@wmfs/tymly-pg-plugin/lib/components/state-resources/exporting-csv-delta-file/index.js

Replace Tymly's out-the-box memory storage with PostgreSQL

/**
 * Created by Aron.Moore on 12/07/2017.
 */
'use strict'
const generateDelta = require('@wmfs/pg-delta-file')
const getFunction = require('@wmfs/tymly/lib/getFunction.js')

function loadFunction (env, name) {
  return name
    ? getFunction(env, name)
    : null
} // loadFunction

class ExportingCsvDeltaFile {
  init (resourceConfig, env, callback) {
    this.client = env.bootedServices.storage.client
    this.actionAliases = resourceConfig.actionAliases
    this.createdColumnName = resourceConfig.createdColumnName || '_created'
    this.modifiedColumnName = resourceConfig.modifiedColumnName || '_modified'
    this.csvExtracts = resourceConfig.csvExtracts
    this.transformFunction = loadFunction(env, resourceConfig.transformerFunctionName)
    this.filterFunction = loadFunction(env, resourceConfig.filterFunctionName)
    callback(null)
  }

  run (event, context) {
    generateDelta(
      {
        namespace: context.stateMachineMeta.namespace,
        client: this.client,
        since: event.lastExportDate,
        outputFilepath: event.outputFilepath,
        actionAliases: this.actionAliases,
        transformFunction: this.transformFunction,
        filterFunction: this.filterFunction,
        createdColumnName: this.createdColumnName,
        modifiedColumnName: this.modifiedColumnName,
        csvExtracts: this.csvExtracts
      }
    )
      .then(info => {
        context.sendTaskSuccess({ outputRowCount: info.totalCount })
      })
      .catch(err => {
        context.sendTaskFailure({
          error: 'generateDeltaFail',
          cause: err
        })
      })
  } // run
}

module.exports = ExportingCsvDeltaFile