96 lines
2.3 KiB
Dart
96 lines
2.3 KiB
Dart
/// UI 常量整合導出
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///
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/// 統一導出所有設計 token，方便使用
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/// 使用方式: import 'ui/shared/ui_constants.dart';
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// 導出顏色系統
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export '../../core/theme/app_color_scheme.dart';
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// 導出主題配置 (包含 AppTextStyles, AppSpacing, AppRadius, AppBreakpoints)
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export '../../core/theme/app_theme.dart';
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/// 表單驗證器
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///
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/// 提供常用的表單驗證方法
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class Validators {
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Validators._();
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/// 金額驗證
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static String? amount(String? value) {
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if (value == null || value.isEmpty) {
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return '請輸入金額';
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}
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final amount = double.tryParse(value);
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if (amount == null || amount <= 0) {
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return '請輸入有效金額';
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}
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return null;
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}
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/// 價格驗證
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static String? price(String? value) {
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if (value == null || value.isEmpty) {
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return '請輸入價格';
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}
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final price = double.tryParse(value);
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if (price == null || price <= 0) {
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return '請輸入有效價格';
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}
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return null;
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}
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/// 數量驗證
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static String? quantity(String? value) {
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if (value == null || value.isEmpty) {
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return '請輸入數量';
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}
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final quantity = double.tryParse(value);
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if (quantity == null || quantity <= 0) {
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return '請輸入有效數量';
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}
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return null;
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}
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/// 必填字段驗證
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static String? required(String? value, String fieldName) {
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if (value == null || value.isEmpty) {
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return '請輸入$fieldName';
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}
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return null;
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}
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/// 用戶名驗證
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static String? username(String? value) {
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if (value == null || value.isEmpty) {
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return '請輸入用戶名';
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}
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if (value.length < 3) {
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return '用戶名至少 3 個字符';
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}
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return null;
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}
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/// 密碼驗證
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static String? password(String? value) {
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if (value == null || value.isEmpty) {
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return '請輸入密碼';
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}
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if (value.length < 6) {
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return '密碼至少 6 個字符';
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}
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return null;
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}
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/// 郵箱驗證
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static String? email(String? value) {
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if (value == null || value.isEmpty) {
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return '請輸入郵箱';
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}
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final emailRegex = RegExp(r'^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$');
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if (!emailRegex.hasMatch(value)) {
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return '請輸入有效的郵箱地址';
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}
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return null;
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}
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}
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