data in key is of type 'hash'",
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},
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{
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name: 'List',
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value: 'list',
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description: "Data in key is of type 'lists'",
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},
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{
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name: 'Sets',
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value: 'sets',
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description: "Data in key is of type 'sets'",
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},
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{
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name: 'String',
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value: 'string',
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description: "Data in key is of type 'string'",
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},
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],
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default: 'automatic',
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description: 'The type of the key to get',
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},
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{
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displayName: 'Options',
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name: 'options',
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type: 'collection',
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displayOptions: {
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show: {
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operation: ['get'],
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},
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},
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placeholder: 'Add Option',
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default: {},
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options: [
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{
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displayName: 'Dot Notation',
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name: 'dotNotation',
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type: 'boolean',
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default: true,
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// eslint-disable-next-line n8n-nodes-base/node-param-description-boolean-without-whether
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description:
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'<p>By default, dot-notation is used in property names. This means that "a.b" will set the property "b" underneath "a" so { "a": { "b": value} }.<p></p>If that is not intended this can be deactivated, it will then set { "a.b": value } instead.</p>.',
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},
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],
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},
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// ----------------------------------
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// incr
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// ----------------------------------
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{
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displayName: 'Key',
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name: 'key',
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type: 'string',
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displayOptions: {
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show: {
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operation: ['incr'],
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},
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},
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default: '',
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required: true,
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description: 'Name of the key to increment',
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},
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{
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displayName: 'Expire',
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name: 'expire',
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type: 'boolean',
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displayOptions: {
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show: {
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operation: ['incr'],
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},
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},
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default: false,
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description: 'Whether to set a timeout on key',
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},
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{
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displayName: 'TTL',
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name: 'ttl',
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type: 'number',
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typeOptions: {
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minValue: 1,
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},
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displayOptions: {
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show: {
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operation: ['incr'],
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expire: [true],
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},
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},
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default: 60,
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description: 'Number of seconds before key expiration',
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},
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// ----------------------------------
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// keys
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// ----------------------------------
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{
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displayName: 'Key Pattern',
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name: 'keyPattern',
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type: 'string',
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displayOptions: {
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show: {
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operation: ['keys'],
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},
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},
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default: '',
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required: true,
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description: 'The key pattern for the keys to return',
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},
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{
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displayName: 'Get Values',
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name: 'getValues',
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type: 'boolean',
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displayOptions: {
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show: {
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operation: ['keys'],
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},
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},
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default: true,
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description: 'Whether to get the value of matching keys',
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},
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// ----------------------------------
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// set
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// ----------------------------------
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{
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displayName: 'Key',
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name: 'key',
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type: 'string',
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displayOptions: {
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show: {
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operation: ['set'],
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},
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},
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default: '',
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required: true,
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description: 'Name of the key to set in Redis',
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},
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{
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displayName: 'Value',
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name: 'value',
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type: 'string',
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displayOptions: {
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show: {
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operation: ['set'],
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},
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},
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default: '',
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description: 'The value to write in Redis',
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},
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{
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displayName: 'Key Type',
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name: 'keyType',
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type: 'options',
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displayOptions: {
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show: {
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operation: ['set'],
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},
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},
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options: [
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{
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name: 'Automatic',
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value: 'automatic',
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description: 'Tries to figure out the type automatically depending on the data',
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},
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{
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name: 'Hash',
