feat(favorites): per-favorite volume persistence (narrowed to favorited stations only); update Station and Favorites with Volume support and wiring in TUI

internal/data/favorites.go

@@ -146,6 +146,35 @@ func (f *Favorites) List() []radio.Station {
 	return out
 }
 
+// SetVolume sets the preferred volume for a favorited station (by URL).
+// Does nothing if the station is not currently favorited. Marks dirty.
+func (f *Favorites) SetVolume(url string, vol int) {
+	if vol < 0 {
+		vol = 0
+	}
+	if vol > 100 {
+		vol = 100
+	}
+	f.mu.Lock()
+	defer f.mu.Unlock()
+	if s, ok := f.stations[url]; ok {
+		s.Volume = vol
+		f.stations[url] = s
+		f.dirty = true
+	}
+}
+
+// GetVolume returns the preferred volume for a favorited station, or 0 if none set
+// or the station is not favorited.
+func (f *Favorites) GetVolume(url string) int {
+	f.mu.RLock()
+	defer f.mu.RUnlock()
+	if s, ok := f.stations[url]; ok {
+		return s.Volume
+	}
+	return 0
+}
+
 // Path returns the JSON file location (for diagnostics / "config path" style cmds).
 func (f *Favorites) Path() string {
 	return f.path

internal/radio/radio.go

@@ -25,6 +25,7 @@ type Station struct {
 	Tags        string      `json:"tags"`
 	Url         string      `json:"url"`
 	Lastcheck   int         `json:"lastcheckok"`
+	Volume      int         `json:"volume,omitempty"` // per-favorite preferred volume (0 = use global)
 	// Future: UUID string `json:"stationuuid"` etc for stable favorites.
 }
 

internal/ui/ui.go

@@ -227,6 +227,12 @@ func (a *App) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 					_ = a.player.Stop()
 				}
 				config.SetLastVolume(a.currentVolume)
+				if a.favs != nil && a.playingItem.station.Url != "" {
+					if a.favs.Contains(a.playingItem.station.Url) {
+						a.favs.SetVolume(a.playingItem.station.Url, a.currentVolume)
+						_ = a.favs.Save()
+					}
+				}
 				a.quitting = true
 				return a, tea.Quit
 			case "s", "S", "x", "X":
@@ -304,6 +310,13 @@ func (a *App) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 					// Save immediately on user action so it is persisted even if
 					// the user stops playback before the next poll.
 					config.SetLastVolume(a.currentVolume)
+					// If this is a favorited station, also persist the per-station volume.
+					if a.favs != nil && a.playingItem.station.Url != "" {
+						if a.favs.Contains(a.playingItem.station.Url) {
+							a.favs.SetVolume(a.playingItem.station.Url, a.currentVolume)
+							_ = a.favs.Save()
+						}
+					}
 					// Schedule a message to clear the flash highlight shortly after.
 					clearCmd := tea.Tick(140*time.Millisecond, func(t time.Time) tea.Msg {
 						return clearVolFlashMsg{up: isUp}
@@ -339,14 +352,23 @@ func (a *App) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 				a.nowPlaying = i.station.Name
 				a.paused = false
 				a.muted = false
-				// Prefer live currentVolume from previous playback in this session
+				// Priority for volume when starting a station:
-			// (so volume is sticky across s/x + new station).
+			// 1. Per-favorite saved volume (if this station is in favorites and has one).
-			// Fall back to the persisted last volume from the ini only if we
+			// 2. Live session currentVolume (stickiness across s/x for non-favorites or
-			// haven't played anything yet in this run.
+			//    favorites that don't have their own saved volume yet).
-			if a.currentVolume == 0 {
+			// 3. Global last volume from the ini.
-				a.currentVolume = config.LastVolume()
+			desired := config.LastVolume()
+			if a.favs != nil {
+				if v := a.favs.GetVolume(i.station.Url); v > 0 {
+					desired = v
 				}
-			desired := a.currentVolume
+			}
+			if a.currentVolume > 0 && desired == config.LastVolume() {
+				// Only fall back to live session value if we didn't have a specific
+				// per-favorite preference for this station.
+				desired = a.currentVolume
+			}
+			a.currentVolume = desired
 
