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/*
* Copyright (C) 2021-2022 Kristóf Marussy <kristof@marussy.com>
*
* This file is part of Sophie.
*
* Sophie is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, version 3.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: AGPL-3.0-only
*/
import { debounce } from 'lodash-es';
import ms from 'ms';
import { applySnapshot, getSnapshot, onSnapshot } from 'mobx-state-tree';
import type { ConfigPersistenceService } from '../services/ConfigPersistenceService.js';
import type { Config, ConfigSnapshotOut } from '../stores/Config.js';
import { Disposer } from '../utils/disposer';
import { getLogger } from '../utils/logging';
const DEFAULT_CONFIG_DEBOUNCE_TIME = ms('1s');
const log = getLogger('config');
export async function initConfig(
config: Config,
persistenceService: ConfigPersistenceService,
debounceTime: number = DEFAULT_CONFIG_DEBOUNCE_TIME,
): Promise<Disposer> {
log.trace('Initializing config controller');
let lastSnapshotOnDisk: ConfigSnapshotOut | null = null;
async function readConfig(): Promise<boolean> {
const result = await persistenceService.readConfig();
if (result.found) {
try {
applySnapshot(config, result.data);
lastSnapshotOnDisk = getSnapshot(config);
} catch (err) {
log.error('Failed to apply config snapshot', result.data, err);
}
}
return result.found;
}
async function writeConfig(): Promise<void> {
const snapshot = getSnapshot(config);
await persistenceService.writeConfig(snapshot);
lastSnapshotOnDisk = snapshot;
}
if (!await readConfig()) {
log.info('Config file was not found');
await writeConfig();
log.info('Created config file');
}
const disposeOnSnapshot = onSnapshot(config, debounce((snapshot) => {
// We can compare snapshots by reference, since it is only recreated on store changes.
if (lastSnapshotOnDisk !== snapshot) {
writeConfig().catch((err) => {
log.error('Failed to write config on config change', err);
});
}
}, debounceTime));
const disposeWatcher = persistenceService.watchConfig(async () => {
try {
await readConfig();
} catch (err) {
log.error('Failed to read config', err);
}
}, debounceTime);
return () => {
log.trace('Disposing config controller');
disposeWatcher();
disposeOnSnapshot();
};
}
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