index.js
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'use strict'
/**
* indicative
*
* (c) Harminder Virk <virk@adonisjs.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
const pope = require('pope')
const _ = require('lodash')
const messagesStore = {}
const arrayExpressionRegex = /\.\d/g
/**
* returns the default message for a validation.
*
* @param {Object} messages
* @param {String} field
* @param {String} validation
*
* @return {String}
*
* @private
*/
function _returnDefaultMessage (messages, field, validation) {
return messagesStore[validation] || '{{validation}} validation failed on {{field}}'
}
/**
* returns a custom validation message for a given validation.
*
* @param {Object} messages
* @param {String} field
* @param {String} validation
*
* @return {String|Function}
*
* @private
*/
function _returnValidationMessage (messages, field, validation) {
return messages[validation]
}
/**
* returns a custom validation message for a given field
* and validation
*
* @param {Object} messages
* @param {String} field
* @param {String} validation
*
* @return {String|Function}
*
* @private
*/
function _returnFieldValidationMessage (messages, field, validation) {
const fieldToArrayExpression = field.replace(arrayExpressionRegex, '.*')
return messages[`${field}.${validation}`] || messages[`${fieldToArrayExpression}.${validation}`]
}
/**
* returns the message method.
*
* @param {Function|String} message
*
* @return {String}
*
* @private
*/
function _makePopeMessage (message) {
return typeof (message) === 'function' ? message : function (field, validation, arg) {
return pope(message, {field, validation, argument: arg})
}
}
/**
* a custom array holding all the validation message
* functions. We will later itterate over this
* array to find the best message.
*
* @type {Array}
*/
const validationMethods = [
_returnFieldValidationMessage,
_returnValidationMessage,
_returnDefaultMessage
]
let Messages = exports = module.exports = {}
/**
* making a message for a given field and validation.
*
* @param {Object} customMessages
* @param {String} field
* @param {String} validation
* @param {Array} args
*
* @return {String}
*/
Messages.make = function (customMessages, field, validation, args) {
return _(validationMethods)
.chain()
.find((method) => method(customMessages, field, validation))
.thru((method) => method(customMessages, field, validation))
.thru((message) => _makePopeMessage(message)(field, validation, args))
.value()
}
/**
* @description sets a message for a given rule
* @method set
* @param {String} name
* @param {String|Function} message
* @public
*/
Messages.set = function (name, message) {
messagesStore[name] = message
}