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

apeman app to handle restful endpoint.

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

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

const trigger = 'RestHandler'

/** @lends validateDataType */
function validateDataType (data, type) {
  type = [].concat(type || [])
  if (!data) {
    return null
  }
  if (!data.type) {
    return validateDataType.missingError('/data/type', type)
  }
  let valid = !!~type.indexOf(data.type)
  if (valid) {
    return null
  } else {
    return validateDataType.invalidError('/data/type', data.type, type)
  }
}

Object.assign(validateDataType, {
  bulk (data, type) {
    type = [].concat(type || [])
    let errors = data.map((data, i) =>
      validateDataType(data, type)
    ).map((error, i) =>
      error ? Object.assign(error, {
        source: { pointer: `data/${i}/type` }
      }) : null
    ).filter((error) => !!error)
    return errors.length > 0 ? errors : null
  },

  missingError (pointer, available) {
    let code = ApErrorCodes.RESOURCE_TYPE_MISSING_ERROR
    return Object.assign(
      apemanerror.newError(code, pointer, {
        trigger,
        scope: { available }
      }),
      { status: '400' }
    )
  },

  invalidError (pointer, given, allowed) {
    let code = ApErrorCodes.RESOURCE_TYPE_INVALID_ERROR
    return Object.assign(
      apemanerror.newError(code, pointer, {
        trigger,
        scope: { given, allowed }
      }),
      { status: '400' }
    )
  }
})

module.exports = validateDataType