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value: 'hash',
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description: "Data in key is of type 'hash'",
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},
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{
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name: 'List',
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value: 'list',
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description: "Data in key is of type 'lists'",
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},
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{
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name: 'Sets',
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value: 'sets',
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description: "Data in key is of type 'sets'",
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},
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{
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name: 'String',
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value: 'string',
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description: "Data in key is of type 'string'",
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},
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],
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default: 'automatic',
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description: 'The type of the key to set',
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},
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{
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displayName: 'Value Is JSON',
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name: 'valueIsJSON',
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type: 'boolean',
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displayOptions: {
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show: {
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keyType: ['hash'],
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},
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},
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default: true,
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description: 'Whether the value is JSON or key value pairs',
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},
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{
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displayName: 'Expire',
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name: 'expire',
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type: 'boolean',
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displayOptions: {
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show: {
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operation: ['set'],
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},
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},
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default: false,
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description: 'Whether to set a timeout on key',
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},
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{
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displayName: 'TTL',
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name: 'ttl',
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type: 'number',
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typeOptions: {
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minValue: 1,
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},
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displayOptions: {
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show: {
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operation: ['set'],
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expire: [true],
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},
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},
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default: 60,
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description: 'Number of seconds before key expiration',
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},
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// ----------------------------------
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// publish
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// ----------------------------------
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{
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displayName: 'Channel',
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name: 'channel',
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type: 'string',
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displayOptions: {
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show: {
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operation: ['publish'],
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},
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},
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default: '',
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required: true,
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description: 'Channel name',
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},
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{
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displayName: 'Data',
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name: 'messageData',
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type: 'string',
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displayOptions: {
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show: {
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operation: ['publish'],
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},
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},
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default: '',
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required: true,
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description: 'Data to publish',
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},
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// ----------------------------------
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// push/pop
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// ----------------------------------
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{
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displayName: 'List',
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name: 'list',
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type: 'string',
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displayOptions: {
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show: {
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operation: ['push', 'pop'],
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},
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},
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default: '',
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required: true,
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description: 'Name of the list in Redis',
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},
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{
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displayName: 'Data',
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name: 'messageData',
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type: 'string',
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displayOptions: {
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show: {
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operation: ['push'],
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},
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},
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default: '',
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required: true,
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description: 'Data to push',
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},
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{
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displayName: 'Tail',
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name: 'tail',
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type: 'boolean',
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displayOptions: {
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show: {
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operation: ['push', 'pop'],
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},
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},
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default: false,
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description: 'Whether to push or pop data from the end of the list',
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},
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{
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displayName: 'Name',
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name: 'propertyName',
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type: 'string',
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displayOptions: {
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show: {
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operation: ['pop'],
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},
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},
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default: 'propertyName',
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description:
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'Optional name of the property to write received data to. Supports dot-notation. Example: "data.person[0].name".',
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},
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{
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displayName: 'Options',
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name: 'options',
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type: 'collection',
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displayOptions: {
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show: {
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operation: ['pop'],
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},
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},
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placeholder: 'Add Option',
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default: {},
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options: [
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{
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displayName: 'Dot Notation',
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name: 'dotNotation',
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type: 'boolean',
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default: true,
