prisme-flow/nodes/bridge/elasticsearch/elasticsearch-exists.js

prisme platform flow engine

/**
 * Created by prisme.io on 09/06/2017.
 */

module.exports = function (RED) {
  var elasticsearch = require('elasticsearch')

  function ElasticSearchExists (config) {
    RED.nodes.createNode(this, config)
    this.server = RED.nodes.getNode(config.server)
    var node = this
    this.on('input', function (msg) {
      var client = new elasticsearch.Client({
        host: this.server.host
      })
      var documentId = config.documentId
      var documentIndex = config.documentIndex
      var documentType = config.documentType

      // check for overriding message properties
      if (msg.hasOwnProperty('documentId')) {
        documentId = msg.documentId
      }
      if (msg.hasOwnProperty('documentIndex')) {
        documentIndex = msg.documentIndex
      }
      if (msg.hasOwnProperty('documentType')) {
        documentType = msg.documentType
      }

      // construct the search params
      var params = {
        index: documentIndex,
        type: documentType,
        id: documentId
      }

      client.exists(params).then(function (resp) {
        msg.exists = resp
        node.send(msg)
      }, function (err) {
        node.error(err)
      })
    })
  }
  RED.nodes.registerType('elasticsearch exists', ElasticSearchExists)
}