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raml-validate.ts
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raml-validate.ts
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/// <reference path="../../typings/main.d.ts" />
export type ParameterValueMap = { [parameterName: string]: any }
/**
* Exported API
*/
export interface Validate {
(parameters: Raml08Parser.NamedParameterMap): (check: ParameterValueMap ) => ValidationsResult
rule: (parameter: Raml08Parser.NamedParameter) => ValidationFunction
RULES: RulesObject
TYPES: TypesObject
}
export interface ValidationResult {
valid: boolean
key: string
value: any
rule: string
attr: any
}
export interface ValidationsResult {
valid: boolean
errors: ValidationResult[]
}
var _toString = Object.prototype.toString
function isDateType (check: any): boolean {
return _toString.call(check) === '[object Date]' && !isNaN(check.getTime())
}
function isBooleanType (check: any): boolean {
return typeof check === 'boolean'
}
function isStringType (check: any): boolean {
return typeof check === 'string'
}
function isIntegerType (check: any): boolean {
return typeof check === 'number' && check % 1 === 0
}
function isNumberType (check: any): boolean {
return typeof check === 'number' && isFinite(check)
}
interface Validator<T> {
( v: T ): boolean
}
function isMinimum (min: number): Validator<number> {
return function (check: number): boolean {
return check >= min
}
}
function isMaximum (max: number): Validator<number> {
return function (check: number): boolean {
return check <= max
}
}
function isMinimumLength (min: number): Validator<string> {
return function (check: string): boolean {
return Buffer.byteLength(check) >= min
}
}
function isMaximumLength (max: number): Validator<string> {
return function (check: string) {
return Buffer.byteLength(check) <= max
}
}
function isEnum (values: any[]): Validator<any> {
if (values && values.length != 0) {
return function (check:any):boolean {
return values.indexOf(check) > -1
}
}
else {
return function (check:any):boolean {
return true;
}
}
}
function isPattern (pattern: string | RegExp): (check: string) => boolean {
var regexp = (typeof pattern === 'string') ? new RegExp(pattern) : pattern
return regexp.test.bind(regexp)
}
export type CheckFunction = (check: any, key?: string, src?: ParameterValueMap) => boolean
export type RuleFunction = (rule: any, key: string) => CheckFunction
export type ValidationFunction = (check: any, key: string, src: ParameterValueMap) => ValidationResult
export type RulesObject = { [rule: string]: RuleFunction }
export type TypesObject = { [rule: string]: CheckFunction }
function toValidationResult (valid: boolean, key: string, value: any, rule?: string, attr?: any): ValidationResult {
return {
valid: valid,
rule: rule,
attr: attr,
value: value,
key: key
}
}
function toValidationFunction (parameter: Raml08Parser.NamedParameter, rules: RulesObject) {
var validations = []
Object.keys(parameter).forEach(function (name) {
var rule = rules[name]
if (!rule) {
return
}
var value = parameter[name]
validations.push([name, rule(value, name), value])
})
return function (value: any, key: string, src: ParameterValueMap): ValidationResult {
for (var i = 0; i < validations.length; i++) {
var validation = validations[i]
var name = validation[0]
var fn = validation[1]
var attr = validation[2]
var valid = fn(value, key, src)
if (!valid) {
return toValidationResult(false, key, value, name, attr)
}
}
return toValidationResult(true, key, value)
}
}
function toValidation (parameter: Raml08Parser.NamedParameter, rules: RulesObject, types: TypesObject): ValidationFunction {
var parameters = Array.isArray(parameter) ? <Array<Raml08Parser.BasicNamedParameter>>parameter : [parameter]
var isOptional = !parameters.length
var simpleValidations = []
var repeatValidations = []
parameters.forEach(function (parameter) {
var validation = [parameter.type || 'string', toValidationFunction(parameter, rules)]
if (!parameter.required) {
isOptional = true
}
if (parameter.repeat) {
repeatValidations.push(validation)
} else {
simpleValidations.push(validation)
}
})
return function (value: any, key: string, src: ParameterValueMap): ValidationResult {
if (value == null) {
return toValidationResult(isOptional, key, value, 'required', !isOptional)
}
var isArray = Array.isArray(value)
var values = isArray ? value : [value]
var validations = isArray ? repeatValidations : simpleValidations
if (!validations.length) {
return toValidationResult(false, key, value, 'repeat', !isArray)
}
var response = null
var originalValue = value
validations.some(function (validation) {
var isValidType = values.every(function (value) {
var paramType = validation[0]
var isValidType = types[paramType] && types[paramType](value, key, src)
if (!isValidType) {
response = toValidationResult(false, key, originalValue, 'type', paramType)
}
return isValidType
})
if (!isValidType) {
return false
}
values.every(function (value) {
var fn = validation[1]
response = fn(value, key)
return response.valid
})
return true
})
return response
}
}
export function validate () {
var TYPES: TypesObject = {
date: isDateType,
number: isNumberType,
integer: isIntegerType,
boolean: isBooleanType,
string: isStringType
}
var RULES: RulesObject = {
minimum: isMinimum,
maximum: isMaximum,
minLength: isMinimumLength,
maxLength: isMaximumLength,
'enum': isEnum,
pattern: isPattern
}
function rule (parameter: Raml08Parser.NamedParameter): ValidationFunction {
return toValidation(parameter, RULES, TYPES)
}
var v: Validate
var validate: any = function (parameterMap: Raml08Parser.NamedParameterMap) {
if (!parameterMap) {
return function (check: ParameterValueMap) {
return { valid: true, errors: []}
}
}
var validations = {}
Object.keys(parameterMap).forEach(function (key) {
validations[key] = rule(<Raml08Parser.NamedParameter>parameterMap[key])
})
return function (src?: ParameterValueMap): ValidationsResult {
src = src || {}
var errors = Object.keys(validations)
.map(function (param) {
var value = src[param]
var fn = validations[param]
return fn(value, param, src)
})
.filter(function (result) {
return !result.valid
})
return {
valid: errors.length === 0,
errors: errors
}
}
}
v = validate
v.rule = rule
v.TYPES = TYPES
v.RULES = RULES
return v
}
// export = validate