"""Export only LoRA labels/triggers; invoked by the host's catalog change watcher."""
import json
import os
import sys
from pathlib import Path

def export(source, destination):
    catalog = json.loads(Path(source).read_text())
    result = {key: {name: value for name, value in catalog.get(key, {}).items()
                    if isinstance(value, str)} for key in ('loraAliases', 'loraTriggers')}
    target = Path(destination)
    content = json.dumps(result, ensure_ascii=False)
    if target.exists() and target.read_text() == content:
        return
    target.parent.mkdir(parents=True, exist_ok=True)
    temporary = target.with_suffix('.tmp')
    temporary.write_text(content)
    os.chmod(temporary, 0o644)
    temporary.replace(target)

if __name__ == '__main__':
    export(*sys.argv[1:])