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use iced::futures;
use iced::futures::Stream;
use log::{error, info, warn};
// use std::env::current_dir;
use youtube_dl_parser::expressions::{mp3_download_expression, mp4_download_expression};
use youtube_dl_parser::reader::{OutputReader, ParsedOutputReader};
use youtube_dl_parser::state::parsed_state::{
DeletingState, DownloadState, ErrorState, FFmpegState, ParsedState, YoutubeState,
};
use youtube_dl_parser::state::ParsedOutputState;
use crate::gui::Message;
use crate::query_cache;
use crate::utils::format::Format;
pub fn parsed_output_stream() -> impl Stream<Item = Message> + Send {
futures::stream::unfold(InternalParsedOutputState::Setup, |state| async move {
match state {
InternalParsedOutputState::Setup => {
// When a subscription is ran, get the url, download directory and format from the cache
let (url, destination, format) = match query_cache::replace_global(None) {
Ok(cache) => match cache {
Some(cache) => cache,
None => {
return Some((
Message::Failed("Cache was empty".to_owned()),
InternalParsedOutputState::Failed,
));
}
},
Err(err) => {
return Some((Message::Failed(err), InternalParsedOutputState::Failed));
}
};
let youtube_dl_executable_name = if cfg!(target_os = "windows") {
"youtube-dl.exe"
} else {
"youtube-dl"
};
// Expect the youtube-dl executable to be in the current directory
// let current_dir = match current_dir()
// .map(|dir| dir.join(youtube_dl_executable_name))
// .map_err(|err| err.to_string())
// .and_then(|path| match path.to_str() {
// None => Err("youtube-dl executable path is not utf-8".to_owned()),
// Some(str) => str,
// })
// .map_err(|err| format!("Unable to obtain current dir: {err}"))
// {
// Ok(current_dir) => current_dir,
// Err(err) => {
// return Some((Message::Failed(err), InternalParsedOutputState::Failed));
// }
// };
let big_cmd = match format {
Format::Mp3 => {
mp3_download_expression(youtube_dl_executable_name, &url, &destination)
}
Format::Mp4 => {
mp4_download_expression(youtube_dl_executable_name, &url, &destination)
}
};
// Get the youtube-dl stdout
let stdout = match big_cmd.stderr_to_stdout().reader() {
Ok(stdout) => stdout,
Err(err) => {
error!("Unable to get stdout: {err}");
return Some((
Message::Failed("No stdout output".to_owned()),
InternalParsedOutputState::Finish,
));
}
};
// Put the stdout into an output reader
let output_reader = OutputReader::new(stdout);
// Get the parsed output
let parsed_output_reader = ParsedOutputReader::new(output_reader);
// Start reading the parsing output
Some((
Message::Empty,
InternalParsedOutputState::Read(parsed_output_reader),
))
}
InternalParsedOutputState::Read(mut parsed_output_reader) => {
let parsed_output_state = match parsed_output_reader.next() {
None => return Some((Message::Saved, InternalParsedOutputState::Finish)),
Some(parsed_output_state) => parsed_output_state,
};
match parsed_output_state {
ParsedOutputState::Parsed(parsed_state) => match parsed_state {
ParsedState::Youtube(youtube_state) => match youtube_state {
YoutubeState::Initiating => {
info!("Starting download");
Some((
Message::Empty,
InternalParsedOutputState::Read(parsed_output_reader),
))
}
YoutubeState::ParseError(err) => {
warn!("Download parse error: {err}");
Some((
Message::Empty,
InternalParsedOutputState::Read(parsed_output_reader),
))
}
},
ParsedState::Download(download_state) => match download_state {
DownloadState::Destination(destination) => {
info!("Saving temp file to: {destination}");
Some((
Message::Empty,
InternalParsedOutputState::Read(parsed_output_reader),
))
}
DownloadState::Resuming(byte) => {
info!("Resuming from byte: {byte}");
Some((
Message::Empty,
InternalParsedOutputState::Read(parsed_output_reader),
))
}
DownloadState::Downloading(
progress,
total_size,
download_speed,
eta,
) => {
info!("Progress: {progress}%, Total size: {total_size} bytes, Download speed: {download_speed} bytes per second, ETA: {eta} seconds");
Some((
Message::Downloading(progress, total_size, download_speed, eta),
InternalParsedOutputState::Read(parsed_output_reader),
))
}
DownloadState::Downloaded(progress, total_size, completion_time) => {
info!("Download finished at {progress}% of {total_size} bytes in {completion_time} seconds");
Some((
Message::Downloaded(progress, total_size, completion_time),
InternalParsedOutputState::Read(parsed_output_reader),
))
}
DownloadState::ParseError(err) => {
warn!("Download parse error: {err}");
Some((
Message::Empty,
InternalParsedOutputState::Read(parsed_output_reader),
))
}
},
ParsedState::FFMpeg(ffmpeg_state) => match ffmpeg_state {
FFmpegState::Destination(destination) => {
info!("Saving mp3 file to: {destination}");
Some((
Message::Converting(destination),
InternalParsedOutputState::Read(parsed_output_reader),
))
}
FFmpegState::ParseError(err) => {
warn!("FFmpeg parse error: {err}");
Some((
Message::Empty,
InternalParsedOutputState::Read(parsed_output_reader),
))
}
},
ParsedState::None(output) => {
warn!("Unrecognized output: {output}");
Some((
Message::Empty,
InternalParsedOutputState::Read(parsed_output_reader),
))
}
ParsedState::Unknown(output) => {
warn!("Unknown state: {output}");
Some((
Message::Empty,
InternalParsedOutputState::Read(parsed_output_reader),
))
}
ParsedState::ParseError(err) => {
warn!("Output parse error: {err}");
Some((
Message::Empty,
InternalParsedOutputState::Read(parsed_output_reader),
))
}
ParsedState::Error(err) => match err {
ErrorState::Error(err) => {
error!("Error occurred: {err}");
Some((Message::Failed(err), InternalParsedOutputState::Failed))
}
},
ParsedState::Deleting(deleting_state) => match deleting_state {
DeletingState::DeletingTemporaryFile(destination) => {
info!("Deleting temporary file at: {destination}");
Some((
Message::Empty,
InternalParsedOutputState::Read(parsed_output_reader),
))
}
DeletingState::ParseError(err) => {
warn!("Deleting parse error: {err}");
Some((
Message::Empty,
InternalParsedOutputState::Read(parsed_output_reader),
))
}
},
},
ParsedOutputState::Finished => {
info!("Finished output");
Some((Message::Saved, InternalParsedOutputState::Finish))
}
ParsedOutputState::Error(err) => {
error!("Exit code: {:?}, Error: {}", err.exit_code, err.error);
Some((
Message::Failed(err.error),
InternalParsedOutputState::Failed,
))
}
}
}
InternalParsedOutputState::Finish => None,
InternalParsedOutputState::Failed => None,
}
})
}
pub enum InternalParsedOutputState {
Setup,
Read(ParsedOutputReader),
Finish,
Failed,
}