Datasette plugin for updating db and metadata

plugin.py

from datasette import hookimpl
from datasette.database import Database

from starlette.responses import HTMLResponse
from starlette.routing import Router, Route
from starlette.endpoints import HTTPEndpoint


@hookimpl
def asgi_wrapper(datasette):
    def wrap_with_update_metadata(app):
        async def wrapped_app(scope, receive, send):
            path = scope["path"]
            if path.startswith("/-/update/"):
                await (update_metadata_db(datasette))(scope, receive, send)
            else:
                await app(scope, receive, send)

        return wrapped_app

    return wrap_with_update_metadata


def update_metadata_db(datasette):
    UpdateMetadata = get_update_metadata(datasette)
    UpdateDatabase = get_update_database(datasette)
    return Router(
            routes=[
                Route("/-/update/metadata", endpoint=UpdateMetadata, methods=["POST"]),
                Route("/-/update/db", endpoint=UpdateDatabase, methods=["POST"]),
                ]
    )


def get_update_metadata(datasette):
    class UpdateMetadata(HTTPEndpoint):
        async def post(self, request):
            metadata = await request.json()
            # datasette.update_with_inherited_metadata(metadata)
            datasette._metadata = metadata
            return HTMLResponse("Successfully updated metadata.", status_code=200)

    return UpdateMetadata

def get_update_database(datasette):
    class UpdateDatabase(HTTPEndpoint):
        async def post(self, request):
            body = await request.json()
            dbname = body['dbname']
            dbpath = body['path']
            datasette.add_database(
                dbname,
                Database(datasette, path=dbpath, is_mutable=True),
            )
            return HTMLResponse(f"Successfully added {dbname}", status_code=200)

    return UpdateDatabase