refactor: streamline validation utilities

src/renderer/src/utils/validate.ts

@@ -1,32 +1,34 @@
 import validator from 'validator'
 
-const domainValidator = (value: string): boolean => {
-  if (value.length > 253 || value.length < 2) return false
-
-  // 检查是否为合法的 FQDN (完全限定域名)
-  if (validator.isFQDN(value, { require_tld: true })) return true
-
-  // 允许特殊的本地域名
-  return ['localhost', 'local', 'localdomain'].includes(value.toLowerCase())
+export interface ValidationResult {
+  ok: boolean
+  error?: string
 }
 
-const domainSuffixValidator = (value: string): boolean => {
-  // 域名后缀验证 - 可以是完整域名或带通配符的域名后缀
-  return validator.isFQDN(value, { require_tld: true, allow_wildcard: true })
-}
+type BooleanValidator = (value: string) => boolean
 
-const domainKeywordValidator = (value: string): boolean => {
-  // 域名关键字不能包含逗号和空格
-  return (
-    value.length > 0 &&
-    validator.isWhitelisted(
-      value,
-      'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._'
-    )
-  )
-}
+const LOCAL_DOMAINS = new Set(['localhost', 'local', 'localdomain'])
+const NETWORK_TYPES = new Set(['tcp', 'udp'])
+const LOCAL_BYPASS_PLATFORMS = new Set<string>(['win32', 'darwin'])
+const INBOUND_TYPES = new Set([
+  'http',
+  'https',
+  'socks',
+  'socks4',
+  'socks5',
+  'tproxy',
+  'redir',
+  'mixed'
+])
 
-const domainRegexValidator = (value: string): boolean => {
+const DOMAIN_KEYWORD_PATTERN = /^[a-zA-Z0-9._-]+$/
+const DOMAIN_WILDCARD_PATTERN = /^[a-zA-Z0-9.*?-]+$/
+const WINDOWS_PATH_PATTERN = /^[a-zA-Z]:[\\/].+/
+const UNIX_PATH_PATTERN = /^\/.+/
+const ANDROID_PACKAGE_PATTERN = /^[a-z][a-z0-9_]*(\.[a-z][a-z0-9_]*)+$/i
+const PROCESS_NAME_PATTERN = /^[a-zA-Z0-9._-]+$/
+
+const isValidRegex: BooleanValidator = (value) => {
   try {
     new RegExp(value)
     return true
@@ -35,62 +37,82 @@ const domainRegexValidator = (value: string): boolean => {
   }
 }
 
-const portValidator = (value: string): boolean => {
-  return validator.isPort(value)
-}
+const isNamedIdentifier = (value: string, ignore = '-_'): boolean =>
+  value.length > 0 && validator.isAlphanumeric(value, 'en-US', { ignore })
 
-const ipv4CIDRValidator = (value: string): boolean => {
-  // 验证 IPv4 CIDR 格式 (例如：192.168.1.0/24)
-  if (!value.includes('/')) return false
+const replaceWildcards = (value: string): string => value.replace(/\*/g, 'a').replace(/\?/g, 'a')
 
-  const [ip, cidr] = value.split('/')
-  const cidrNum = parseInt(cidr, 10)
+const isValidHostname = (host: string): boolean =>
+  validator.isFQDN(host, { require_tld: false }) ||
+  validator.isAlphanumeric(host, 'en-US', { ignore: '-.' })
 
-  return validator.isIP(ip, 4) && !isNaN(cidrNum) && cidrNum >= 0 && cidrNum <= 32
-}
+const validationResult = (ok: boolean, error: string): ValidationResult =>
+  ok ? { ok: true } : { ok: false, error }
 
-const ipv6CIDRValidator = (value: string): boolean => {
-  // 验证 IPv6 CIDR 格式 (例如：2001:db8::/32)
-  if (!value.includes('/')) return false
+const integerValidator =
+  (min: number, max: number): BooleanValidator =>
+  (value) =>
+    validator.isInt(value, { min, max })
 
-  const [ip, cidr] = value.split('/')
-  const cidrNum = parseInt(cidr, 10)
-
-  return validator.isIP(ip, 6) && !isNaN(cidrNum) && cidrNum >= 0 && cidrNum <= 128
-}
-
-// 便捷函数：将 ValidationResult 转换为布尔值
 export const isValid = (result: ValidationResult): boolean => result.ok
-
-// 便捷函数：获取错误信息
 export const getError = (result: ValidationResult): string | undefined => result.error
 
