Feat: basic audio waveform added.

apps/web/src/components/editor/audio-waveform.tsx

@@ -0,0 +1,115 @@
+import React, { useEffect, useRef, useState } from 'react';
+import WaveSurfer from 'wavesurfer.js';
+
+interface AudioWaveformProps {
+  audioUrl: string;
+  height?: number;
+  className?: string;
+}
+
+const AudioWaveform: React.FC<AudioWaveformProps> = ({ 
+  audioUrl, 
+  height = 32, 
+  className = '' 
+}) => {
+  const waveformRef = useRef<HTMLDivElement>(null);
+  const wavesurfer = useRef<WaveSurfer | null>(null);
+  const [isLoading, setIsLoading] = useState(true);
+  const [error, setError] = useState(false);
+
+  useEffect(() => {
+    let mounted = true;
+
+    const initWaveSurfer = async () => {
+      if (!waveformRef.current || !audioUrl) return;
+
+      try {
+        // Clean up any existing instance
+        if (wavesurfer.current) {
+          try {
+            wavesurfer.current.destroy();
+          } catch (e) {
+            // Silently ignore destroy errors
+          }
+          wavesurfer.current = null;
+        }
+
+        wavesurfer.current = WaveSurfer.create({
+          container: waveformRef.current,
+          waveColor: 'rgba(255, 255, 255, 0.6)',
+          progressColor: 'rgba(255, 255, 255, 0.9)',
+          cursorColor: 'transparent',
+          barWidth: 2,
+          barGap: 1,
+          height: height,
+          normalize: true,
+          interact: false,
+        });
+
+        // Event listeners
+        wavesurfer.current.on('ready', () => {
+          if (mounted) {
+            setIsLoading(false);
+            setError(false);
+          }
+        });
+
+        wavesurfer.current.on('error', (err) => {
+          console.error('WaveSurfer error:', err);
+          if (mounted) {
+            setError(true);
+            setIsLoading(false);
+          }
+        });
+
+        await wavesurfer.current.load(audioUrl);
+
+      } catch (err) {
+        console.error('Failed to initialize WaveSurfer:', err);
+        if (mounted) {
+          setError(true);
+          setIsLoading(false);
+        }
+      }
+    };
+
+    initWaveSurfer();
+
+    return () => {
+      mounted = false;
+      if (wavesurfer.current) {
+        try {
+          wavesurfer.current.destroy();
+        } catch (e) {
+          // Silently ignore destroy errors
+        }
+        wavesurfer.current = null;
+      }
+    };
+  }, [audioUrl, height]);
+
+  if (error) {
+    return (
+      <div className={`flex items-center justify-center ${className}`} style={{ height }}>
+        <span className="text-xs text-foreground/60">Audio unavailable</span>
+      </div>
+    );
+  }
+
+  return (
+    <div className={`relative ${className}`}>
+      {isLoading && (
+        <div className="absolute inset-0 flex items-center justify-center">
+          <span className="text-xs text-foreground/60">Loading...</span>
+        </div>
+      )}
+      <div 
+        ref={waveformRef} 
+        className={`w-full transition-opacity duration-200 ${isLoading ? 'opacity-0' : 'opacity-100'}`}
+        style={{ height }}
+      />
+    </div>
+  );
+};
+
+export default AudioWaveform;