import { IExecuteFunctions } from 'n8n-core'; import { GenericValue, ICredentialDataDecryptedObject, ICredentialsDecrypted, ICredentialTestFunctions, IDataObject, INodeCredentialTestResult, INodeExecutionData, INodeType, INodeTypeDescription, NodeOperationError, } from 'n8n-workflow'; import { set } from 'lodash'; import redis from 'redis'; import util from 'util'; export class Redis implements INodeType { description: INodeTypeDescription = { displayName: 'Redis', name: 'redis', icon: 'file:redis.svg', group: ['input'], version: 1, description: 'Get, send and update data in Redis', defaults: { name: 'Redis', }, inputs: ['main'], outputs: ['main'], credentials: [ { name: 'redis', required: true, testedBy: 'redisConnectionTest', }, ], properties: [ { displayName: 'Operation', name: 'operation', type: 'options', noDataExpression: true, options: [ { name: 'Delete', value: 'delete', description: 'Delete a key from Redis', action: 'Delete a key from Redis', }, { name: 'Get', value: 'get', description: 'Get the value of a key from Redis', action: 'Get the value of a key from Redis', }, { name: 'Increment', value: 'incr', description: 'Atomically increments a key by 1. Creates the key if it does not exist.', action: 'Atomically increment a key by 1. Creates the key if it does not exist.', }, { name: 'Info', value: 'info', description: 'Returns generic information about the Redis instance', action: 'Return generic information about the Redis instance', }, { name: 'Keys', value: 'keys', description: 'Returns all the keys matching a pattern', action: 'Return all keys matching a pattern', }, { name: 'Pop', value: 'pop', description: 'Pop data from a redis list', action: 'Pop data from a redis list', }, { name: 'Publish', value: 'publish', description: 'Publish message to redis channel', action: 'Publish message to redis channel', }, { name: 'Push', value: 'push', description: 'Push data to a redis list', action: 'Push data to a redis list', }, { name: 'Set', value: 'set', description: 'Set the value of a key in redis', action: 'Set the value of a key in redis', }, ], default: 'info', }, // ---------------------------------- // get // ---------------------------------- { displayName: 'Name', name: 'propertyName', type: 'string', displayOptions: { show: { operation: ['get'], }, }, default: 'propertyName', required: true, description: 'Name of the property to write received data to. Supports dot-notation. Example: "data.person[0].name".', }, { displayName: 'Key', name: 'key', type: 'string', displayOptions: { show: { operation: ['delete'], }, }, default: '', required: true, description: 'Name of the key to delete from Redis', }, { displayName: 'Key', name: 'key', type: 'string', displayOptions: { show: { operation: ['get'], }, }, default: '', required: true, description: 'Name of the key to get from Redis', }, { displayName: 'Key Type', name: 'keyType', type: 'options', displayOptions: { show: { operation: ['get'], }, }, options: [ { name: 'Automatic', value: 'automatic', description: 'Requests the type before requesting the data (slower)', }, { name: 'Hash', value: 'hash', description: "Data in key is of type 'hash'", }, { name: 'List', value: 'list', description: "Data in key is of type 'lists'", }, { name: 'Sets', value: 'sets', description: "Data in key is of type 'sets'", }, { name: 'String', value: 'string', description: "Data in key is of type 'string'", }, ], default: 'automatic', description: 'The type of the key to get', }, { displayName: 'Options', name: 'options', type: 'collection', displayOptions: { show: { operation: ['get'], }, }, placeholder: 'Add Option', default: {}, options: [ { displayName: 'Dot Notation', name: 'dotNotation', type: 'boolean', default: true, // eslint-disable-next-line n8n-nodes-base/node-param-description-boolean-without-whether description: '

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} }.

If that is not intended this can be deactivated, it will then set { "a.b": value } instead.