-// IP CIDR 验证器（同时支持 IPv4 和 IPv6）
-const ipCIDRValidator = (value: string): boolean => {
-  return ipv4CIDRValidator(value) || ipv6CIDRValidator(value)
+// Domain rules
+
+export const domainValidator: BooleanValidator = (value) => {
+  if (value.length < 2 || value.length > 253) return false
+
+  return validator.isFQDN(value, { require_tld: true }) || LOCAL_DOMAINS.has(value.toLowerCase())
 }
 
-const sysProxyBypassValidator = (
+export const domainSuffixValidator: BooleanValidator = (value) =>
+  validator.isFQDN(value, { require_tld: true, allow_wildcard: true })
+
+export const domainKeywordValidator: BooleanValidator = (value) =>
+  DOMAIN_KEYWORD_PATTERN.test(value)
+
+export const domainRegexValidator = isValidRegex
+
+export const domainWildcardValidator: BooleanValidator = (value) => {
+  if (!DOMAIN_WILDCARD_PATTERN.test(value)) return false
+
+  const normalizedDomain = replaceWildcards(value)
+  return (
+    normalizedDomain.includes('.') && validator.isFQDN(normalizedDomain, { require_tld: false })
+  )
+}
+
+// Network rules
+
+export const portValidator: BooleanValidator = (value) => validator.isPort(value)
+
+export const portRangeValidator: BooleanValidator = (value) => {
+  const [start, end, ...rest] = value.split('-')
+
+  if (end === undefined) return validator.isPort(start)
+  if (rest.length > 0) return false
+
+  return validator.isPort(start) && validator.isPort(end) && Number(start) <= Number(end)
+}
+
+export const ipv4CIDRValidator: BooleanValidator = (value) => validator.isIPRange(value, 4)
+export const ipv6CIDRValidator: BooleanValidator = (value) => validator.isIPRange(value, 6)
+export const ipCIDRValidator: BooleanValidator = (value) => validator.isIPRange(value)
+
+export const sysProxyBypassValidator = (
   value: string,
   targetPlatform: NodeJS.Platform | string
 ): boolean => {
   const entry = value.trim()
-  if (entry === '') return false
-
+  if (!entry) return false
   if (validator.isIP(entry)) return true
-
   if (targetPlatform !== 'win32' && validator.isIPRange(entry)) return true
 
-  if (
-    (targetPlatform === 'win32' || targetPlatform === 'darwin') &&
-    entry.toLowerCase() === '<local>'
-  ) {
-    return true
-  }
+  const normalizedEntry = entry.toLowerCase()
+  if (LOCAL_BYPASS_PLATFORMS.has(targetPlatform) && normalizedEntry === '<local>') return true
 
   if (targetPlatform === 'win32' && /[*?]/.test(entry)) {
-    const normalizedPattern = entry.replace(/\*/g, 'wildcard').replace(/\?/g, 'q')
-    return validator.isFQDN(normalizedPattern, {
+    return validator.isFQDN(entry.replace(/\*/g, 'wildcard').replace(/\?/g, 'q'), {
       require_tld: false,
       allow_numeric_tld: true
     })
@@ -103,321 +125,106 @@ const sysProxyBypassValidator = (
   })
 }
 
-// DOMAIN-WILDCARD 验证器 - 仅支持 * 和 ? 通配符
-const domainWildcardValidator = (value: string): boolean => {
-  if (value.length === 0) return false
-  // 检查是否只包含合法字符（字母、数字、点、*、?、-）
-  const validPattern = /^[a-zA-Z0-9.*?-]+$/
-  if (!validPattern.test(value)) return false
-  // 移除通配符后验证基本格式
-  const withoutWildcards = value.replace(/\*/g, 'a').replace(/\?/g, 'a')
-  // 至少要有一个点（域名结构）
-  return withoutWildcards.includes('.')
-}
+// Rule values
 
-// GEOSITE 验证器 - 站点名称验证
-const geositeValidator = (value: string): boolean => {
-  // GEOSITE 名称只能包含字母、数字、连字符和下划线
-  return validator.isAlphanumeric(value, 'en-US', { ignore: '-_' }) && value.length > 0
-}
+export const geositeValidator: BooleanValidator = (value) => isNamedIdentifier(value)
+export const geoipValidator: BooleanValidator = (value) => validator.isISO31661Alpha2(value)
+export const asnValidator = integerValidator(1, 4_294_967_295)
+export const uidValidator = integerValidator(0, 65_535)
+export const dscpValidator = integerValidator(0, 63)
+export const networkValidator: BooleanValidator = (value) => NETWORK_TYPES.has(value.toLowerCase())
 
