Cleaning the codebase

src/lib/utils/keyboard.ts

@@ -0,0 +1,54 @@
+export interface KeyboardActions {
+  onMutate?: () => void;
+  onRandom?: () => void;
+  onProcess?: () => void;
+  onDownload?: () => void;
+  onDurationDecrease?: (large: boolean) => void;
+  onDurationIncrease?: (large: boolean) => void;
+  onVolumeDecrease?: (large: boolean) => void;
+  onVolumeIncrease?: (large: boolean) => void;
+  onEscape?: () => void;
+}
+
+export function createKeyboardHandler(actions: KeyboardActions) {
+  return (event: KeyboardEvent) => {
+    if (event.target instanceof HTMLInputElement) return;
+
+    const key = event.key.toLowerCase();
+    const isLargeAdjustment = event.shiftKey;
+
+    switch (key) {
+      case 'm':
+        actions.onMutate?.();
+        break;
+      case 'r':
+        actions.onRandom?.();
+        break;
+      case 'p':
+        actions.onProcess?.();
+        break;
+      case 's':
+        actions.onDownload?.();
+        break;
+      case 'arrowleft':
+        event.preventDefault();
+        actions.onDurationDecrease?.(isLargeAdjustment);
+        break;
+      case 'arrowright':
+        event.preventDefault();
+        actions.onDurationIncrease?.(isLargeAdjustment);
+        break;
+      case 'arrowdown':
+        event.preventDefault();
+        actions.onVolumeDecrease?.(isLargeAdjustment);
+        break;
+      case 'arrowup':
+        event.preventDefault();
+        actions.onVolumeIncrease?.(isLargeAdjustment);
+        break;
+      case 'escape':
+        actions.onEscape?.();
+        break;
+    }
+  };
+}