.', }, ], }, // ---------------------------------- // incr // ---------------------------------- { displayName: 'Key', name: 'key', type: 'string', displayOptions: { show: { operation: ['incr'], }, }, default: '', required: true, description: 'Name of the key to increment', }, { displayName: 'Expire', name: 'expire', type: 'boolean', displayOptions: { show: { operation: ['incr'], }, }, default: false, description: 'Whether to set a timeout on key', }, { displayName: 'TTL', name: 'ttl', type: 'number', typeOptions: { minValue: 1, }, displayOptions: { show: { operation: ['incr'], expire: [true], }, }, default: 60, description: 'Number of seconds before key expiration', }, // ---------------------------------- // keys // ---------------------------------- { displayName: 'Key Pattern', name: 'keyPattern', type: 'string', displayOptions: { show: { operation: ['keys'], }, }, default: '', required: true, description: 'The key pattern for the keys to return', }, { displayName: 'Get Values', name: 'getValues', type: 'boolean', displayOptions: { show: { operation: ['keys'], }, }, default: true, description: 'Whether to get the value of matching keys', }, // ---------------------------------- // set // ---------------------------------- { displayName: 'Key', name: 'key', type: 'string', displayOptions: { show: { operation: ['set'], }, }, default: '', required: true, description: 'Name of the key to set in Redis', }, { displayName: 'Value', name: 'value', type: 'string', displayOptions: { show: { operation: ['set'], }, }, default: '', description: 'The value to write in Redis', }, { displayName: 'Key Type', name: 'keyType', type: 'options', displayOptions: { show: { operation: ['set'], }, }, options: [ { name: 'Automatic', value: 'automatic', description: 'Tries to figure out the type automatically depending on the data', }, { name: 'Hash', value: 'hash', description: "Data in key is of type 'hash'", }, { name: 'List', value: 'list', description: "Data in key is of type 'lists'", }, { name: 'Sets', value: 'sets', description: "Data in key is of type 'sets'", }, { name: 'String', value: 'string', description: "Data in key is of type 'string'", }, ], default: 'automatic', description: 'The type of the key to set', }, { displayName: 'Expire', name: 'expire', type: 'boolean', displayOptions: { show: { operation: ['set'], }, }, default: false, description: 'Whether to set a timeout on key', }, { displayName: 'TTL', name: 'ttl', type: 'number', typeOptions: { minValue: 1, }, displayOptions: { show: { operation: ['set'], expire: [true], }, }, default: 60, description: 'Number of seconds before key expiration', }, // ---------------------------------- // publish // ---------------------------------- { displayName: 'Channel', name: 'channel', type: 'string', displayOptions: { show: { operation: ['publish'], }, }, default: '', required: true, description: 'Channel name', }, { displayName: 'Data', name: 'messageData', type: 'string', displayOptions: { show: { operation: ['publish'], }, }, typeOptions: { alwaysOpenEditWindow: true, }, default: '', required: true, description: 'Data to publish', }, // ---------------------------------- // push/pop // ---------------------------------- { displayName: 'List', name: 'list', type: 'string', displayOptions: { show: { operation: ['push', 'pop'], }, }, default: '', required: true, description: 'Name of the list in Redis', }, { displayName: 'Data', name: 'messageData', type: 'string', displayOptions: { show: { operation: ['push'], }, }, typeOptions: { alwaysOpenEditWindow: true, }, default: '', required: true, description: 'Data to push', }, { displayName: 'Tail', name: 'tail', type: 'boolean', displayOptions: { show: { operation: ['push', 'pop'], }, }, default: false, description: 'Whether to push or pop data from the end of the list', }, { displayName: 'Name', name: 'propertyName', type: 'string', displayOptions: { show: { operation: ['pop'], }, }, default: 'propertyName', description: 'Optional name of the property to write received data to. Supports dot-notation. Example: "data.person[0].name".', }, { displayName: 'Options', name: 'options', type: 'collection', displayOptions: { show: { operation: ['pop'], }, }, placeholder: 'Add Option', default: {}, options: [ { displayName: 'Dot Notation', name: 'dotNotation', type: 'boolean', default: true, // eslint-disable-next-line n8n-nodes-base/node-param-description-boolean-without-whether description: '

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} }.

If that is not intended this can be deactivated, it will then set { "a.b": value } instead.

.', }, ], }, ], }; methods = { credentialTest: { async redisConnectionTest( this: ICredentialTestFunctions, credential: ICredentialsDecrypted, ): Promise { const credentials = credential.data as ICredentialDataDecryptedObject; 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; } try { const client = redis.createClient(redisOptions); // tslint:disable-next-line: no-any const _data = await new Promise((resolve, reject): any => { client.on('connect', async () => { client.ping('ping', (error, pong) => { if (error) reject(error); resolve(pong); client.quit(); }); }); client.on('error', async (err) => { client.quit(); reject(err); }); }); } catch (error) { return { status: 'Error', message: error.message, }; } return { status: 'OK', message: 'Connection successful!', }; }, }, }; async execute(this: IExecuteFunctions): Promise { // Parses the given value in a number if it is one else returns a string function getParsedValue(value: string): string | number { if (value.match(/^[\d\.]+$/) === null) { // Is a string return value; } else { // Is a number return parseFloat(value); } } // Converts the Redis Info String into an object function convertInfoToObject(stringData: string): IDataObject { const returnData: IDataObject = {}; let key: string, value: string; for (const line of stringData.split('\n')) { if (['#', ''].includes(line.charAt(0))) { continue; } [key, value] = line.split(':'); if (key === undefined || value === undefined) { continue; } value = value.trim(); if (value.includes('=')) { returnData[key] = {}; let key2: string, value2: string; for (const keyValuePair of value.split(',')) { [key2, value2] = keyValuePair.split('='); (returnData[key] as IDataObject)[key2] = getParsedValue(value2); } } else { returnData[key] = getParsedValue(value); } } return returnData; } async function getValue(client: redis.RedisClient, keyName: string, type?: string) { if (type === undefined || type === 'automatic') { // Request the type first const clientType = util.promisify(client.type).bind(client); type = await clientType(keyName); } if (type === 'string') { const clientGet = util.promisify(client.get).bind(client); return clientGet(keyName); } else if (type === 'hash') { const clientHGetAll = util.promisify(client.hgetall).bind(client); return clientHGetAll(keyName); } else if (type === 'list') { const clientLRange = util.promisify(client.lrange).bind(client); return clientLRange(keyName, 0, -1); } else if (type === 'sets') { const clientSMembers = util.promisify(client.smembers).bind(client); return clientSMembers(keyName); } } const setValue = async ( client: redis.RedisClient, keyName: string, value: string | number | object | string[] | number[], expire: boolean, ttl: number, type?: string, ) => { 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); for (const key of Object.keys(value)) { // @ts-ignore await clientHset(keyName, key, (value as IDataObject)[key]!.toString()); } } 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 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); 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); } }); }); } }