khodowany
91 lines
4.4 KiB
Python
91 lines
4.4 KiB
Python
from __future__ import annotations
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import argparse
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import json
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import pathlib
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import re
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import sqlite3
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import tempfile
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APPLICATION_ID = 0x56414D50
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SONG_COLUMNS = """
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id TEXT PRIMARY KEY NOT NULL CHECK(length(trim(id)) BETWEEN 1 AND 160),
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title TEXT NOT NULL CHECK(length(trim(title)) BETWEEN 1 AND 200),
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composer TEXT NOT NULL,
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key_signature TEXT NOT NULL,
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source_path TEXT NOT NULL UNIQUE CHECK(length(source_path) > 0),
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source_json TEXT NOT NULL CHECK(json_valid(source_json)),
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measure_count INTEGER NOT NULL CHECK(measure_count > 0),
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total_pages INTEGER NOT NULL CHECK(total_pages BETWEEN 1 AND 10000),
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title_image TEXT NOT NULL CHECK(length(title_image) = 64 AND title_image NOT GLOB '*[^0-9a-f]*')
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"""
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def metadata(path: pathlib.Path, root: pathlib.Path) -> dict:
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if path.is_symlink() or not path.resolve().is_relative_to(root.resolve()):
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raise ValueError('score escapes the asset root')
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text = path.read_text(encoding='utf-8')
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document = json.loads(text)
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if not isinstance(document, dict) or not isinstance(document.get('music'), dict) or not isinstance(document.get('presentation'), dict):
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raise ValueError('score bundle requires music and presentation objects')
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music, presentation = document['music'], document['presentation']
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if len(music['staves']) != 1 or (presentation['width'], presentation['height']) != (976, 484):
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raise ValueError('expected one staff and 976x484 pages')
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staff, meta = music['staves'][0], music['metadata']
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for name in ('title', 'composer', 'key_signature', 'time_signature'):
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if not isinstance(meta[name], str):
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raise ValueError(f'{name} must be a string')
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key = meta['key_signature']
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title_image = presentation.get('title_image')
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if not isinstance(title_image, str) or not re.fullmatch('[0-9a-f]{64}', title_image):
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raise ValueError('presentation requires a generated Pico title image; regenerate assets')
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if not isinstance(staff['name'], str):
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raise ValueError('staff name must be a string')
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relative = path.relative_to(root)
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return dict(id=path.stem, title=meta['title'], composer=meta['composer'], key_signature=key,
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source_path=relative.as_posix(), source_json=text,
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measure_count=len(staff['measures']), total_pages=len(presentation['pages']), title_image=title_image, part=staff['name'])
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def populate(connection: sqlite3.Connection, root: pathlib.Path) -> None:
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if not root.is_dir():
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raise ValueError(f'{root}: score asset directory not found')
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folder = root / 'songs'
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if (folder.exists() or folder.is_symlink()) and not folder.is_dir():
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raise ValueError(f'{folder}: score asset directory not found')
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with connection:
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connection.execute('BEGIN')
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connection.execute(f'PRAGMA application_id = {APPLICATION_ID}')
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connection.execute(f'CREATE TABLE songs ({SONG_COLUMNS}, part TEXT NOT NULL) STRICT')
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connection.execute('CREATE INDEX songs_menu ON songs(title, composer, part, id)')
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for path in sorted(folder.rglob('*.json')):
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try:
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if path.parent != folder:
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raise ValueError('unexpected songs score path')
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row = metadata(path, root)
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connection.execute(f'INSERT INTO songs ({", ".join(row)}) VALUES ({", ".join("?" for _ in row)})', tuple(row.values()))
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except (ValueError, KeyError, TypeError, sqlite3.Error) as error:
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raise ValueError(f'{path}: {error}') from error
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if connection.execute('PRAGMA integrity_check').fetchall() != [('ok',)]:
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raise ValueError('catalog integrity check failed')
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def build_catalog(root: pathlib.Path, destination: pathlib.Path | None = None) -> pathlib.Path:
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if not root.is_dir():
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raise ValueError(f'{root}: score asset directory not found')
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destination = destination or root / 'catalog.db'
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destination.parent.mkdir(parents=True, exist_ok=True)
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with tempfile.TemporaryDirectory(prefix='.vamp-catalog-', dir=destination.parent) as temporary:
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staged = pathlib.Path(temporary) / 'catalog.db'
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connection = sqlite3.connect(staged)
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try:
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populate(connection, root)
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finally:
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connection.close()
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staged.replace(destination)
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return destination
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if __name__ == '__main__':
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parser = argparse.ArgumentParser(description='Compile generated score bundles into a read-only runtime catalog.')
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parser.add_argument('assets', type=pathlib.Path)
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parser.add_argument('destination', type=pathlib.Path, nargs='?')
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arguments = parser.parse_args()
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build_catalog(arguments.assets, arguments.destination)
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