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// yt - A fully featured command line YouTube client
//
// Copyright (C) 2025 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::{
io::{Write, stderr},
sync::atomic::AtomicUsize,
};
use anyhow::{Context, Result};
use blake3::Hash;
use futures::{StreamExt, future::join_all, stream};
use log::{Level, debug, error, log_enabled};
use serde_json::json;
use tokio_util::task::LocalPoolHandle;
use yt_dlp::{InfoJson, YoutubeDLOptions, json_cast, json_get, process_ie_result};
use crate::{
ansi_escape_codes::{clear_whole_line, move_to_col},
app::App,
storage::subscriptions::Subscription,
};
use super::process_subscription;
pub(super) struct Updater {
max_backlog: usize,
hashes: Vec<Hash>,
pool: LocalPoolHandle,
}
static REACHED_NUMBER: AtomicUsize = const { AtomicUsize::new(1) };
impl Updater {
pub(super) fn new(max_backlog: usize, hashes: Vec<Hash>) -> Self {
// TODO(@bpeetz): The number should not be hardcoded. <2025-06-14>
let pool = LocalPoolHandle::new(16);
Self {
max_backlog,
hashes,
pool,
}
}
pub(super) async fn update(self, app: &App, subscriptions: Vec<Subscription>) -> Result<()> {
let total_number = subscriptions.len();
let mut stream = stream::iter(subscriptions)
.map(|sub| self.get_new_entries(sub, total_number))
.buffer_unordered(16 * 4);
while let Some(output) = stream.next().await {
let mut entries = output?;
if let Some(next) = entries.next() {
let (sub, entry) = next;
process_subscription(app, sub, entry).await?;
join_all(entries.map(|(sub, entry)| process_subscription(app, sub, entry)))
.await
.into_iter()
.collect::<Result<(), _>>()?;
}
}
Ok(())
}
async fn get_new_entries(
&self,
sub: Subscription,
total_number: usize,
) -> Result<impl Iterator<Item = (Subscription, InfoJson)>> {
let max_backlog = self.max_backlog;
let hashes = self.hashes.clone();
let yt_dlp = YoutubeDLOptions::new()
.set("playliststart", 1)
.set("playlistend", max_backlog)
.set("noplaylist", false)
.set(
"extractor_args",
json! {{"youtubetab": {"approximate_date": [""]}}},
)
// TODO: This also removes unlisted and other stuff. Find a good way to remove the
// members-only videos from the feed. <2025-04-17>
.set("match-filter", "availability=public")
.build()?;
self.pool
.spawn_pinned(move || {
async move {
if !log_enabled!(Level::Debug) {
clear_whole_line();
move_to_col(1);
eprint!(
"({}/{total_number}) Checking playlist {}...",
REACHED_NUMBER.fetch_add(1, std::sync::atomic::Ordering::Relaxed),
sub.name
);
move_to_col(1);
stderr().flush()?;
}
let info = yt_dlp
.extract_info(&sub.url, false, false)
.with_context(|| format!("Failed to get playlist '{}'.", sub.name))?;
let empty = vec![];
let entries = info
.get("entries")
.map_or(&empty, |val| json_cast!(val, as_array));
let valid_entries: Vec<(Subscription, InfoJson)> = entries
.iter()
.take(max_backlog)
.filter_map(|entry| -> Option<(Subscription, InfoJson)> {
let id = json_get!(entry, "id", as_str);
let extractor_hash = blake3::hash(id.as_bytes());
if hashes.contains(&extractor_hash) {
debug!(
"Skipping entry, as it is already present: '{extractor_hash}'",
);
None
} else {
Some((sub.clone(), json_cast!(entry, as_object).to_owned()))
}
})
.collect();
Ok(valid_entries
.into_iter()
.map(|(sub, entry)| {
let inner_yt_dlp = YoutubeDLOptions::new()
.set("noplaylist", true)
.build()
.expect("Worked before, should work now");
match inner_yt_dlp.process_ie_result(entry, false) {
Ok(output) => Ok((sub, output)),
Err(err) => Err(err),
}
})
// Don't fail the whole update, if one of the entries fails to fetch.
.filter_map(|base| match base {
Ok(ok) => Some(ok),
Err(err) => {
let process_ie_result::Error::Python(err) = &err;
if err.contains(
"Join this channel to get access to members-only content ",
) {
// Hide this error
} else {
// Show the error, but don't fail.
let error = err
.strip_prefix("DownloadError: \u{1b}[0;31mERROR:\u{1b}[0m ")
.unwrap_or(err);
error!("{error}");
}
None
}
}))
}
})
.await?
}
}
|
