apeman-app-rest/lib/validating/validate_model_exists.js

apeman app to handle restful endpoint.

/**
 * @function validateModelExists
 * @returns {?Object} - Error if failed.
 */
'use strict'

const apemanerror = require('apemanerror')
const apemanmodel = require('apemanmodel')
const ApErrorCodes = apemanerror.ApErrorCodes

/** @lends validateModelExists */
function validateModelExists (model, id, instance) {
  let type = apemanmodel.toType(model)
  if (!instance) {
    return validateModelExists.notFoundError(type, id)
  }
  return null
}

Object.assign(validateModelExists, {
  bulk (model, ids, instances) {
    let type = apemanmodel.toType(model)
    for (let i = 0; i < ids.length; i++) {
      if (!instances[ i ]) {
        return validateModelExists.notFoundError(type, ids[ i ])
      }
    }
    return null
  },
  notFoundError (type, id) {
    let code = ApErrorCodes.RESOURCE_NOT_FOUND_ERROR
    return Object.assign(
      apemanerror.newError(code, null, {
        trigger: 'RestHandler',
        scope: { type, id }
      }),
      { status: '404' }
    )
  }
})

module.exports = validateModelExists