 			if a.player != nil {
 				// Pass the desired volume as an extra arg for this specific
@@ -380,7 +402,13 @@ func (a *App) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 				if wasFav {
 					a.favs.Remove(url)
 				} else {
-					a.favs.Add(sel.station)
+					toAdd := sel.station
+					// If we're adding a station we recently played (or are playing),
+					// capture the current volume so it becomes the per-favorite default.
+					if a.currentVolume > 0 && toAdd.Url == a.playingItem.station.Url {
+						toAdd.Volume = a.currentVolume
+					}
+					a.favs.Add(toAdd)
 				}
 				if saveErr := a.favs.Save(); saveErr != nil {
 					statusCmd := a.list.NewStatusMessage("Failed to save favorites: " + saveErr.Error())
@@ -437,6 +465,13 @@ func (a *App) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 				// file on every 600ms poll tick.
 				config.SetLastVolume(a.currentVolume)
 			}
+			// If playing a favorited station, persist its per-station volume too.
+			if a.favs != nil && a.playingItem.station.Url != "" {
+				if a.favs.Contains(a.playingItem.station.Url) {
+					a.favs.SetVolume(a.playingItem.station.Url, a.currentVolume)
+					_ = a.favs.Save()
+				}
+			}
 		}
 		if a.playing && a.player != nil {
 			return a, volumePollCmd(a.player)
@@ -457,9 +492,15 @@ func (a *App) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		}
 		return a, nil
 	case stopPlaybackMsg:
-		// Save the current volume on explicit stop (in addition to the
+		// Save the current volume on explicit stop for both global and (if favorite)
-		// saves on every change) for belt-and-suspenders.
+		// per-station.
 		config.SetLastVolume(a.currentVolume)
+		if a.favs != nil && a.playingItem.station.Url != "" {
+			if a.favs.Contains(a.playingItem.station.Url) {
+				a.favs.SetVolume(a.playingItem.station.Url, a.currentVolume)
+				_ = a.favs.Save()
+			}
+		}
 		// Perform the delayed transition out of playback now that the
 		// stop button flash has been visible.
 		a.playing = false

todo/queued/per-station-volume.md

@@ -1,45 +1,48 @@
-# Per-station volume savings
+# Per-station volume savings (favorites only)
 
-**Description**: Persist the last-used volume level on a per-station basis (keyed by stream URL), so that returning to a favorite or previously-played station restores the volume the user last set for *that specific station*, rather than always falling back to the global last-volume.
+**Description**: Persist the last-used volume level *only for stations in your favorites list* (keyed by stream URL). When you return to a favorited station, it restores the volume you last set for *that specific station* (falling back to the global last-volume if none saved for it). Non-favorited stations always use the global last-volume.
 
 ## Problem It Solves
 
-Currently only a single global `player.last_volume` is saved in `radiostations.ini`. When a user fine-tunes the volume while listening to Station A (e.g. to 35), stops, then plays Station B, the volume is reset to whatever was last saved globally (or the default 70). Users have to re-adjust the volume every time they switch stations.
+Currently only a single global `player.last_volume` is saved in `radiostations.ini`. When a user fine-tunes the volume while listening to a favorited Station A (e.g. to 35), stops, then plays another favorited Station B, the volume resets to the global value (or default 70). Users have to re-adjust every time they switch between their own favorites. We deliberately limit this to favorited stations only (no unbounded per-station data for the entire radio-browser corpus).
 
 ## Benefits
 
-- **Natural UX**: Volume preference is station-specific (a quiet classical station vs. a loud rock station).
+- **Natural UX**: Volume preference is specific to your favorited stations (e.g. a quiet classical vs. a loud rock station).
-- **Seamless resumption**: Pick a favorite → volume is already where you left it.
+- **Seamless resumption**: Pick a favorite from your list → volume is already where you left it for *that* station.
-- **Low friction**: No extra UI; the existing volume controls + persistence just become smarter.
+- **Low friction**: No extra UI; the existing volume controls + persistence just become smarter for your own list.
-- **Backward compatible**: Falls back to global last-volume when no per-station entry exists.
+- **Backward compatible**: Non-favorites always use global last-volume. Falls back gracefully.
-- **Leverages existing patterns**: Same atomic JSON storage + XDG path as `favorites.json`.
+- **Leverages existing patterns**: Volumes live inside the favorites data (no new file or unbounded store). Same atomic JSON + XDG path.
 
 ## High-Level Implementation
 
-1. **New data store** (`internal/data/volumes.go`):
+1. **Extend the existing Favorites store** (no new file needed):
-   - `type Volumes struct { ... }` (map[url]volume, mutex, dirty flag, path to `volumes.json`).
+   - Add `Volume int `json:"volume,omitempty"`` field to `radio.Station`.
-   - `NewVolumes()`, `Load()`, `Save()` (exact same atomic tmp+rename pattern as Favorites).
+   - Add `SetVolume(url string, vol int)` and `GetVolume(url string) int` to `*data.Favorites`.
-   - `Get(url string) (int, bool)`, `Set(url string, vol int)`, `Remove(url string)`.
+   - When `Add`ing or updating a favorite while a volume is active, capture it on the station.
+   - Volumes are automatically persisted inside `favorites.json` (only for stations you have favorited).
+   - `Remove` naturally drops the volume data for that station.
 
