apeman-app-rest/lib/endpoints/bulk/bulk_relation_destroy_endpoint.js

apeman app to handle restful endpoint.

/**
 * @augments Endpoint
 * @class BulkRelationDestroyEndpoint
 */
'use strict'

const Endpoint = require('../endpoint')

const validateModelExists = require('../../validating/validate_model_exists')

const { defineRelationDestroy } = require('apemanmodel')
const co = require('co')

/** @lends BulkRelationDestroyEndpoint */
class BulkRelationDestroyEndpoint extends Endpoint {
  /**
   * @override
   */
  getDefaultConfig () {
    return {
      name: 'bulkRelationDestroy'
    }
  }

  /**
   * @override
   */
  handle (ctx, next) {
    const s = this
    let succeed = s.bindSucceed(ctx)
    let fail = s.bindFail(ctx)

    let { state } = ctx
    let { data, id } = state

    return co(function * () {
      let error = s.validate(data, state)

      if (error) {
        return fail(error)
      }

      let count = yield s.bulkRelationDestroy(id, data, state)
      return succeed(
        { count }
      )
    })
  }

  /**
   * @override
   */
  validate (data, state) {
    let { model, id, instance } = state
    let existsError = validateModelExists(model, id, instance)
    if (existsError) {
      return existsError
    }
    return null
  }

  bulkRelationDestroy (id, data, state) {
    let { model, association, transaction } = state
    let relationDestroy = defineRelationDestroy(model, association, transaction)
    return co(function * () {
      let count = 0
      for (let d of data) {
        count += yield relationDestroy(id, d)
      }
    })
  }
}

module.exports = BulkRelationDestroyEndpoint