/// <summary>
/// Use a <see cref="WebClient"/> to asynchronously download a file and update the console
/// every time another percent completes.
/// </summary>
/// <param name="lecture"></param>
/// <param name="id"></param>
/// <returns></returns>
private async Task DownloadFileAsync(LectureInfo lecture, int id)
{
using (WebClient wc = new WebClient())
{
wc.DownloadProgressChanged += (sender, e) => UpdateConsole(e.ProgressPercentage, lecture, id);
await wc.DownloadFileTaskAsync(lecture.Url, lecture.FileNameMP4);
}
}
/// <summary>
/// Parse the options and fail or start the program accordingly.
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
Options opts = new Options();
OptionSet p = new OptionSet
{
"",
"Usage: lectureconvert [OPTIONS] INPUTDIR",
"Download recorded .mp4 lecture files and convert them into sped up and normalized .mp3s with proper id3 tags for easier on-the-go consumption.",
"",
"Each line in the input.txt text file for the downloaded recordings should be set up as follows for each line:",
" URL/to/file|TrackTitle",
"",
"The resulting filename will be gleaned from the above information, and the filename gleaned from TrackTitle will be normalized so there are no offending characters or spaces for the current filesystem. Additionally, track numbering will simply be performed sequentially within the file starting at 1.",
"The file name is formed as follows:",
" AlbumName_TrackTitle.mp[3|4]",
"",
"Options:",
{
"help|h|?",
"Print this help text and die.",
(val) => opts.Die = true
},
{
"ffmpeg-processes=|fp=",
"The maximum number of ffmpeg processes to let run at one time. FFMpeg is generally constrained by the CPU, so this defaults to Environment.ProcessorCount.",
(val) => opts.FFMpegProcesses = Int32.Parse(val)
},
{
"sox-processes=|sp=",
"The maximum number of sox processes to let run at one time. Sox is generally constrained by the disk, so this defaults to 2.",
(val) => opts.SoxProcesses = Int32.Parse(val)
},
"",
"INPUTDIR:",
"\tThe input file to parse for URLs, file naming, and id3 tag information.",
"",
"Version: 2.0.0"
};
// Parse the args
List<string> dirs;
try
{
dirs = p.Parse(args);
}
catch (OptionException e)
{
Utility.Console.Error(e.Message);
p.WriteOptionDescriptions(Console.Out);
return;
}
// Check if we're asking for help
if (opts.Die)
{
p.WriteOptionDescriptions(Console.Out);
return;
}
// Make sure we have a dir
if (dirs.Count != 1)
{
Utility.Console.Error("Must have one INPUTDIR");
p.WriteOptionDescriptions(Console.Out);
return;
}
// Grab the input file from dir
string inputFile = "";
if (Utility.Directory.Exists(dirs[0]))
{
inputFile = dirs[0] + Path.DirectorySeparatorChar + "input.txt";
LectureInfo.Directory = dirs[0];
if (!Utility.File.Exists(inputFile))
{
inputFile = "";
}
}
// Make sure we have our input file
if (String.IsNullOrEmpty(inputFile))
{
Utility.Console.Error($"Must have an input.txt file in {dirs[0]}");
p.WriteOptionDescriptions(Console.Out);
return;
}
// Parse the input file
try
{
// Open the text file
using (StreamReader r = File.OpenText(inputFile))
{
string line;
// While there are still lines to read
while (!r.EndOfStream)
{
line = r.ReadLine();
// But skip empty lines
if (String.IsNullOrEmpty(line))
{
continue;
}
// Split the line by | and make sure there are two parts
string[] lineData = line.Split('|');
if (lineData.Length != 2)
{
Utility.Console.Error($"Invalid line in input.txt: {line}");
p.WriteOptionDescriptions(Console.Out);
return;
}
// Fill a lecture info
LectureInfo info = new LectureInfo();
info.Url = new Uri(lineData[0]);
info.AlbumName = dirs[0];
info.Title = lineData[1];
opts.Lectures.Add(info);
}
}
}
catch (Exception e)
{
Utility.Console.Error(e.Message);
p.WriteOptionDescriptions(Console.Out);
return;
}
App app = new App(opts);
app.Run();
}
/// <summary>
/// Update the console with the progress completed.
/// </summary>
/// <param name="e"></param>
/// <param name="lecture"></param>
/// <param name="id"></param>
private void UpdateConsole(int progressPercentage, LectureInfo lecture, int id)
{
_statuses[id] = $"{id + 1}:\t{lecture.FileNameMP4} is {progressPercentage}% complete.";
Utility.Console.WriteLinesAndReturn(_statuses.ToArray());
}
