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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 deepEqual from 'deep-equal';
import { debounce } from 'lodash-es';
import { reaction } from 'mobx';
import ms from 'ms';
import type ConfigPersistence from '../infrastructure/ConfigPersistence';
import { Config, SharedStore } from '../stores/SharedStore';
import type Disposer from '../utils/Disposer';
import { getLogger } from '../utils/log';
const DEFAULT_CONFIG_DEBOUNCE_TIME = ms('1s');
const log = getLogger('config');
export default async function initConfig(
sharedStore: SharedStore,
persistenceService: ConfigPersistence,
debounceTime: number = DEFAULT_CONFIG_DEBOUNCE_TIME,
): Promise<Disposer> {
log.trace('Initializing config controller');
let lastConfigOnDisk: Config | undefined;
async function writeConfig(): Promise<void> {
const { config } = sharedStore;
await persistenceService.writeConfig(config);
lastConfigOnDisk = config;
}
async function readConfig(): Promise<boolean> {
const result = await persistenceService.readConfig();
if (result.found) {
try {
// This cast is unsound if the config file is invalid,
// but we'll throw an error in the end anyways.
sharedStore.loadConfig(result.data as Config);
} catch (error) {
log.error('Failed to apply config snapshot', result.data, error);
return true;
}
lastConfigOnDisk = sharedStore.config;
if (!deepEqual(result.data, lastConfigOnDisk, { strict: true })) {
await writeConfig();
}
}
return result.found;
}
if (!(await readConfig())) {
log.info('Config file was not found');
await writeConfig();
log.info('Created config file');
}
const disposeReaction = reaction(
() => sharedStore.config,
debounce((config) => {
// We can compare snapshots by reference, since it is only recreated on store changes.
if (lastConfigOnDisk !== config) {
writeConfig().catch((error) => {
log.error('Failed to write config on config change', error);
});
}
}, debounceTime),
);
const disposeWatcher = persistenceService.watchConfig(async () => {
try {
await readConfig();
} catch (error) {
log.error('Failed to read config', error);
}
}, debounceTime);
return () => {
log.trace('Disposing config controller');
disposeWatcher();
disposeReaction();
};
}
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