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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace HandBrakeWPF.Utilities.Input
{
using System.IO;
using HandBrakeWPF.Helpers;
/// <summary>
/// Imports chapter markers in the ChaptersDb.org TXT format
/// More info: http://www.chapterdb.org/docs
/// </summary>
public class ChapterImporterTxt
{
/// <summary>
/// The file filter value for the OpenFileDialog
/// </summary>
public static string FileFilter => "Text files (*.txt)|*.txt";
/// <summary>
/// Imports all chapter information from the given <see cref="filename"/> into the <see cref="chapterMap"/> dictionary.
/// </summary>
/// <param name="filename">The full path and filename of the chapter marker file to import</param>
/// <param name="chapterMap">The dictionary that should be populated with parsed chapter markers</param>
public static void Import(string filename, ref Dictionary<int, Tuple<string, TimeSpan>> chapterMap)
{
using (var file = new StreamReader(filename))
{
// Indexing is 1-based
int chapterMapIdx = 1;
TimeSpan prevChapterStart = TimeSpan.Zero;
while (!file.EndOfStream)
{
// Read the lines in pairs, the duration is always first then the chapter name
var chapterStartRaw = file.ReadLine();
var chapterName = file.ReadLine();
// If either of the values is null then the end of the file has been reached and we need to terminate
if (chapterName == null || chapterStartRaw == null)
break;
// Split the values on '=' and take the left side
chapterName = chapterName.Split(new []{ '=' }, 2).LastOrDefault();
chapterStartRaw = chapterStartRaw.Split(new[] { '=' }, 2).LastOrDefault();
// Parse the time
if(!string.IsNullOrWhiteSpace(chapterStartRaw))
{
var chapterStart = TimeSpanHelper.ParseChapterTimeStart(chapterStartRaw);
// If we're past the first chapter in the file then calculate the duration for the previous chapter
if (chapterMapIdx > 1)
{
var old = chapterMap[chapterMapIdx - 1];
chapterMap[chapterMapIdx - 1] = new Tuple<string, TimeSpan>(old.Item1, chapterStart - prevChapterStart);
}
prevChapterStart = chapterStart;
}
// Save the chapter info, we calculate the duration in the next iteration (look back)
chapterMap[chapterMapIdx++] = new Tuple<string, TimeSpan>(chapterName, TimeSpan.Zero);
}
}
}
}
}
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