52 lines
1.2 KiB
Dart
52 lines
1.2 KiB
Dart
import 'dart:math';
|
|
|
|
import 'package:flutter/material.dart';
|
|
|
|
final _random = Random();
|
|
|
|
int randomInteger(int min, int max) {
|
|
return _random.nextInt(max - min + 1) + min;
|
|
}
|
|
|
|
double randomDouble(double min, double max) {
|
|
return _random.nextDouble() * (max - min) + min;
|
|
}
|
|
|
|
String randomString(
|
|
int minLength,
|
|
int maxLength,
|
|
bool lowercaseAz,
|
|
bool uppercaseAz,
|
|
bool digits,
|
|
) {
|
|
var chars = '';
|
|
if (lowercaseAz) {
|
|
chars += 'abcdefghijklmnopqrstuvwxyz';
|
|
}
|
|
if (uppercaseAz) {
|
|
chars += 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
|
|
}
|
|
if (digits) {
|
|
chars += '0123456789';
|
|
}
|
|
return List.generate(randomInteger(minLength, maxLength),
|
|
(index) => chars[_random.nextInt(chars.length)]).join();
|
|
}
|
|
|
|
// Random date between 1970 and 2025.
|
|
DateTime randomDate() {
|
|
// Random max must be in range 0 < max <= 2^32.
|
|
// So we have to generate the time in seconds and then convert to milliseconds.
|
|
return DateTime.fromMillisecondsSinceEpoch(
|
|
randomInteger(0, 1735689600) * 1000);
|
|
}
|
|
|
|
String randomImageUrl(int width, int height) {
|
|
return 'https://picsum.photos/seed/${_random.nextInt(1000)}/$width/$height';
|
|
}
|
|
|
|
Color randomColor() {
|
|
return Color.fromARGB(
|
|
255, _random.nextInt(255), _random.nextInt(255), _random.nextInt(255));
|
|
}
|