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// eslint-disable-next-line n8n-nodes-base/node-param-description-boolean-without-whether
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description:
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'<p>By default, dot-notation is used in property names. This means that "a.b" will set the property "b" underneath "a" so { "a": { "b": value} }.<p></p>If that is not intended this can be deactivated, it will then set { "a.b": value } instead.</p>.',
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},
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],
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},
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],
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};
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methods = {
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credentialTest: {
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async redisConnectionTest(
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this: ICredentialTestFunctions,
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credential: ICredentialsDecrypted,
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): Promise<INodeCredentialTestResult> {
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const credentials = credential.data as ICredentialDataDecryptedObject;
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const redisOptions: redis.ClientOpts = {
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host: credentials.host as string,
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port: credentials.port as number,
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db: credentials.database as number,
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};
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if (credentials.password) {
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redisOptions.password = credentials.password as string;
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}
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try {
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const client = redis.createClient(redisOptions);
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await new Promise((resolve, reject): any => {
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client.on('connect', async () => {
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client.ping('ping', (error, pong) => {
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if (error) reject(error);
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resolve(pong);
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client.quit();
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});
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});
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client.on('error', async (err) => {
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client.quit();
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reject(err);
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});
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});
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} catch (error) {
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return {
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status: 'Error',
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message: error.message,
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};
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}
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return {
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status: 'OK',
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message: 'Connection successful!',
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};
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},
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},
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};
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async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
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// Parses the given value in a number if it is one else returns a string
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function getParsedValue(value: string): string | number {
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if (value.match(/^[\d\.]+$/) === null) {
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// Is a string
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return value;
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} else {
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// Is a number
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return parseFloat(value);
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}
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}
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// Converts the Redis Info String into an object
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function convertInfoToObject(stringData: string): IDataObject {
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const returnData: IDataObject = {};
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let key: string, value: string;
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for (const line of stringData.split('\n')) {
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if (['#', ''].includes(line.charAt(0))) {
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continue;
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}
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[key, value] = line.split(':');
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if (key === undefined || value === undefined) {
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continue;
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}
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value = value.trim();
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if (value.includes('=')) {
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returnData[key] = {};
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let key2: string, value2: string;
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for (const keyValuePair of value.split(',')) {
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[key2, value2] = keyValuePair.split('=');
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(returnData[key] as IDataObject)[key2] = getParsedValue(value2);
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}
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} else {
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returnData[key] = getParsedValue(value);
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}
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}
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return returnData;
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}
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async function getValue(client: redis.RedisClient, keyName: string, type?: string) {
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if (type === undefined || type === 'automatic') {
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// Request the type first
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const clientType = util.promisify(client.type).bind(client);
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type = await clientType(keyName);
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}
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if (type === 'string') {
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const clientGet = util.promisify(client.get).bind(client);
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return clientGet(keyName);
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} else if (type === 'hash') {
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const clientHGetAll = util.promisify(client.hgetall).bind(client);
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return clientHGetAll(keyName);
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} else if (type === 'list') {
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const clientLRange = util.promisify(client.lrange).bind(client);
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return clientLRange(keyName, 0, -1);
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} else if (type === 'sets') {
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const clientSMembers = util.promisify(client.smembers).bind(client);
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return clientSMembers(keyName);
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}
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}
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const setValue = async (
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client: redis.RedisClient,
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keyName: string,
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value: string | number | object | string[] | number[],
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expire: boolean,
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ttl: number,
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|
type?: string,
|
|
valueIsJSON?: boolean,
|
|
) => {
|
|
if (type === undefined || type === 'automatic') {
|
|
// Request the type first
|
|
if (typeof value === 'string') {
|
|
type = 'string';
|
|
} else if (Array.isArray(value)) {
|
|
type = 'list';
|
|
} else if (typeof value === 'object') {
|
|
type = 'hash';
|
|
} else {
|
|
throw new NodeOperationError(
|
|
this.getNode(),
|
|
'Could not identify the type to set. Please set it manually!',
|
|
);
|
|
}
|
|
}
|
|
|
|
if (type === 'string') {
|
|
const clientSet = util.promisify(client.set).bind(client);
|
|
await clientSet(keyName, value.toString());
|
|
} else if (type === 'hash') {
|
|
const clientHset = util.promisify(client.hset).bind(client);
|
|
if (valueIsJSON) {
|
|
let values: unknown;
|
|
if (typeof value === 'string') {
|
|
try {
|
|
values = JSON.parse(value);
|
|
} catch {
|
|
// This is how we originally worked and prevents a breaking change
|
|
values = value;
|
|
}
|
|
} else {
|
|
values = value;
|
|
}
|
|
for (const key of Object.keys(values as object)) {
|
|
// @ts-ignore
|
|
await clientHset(keyName, key, (values as IDataObject)[key]!.toString());
|
|
}
|
|
} else {
|
|
const values = value.toString().split(' ');
|
|
//@ts-ignore
|
|
await clientHset(keyName, values);
|
|
}
|
|
} else if (type === 'list') {
|
|
const clientLset = util.promisify(client.lset).bind(client);
|
|
for (let index = 0; index < (value as string[]).length; index++) {
|
|
await clientLset(keyName, index, (value as IDataObject)[index]!.toString());
|
|
}
|
|
}
|
|
|
|
if (expire) {
|
|
const clientExpire = util.promisify(client.expire).bind(client);
|
|
await clientExpire(keyName, ttl);
|
|
}
|
|
return;
|
|
};
|
|
|
|
return new Promise(async (resolve, reject) => {
|
|
// TODO: For array and object fields it should not have a "value" field it should
|
|
// have a parameter field for a path. Because it is not possible to set
|
|
// array, object via parameter directly (should maybe be possible?!?!)
