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const { R } = require("redbean-node");
const { log } = require("../src/util");
class Settings {
/**
* Example:
* {
* key1: {
* value: "value2",
* timestamp: 12345678
* },
* key2: {
* value: 2,
* timestamp: 12345678
* },
* }
* @type {{}}
*/
static cacheList = {
};
static cacheCleaner = null;
/**
* Retrieve value of setting based on key
* @param {string} key Key of setting to retrieve
* @returns {Promise<any>} Value
*/
static async get(key) {
// Start cache clear if not started yet
if (!Settings.cacheCleaner) {
Settings.cacheCleaner = setInterval(() => {
log.debug("settings", "Cache Cleaner is just started.");
for (key in Settings.cacheList) {
if (Date.now() - Settings.cacheList[key].timestamp > 60 * 1000) {
log.debug("settings", "Cache Cleaner deleted: " + key);
delete Settings.cacheList[key];
}
}
}, 60 * 1000);
}
// Query from cache
if (key in Settings.cacheList) {
const v = Settings.cacheList[key].value;
log.debug("settings", `Get Setting (cache): ${key}: ${v}`);
return v;
}
let value = await R.getCell("SELECT `value` FROM setting WHERE `key` = ? ", [
key,
]);
try {
const v = JSON.parse(value);
log.debug("settings", `Get Setting: ${key}: ${v}`);
Settings.cacheList[key] = {
value: v,
timestamp: Date.now()
};
return v;
} catch (e) {
return value;
}
}
/**
* Sets the specified setting to specified value
* @param {string} key Key of setting to set
* @param {any} value Value to set to
* @param {?string} type Type of setting
* @returns {Promise<void>}
*/
static async set(key, value, type = null) {
let bean = await R.findOne("setting", " `key` = ? ", [
key,
]);
if (!bean) {
bean = R.dispense("setting");
bean.key = key;
}
bean.type = type;
bean.value = JSON.stringify(value);
await R.store(bean);
Settings.deleteCache([ key ]);
}
/**
* Get settings based on type
* @param {string} type The type of setting
* @returns {Promise<Bean>} Settings
*/
static async getSettings(type) {
let list = await R.getAll("SELECT `key`, `value` FROM setting WHERE `type` = ? ", [
type,
]);
let result = {};
for (let row of list) {
try {
result[row.key] = JSON.parse(row.value);
} catch (e) {
result[row.key] = row.value;
}
}
return result;
}
/**
* Set settings based on type
* @param {string} type Type of settings to set
* @param {object} data Values of settings
* @returns {Promise<void>}
*/
static async setSettings(type, data) {
let keyList = Object.keys(data);
let promiseList = [];
for (let key of keyList) {
let bean = await R.findOne("setting", " `key` = ? ", [
key
]);
if (bean == null) {
bean = R.dispense("setting");
bean.type = type;
bean.key = key;
}
if (bean.type === type) {
bean.value = JSON.stringify(data[key]);
promiseList.push(R.store(bean));
}
}
await Promise.all(promiseList);
Settings.deleteCache(keyList);
}
/**
* Delete selected keys from settings cache
* @param {string[]} keyList Keys to remove
* @returns {void}
*/
static deleteCache(keyList) {
for (let key of keyList) {
delete Settings.cacheList[key];
}
}
/**
* Stop the cache cleaner if running
* @returns {void}
*/
static stopCacheCleaner() {
if (Settings.cacheCleaner) {
clearInterval(Settings.cacheCleaner);
Settings.cacheCleaner = null;
}
}
}
module.exports = {
Settings,
};
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