apeman-app-rest/lib/endpoints/related_create_endpoint.js

apeman app to handle restful endpoint.

/**
 * Endpoint for related create
 * @augments Endpoint
 * @class RelatedCreateEndpoint
 */
'use strict'

const Endpoint = require('./endpoint')
const BulkRelatedCreateEndpoint = require('./bulk/bulk_related_create_endpoint')
const validateDataType = require('../validating/validate_data_type')
const validateModelExists = require('../validating/validate_model_exists')

const { toType, toData, defineRelatedCreate } = require('apemanmodel')
const co = require('co')

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

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

    return co(function * () {
      let { state } = ctx
      let { id, data, transaction, association, model } = state
      let isBulk = Array.isArray(data)
      if (isBulk) {
        return yield s.handleBulk(ctx, next)
      }

      let relatedCreate = defineRelatedCreate(model, association, transaction)

      let error = s.validate(data, state)
      if (error) {
        return fail(error)
      }

      let created = yield relatedCreate(id, data)

      return succeed(
        { status: 201 },
        toData(association.target, created, {}),
        { self: `./${created.id}` }
      )
    })
  }

  /**
   * @override
   */
  validate (data, state) {
    let { model, id, instance, association } = state
    let type = toType(association.target)
    let existsError = validateModelExists(model, id, instance)
    if (existsError) {
      return existsError
    }

    let typeError = validateDataType(data, type)
    if (typeError) {
      return typeError
    }
    return null
  }

  handleBulk (ctx, next) {
    const s = this
    return new BulkRelatedCreateEndpoint(s.config).handle(ctx, next)
  }
}

module.exports = RelatedCreateEndpoint