|
|
// Should maybe have a parameter which is JSON.
|
|
const credentials = await this.getCredentials('redis');
|
|
|
|
const redisOptions: redis.ClientOpts = {
|
|
host: credentials.host as string,
|
|
port: credentials.port as number,
|
|
db: credentials.database as number,
|
|
};
|
|
|
|
if (credentials.password) {
|
|
redisOptions.password = credentials.password as string;
|
|
}
|
|
|
|
const client = redis.createClient(redisOptions);
|
|
|
|
const operation = this.getNodeParameter('operation', 0);
|
|
|
|
client.on('error', (err: Error) => {
|
|
client.quit();
|
|
reject(err);
|
|
});
|
|
|
|
client.on('ready', async (_err: Error | null) => {
|
|
client.select(credentials.database as number);
|
|
try {
|
|
if (operation === 'info') {
|
|
const clientInfo = util.promisify(client.info).bind(client);
|
|
const result = await clientInfo();
|
|
|
|
resolve(this.prepareOutputData([{ json: convertInfoToObject(result as string) }]));
|
|
client.quit();
|
|
} else if (
|
|
['delete', 'get', 'keys', 'set', 'incr', 'publish', 'push', 'pop'].includes(operation)
|
|
) {
|
|
const items = this.getInputData();
|
|
const returnItems: INodeExecutionData[] = [];
|
|
|
|
let item: INodeExecutionData;
|
|
for (let itemIndex = 0; itemIndex < items.length; itemIndex++) {
|
|
item = { json: {} };
|
|
|
|
if (operation === 'delete') {
|
|
const keyDelete = this.getNodeParameter('key', itemIndex) as string;
|
|
|
|
const clientDel = util.promisify(client.del).bind(client);
|
|
// @ts-ignore
|
|
await clientDel(keyDelete);
|
|
returnItems.push(items[itemIndex]);
|
|
} else if (operation === 'get') {
|
|
const propertyName = this.getNodeParameter('propertyName', itemIndex) as string;
|
|
const keyGet = this.getNodeParameter('key', itemIndex) as string;
|
|
const keyType = this.getNodeParameter('keyType', itemIndex) as string;
|
|
|
|
const value = (await getValue(client, keyGet, keyType)) || null;
|
|
|
|
const options = this.getNodeParameter('options', itemIndex, {});
|
|
|
|
if (options.dotNotation === false) {
|
|
item.json[propertyName] = value;
|
|
} else {
|
|
set(item.json, propertyName, value);
|
|
}
|
|
|
|
returnItems.push(item);
|
|
} else if (operation === 'keys') {
|
|
const keyPattern = this.getNodeParameter('keyPattern', itemIndex) as string;
|
|
const getValues = this.getNodeParameter('getValues', itemIndex, true) as boolean;
|
|
|
|
const clientKeys = util.promisify(client.keys).bind(client);
|
|
const keys = await clientKeys(keyPattern);
|
|
|
|
if (!getValues) {
|
|
returnItems.push({ json: { keys } });
|
|
continue;
|
|
}
|
|
|
|
const promises: {
|
|
[key: string]: GenericValue;
|
|
} = {};
|
|
|
|
for (const keyName of keys) {
|
|
promises[keyName] = await getValue(client, keyName);
|
|
}
|
|
|
|
for (const keyName of keys) {
|
|
// eslint-disable-next-line @typescript-eslint/await-thenable
|
|
item.json[keyName] = await promises[keyName];
|
|
}
|
|
returnItems.push(item);
|
|
} else if (operation === 'set') {
|
|
const keySet = this.getNodeParameter('key', itemIndex) as string;
|
