annotations/Azaion.Annotator/DTO/FormState.cs

using System.Collections.ObjectModel;
using System.IO;
using System.Windows;

namespace Azaion.Annotator.DTO;

public class FormState
{
    public SelectionState SelectionState { get; set; } = SelectionState.None;

    public MediaFileInfo? CurrentMedia { get; set; }
    public string VideoName => string.IsNullOrEmpty(CurrentMedia?.Name)
        ? ""
        : Path.GetFileNameWithoutExtension(CurrentMedia.Name).Replace(" ", "");

    public string CurrentMrl { get; set; }
    public Size CurrentVideoSize { get; set; }
    public TimeSpan CurrentVideoLength { get; set; }

    public int CurrentVolume { get; set; } = 100;
    public ObservableCollection<AnnotationResult> AnnotationResults { get; set; } = [];

    public string GetTimeName(TimeSpan ts) => $"{VideoName}_{ts:hmmssf}";

    public TimeSpan? GetTime(string name)
    {
        var timeStr = name.Split("_").LastOrDefault();
        if (string.IsNullOrEmpty(timeStr))
            return null;
        
        try
        {
            //For some reason, TimeSpan.ParseExact doesn't work on every platform.
            return new TimeSpan(
                days: 0,
                hours: int.Parse(timeStr[0..1]),
                minutes: int.Parse(timeStr[1..3]),
                seconds: int.Parse(timeStr[3..5]),
                milliseconds: int.Parse(timeStr[5..6]) * 100);
        }
        catch (Exception e) {  return null;  }
    }
}