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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) 2024 metamuffin <metamuffin.org>
*/
use crate::routes::ui::{account::session::Session, error::MyResult, CacheControlFile};
use anyhow::{anyhow, Context};
use base64::Engine;
use jellybase::{
assetfed::AssetInner,
cache::async_cache_file,
database::{DataAcid, TableExt, T_NODE, T_NODE_EXTENDED},
federation::Federation,
permission::NodePermissionExt,
CONF,
};
pub use jellycommon::AssetRole;
use jellycommon::{LocalTrack, PeopleGroup, SourceTrackKind, TrackSource};
use log::info;
use rocket::{get, http::ContentType, response::Redirect, State};
use std::path::PathBuf;
#[get("/asset/<token>?<width>")]
pub async fn r_asset(
_session: Session,
fed: &State<Federation>,
token: &str,
width: Option<usize>,
) -> MyResult<(ContentType, CacheControlFile)> {
let asset = AssetInner::deser(token)?;
let source = resolve_asset(asset, fed).await.context("resolving asset")?;
// 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());
// TODO configure avif quality and speed.
let path = jellytranscoder::image::transcode(source, 50., 5, width)
.await
.context("transcoding asset")?;
info!("loading asset from {path:?}");
Ok((
ContentType::AVIF,
CacheControlFile::new_cachekey(&path.abs()).await?,
))
}
pub async fn resolve_asset(asset: AssetInner, fed: &State<Federation>) -> anyhow::Result<PathBuf> {
match asset {
AssetInner::Federated { host, asset } => {
let session = fed.get_session(&host).await?;
let asset = base64::engine::general_purpose::URL_SAFE.encode(asset);
Ok(async_cache_file(&["fed-asset", &asset], |out| async {
session.asset(out, &asset, 2048).await
})
.await?
.abs())
}
AssetInner::Cache(c) => Ok(c.abs()),
AssetInner::Assets(c) => Ok(CONF.asset_path.join(c)),
AssetInner::Library(c) => Ok(CONF.library_path.join(c)),
}
}
#[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<Redirect> {
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.public.backdrop,
AssetRole::Poster => node.public.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.public.backdrop,
AssetRole::Poster => parent.public.poster,
};
}
};
let asset = asset.unwrap_or_else(|| {
AssetInner::Assets(
format!("fallback-{:?}.avif", node.public.kind.unwrap_or_default()).into(),
)
.ser()
});
Ok(Redirect::temporary(rocket::uri!(r_asset(asset.0, width))))
}
#[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<Redirect> {
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
.headshot
.to_owned()
.unwrap_or(AssetInner::Assets(format!("fallback-Person.avif").into()).ser());
Ok(Redirect::temporary(rocket::uri!(r_asset(asset.0, width))))
}
// TODO this can create "federation recursion" because track selection cannot be relied on.
//? TODO is this still relevant?
#[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<Redirect> {
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(_) => {
// TODO in the new system this is preferrably a property of node ext for regular fed
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(Redirect::temporary(rocket::uri!(r_asset(
AssetInner::Cache(asset).ser().0,
width
))))
}
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