|
const value = this.getNodeParameter('value', itemIndex) as string;
|
|
const keyType = this.getNodeParameter('keyType', itemIndex) as string;
|
|
const valueIsJSON = this.getNodeParameter(
|
|
'valueIsJSON',
|
|
itemIndex,
|
|
true,
|
|
) as boolean;
|
|
const expire = this.getNodeParameter('expire', itemIndex, false) as boolean;
|
|
const ttl = this.getNodeParameter('ttl', itemIndex, -1) as number;
|
|
|
|
await setValue(client, keySet, value, expire, ttl, keyType, valueIsJSON);
|
|
returnItems.push(items[itemIndex]);
|
|
} else if (operation === 'incr') {
|
|
const keyIncr = this.getNodeParameter('key', itemIndex) as string;
|
|
const expire = this.getNodeParameter('expire', itemIndex, false) as boolean;
|
|
const ttl = this.getNodeParameter('ttl', itemIndex, -1) as number;
|
|
const clientIncr = util.promisify(client.incr).bind(client);
|
|
// @ts-ignore
|
|
const incrementVal = await clientIncr(keyIncr);
|
|
if (expire && ttl > 0) {
|
|
const clientExpire = util.promisify(client.expire).bind(client);
|
|
await clientExpire(keyIncr, ttl);
|
|
}
|
|
returnItems.push({ json: { [keyIncr]: incrementVal } });
|
|
} else if (operation === 'publish') {
|
|
const channel = this.getNodeParameter('channel', itemIndex) as string;
|
|
const messageData = this.getNodeParameter('messageData', itemIndex) as string;
|
|
const clientPublish = util.promisify(client.publish).bind(client);
|
|
await clientPublish(channel, messageData);
|
|
returnItems.push(items[itemIndex]);
|
|
} else if (operation === 'push') {
|
|
const redisList = this.getNodeParameter('list', itemIndex) as string;
|
|
const messageData = this.getNodeParameter('messageData', itemIndex) as string;
|
|
const tail = this.getNodeParameter('tail', itemIndex, false) as boolean;
|
|
const action = tail ? client.RPUSH : client.LPUSH;
|
|
const clientPush = util.promisify(action).bind(client);
|
|
// @ts-ignore: typescript not understanding generic function signatures
|
|
await clientPush(redisList, messageData);
|
|
returnItems.push(items[itemIndex]);
|
|
} else if (operation === 'pop') {
|
|
const redisList = this.getNodeParameter('list', itemIndex) as string;
|
|
const tail = this.getNodeParameter('tail', itemIndex, false) as boolean;
|
|
const propertyName = this.getNodeParameter(
|
|
'propertyName',
|
|
itemIndex,
|
|
'propertyName',
|
|
) as string;
|
|
|
|
const action = tail ? client.rpop : client.lpop;
|
|
const clientPop = util.promisify(action).bind(client);
|
|
const value = await clientPop(redisList);
|
|
|
|
let outputValue;
|
|
try {
|
|
outputValue = JSON.parse(value);
|
|
} catch {
|
|
outputValue = value;
|
|
}
|
|
const options = this.getNodeParameter('options', itemIndex, {});
|
|
if (options.dotNotation === false) {
|
|
item.json[propertyName] = outputValue;
|
|
} else {
|
|
set(item.json, propertyName, outputValue);
|
|
}
|
|
returnItems.push(item);
|
|
}
|
|
}
|
|
|
|
client.quit();
|
|
resolve(this.prepareOutputData(returnItems));
|
|
}
|
|
} catch (error) {
|
|
reject(error);
|
|
}
|
|
});
|
|
});
|
|
}
|
|
}
|