runable
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Phuoc Nguyen
371
lib/core/utils/formatters.dart
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371
lib/core/utils/formatters.dart
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/// Data Formatters for Vietnamese Locale
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///
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/// Provides formatting utilities for currency, dates, phone numbers,
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/// and other data types commonly used in the app.
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library;
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import 'package:intl/intl.dart';
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/// Currency formatter for Vietnamese Dong (VND)
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class CurrencyFormatter {
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CurrencyFormatter._();
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/// Format amount as Vietnamese currency (e.g., "100,000 ₫")
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static String format(double amount, {bool showSymbol = true}) {
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final formatter = NumberFormat.currency(
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locale: 'vi_VN',
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symbol: showSymbol ? '₫' : '',
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decimalDigits: 0,
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);
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return formatter.format(amount);
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}
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/// Format amount with custom precision
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static String formatWithDecimals(
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double amount, {
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int decimalDigits = 2,
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bool showSymbol = true,
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}) {
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final formatter = NumberFormat.currency(
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locale: 'vi_VN',
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symbol: showSymbol ? '₫' : '',
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decimalDigits: decimalDigits,
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);
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return formatter.format(amount);
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}
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/// Format as compact currency (e.g., "1.5M ₫")
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static String formatCompact(double amount, {bool showSymbol = true}) {
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final formatter = NumberFormat.compactCurrency(
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locale: 'vi_VN',
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symbol: showSymbol ? '₫' : '',
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decimalDigits: 1,
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);
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return formatter.format(amount);
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}
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/// Parse currency string to double
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static double? parse(String value) {
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try {
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// Remove currency symbol and spaces
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final cleaned = value.replaceAll(RegExp(r'[₫\s,]'), '');
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return double.tryParse(cleaned);
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} catch (e) {
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return null;
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}
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}
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}
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/// Date and time formatter
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class DateFormatter {
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DateFormatter._();
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/// Format date as "dd/MM/yyyy" (Vietnamese format)
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static String formatDate(DateTime date) {
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final formatter = DateFormat('dd/MM/yyyy', 'vi_VN');
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return formatter.format(date);
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}
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/// Format date as "dd-MM-yyyy"
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static String formatDateDash(DateTime date) {
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final formatter = DateFormat('dd-MM-yyyy', 'vi_VN');
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return formatter.format(date);
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}
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/// Format time as "HH:mm"
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static String formatTime(DateTime date) {
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final formatter = DateFormat('HH:mm', 'vi_VN');
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return formatter.format(date);
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}
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/// Format date and time as "dd/MM/yyyy HH:mm"
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static String formatDateTime(DateTime date) {
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final formatter = DateFormat('dd/MM/yyyy HH:mm', 'vi_VN');
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return formatter.format(date);
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}
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/// Format date as "dd/MM/yyyy lúc HH:mm"
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static String formatDateTimeVN(DateTime date) {
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final formatter = DateFormat('dd/MM/yyyy', 'vi_VN');
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final timeFormatter = DateFormat('HH:mm', 'vi_VN');
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return '${formatter.format(date)} lúc ${timeFormatter.format(date)}';
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}
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/// Format as relative time (e.g., "2 giờ trước")
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static String formatRelative(DateTime date) {
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final now = DateTime.now();
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final difference = now.difference(date);
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if (difference.inSeconds < 60) {
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return 'Vừa xong';
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} else if (difference.inMinutes < 60) {
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return '${difference.inMinutes} phút trước';
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} else if (difference.inHours < 24) {
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return '${difference.inHours} giờ trước';
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} else if (difference.inDays < 7) {
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return '${difference.inDays} ngày trước';
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} else if (difference.inDays < 30) {
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final weeks = (difference.inDays / 7).floor();
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return '$weeks tuần trước';
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} else if (difference.inDays < 365) {
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final months = (difference.inDays / 30).floor();
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return '$months tháng trước';
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} else {
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final years = (difference.inDays / 365).floor();
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return '$years năm trước';
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}
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}
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/// Format as day of week (e.g., "Thứ Hai")
