98 lines
3.6 KiB
C#
98 lines
3.6 KiB
C#
using LanguageExt.Common;
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using LanguageExt.TypeClasses;
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.DataAnnotations;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace BallanceTasEditor.Utils {
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// YYC MARK:
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// 这些验证器尽管服务于UI，但是并不遵循WPF或者CommunityToolkit.Mvvm的Validator模型，
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// 所以我把他们放在这里。
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/// <summary>
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/// 验证器接口。
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/// </summary>
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/// <typeparam name="TIn">验证器接受的待验证数据的类型。</typeparam>
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/// <typeparam name="TOut">验证器验证完毕后，会输出的类型。</typeparam>
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public interface IValidator<TIn, TOut> {
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/// <summary>
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/// 验证给定数据是否正确。
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/// </summary>
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/// <param name="data">要验证的数据。</param>
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/// <returns>数据正确，或对应的错误信息。</returns>
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ValidationResult Validate(TIn data);
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/// <summary>
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/// 获取验证无误数据转换后的数据。
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/// </summary>
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/// <param name="data">验证无误，用于获取输出的数据。</param>
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/// <returns>输出的数据。</returns>
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/// <exception cref="ArgumentException">给定数据验证时出现错误。</exception>
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TOut Fetch(TIn data);
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}
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/// <summary>
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/// 以字符串呈现的数据的通用验证器
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/// </summary>
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public abstract class StringifiedValueValidator<T> : IValidator<string, T> where T : notnull {
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/// <summary>
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/// 用户需要实现的验证函数。
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/// </summary>
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/// <param name="stringifiedValue">要进行验证的数据。</param>
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/// <returns>验证完毕用于输出的数值，或者验证失败时的错误消息。</returns>
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protected abstract Either<T, string> ValidateValue(string stringifiedValue);
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public ValidationResult Validate(string data) {
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return ValidateValue(data).Match(
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Left: (_) => ValidationResult.Success,
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Right: (v) => new ValidationResult(v)
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);
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}
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public T Fetch(string data) {
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return ValidateValue(data).Match(
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Left: (v) => v,
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Right: (msg) => throw new ArgumentException($"Given value can not pass Validator due to {msg}.")
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);
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}
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}
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public abstract class IntegerValidator : StringifiedValueValidator<int> {
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protected override Either<int, string> ValidateValue(string stringifiedValue) {
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if (int.TryParse(stringifiedValue, out int val)) {
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return Left(val);
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} else {
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return Right("Given string do not represent any valid number.");
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}
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}
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}
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public class FpsValidator : IntegerValidator {
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public static FpsValidator Instance = new FpsValidator();
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protected override Either<int, string> ValidateValue(string stringifiedValue) {
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return base.ValidateValue(stringifiedValue).BindLeft<int>((v) => {
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if (v <= 0) return Right("Fps must be greater than zero.");
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else return Left(v);
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});
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}
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}
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public class CountValidator : IntegerValidator {
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public static FpsValidator Instance = new FpsValidator();
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protected override Either<int, string> ValidateValue(string stringifiedValue) {
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return base.ValidateValue(stringifiedValue).BindLeft<int>((v) => {
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if (v < 0) return Right("Count can not lower than zero.");
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else return Left(v);
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});
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}
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}
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}
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