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/**
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* This file is part of Haketilo.
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*
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* Function: Storage through messages (server side).
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*
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* Copyright (C) 2021 Wojtek Kosior
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* As additional permission under GNU GPL version 3 section 7, you
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* may distribute forms of that code without the copy of the GNU
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* GPL normally required by section 4, provided you include this
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* license notice and, in case of non-source distribution, a URL
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* through which recipients can access the Corresponding Source.
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* If you modify file(s) with this exception, you may extend this
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* exception to your version of the file(s), but you are not
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* obligated to do so. If you do not wish to do so, delete this
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* exception statement from your version.
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*
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* As a special exception to the GPL, any HTML file which merely
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* makes function calls to this code, and for that purpose
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* includes it by reference shall be deemed a separate work for
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* copyright law purposes. If you modify this code, you may extend
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* this exception to your version of the code, but you are not
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* obligated to do so. If you do not wish to do so, delete this
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* exception statement from your version.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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* I, Wojtek Kosior, thereby promise not to sue for violation of this file's
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* license. Although I request that you do not make use this code in a
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* proprietary program, I am not going to enforce this in court.
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*/
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/*
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* IMPORTS_START
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* IMPORT listen_for_connection
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* IMPORT get_storage
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* IMPORT list_prefixes
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* IMPORT CONNECTION_TYPE
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* IMPORTS_END
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*/
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var storage;
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async function handle_remote_call(port, message)
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{
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let [call_id, func, args] = message;
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try {
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let result = await Promise.resolve(storage[func](...args));
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port.postMessage({call_id, result});
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} catch (error) {
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error = error + '';
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port.postMessage({call_id, error});
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}
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}
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function remove_storage_listener(cb)
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{
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storage.remove_change_listener(cb);
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}
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function new_connection(port)
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{
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console.log("new remote storage connection!");
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const message = {};
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for (const prefix of list_prefixes)
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message[prefix] = storage.get_all(prefix);
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port.postMessage(message);
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let handle_change = change => port.postMessage(change);
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storage.add_change_listener(handle_change);
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port.onMessage.addListener(m => handle_remote_call(port, m));
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port.onDisconnect.addListener(() =>
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remove_storage_listener(handle_change));
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}
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async function start_storage_server()
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{
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storage = await get_storage();
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listen_for_connection(CONNECTION_TYPE.REMOTE_STORAGE, new_connection);
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}
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/*
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* EXPORTS_START
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* EXPORT start_storage_server
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* EXPORTS_END
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*/
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