FEATURE: single source of truth for default values added

scripts/generate_ts_defaults.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+"""
+Generate TypeScript constants from audio_splitter/defaults.py.
+"""
+
+import importlib.util
+import json
+import sys
+from pathlib import Path
+
+# Get the directory where this script is located
+SCRIPT_DIR = Path(__file__).parent.absolute()
+
+# The defaults.py is in the same directory as the script
+DEFAULTS_PATH = SCRIPT_DIR / "defaults.py"
+
+# The frontend source is at SCRIPT_DIR.parent (i.e., /app)
+# The generated file should be at /app/src/constants/generated.ts
+FRONTEND_ROOT = SCRIPT_DIR.parent
+OUTPUT_PATH = FRONTEND_ROOT / "src" / "constants" / "generated.ts"
+
+
+def load_defaults_module():
+    spec = importlib.util.spec_from_file_location("defaults", DEFAULTS_PATH)
+    if spec is None:
+        raise RuntimeError(f"Could not load spec for {DEFAULTS_PATH}")
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+def format_value(value):
+    """Convert Python value to TypeScript literal."""
+    if value is None:
+        return "null"
+    if isinstance(value, bool):
+        return str(value).lower()
+    if isinstance(value, str):
+        # Use json.dumps to produce a properly escaped string literal
+        return json.dumps(value)
+    if isinstance(value, (int, float)):
+        return str(value)
+    if isinstance(value, list):
+        return f"[{', '.join(format_value(v) for v in value)}]"
+    return repr(value)
+
+
+def main():
+    print(f"Generating TypeScript defaults from {DEFAULTS_PATH}")
+    defaults = load_defaults_module()
+
+    constants = {name: value for name, value in vars(defaults).items() if name.startswith("DEFAULT_")}
+
+    if not constants:
+        print("No DEFAULT_* constants found.")
+        sys.exit(1)
+
+    lines = [
+        "// ============================================================================",
+        "// GENERATED FILE – DO NOT EDIT MANUALLY.",
+        "// This file is generated from audio_splitter/defaults.py.",
+        "// Run `npm run generate` or `python scripts/generate_ts_defaults.py` to update.",
+        "// ============================================================================",
+        "",
+    ]
+
+    for name, value in sorted(constants.items()):
+        ts_value = format_value(value)
+        lines.append(f"export const {name} = {ts_value};")
+
+    OUTPUT_PATH.parent.mkdir(parents=True, exist_ok=True)
+    OUTPUT_PATH.write_text("\n".join(lines) + "\n")
+
+    print(f"✅ Generated {OUTPUT_PATH}")
+    print(f"   {len(constants)} constants exported.")
+
+
+if __name__ == "__main__":
+    main()