-// GEOIP 验证器 - 国家代码验证（ISO 3166-1 alpha-2）
-const geoipValidator = (value: string): boolean => {
-  // 支持 2 位国家代码（大小写不敏感）
-  return validator.isAlpha(value) && value.length === 2
-}
+export const inTypeValidator: BooleanValidator = (value) =>
+  value.split('/').every((type) => INBOUND_TYPES.has(type.toLowerCase()))
 
-// ASN 验证器 - 自治系统号验证
-const asnValidator = (value: string): boolean => {
-  // ASN 范围：1 - 4294967295 (32-bit)
-  return validator.isInt(value, { min: 1, max: 4294967295 })
-}
+export const inUserValidator: BooleanValidator = (value) =>
+  value.length > 0 && value.split('/').every((user) => isNamedIdentifier(user, '-_.'))
 
-// UID 验证器 - Linux 用户 ID 验证
-const uidValidator = (value: string): boolean => {
-  // UID 范围：0 - 65535 (大多数系统)
-  return validator.isInt(value, { min: 0, max: 65535 })
-}
+export const inNameValidator: BooleanValidator = (value) => isNamedIdentifier(value)
+export const ruleSetValidator: BooleanValidator = (value) => isNamedIdentifier(value)
 
-// DSCP 验证器 - 区分服务代码点验证
-const dscpValidator = (value: string): boolean => {
-  // DSCP 范围：0 - 63 (6-bit)
-  return validator.isInt(value, { min: 0, max: 63 })
-}
+// Process rules
 
-// NETWORK 验证器 - 网络类型验证
-const networkValidator = (value: string): boolean => {
-  return validator.isIn(value.toLowerCase(), ['tcp', 'udp'])
-}
+export const processPathValidator: BooleanValidator = (value) =>
+  WINDOWS_PATH_PATTERN.test(value) ||
+  UNIX_PATH_PATTERN.test(value) ||
+  ANDROID_PACKAGE_PATTERN.test(value)
 
-// 进程路径验证器
-const processPathValidator = (value: string): boolean => {
-  if (value.length === 0) return false
-  // Windows 路径或 Unix 路径
-  const windowsPath = /^[a-zA-Z]:[\\/].+/
-  const unixPath = /^\/.*/
-  const androidPackage = /^[a-z][a-z0-9_]*(\.[a-z][a-z0-9_]*)+$/i
-  return windowsPath.test(value) || unixPath.test(value) || androidPackage.test(value)
-}
+export const processPathWildcardValidator: BooleanValidator = (value) =>
+  value.length > 0 && processPathValidator(replaceWildcards(value))
 
-// 进程路径通配符验证器
-const processPathWildcardValidator = (value: string): boolean => {
-  if (value.length === 0) return false
-  // 包含通配符的路径，移除通配符后检查路径格式
-  const withoutWildcards = value.replace(/\*/g, 'a').replace(/\?/g, 'a')
-  return processPathValidator(withoutWildcards)
-}
+export const processPathRegexValidator = isValidRegex
 
-// 进程路径正则验证器
-const processPathRegexValidator = (value: string): boolean => {
-  try {
-    new RegExp(value)
-    return true
-  } catch {
-    return false
-  }
-}
+export const processNameValidator: BooleanValidator = (value) => PROCESS_NAME_PATTERN.test(value)
 
-// 进程名称验证器
-const processNameValidator = (value: string): boolean => {
-  if (value.length === 0) return false
-  // 进程名或 Android 包名
-  const processName = /^[a-zA-Z0-9\-_.]+$/
-  const androidPackage = /^[a-z][a-z0-9_]*(\.[a-z][a-z0-9_]*)+$/i
-  return processName.test(value) || androidPackage.test(value)
-}
+export const processNameWildcardValidator: BooleanValidator = (value) =>
+  value.length > 0 && processNameValidator(replaceWildcards(value))
 
-// 进程名称通配符验证器
-const processNameWildcardValidator = (value: string): boolean => {
-  if (value.length === 0) return false
-  // 移除通配符后检查进程名格式
-  const withoutWildcards = value.replace(/\*/g, 'a').replace(/\?/g, 'a')
-  return processNameValidator(withoutWildcards)
-}
+export const processNameRegexValidator = isValidRegex
 
-// 进程名称正则验证器
-const processNameRegexValidator = (value: string): boolean => {
-  try {
-    new RegExp(value)
-    return true
-  } catch {
-    return false
-  }
-}
+// Logical rules
 
