1 files changed, 131 insertions, 0 deletions
diff --git a/logic/src/assets.rs b/logic/src/assets.rs
new file mode 100644
index 0000000..7be3845
--- /dev/null
+++ b/logic/src/assets.rs
@@ -0,0 +1,131 @@
+/*
+    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) 2025 metamuffin <metamuffin.org>
+*/
+
+use crate::{DATABASE, session::Session};
+use anyhow::{Result, anyhow};
+use jellycommon::{Asset, LocalTrack, NodeID, PeopleGroup, SourceTrackKind, TrackSource};
+use jellyimport_asset_token::AssetInner;
+
+pub fn get_node_backdrop(_session: &Session, id: NodeID) -> Result<Asset> {
+    // TODO perm
+    let node = DATABASE
+        .get_node(id)?
+        .ok_or(anyhow!("node does not exist"))?;
+
+    let mut asset = node.backdrop.clone();
+    if asset.is_none() {
+        if let Some(parent) = node.parents.last().copied() {
+            let parent = DATABASE
+                .get_node(parent)?
+                .ok_or(anyhow!("node does not exist"))?;
+            asset = parent.backdrop.clone();
+        }
+    };
+    Ok(asset.unwrap_or_else(|| {
+        AssetInner::Assets(format!("fallback-{:?}.avif", node.kind).into()).ser()
+    }))
+}
+pub fn get_node_poster(_session: &Session, id: NodeID) -> Result<Asset> {
+    // TODO perm
+    let node = DATABASE
+        .get_node(id)?
+        .ok_or(anyhow!("node does not exist"))?;
+
+    let mut asset = node.poster.clone();
+    if asset.is_none() {
+        if let Some(parent) = node.parents.last().copied() {
+            let parent = DATABASE
+                .get_node(parent)?
+                .ok_or(anyhow!("node does not exist"))?;
+            asset = parent.poster.clone();
+        }
+    };
+    Ok(asset.unwrap_or_else(|| {
+        AssetInner::Assets(format!("fallback-{:?}.avif", node.kind).into()).ser()
+    }))
+}
+
+pub fn get_node_person_asset(
+    _session: &Session,
+    id: NodeID,
+    group: PeopleGroup,
+    index: usize,
+) -> Result<Asset> {
+    // TODO perm
+
+    let node = DATABASE
+        .get_node(id)?
+        .ok_or(anyhow!("node does not exist"))?;
+    let app = node
+        .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("fallback-Person.avif".into()).ser());
+
+    Ok(asset)
+}
+
+pub async fn get_node_thumbnail(_session: &Session, id: NodeID, t: f64) -> Result<Asset> {
+    let node = DATABASE
+        .get_node(id)?
+        .ok_or(anyhow!("node does not exist"))?;
+
+    let media = node.media.as_ref().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 = media
+        .tracks
+        .get(thumb_track_index)
+        .ok_or(anyhow!("no source"))?;
+    let thumb_track_source = source.source.clone();
+
+    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(a) => {
+            let AssetInner::LocalTrack(LocalTrack { path, .. }) = AssetInner::deser(&a.0)? else {
+                return Err(anyhow!("track set to wrong asset type").into());
+            };
+            // 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.0, t as i64), |out| {
+            //     session.node_thumbnail(out, id.0.into(), 2048, t)
+            // })
+            // .await?
+            todo!()
+        }
+    };
+
+    Ok(AssetInner::Cache(asset).ser())
+}