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/*
This file is part of jellything (https://codeberg.org/metamuffin/jellything)
which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
Copyright (C) 2023 metamuffin <metamuffin.org>
*/
use crate::{
database::DataAcid,
routes::ui::{account::session::Session, error::MyResult, CacheControlFile},
};
use anyhow::{anyhow, Context};
use jellybase::{
cache::async_cache_file,
database::{TableExt, T_NODE, T_NODE_EXTENDED},
federation::Federation,
permission::NodePermissionExt,
AssetLocationExt,
};
pub use jellycommon::AssetRole;
use jellycommon::{AssetLocation, LocalTrack, PeopleGroup, SourceTrackKind, TrackSource};
use log::info;
use rocket::{get, http::ContentType, State};
#[get("/n/<id>/asset?<role>&<width>")]
pub async fn r_item_assets(
session: Session,
db: &State<DataAcid>,
id: &str,
role: AssetRole,
width: Option<usize>,
) -> MyResult<(ContentType, CacheControlFile)> {
let node = T_NODE
.get(&db, id)?
.only_if_permitted(&session.user.permissions)
.ok_or(anyhow!("node does not exist"))?;
let mut asset = match role {
AssetRole::Backdrop => node.private.backdrop,
AssetRole::Poster => node.private.poster,
};
if let None = asset {
if let Some(parent) = &node.public.path.last() {
let parent = T_NODE
.get(&db, parent.as_str())?
.ok_or(anyhow!("node does not exist"))?;
asset = match role {
AssetRole::Backdrop => parent.private.backdrop,
AssetRole::Poster => parent.private.poster,
};
}
};
let asset = asset.unwrap_or(AssetLocation::Assets(
format!("fallback-{:?}.avif", node.public.kind.unwrap_or_default()).into(),
));
Ok(asset_with_res(asset, width).await?)
}
#[get("/n/<id>/person/<index>/asset?<group>&<width>")]
pub async fn r_person_asset(
session: Session,
db: &State<DataAcid>,
id: &str,
index: usize,
group: PeopleGroup,
width: Option<usize>,
) -> MyResult<(ContentType, CacheControlFile)> {
T_NODE
.get(&db, id)?
.only_if_permitted(&session.user.permissions)
.ok_or(anyhow!("node does not exist"))?;
let ext = T_NODE_EXTENDED.get(db, id)?.unwrap_or_default();
let app = ext
.people
.get(&group)
.ok_or(anyhow!("group has no members"))?
.get(index)
.ok_or(anyhow!("person does not exist"))?;
let asset = app.person.asset.to_owned().unwrap_or(AssetLocation::Assets(
format!("fallback-Person.avif").into(),
));
Ok(asset_with_res(asset, width).await?)
}
// TODO this can create "federation recursion" because track selection cannot be relied on.
#[get("/n/<id>/thumbnail?<t>&<width>")]
pub async fn r_node_thumbnail(
session: Session,
db: &State<DataAcid>,
fed: &State<Federation>,
id: &str,
t: f64,
width: Option<usize>,
) -> MyResult<(ContentType, CacheControlFile)> {
let node = T_NODE
.get(&db, id)?
.only_if_permitted(&session.user.permissions)
.ok_or(anyhow!("node does not exist"))?;
let media = node.public.media.ok_or(anyhow!("no media"))?;
let (thumb_track_index, thumb_track) = media
.tracks
.iter()
.enumerate()
.find(|(_i, t)| matches!(t.kind, SourceTrackKind::Video { .. }))
.ok_or(anyhow!("no video track to create a thumbnail of"))?;
let source = node.private.source.ok_or(anyhow!("no source"))?;
let thumb_track_source = &source[thumb_track_index];
if t < 0. || t > media.duration {
Err(anyhow!("thumbnail instant not within media duration"))?
}
let step = 8.;
let t = (t / step).floor() * step;
let asset = match thumb_track_source {
TrackSource::Local(LocalTrack { path, .. }) => {
// the track selected might be different from thumb_track
jellytranscoder::thumbnail::create_thumbnail(path, t).await?
}
TrackSource::Remote(_) => {
let session = fed
.get_session(
thumb_track
.federated
.last()
.ok_or(anyhow!("federation broken"))?,
)
.await?;
async_cache_file(&["fed-thumb", id, &format!("{t}")], |out| {
session.node_thumbnail(out, id, 2048, t)
})
.await?
}
};
Ok(asset_with_res(asset, width).await?)
}
async fn asset_with_res(
asset: AssetLocation,
width: Option<usize>,
) -> MyResult<(ContentType, CacheControlFile)> {
// fit the resolution into a finite set so the maximum cache is finite too.
let width = 2usize.pow(width.unwrap_or(2048).clamp(128, 2048).ilog2());
let path = jellytranscoder::image::transcode(asset, 50., 5, width)
.await
.context("transcoding asset")?;
info!("loading asset from {path:?}");
Ok((
ContentType::AVIF,
CacheControlFile::new_cachekey(&path.path()).await?,
))
}
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