NetAdmin/src/backend/NetAdmin/NetAdmin.Domain/DataAbstraction.cs

namespace NetAdmin.Domain;

/// <summary>
///     数据基类
/// </summary>
public abstract record DataAbstraction : IValidatableObject
{
    /// <summary>
    ///     是否已验证
    /// </summary>
    protected bool HasValidated { get; set; }

    /// <summary>
    ///     如果数据校验失败，抛出异常
    /// </summary>
    /// <exception cref="NetAdminValidateException">NetAdminValidateException</exception>
    public void ThrowIfInvalid() {
        if (HasValidated) {
            return;
        }

        var validationResult = this.TryValidate();
        if (!validationResult.IsValid) {
            throw new NetAdminValidateException(
                validationResult.ValidationResults.ToDictionary(x => x.MemberNames.First(), x => new[] { x.ErrorMessage })
            );
        }
    }

    /// <inheritdoc />
    public override string ToString() {
        return this.ToJson();
    }

    /// <summary>
    ///     截断所有字符串属性 以符合[MaxLength(x)]特性
    /// </summary>
    public void TruncateStrings() {
        foreach (var property in GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance).Where(x => x.PropertyType == typeof(string))) {
            var maxLen = property.GetCustomAttribute<MaxLengthAttribute>(true)?.Length;
            if (maxLen is null or 0) {
                continue;
            }

            var value = property.GetValue(this);
            if (value is not string s || s.Length < maxLen) {
                continue;
            }

            s = s.Sub(0, maxLen.Value);
            property.SetValue(this, s);
        }
    }

    /// <inheritdoc />
    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext) {
        HasValidated = true;
        return ValidateInternal(validationContext);
    }

    /// <summary>
    ///     内部验证
    /// </summary>
    protected virtual IEnumerable<ValidationResult> ValidateInternal(ValidationContext validationContext) {
        yield return ValidationResult.Success;
    }
}