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/**
* This file is part of Haketilo.
*
* Function: Storage through messages (server side).
*
* Copyright (C) 2021 Wojtek Kosior
* Redistribution terms are gathered in the `copyright' file.
*/
/*
* IMPORTS_START
* IMPORT listen_for_connection
* IMPORT get_storage
* IMPORT list_prefixes
* IMPORT CONNECTION_TYPE
* IMPORTS_END
*/
var storage;
async function handle_remote_call(port, message)
{
let [call_id, func, args] = message;
try {
let result = await Promise.resolve(storage[func](...args));
port.postMessage({call_id, result});
} catch (error) {
error = error + '';
port.postMessage({call_id, error});
}
}
function remove_storage_listener(cb)
{
storage.remove_change_listener(cb);
}
function new_connection(port)
{
console.log("new remote storage connection!");
const message = {};
for (const prefix of list_prefixes)
message[prefix] = storage.get_all(prefix);
port.postMessage(message);
let handle_change = change => port.postMessage(change);
storage.add_change_listener(handle_change);
port.onMessage.addListener(m => handle_remote_call(port, m));
port.onDisconnect.addListener(() =>
remove_storage_listener(handle_change));
}
async function start_storage_server()
{
storage = await get_storage();
listen_for_connection(CONNECTION_TYPE.REMOTE_STORAGE, new_connection);
}
/*
* EXPORTS_START
* EXPORT start_storage_server
* EXPORTS_END
*/
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