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authorBenedikt Peetz <benedikt.peetz@b-peetz.de>2024-10-14 14:56:29 +0200
committerBenedikt Peetz <benedikt.peetz@b-peetz.de>2024-10-14 14:56:29 +0200
commit6c9286857ef8b314962b67f4a16a66e8c35531bc (patch)
tree9ced4485ec38b39f82cba258c06321a21c40000a /src/download/mod.rs
parentbuild(Cargo.toml): Add further lints (diff)
downloadyt-6c9286857ef8b314962b67f4a16a66e8c35531bc.tar.gz
yt-6c9286857ef8b314962b67f4a16a66e8c35531bc.zip
refactor(treewide): Combine the separate crates in one workspace
Diffstat (limited to 'src/download/mod.rs')
-rw-r--r--src/download/mod.rs303
1 files changed, 0 insertions, 303 deletions
diff --git a/src/download/mod.rs b/src/download/mod.rs
deleted file mode 100644
index 56910f9..0000000
--- a/src/download/mod.rs
+++ /dev/null
@@ -1,303 +0,0 @@
-// 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::{collections::HashMap, str::FromStr, sync::Arc, 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, YtDlpOptions,
-    },
-};
-
-use anyhow::{bail, Context, Result};
-use bytes::Bytes;
-use futures::{future::BoxFuture, FutureExt};
-use log::{debug, error, info, warn};
-use tokio::{fs, task::JoinHandle, time};
-
-pub mod download_options;
-
-#[derive(Debug)]
-pub struct CurrentDownload {
-    task_handle: JoinHandle<Result<()>>,
-    extractor_hash: ExtractorHash,
-}
-
-impl CurrentDownload {
-    fn new_from_video(app: Arc<App>, video: Video) -> Self {
-        let extractor_hash = video.extractor_hash.clone();
-
-        let task_handle = tokio::spawn(async move {
-            Downloader::actually_cache_video(&app, &video)
-                .await
-                .with_context(|| format!("Failed to cache video: '{}'", video.title))?;
-            Ok(())
-        });
-
-        Self {
-            task_handle,
-            extractor_hash,
-        }
-    }
-}
-
-enum CacheSizeCheck {
-    /// The video can be downloaded
-    Fits,
-
-    /// The video and the current cache size together would exceed the size
-    TooLarge,
-
-    /// The video would not even fit into the empty cache
-    ExceedsMaxCacheSize,
-}
-
-pub struct Downloader {
-    current_download: Option<CurrentDownload>,
-    video_size_cache: HashMap<ExtractorHash, u64>,
-    printed_warning: bool,
-    cached_cache_allocation: Option<u64>,
-}
-
-impl Default for Downloader {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-impl Downloader {
-    pub fn new() -> Self {
-        Self {
-            current_download: None,
-            video_size_cache: HashMap::new(),
-            printed_warning: false,
-            cached_cache_allocation: None,
-        }
-    }
-
-    /// Check if enough cache is available. Will wait for 10s if it's not.
-    async fn is_enough_cache_available(
-        &mut self,
-        app: &App,
-        max_cache_size: u64,
-        next_video: &Video,
-    ) -> Result<CacheSizeCheck> {
-        if let Some(cdownload) = &self.current_download {
-            if cdownload.extractor_hash == next_video.extractor_hash {
-                // If the video is already being downloaded it will always fit. Otherwise the
-                // download would not have been started.
-                return Ok(CacheSizeCheck::Fits);
-            }
-        }
-        let cache_allocation = Self::get_current_cache_allocation(app).await?;
-        let video_size = self.get_approx_video_size(app, next_video).await?;
-
-        if video_size >= max_cache_size {
-            error!(
-                "The video '{}' ({}) exceeds the maximum cache size ({})! \
-                 Please set a bigger maximum (`--max-cache-size`) or skip it.",
-                next_video.title,
-                Bytes::new(video_size),
-                Bytes::new(max_cache_size)
-            );
-
-            return Ok(CacheSizeCheck::ExceedsMaxCacheSize);
-        }
-
-        if cache_allocation + video_size >= max_cache_size {
-            if !self.printed_warning {
-                warn!(
-                    "Can't download video: '{}' ({}) as it's too large for the cache ({} of {} allocated). \
-                     Waiting for cache size reduction..",
-                    next_video.title, Bytes::new(video_size), Bytes::new(cache_allocation), Bytes::new(max_cache_size)
-                    );
-                self.printed_warning = true;
-                self.cached_cache_allocation = Some(cache_allocation);
-            }
-            if let Some(cca) = self.cached_cache_allocation {
-                if cca != cache_allocation {
-                    warn!(
-                        "Current cache size has changed, it's now: '{}'",
-                        Bytes::new(cache_allocation)
-                    );
-                    self.cached_cache_allocation = Some(cache_allocation);
-                }
-            } else {
-                info!(
-                    "Current cache size allocation: '{}'",
-                    Bytes::new(cache_allocation)
-                );
-                self.cached_cache_allocation = Some(cache_allocation);
-            }
-
-            // Wait and hope, that a large video is deleted from the cache.
