local playback v1

src/core/downloads.rs

@@ -942,3 +942,57 @@ fn aria2_front_status(state: &Arc<Mutex<DownloadState>>) -> Option<String> {
     let res = aria2_rpc_call("aria2.tellStatus", json!([gid, ["status"]])).ok()?;
     res.get("status").and_then(|v| v.as_str()).map(|s| s.to_string())
 }
+
+
+/// If this item_id has a local download marker, return the local media file path.
+/// Marker files are written alongside the media file as:
+///   <media_filename>.<DOWNLOAD_MARKER_EXT>
+/// where DOWNLOAD_MARKER_EXT == "cj-jftui.json"
+pub fn local_media_path_for_item_id(item_id: &str) -> Option<PathBuf> {
+    fn walk(dir: &Path, item_id: &str) -> Option<PathBuf> {
+        if !dir.exists() {
+            return None;
+        }
+
+        let rd = fs::read_dir(dir).ok()?;
+        for ent in rd {
+            let p = ent.ok()?.path();
+
+            if p.is_dir() {
+                if let Some(found) = walk(&p, item_id) {
+                    return Some(found);
+                }
+                continue;
+            }
+
+            let name = p.file_name().and_then(|s| s.to_str()).unwrap_or("");
+            if !name.ends_with(DOWNLOAD_MARKER_EXT) {
+                continue;
+            }
+
+            let raw = fs::read_to_string(&p).ok()?;
+            let v: Value = serde_json::from_str(raw.trim()).ok()?;
+            let id = v.get("item_id").and_then(|x| x.as_str())?;
+
+            if id == item_id {
+                // Marker file is "<media_filename>.<DOWNLOAD_MARKER_EXT>"
+                // So the media file path is the same path with that suffix stripped.
+                let suffix = format!(".{DOWNLOAD_MARKER_EXT}");
+                if !name.ends_with(&suffix) {
+                    continue;
+                }
+                let media_name = &name[..name.len() - suffix.len()];
+                let media_path = p.with_file_name(media_name);
+
+                if media_path.exists() {
+                    return Some(media_path);
+                }
+            }
+        }
+
+        None
+    }
+
+    let root = downloads_root().ok()?;
+    walk(&root, item_id)
+}

src/main.rs

@@ -694,7 +694,11 @@ fn handle_key(app: &mut App, code: KeyCode) {
                 app.mpv_now_playing = Some(item_name);
 
                 // If mpv running -> replace, else spawn
-                let url = build_jellyfin_play_url(&cfg, &item_id);
+                let url = if let Some(p) = crate::core::downloads::local_media_path_for_item_id(&item_id) {
+                    p.to_string_lossy().to_string()
+                } else {
+                    build_jellyfin_play_url(&cfg, &item_id)
+                };
 
                 if let Some(mpv) = &app.mpv {
                     match mpv_load_url(&cfg, mpv, &url) {
@@ -733,7 +737,11 @@ fn handle_key(app: &mut App, code: KeyCode) {
                 app.autoplay_next_index = if selected + 1 < len { Some(selected + 1) } else { None };
 
                 // load/replace or spawn
-                let url = build_jellyfin_play_url(&cfg, &item_id);
+                let url = if let Some(p) = crate::core::downloads::local_media_path_for_item_id(&item_id) {
+                    p.to_string_lossy().to_string()
+                } else {
+                    build_jellyfin_play_url(&cfg, &item_id)
+                };
 
                 if let Some(mpv) = &app.mpv {
                     match mpv_load_url(&cfg, mpv, &url) {