joplin/ReactNativeClient/src/models/setting.js

import { BaseModel } from 'src/base-model.js';
import { Log } from 'src/log.js';
import { Database } from 'src/database.js';

class Setting extends BaseModel {

	static tableName() {
		return 'settings';
	}

	static defaultSetting(key) {
		if (!this.defaults_) {
			this.defaults_ = {
				'clientId': { value: '', type: 'string' },
				'sessionId': { value: '', type: 'string' },
				'lastUpdateTime': { value: '', type: 'int' },
			}
		}		
		if (!(key in this.defaults_)) throw new Error('Unknown key: ' + key);

		let output = Object.assign({}, this.defaults_[key]);
		output.key = key;
		return output;
	}

	static load() {
		this.cache_ = [];
		return this.db().selectAll('SELECT * FROM settings').then((r) => {
			for (let i = 0; i < r.rows.length; i++) {
				this.cache_.push(r.rows.item(i));
			}
		});
	}

	static setValue(key, value) {
		this.scheduleUpdate();
		for (let i = 0; i < this.cache_.length; i++) {
			if (this.cache_[i].key == key) {
				this.cache_[i].value = value;
				return;
			}
		}

		let s = this.defaultSetting(key);
		s.value = value;
		this.cache_.push(s);
	}

	static value(key) {
		for (let i = 0; i < this.cache_.length; i++) {
			if (this.cache_[i].key == key) {
				return this.cache_[i].value;
			}
		}

		let s = this.defaultSetting(key);
		return s.value;
	}

	static scheduleUpdate() {
		if (this.updateTimeoutId) clearTimeout(this.updateTimeoutId);

		this.updateTimeoutId = setTimeout(() => {
			Log.info('Saving settings...');
			this.updateTimeoutId = null;
			BaseModel.db().transaction((tx) => {
				tx.executeSql('DELETE FROM settings');
				for (let i = 0; i < this.cache_.length; i++) {
					let q = Database.insertQuery(this.tableName(), this.cache_[i]);
					tx.executeSql(q.sql, q.params);
				}
			}).then(() => {
				Log.info('Settings have been saved.');
			}).catch((error) => {
				Log.warn('Could not update settings:', error);
			});
		}, 500);
	}

}

export { Setting };