From e5358c7cffe3dfe66451c9a405cf4d7430ea2d65 Mon Sep 17 00:00:00 2001
From: Matthew Stratford <hi@mstratford.net>
Date: Tue, 5 Jan 2021 23:41:14 +0000
Subject: [PATCH] Automate play on PFL and disable on fader.

---
 src/mixer/state.ts | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/mixer/state.ts b/src/mixer/state.ts
index af2141e..f0637b3 100644
--- a/src/mixer/state.ts
+++ b/src/mixer/state.ts
@@ -663,7 +663,8 @@ export const { setTracklistItemID } = mixerState.actions;
 const FADE_TIME_SECONDS = 1;
 export const setVolume = (
   player: number,
-  level: VolumePresetEnum
+  level: VolumePresetEnum,
+  fade: boolean = true
 ): AppThunk => (dispatch, getState) => {
   let volume: number;
   let uiLevel: number;
@@ -701,6 +702,18 @@ export const setVolume = (
     }
   }
 
+  // If we're fading up the volume, disable the PFL.
+  if (level !== "off") {
+    dispatch(setChannelPFL(player, false));
+  }
+
+  // If not fading, just do it.
+  if (!fade) {
+    dispatch(mixerState.actions.setPlayerVolume({ player, volume: uiLevel }));
+    dispatch(mixerState.actions.setPlayerGain({ player, gain: volume }));
+    return;
+  }
+
   const state = getState().mixer.players[player];
 
   const currentLevel = state.volume;
@@ -747,6 +760,12 @@ export const setChannelPFL = (
   player: number,
   enabled: boolean
 ): AppThunk => async (dispatch) => {
+  if (typeof audioEngine.players[player] !== "undefined") {
+    if (!audioEngine.players[player]?.isPlaying) {
+      dispatch(setVolume(player, "off", false));
+      dispatch(play(player));
+    }
+  }
   dispatch(mixerState.actions.setPlayerPFL({ player, enabled }));
   audioEngine.setPFL(player, enabled);
 };