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// yt - A fully featured command line YouTube client
//
// Copyright (C) 2024 Benedikt Peetz <benedikt.peetz@b-peetz.de>
// SPDX-License-Identifier: GPL-3.0-or-later
//
// This file is part of Yt.
//
// You should have received a copy of the License along with this program.
// If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
use std::time::Duration;
use crate::{
app::App,
download::download_options::download_opts,
storage::video_database::{
downloader::{get_next_uncached_video, set_video_cache_path},
extractor_hash::ExtractorHash,
getters::get_video_yt_dlp_opts,
Video,
},
};
use anyhow::{Context, Result};
use log::{debug, info};
use tokio::{task::JoinHandle, time};
mod download_options;
#[derive(Debug)]
pub struct CurrentDownload {
task_handle: JoinHandle<Result<()>>,
extractor_hash: ExtractorHash,
}
impl CurrentDownload {
fn new_from_video(video: Video) -> Self {
let extractor_hash = video.extractor_hash.clone();
let task_handle = tokio::spawn(async move {
// FIXME: Remove this app reconstruction <2024-07-29>
let new_app = App::new().await?;
Downloader::actually_cache_video(&new_app, &video)
.await
.with_context(|| format!("Failed to cache video: '{}'", video.title))?;
Ok(())
});
Self {
task_handle,
extractor_hash,
}
}
}
pub struct Downloader {
current_download: Option<CurrentDownload>,
}
impl Downloader {
pub fn new() -> Self {
Self {
current_download: None,
}
}
/// The entry point to the Downloader.
/// This Downloader will periodically check if the database has changed, and then also
/// change which videos it downloads.
/// This will run, until the database doesn't contain any watchable videos
pub async fn consume(&mut self, app: &App) -> Result<()> {
while let Some(next_video) = get_next_uncached_video(app).await? {
if let Some(_) = &self.current_download {
let current_download = self.current_download.take().expect("Is Some");
if current_download.task_handle.is_finished() {
current_download.task_handle.await??;
continue;
}
if next_video.extractor_hash != current_download.extractor_hash {
info!(
"Noticed, that the next video is not the video being downloaded, replacing it ('{}' vs. '{}')!",
next_video.extractor_hash.into_short_hash(app).await?, current_download.extractor_hash.into_short_hash(app).await?
);
// Replace the currently downloading video
current_download.task_handle.abort();
let new_current_download = CurrentDownload::new_from_video(next_video);
self.current_download = Some(new_current_download);
} else {
debug!(
"Currently downloading '{}'",
current_download.extractor_hash.into_short_hash(app).await?
);
// Reset the taken value
self.current_download = Some(current_download);
time::sleep(Duration::new(1, 0)).await;
}
} else {
info!(
"No video is being downloaded right now, setting it to '{}'",
next_video.title
);
let new_current_download = CurrentDownload::new_from_video(next_video);
self.current_download = Some(new_current_download);
}
// if get_allocated_cache().await? < CONCURRENT {
// .cache_video(next_video).await?;
// }
}
info!("Finished downloading!");
Ok(())
}
async fn actually_cache_video(app: &App, video: &Video) -> Result<()> {
debug!("Download started: {}", &video.title);
let addional_opts = get_video_yt_dlp_opts(&app, &video.extractor_hash).await?;
let result = yt_dlp::download(&[video.url.clone()], &download_opts(addional_opts))
.await
.with_context(|| format!("Failed to download video: '{}'", video.title))?;
assert_eq!(result.len(), 1);
let result = &result[0];
set_video_cache_path(app, &video.extractor_hash, Some(&result)).await?;
info!(
"Video '{}' was downlaoded to path: {}",
video.title,
result.display()
);
Ok(())
}
}
|
