Update authentication system, database models, and UI components

concat_opus.py

@@ -0,0 +1,78 @@
+# concat_opus.py — Concatenate all opus files in a user directory in random order into a single stream.opus
+import os
+import random
+import subprocess
+from pathlib import Path
+
+def concat_opus_files(user_dir: Path, output_file: Path):
+    """
+    Concatenate all .opus files in user_dir (except stream.opus) in random order into output_file.
+    Overwrites output_file if exists. Creates it if missing.
+    """
+    # Clean up any existing filelist.txt to prevent issues
+    filelist_path = user_dir / 'filelist.txt'
+    if filelist_path.exists():
+        try:
+            filelist_path.unlink()
+        except Exception as e:
+            print(f"Warning: Could not clean up old filelist.txt: {e}")
+    
+    # Get all opus files except stream.opus and remove any duplicates
+    import hashlib
+    file_hashes = set()
+    files = []
+    
+    for f in user_dir.glob('*.opus'):
+        if f.name == 'stream.opus':
+            continue
+            
+        try:
+            # Calculate file hash for duplicate detection
+            hasher = hashlib.md5()
+            with open(f, 'rb') as file:
+                buf = file.read(65536)  # Read in 64kb chunks
+                while len(buf) > 0:
+                    hasher.update(buf)
+                    buf = file.read(65536)
+            file_hash = hasher.hexdigest()
+            
+            # Skip if we've seen this exact file before
+            if file_hash in file_hashes:
+                print(f"Removing duplicate file: {f.name}")
+                f.unlink()
+                continue
+                
+            file_hashes.add(file_hash)
+            files.append(f)
+            
+        except Exception as e:
+            print(f"Error processing {f}: {e}")
+    
+    if not files:
+        # If no files, create an empty stream.opus
+        output_file.write_bytes(b'')
+        return output_file
+        
+    random.shuffle(files)
+    
+    # Create a filelist for ffmpeg concat
+    filelist_path = user_dir / 'filelist.txt'
+    with open(filelist_path, 'w') as f:
+        for opusfile in files:
+            f.write(f"file '{opusfile.resolve()}'\n")
+    
+    # ffmpeg concat demuxer (no re-encoding)
+    cmd = [
+        'ffmpeg', '-y', '-f', 'concat', '-safe', '0', '-i', str(filelist_path),
+        '-c', 'copy', str(output_file)
+    ]
+    try:
+        subprocess.run(cmd, check=True, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+    except subprocess.CalledProcessError as e:
+        raise RuntimeError(f"FFmpeg concat failed: {e}")
+    finally:
+        if filelist_path.exists():
+            filelist_path.unlink()
+    if not output_file.exists():
+        raise RuntimeError("Concatenation did not produce output.")
+    return output_file