-// IN-TYPE 验证器 - 入站类型验证
-const inTypeValidator = (value: string): boolean => {
-  // 支持单个或多个类型（用 / 分隔）
-  const types = value.split('/')
-  const validTypes = ['http', 'https', 'socks', 'socks4', 'socks5', 'tproxy', 'redir', 'mixed']
-  return types.length > 0 && types.every((type) => validator.isIn(type.toLowerCase(), validTypes))
-}
+export const logicRuleValidator: BooleanValidator = (value) => {
+  if (!value.startsWith('(') || !value.endsWith(')')) return false
 
-// IN-USER 验证器 - 入站用户名验证
-const inUserValidator = (value: string): boolean => {
-  if (value.length === 0) return false
-  // 支持多个用户名（用 / 分隔）
-  const users = value.split('/')
-  return users.every(
-    (user) => user.length > 0 && validator.isAlphanumeric(user, 'en-US', { ignore: '-_.' })
-  )
-}
-
-// IN-NAME 验证器 - 入站名称验证
-const inNameValidator = (value: string): boolean => {
-  // 入站名称可以包含字母、数字、连字符和下划线
-  return validator.isAlphanumeric(value, 'en-US', { ignore: '-_' }) && value.length > 0
-}
-
-// RULE-SET 验证器 - 规则集名称验证
-const ruleSetValidator = (value: string): boolean => {
-  // 规则集名称（对应 rule-providers 中定义的名称）
-  return validator.isAlphanumeric(value, 'en-US', { ignore: '-_' }) && value.length > 0
-}
-
-// 逻辑规则验证器 - AND, OR, NOT
-const logicRuleValidator = (value: string): boolean => {
-  if (value.length === 0) return false
-  // 检查括号是否匹配
   let depth = 0
   for (const char of value) {
-    if (char === '(') depth++
-    if (char === ')') depth--
+    if (char === '(') depth += 1
+    if (char === ')') depth -= 1
     if (depth < 0) return false
   }
-  return depth === 0 && value.startsWith('(') && value.endsWith(')')
+
+  return depth === 0
 }
 
-// SUB-RULE 验证器 - 子规则验证
-const subRuleValidator = (value: string): boolean => {
-  if (value.length === 0) return false
-  // 格式：(RULE_TYPE,payload) 或 provider_name
-  if (value.startsWith('(') && value.endsWith(')')) {
-    return logicRuleValidator(value)
-  }
-  // 如果不是括号格式，则视为 provider 名称
-  return ruleSetValidator(value)
+export const subRuleValidator: BooleanValidator = (value) => {
+  if (!value) return false
+  return value.startsWith('(') && value.endsWith(')')
+    ? logicRuleValidator(value)
+    : ruleSetValidator(value)
 }
 
-// 端口范围验证器（支持单个端口或范围）
-const portRangeValidator = (value: string): boolean => {
-  // 支持单个端口或范围格式，如：80 或 8000-9000
-  if (value.includes('-')) {
-    const [start, end] = value.split('-')
-    return validator.isPort(start) && validator.isPort(end) && parseInt(start) <= parseInt(end)
-  }
-  return validator.isPort(value)
-}
+// Structured validation results
 
-export {
-  domainValidator,
-  domainSuffixValidator,
-  domainKeywordValidator,
-  domainRegexValidator,
-  domainWildcardValidator,
-  geositeValidator,
-  geoipValidator,
-  asnValidator,
-  uidValidator,
-  dscpValidator,
-  networkValidator,
-  processPathValidator,
-  processPathWildcardValidator,
-  processPathRegexValidator,
-  processNameValidator,
-  processNameWildcardValidator,
-  processNameRegexValidator,
-  inTypeValidator,
-  inUserValidator,
-  inNameValidator,
-  ruleSetValidator,
-  logicRuleValidator,
-  subRuleValidator,
-  portValidator,
-  portRangeValidator,
-  ipv4CIDRValidator,
-  ipv6CIDRValidator,
-  ipCIDRValidator,
-  sysProxyBypassValidator
-}
+export const isIPv4 = (ip: string): ValidationResult =>
+  validationResult(validator.isIP(ip, 4), '不是有效的 IPv4 地址')
 
-// 通用验证结果类型
-export interface ValidationResult {
-  ok: boolean
-  error?: string
-}
+export const isIPv6 = (ip: string): ValidationResult =>
+  validationResult(validator.isIP(ip, 6), '不是有效的 IPv6 地址')
 
-// 验证 IPv4 地址
-export const isIPv4 = (ip: string): ValidationResult => {
-  if (!validator.isIP(ip, 4)) {
-    return { ok: false, error: '不是有效的 IPv4 地址' }
-  }
-  return { ok: true }
-}
+export const isValidPort = (port: string): ValidationResult =>
+  validationResult(validator.isPort(port), '端口号必须在 1-65535 范围内')
 
