feat: enhance playback controls with keyboard shortcuts for clip manipulation and audio separation

apps/web/src/hooks/use-playback-controls.ts

@@ -1,18 +1,174 @@
 import { useEffect } from "react";
 import { usePlaybackStore } from "@/stores/playback-store";
+import { useTimelineStore } from "@/stores/timeline-store";
+import { toast } from "sonner";
 
-export function usePlaybackControls() {
-  const { toggle } = usePlaybackStore();
+export const usePlaybackControls = () => {
+  const { isPlaying, currentTime, play, pause, seek } = usePlaybackStore();
+
+  const {
+    selectedClips,
+    tracks,
+    splitClip,
+    splitAndKeepLeft,
+    splitAndKeepRight,
+    separateAudio,
+  } = useTimelineStore();
 
   useEffect(() => {
-    const handleKeyDown = (e: KeyboardEvent) => {
-      if (e.code === "Space" && e.target === document.body) {
-        e.preventDefault();
-        toggle();
+    const handleKeyPress = (e: KeyboardEvent) => {
+      if (
+        e.target instanceof HTMLInputElement ||
+        e.target instanceof HTMLTextAreaElement
+      ) {
+        return;
+      }
+
+      switch (e.key) {
+        case " ":
+          e.preventDefault();
+          if (isPlaying) {
+            pause();
+          } else {
+            play();
+          }
+          break;
+
+        case "s":
+          if (e.ctrlKey || e.metaKey) {
+            e.preventDefault();
+            handleSplitSelectedClip();
+          }
+          break;
+
+        case "q":
+          if (e.ctrlKey || e.metaKey) {
+            e.preventDefault();
+            handleSplitAndKeepLeft();
+          }
+          break;
+
+        case "w":
+          if (e.ctrlKey || e.metaKey) {
+            e.preventDefault();
+            handleSplitAndKeepRight();
+          }
+          break;
+
+        case "d":
+          if (e.ctrlKey || e.metaKey) {
+            e.preventDefault();
+            handleSeparateAudio();
+          }
+          break;
       }
     };
 
-    document.addEventListener("keydown", handleKeyDown);
-    return () => document.removeEventListener("keydown", handleKeyDown);
-  }, [toggle]);
-} 
+    const handleSplitSelectedClip = () => {
+      if (selectedClips.length !== 1) {
+        toast.error("Select exactly one clip to split");
+        return;
+      }
+
+      const { trackId, clipId } = selectedClips[0];
+      const track = tracks.find((t) => t.id === trackId);
+      const clip = track?.clips.find((c) => c.id === clipId);
+
+      if (!clip) return;
+
+      const effectiveStart = clip.startTime;
+      const effectiveEnd =
+        clip.startTime + (clip.duration - clip.trimStart - clip.trimEnd);
+
+      if (currentTime <= effectiveStart || currentTime >= effectiveEnd) {
+        toast.error("Playhead must be within selected clip");
+        return;
+      }
+
+      splitClip(trackId, clipId, currentTime);
+      toast.success("Clip split at playhead");
+    };
+
+    const handleSplitAndKeepLeft = () => {
+      if (selectedClips.length !== 1) {
+        toast.error("Select exactly one clip");
+        return;
+      }
+
+      const { trackId, clipId } = selectedClips[0];
+      const track = tracks.find((t) => t.id === trackId);
+      const clip = track?.clips.find((c) => c.id === clipId);
+
+      if (!clip) return;
+
+      const effectiveStart = clip.startTime;
+      const effectiveEnd =
+        clip.startTime + (clip.duration - clip.trimStart - clip.trimEnd);
+
+      if (currentTime <= effectiveStart || currentTime >= effectiveEnd) {
+        toast.error("Playhead must be within selected clip");
+        return;
+      }
+
+      splitAndKeepLeft(trackId, clipId, currentTime);
+      toast.success("Split and kept left portion");
+    };
+
+    const handleSplitAndKeepRight = () => {
+      if (selectedClips.length !== 1) {
+        toast.error("Select exactly one clip");
+        return;
+      }
+
+      const { trackId, clipId } = selectedClips[0];
+      const track = tracks.find((t) => t.id === trackId);
+      const clip = track?.clips.find((c) => c.id === clipId);
+
+      if (!clip) return;
+
+      const effectiveStart = clip.startTime;
+      const effectiveEnd =
+        clip.startTime + (clip.duration - clip.trimStart - clip.trimEnd);
+
+      if (currentTime <= effectiveStart || currentTime >= effectiveEnd) {
+        toast.error("Playhead must be within selected clip");
+        return;
+      }
+
+      splitAndKeepRight(trackId, clipId, currentTime);
+      toast.success("Split and kept right portion");
+    };
+
+    const handleSeparateAudio = () => {
+      if (selectedClips.length !== 1) {
+        toast.error("Select exactly one video clip to separate audio");
+        return;
+      }
+
+      const { trackId, clipId } = selectedClips[0];
+      const track = tracks.find((t) => t.id === trackId);
+
+      if (!track || track.type !== "video") {
+        toast.error("Select a video clip to separate audio");
+        return;
+      }
+
+      separateAudio(trackId, clipId);
+      toast.success("Audio separated to audio track");
+    };
+
+    document.addEventListener("keydown", handleKeyPress);
+    return () => document.removeEventListener("keydown", handleKeyPress);
+  }, [
+    isPlaying,
+    currentTime,
+    selectedClips,
+    tracks,
+    play,
+    pause,
+    splitClip,
+    splitAndKeepLeft,
+    splitAndKeepRight,
+    separateAudio,
+  ]);
+};