ersatztv/ErsatzTV.Application/Health/Mapper.cs

using ErsatzTV.Core.Api.Health;
using ErsatzTV.Core.Health;

namespace ErsatzTV.Application.Health;

internal static class Mapper
{
    internal static HealthCheckResponseModel ProjectToResponseModel(HealthCheckResult result) =>
        new(
            result.Title,
            GetStatus(result.Status),
            result.Message,
            string.IsNullOrWhiteSpace(result.BriefMessage) ? null : result.BriefMessage,
            result.Link.MatchUnsafe(l => l.Target, () => (string)null),
            result.Link.MatchUnsafe(
                l => new HealthCheckRemediationResponseModel(GetLinkKind(l.Kind), l.Target),
                () => (HealthCheckRemediationResponseModel)null));

    private static string GetStatus(HealthCheckStatus status) =>
        status switch
        {
            HealthCheckStatus.Pass => "pass",
            HealthCheckStatus.Fail => "fail",
            HealthCheckStatus.Warning => "warn",
            HealthCheckStatus.Info => "info",
            // NotApplicable is filtered out before mapping today; map it defensively rather
            // than throwing, so a future caller that skips the filter can't 500 the endpoint.
            HealthCheckStatus.NotApplicable => "notApplicable",
            _ => throw new ArgumentOutOfRangeException(nameof(status), status, null)
        };

    private static string GetLinkKind(HealthCheckLinkKind kind) =>
        kind switch
        {
            HealthCheckLinkKind.ExternalDoc => "ExternalDoc",
            HealthCheckLinkKind.AppRoute => "AppRoute",
            _ => throw new ArgumentOutOfRangeException(nameof(kind), kind, null)
        };
}