-// 验证 IPv6 地址
-export const isIPv6 = (ip: string): ValidationResult => {
-  if (!validator.isIP(ip, 6)) {
-    return { ok: false, error: '不是有效的 IPv6 地址' }
-  }
-  return { ok: true }
-}
+const validateListenAddress = (
+  input: string | undefined,
+  allowUnbracketedIPv6: boolean
+): ValidationResult => {
+  const value = input?.trim()
+  if (!value) return { ok: true }
 
-// 验证端口
-export const isValidPort = (port: string): ValidationResult => {
-  if (!validator.isPort(port)) {
-    return { ok: false, error: '端口号必须在 1-65535 范围内' }
-  }
-  return { ok: true }
-}
+  if (/^:\d+$/.test(value)) return isValidPort(value.slice(1))
 
-// 验证监听地址
-export const isValidListenAddress = (s: string | undefined): ValidationResult => {
-  if (!s || s.trim() === '') return { ok: true }
+  const separatorIndex = value.lastIndexOf(':')
+  if (separatorIndex < 0) return { ok: false, error: '应包含端口号' }
 
-  const v = s.trim()
-
-  // 格式：:port (仅端口)
-  if (v.startsWith(':')) {
-    return isValidPort(v.slice(1))
-  }
-
-  const idx = v.lastIndexOf(':')
-  if (idx === -1) return { ok: false, error: '应包含端口号' }
-
-  const host = v.slice(0, idx)
-  const port = v.slice(idx + 1)
-
-  // 验证端口
-  const portResult = isValidPort(port)
+  const host = value.slice(0, separatorIndex)
+  const portResult = isValidPort(value.slice(separatorIndex + 1))
   if (!portResult.ok) return portResult
 
-  // 格式：[IPv6]:port
   if (host.startsWith('[') && host.endsWith(']')) {
-    const inner = host.slice(1, -1)
-    return isIPv6(inner)
+    return isIPv6(host.slice(1, -1))
   }
 
-  // IPv4 地址
-  if (validator.isIP(host, 4)) {
-    return { ok: true }
-  }
+  const validHost =
+    validator.isIP(host, 4) ||
+    (allowUnbracketedIPv6 && validator.isIP(host, 6)) ||
+    isValidHostname(host)
 
-  // 域名或主机名 (使用宽松的 FQDN 验证)
-  if (
-    validator.isFQDN(host, { require_tld: false }) ||
-    validator.isAlphanumeric(host, 'en-US', { ignore: '-.' })
-  ) {
-    return { ok: true }
-  }
-
-  return { ok: false, error: '主机名包含非法字符' }
+  return validationResult(validHost, '主机名包含非法字符')
 }
 
-// 验证监听地址（完整版，包含 0.0.0.0 和 ::）
-export const isValidListenAddressFull = (s: string | undefined): ValidationResult => {
-  if (!s || s.trim() === '') return { ok: true }
+export const isValidListenAddress = (input: string | undefined): ValidationResult =>
+  validateListenAddress(input, false)
 
-  const v = s.trim()
-
-  // 格式：:port (仅端口)
-  if (v.startsWith(':')) {
-    return isValidPort(v.slice(1))
-  }
-
-  const idx = v.lastIndexOf(':')
-  if (idx === -1) return { ok: false, error: '应包含端口号' }
-
-  const host = v.slice(0, idx)
-  const port = v.slice(idx + 1)
-
-  // 验证端口
-  const portResult = isValidPort(port)
-  if (!portResult.ok) return portResult
-
-  // 格式：[IPv6]:port
-  if (host.startsWith('[') && host.endsWith(']')) {
-    const inner = host.slice(1, -1)
-    return isIPv6(inner)
-  }
-
-  // 特殊地址：0.0.0.0 (监听所有 IPv4) 或 :: (监听所有 IPv6)
-  if (host === '0.0.0.0' || host === '::') {
-    return { ok: true }
-  }
-
-  // IPv4 地址
-  if (validator.isIP(host, 4)) {
-    return { ok: true }
-  }
-
-  // 域名或主机名 (使用宽松的 FQDN 验证)
-  if (
-    validator.isFQDN(host, { require_tld: false }) ||
-    validator.isAlphanumeric(host, 'en-US', { ignore: '-.' })
-  ) {
-    return { ok: true }
-  }
-
-  return { ok: false, error: '主机名包含非法字符' }
-}
+export const isValidListenAddressFull = (input: string | undefined): ValidationResult =>
+  validateListenAddress(input, true)