-2. **Wire into TUI / playback start** (in `internal/ui/ui.go`):
+2. **Wire into TUI / playback** (in `internal/ui/ui.go`):
-   - On entering playback for a station:
+   - On entering playback for a station (Enter in list):
-     - `if vol, ok := volumes.Get(station.Url); ok { desired = vol } else { desired = config.LastVolume() }`
+     - `desired := config.LastVolume()`
-     - Pass `desired` as `--volume=...` extra arg (or call a new `player.SetVolume(desired)` once IPC is ready).
+     - `if v := a.favs.GetVolume(station.Url); v > 0 { desired = v }`
-   - On every volume change (in `volumeMsg` handler or on keypress):
+     - Prefer live `a.currentVolume` for session stickiness across s/x within the same run.
-     - `volumes.Set(currentStation.Url, newVol)`
+     - Pass `desired` via `--volume=...` extra arg to `Play()`.
-     - `volumes.Save()` (or mark dirty and save on stop/quit for batching).
+   - On volume change (key handler and `volumeMsg`):
-   - On `s`/`x` stop or app quit: ensure pending volume for the current station is saved.
+     - After updating `currentVolume`, if the current station's URL is in favorites: `a.favs.SetVolume(url, currentVolume)` and `Save()`.
+     - Always still call `config.SetLastVolume` for the global fallback.
+   - On `s`/`x` stop or quit: ensure the current station's per-fav volume (if any) is saved via `favs.SetVolume` + `Save()`.
 
-3. **Player interface extension** (optional but clean):
+3. **Player interface**:
-   - Add `SetVolume(v int) error` to `Player` interface.
+   - No new methods required for basic functionality (we pass `--volume` on `Play`).
-   - `mpvPlayer` implements it with `set_property volume X` + local cache update.
+   - (Optional future) Add `SetVolume` for runtime adjustment after start.
-   - `legacyPlayer` is a no-op (or could try command-line args on next Play).
 
-4. **Config / init**:
+4. **Scope is deliberately narrow**:
-   - Load volumes in `NewApp()` or lazily when first needed (same as favorites).
+   - Only stations that exist in the user's favorites list get per-station volumes.
-   - On station removal from favorites (if desired): optionally prune the volume entry.
+   - No unbounded storage for the entire radio-browser catalog.
-
+   - When you unfavorite a station, its volume preference is dropped.
-5. **Persistence file**: `~/.config/gostations/volumes.json` (array of `{url, volume}` or map for simplicity).
+   - Non-favorites always use global `last_volume` (or 70).
 
 ## Flags / Config
 
@@ -49,23 +52,23 @@ Currently only a single global `player.last_volume` is saved in `radiostations.i
 
 ## Implementation Notes
 
-- **Key choice**: Use the station's `Url` (same as Favorites). Stable enough for the use-case.
+- **Key choice**: Use the station's `Url` (same as Favorites). Volumes only exist for stations the user has explicitly favorited.
-- **When to persist**: Save on every change (cheap) or only on stop/quit. Current global volume already saves on change; we can do the same for per-station or batch on exit.
+- **When to persist**: Save on volume change for the favorite (immediate, like global), plus on stop/quit. Non-favorites never create per-station entries.
-- **mpv timing**: The `--volume=XX` extra arg passed to `Play()` is the simplest reliable way (command-line wins). IPC `set_property` after connect is a good fallback/override.
+- **mpv timing**: The `--volume=XX` extra arg passed to `Play()` is the simplest reliable way (command-line wins for the launch of that station).
-- **Legacy player**: Per-station volumes will be ignored for now (documented limitation).
+- **Legacy player**: Per-station volumes are ignored (documented limitation).
-- **First-time migration**: Existing global last-volume becomes the fallback; no automatic per-station entries are created until user actually changes volume on a station.
+- **First-time migration**: Existing global last-volume is the fallback. No per-station entries until the user actually changes volume while playing a favorite.
-- **Tests**: Add to `stations_test.go` or new `volumes_test.go`; mock the volumes store.
+- **Tests**: Extend existing favorites tests and playback tests.
-- **Effort**: Medium (~200-300 LOC new + wiring). Mostly data layer + 3-4 call sites in the TUI.
+- **Effort**: Low-to-medium. Reuses the Favorites store and persistence; mostly wiring in the TUI playback entry and volume handlers. No new files.
 
 ## ROI
 
-**High**. Volume is one of the most frequently adjusted controls in a radio player. Making it "stick" per station removes a constant micro-friction and makes the TUI feel more thoughtful and polished.
+**High**. Volume is one of the most frequently adjusted controls. Making it "stick" for the stations *you actually care about* (your favorites) removes friction without the complexity of tracking every station ever played.
 
 | Stage | Covered |
 |-------|---------|
-| Global last-volume | ✓ (already shipped in 2.1) |
+| Global last-volume | ✓ (already shipped) |
-| Per-station | **new** |
+| Per-favorite volume | **new** (narrowed scope) |
-| Favorites | ✓ (existing) |
+| Favorites integration | ✓ (reuses existing store) |
 | TUI playback | ✓ |
 
 Users will notice it immediately the second time they return to a station they previously tuned.