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static String formatDayOfWeek(DateTime date) {
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final formatter = DateFormat('EEEE', 'vi_VN');
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return formatter.format(date);
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}
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/// Format as month and year (e.g., "Tháng 10 năm 2024")
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static String formatMonthYear(DateTime date) {
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final formatter = DateFormat('MMMM yyyy', 'vi_VN');
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return formatter.format(date);
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}
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/// Format as full date with day of week (e.g., "Thứ Hai, 17/10/2024")
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static String formatFullDate(DateTime date) {
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final dayOfWeek = formatDayOfWeek(date);
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final dateStr = formatDate(date);
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return '$dayOfWeek, $dateStr';
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}
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/// Parse date string in format "dd/MM/yyyy"
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static DateTime? parseDate(String dateStr) {
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try {
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final formatter = DateFormat('dd/MM/yyyy');
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return formatter.parse(dateStr);
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} catch (e) {
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return null;
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}
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}
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/// Parse datetime string in format "dd/MM/yyyy HH:mm"
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static DateTime? parseDateTime(String dateTimeStr) {
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try {
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final formatter = DateFormat('dd/MM/yyyy HH:mm');
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return formatter.parse(dateTimeStr);
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} catch (e) {
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return null;
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}
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}
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}
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/// Phone number formatter for Vietnamese phone numbers
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class PhoneFormatter {
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PhoneFormatter._();
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/// Format phone number as "(0xxx) xxx xxx"
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static String format(String phone) {
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// Remove all non-digit characters
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final cleaned = phone.replaceAll(RegExp(r'\D'), '');
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if (cleaned.isEmpty) return '';
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// Handle Vietnamese phone number formats
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if (cleaned.startsWith('84')) {
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// +84 format
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final local = cleaned.substring(2);
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if (local.length >= 9) {
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return '(+84${local.substring(0, 2)}) ${local.substring(2, 5)} ${local.substring(5)}';
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}
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} else if (cleaned.startsWith('0')) {
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// 0xxx format
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if (cleaned.length >= 10) {
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return '(${cleaned.substring(0, 4)}) ${cleaned.substring(4, 7)} ${cleaned.substring(7)}';
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}
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}
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return phone; // Return original if format doesn't match
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}
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/// Format as international number (+84xxx xxx xxx)
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static String formatInternational(String phone) {
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final cleaned = phone.replaceAll(RegExp(r'\D'), '');
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if (cleaned.isEmpty) return '';
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if (cleaned.startsWith('0')) {
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// Convert 0xxx to +84xxx
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final local = cleaned.substring(1);
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if (local.length >= 9) {
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return '+84${local.substring(0, 2)} ${local.substring(2, 5)} ${local.substring(5)}';
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}
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} else if (cleaned.startsWith('84')) {
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final local = cleaned.substring(2);
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if (local.length >= 9) {
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return '+84${local.substring(0, 2)} ${local.substring(2, 5)} ${local.substring(5)}';
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}
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}
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return phone;
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}
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/// Remove formatting to get clean phone number
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static String clean(String phone) {
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return phone.replaceAll(RegExp(r'\D'), '');
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}
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/// Convert to E.164 format (+84xxxxxxxxx)
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static String toE164(String phone) {
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final cleaned = clean(phone);
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if (cleaned.startsWith('0')) {
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return '+84${cleaned.substring(1)}';
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} else if (cleaned.startsWith('84')) {
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return '+$cleaned';
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} else if (cleaned.startsWith('+84')) {
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return cleaned;
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}
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return '+84$cleaned';
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}
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/// Mask phone number (e.g., "0xxx xxx ***")
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static String mask(String phone) {
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final cleaned = clean(phone);
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if (cleaned.length >= 10) {
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return '${cleaned.substring(0, 4)} ${cleaned.substring(4, 7)} ***';
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}
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return phone;
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}
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}
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/// Number formatter
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class NumberFormatter {
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NumberFormatter._();
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/// Format number with thousand separators
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static String format(num number, {int decimalDigits = 0}) {
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final formatter = NumberFormat('#,###', 'vi_VN');