-            time::sleep(Duration::from_secs(10)).await;
-            Ok(CacheSizeCheck::TooLarge)
-        } else {
-            self.printed_warning = false;
-            Ok(CacheSizeCheck::Fits)
-        }
-    }
-
-    /// 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: Arc<App>, max_cache_size: u64) -> Result<()> {
-        while let Some(next_video) = get_next_uncached_video(&app).await? {
-            match self
-                .is_enough_cache_available(&app, max_cache_size, &next_video)
-                .await?
-            {
-                CacheSizeCheck::Fits => (),
-                CacheSizeCheck::TooLarge => continue,
-                CacheSizeCheck::ExceedsMaxCacheSize => bail!("Giving up."),
-            };
-
-            if self.current_download.is_some() {
-                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(Arc::clone(&app), next_video);
-
-                    self.current_download = Some(new_current_download);
-                } else {
-                    // Reset the taken value
-                    self.current_download = Some(current_download);
-                }
-            } else {
-                info!(
-                    "No video is being downloaded right now, setting it to '{}'",
-                    next_video.title
-                );
-                let new_current_download =
-                    CurrentDownload::new_from_video(Arc::clone(&app), next_video);
-                self.current_download = Some(new_current_download);
-            }
-
-            time::sleep(Duration::new(1, 0)).await;
-        }
-
-        info!("Finished downloading!");
-        Ok(())
-    }
-
-    pub async fn get_current_cache_allocation(app: &App) -> Result<u64> {
-        fn dir_size(mut dir: fs::ReadDir) -> BoxFuture<'static, Result<u64>> {
-            async move {
-                let mut acc = 0;
-                while let Some(entry) = dir.next_entry().await? {
-                    let size = match entry.metadata().await? {
-                        data if data.is_dir() => {
-                            let path = entry.path();
-                            let read_dir = fs::read_dir(path).await?;
-
-                            dir_size(read_dir).await?
-                        }
-                        data => data.len(),
-                    };
-                    acc += size;
-                }
-                Ok(acc)
-            }
-            .boxed()
-        }
-
-        dir_size(fs::read_dir(&app.config.paths.download_dir).await?).await
-    }
-
-    async fn get_approx_video_size(&mut self, app: &App, video: &Video) -> Result<u64> {
-        if let Some(value) = self.video_size_cache.get(&video.extractor_hash) {
-            Ok(*value)
-        } else {
-            // the subtitle file size should be negligible
-            let add_opts = YtDlpOptions {
-                subtitle_langs: "".to_owned(),
-            };
-            let opts = &download_opts(app, add_opts);
-
-            let result = yt_dlp::extract_info(opts, &video.url, false, true)
-                .await
-                .with_context(|| {
-                    format!("Failed to extract video information: '{}'", video.title)
-                })?;
-
-            let size = if let Some(val) = result.filesize {
-                val
-            } else if let Some(val) = result.filesize_approx {
-                val
-            } else if result.duration.is_some() && result.tbr.is_some() {
-                let duration = result.duration.expect("Is some").ceil() as u64;
-
-                // TODO: yt_dlp gets this from the format
-                let tbr = result.tbr.expect("Is Some").ceil() as u64;
-
-                duration * tbr * (1000 / 8)
-            } else {
-                let hardcoded_default = Bytes::from_str("250 MiB").expect("This is hardcoded");
-                error!(
-                    "Failed to find a filesize for video: '{}' (Using hardcoded value of {})",
-                    video.title, hardcoded_default
-                );
-                hardcoded_default.as_u64()
-            };
-
-            assert_eq!(
-                self.video_size_cache
-                    .insert(video.extractor_hash.clone(), size),
-                None
-            );
-
-            Ok(size)
-        }
-    }
-
-    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(app, 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(())
-    }
-}