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/**
* This file is part of Haketilo.
*
* Function: Storage through messages (server side).
*
* Copyright (C) 2021 Wojtek Kosior
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* As additional permission under GNU GPL version 3 section 7, you
* may distribute forms of that code without the copy of the GNU
* GPL normally required by section 4, provided you include this
* license notice and, in case of non-source distribution, a URL
* through which recipients can access the Corresponding Source.
* If you modify file(s) with this exception, you may extend this
* exception to your version of the file(s), but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* As a special exception to the GPL, any HTML file which merely
* makes function calls to this code, and for that purpose
* includes it by reference shall be deemed a separate work for
* copyright law purposes. If you modify this code, you may extend
* this exception to your version of the code, but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* I, Wojtek Kosior, thereby promise not to sue for violation of this file's
* license. Although I request that you do not make use this code in a
* proprietary program, I am not going to enforce this in court.
*/
/*
* 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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