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if (decimalDigits > 0) {
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return formatter.format(number);
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}
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return formatter.format(number.round());
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}
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/// Format as percentage
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static String formatPercentage(
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double value, {
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int decimalDigits = 0,
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bool showSymbol = true,
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}) {
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final formatter = NumberFormat.percentPattern('vi_VN');
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formatter.maximumFractionDigits = decimalDigits;
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formatter.minimumFractionDigits = decimalDigits;
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final result = formatter.format(value / 100);
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return showSymbol ? result : result.replaceAll('%', '');
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}
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/// Format as compact number (e.g., "1.5K")
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static String formatCompact(num number) {
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final formatter = NumberFormat.compact(locale: 'vi_VN');
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return formatter.format(number);
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}
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/// Format file size
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static String formatBytes(int bytes, {int decimals = 2}) {
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if (bytes <= 0) return '0 B';
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const suffixes = ['B', 'KB', 'MB', 'GB', 'TB'];
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final i = (bytes.bitLength - 1) ~/ 10;
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final value = bytes / (1 << (i * 10));
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return '${value.toStringAsFixed(decimals)} ${suffixes[i]}';
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}
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/// Format duration (e.g., "1:30:45")
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static String formatDuration(Duration duration) {
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final hours = duration.inHours;
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final minutes = duration.inMinutes.remainder(60);
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final seconds = duration.inSeconds.remainder(60);
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if (hours > 0) {
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return '${hours.toString().padLeft(2, '0')}:${minutes.toString().padLeft(2, '0')}:${seconds.toString().padLeft(2, '0')}';
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} else {
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return '${minutes.toString().padLeft(2, '0')}:${seconds.toString().padLeft(2, '0')}';
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}
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}
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}
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/// Text formatter utilities
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class TextFormatter {
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TextFormatter._();
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/// Capitalize first letter
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static String capitalize(String text) {
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if (text.isEmpty) return text;
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return text[0].toUpperCase() + text.substring(1);
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}
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/// Capitalize each word
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static String capitalizeWords(String text) {
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if (text.isEmpty) return text;
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return text.split(' ').map((word) => capitalize(word)).join(' ');
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}
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/// Truncate text with ellipsis
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static String truncate(String text, int maxLength, {String ellipsis = '...'}) {
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if (text.length <= maxLength) return text;
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return text.substring(0, maxLength - ellipsis.length) + ellipsis;
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}
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/// Remove diacritics from Vietnamese text
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static String removeDiacritics(String text) {
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const withDiacritics = 'àáạảãâầấậẩẫăằắặẳẵèéẹẻẽêềếệểễìíịỉĩòóọỏõôồốộổỗơờớợởỡùúụủũưừứựửữỳýỵỷỹđ';
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const withoutDiacritics = 'aaaaaaaaaaaaaaaaaeeeeeeeeeeeiiiiioooooooooooooooooouuuuuuuuuuuyyyyyd';
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var result = text.toLowerCase();
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for (var i = 0; i < withDiacritics.length; i++) {
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result = result.replaceAll(withDiacritics[i], withoutDiacritics[i]);
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}
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return result;
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}
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/// Create URL-friendly slug
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static String slugify(String text) {
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var slug = removeDiacritics(text);
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slug = slug.toLowerCase();
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slug = slug.replaceAll(RegExp(r'[^\w\s-]'), '');
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slug = slug.replaceAll(RegExp(r'[-\s]+'), '-');
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return slug;
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}
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}
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/// Loyalty tier formatter
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class LoyaltyFormatter {
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LoyaltyFormatter._();
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/// Format tier name in Vietnamese
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static String formatTier(String tier) {
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switch (tier.toLowerCase()) {
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case 'diamond':
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return 'Kim Cương';
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case 'platinum':
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return 'Bạch Kim';
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case 'gold':
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return 'Vàng';
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default:
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return tier;
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}
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}
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/// Format points with label
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static String formatPoints(int points) {
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return '${NumberFormatter.format(points)} điểm';
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}
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/// Format points progress (e.g., "1,200 / 5,000 điểm")
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static String formatPointsProgress(int current, int target) {
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return '${NumberFormatter.format(current)} / ${NumberFormatter.format(target)} điểm';
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}
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}
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