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/**
* Server configuration manager, handling loading, creation, parsing and saving
* of the main config.json file
*
* Version: v2.0.0
* Developer: Marzavec ( https://github.com/marzavec )
* License: WTFPL ( http://www.wtfpl.net/txt/copying/ )
*
*/
const dateFormat = require('dateformat');
const fse = require('fs-extra');
const path = require('path');
class ConfigManager {
/**
* Create a `ConfigManager` instance for managing application settings
*
* @param {String} base executing directory name; __dirname
*/
constructor (base = __dirname) {
this.configPath = path.resolve(base, 'config/config.json');
if (!fse.existsSync(this.configPath)){
fse.ensureFileSync(this.configPath);
}
}
/**
* (Re)builds the config.json (main server config), or loads the config into mem
* if rebuilding, process will exit- this is to allow a process manager to take over
*
* @param {Boolean} reconfiguring set to true by `scripts/configure.js`, will exit if true
*/
async load () {
try {
this.config = fse.readJsonSync(this.configPath);
} catch (e) {
return false;
}
return this.config;
}
/**
* Creates backup of current config into configPath
*
*/
async backup () {
const backupPath = `${this.configPath}.${dateFormat('dd-mm-yy-HH-MM-ss')}.bak`;
fse.copySync(this.configPath, backupPath);
return backupPath;
}
/**
* First makes a backup of the current `config.json`, then writes current config
* to disk
*
*/
async save () {
const backupPath = await this.backup();
try {
fse.writeJSONSync(this.configPath, this.config);
fse.removeSync(backupPath);
return true;
} catch (err) {
console.log(`Failed to save config file: ${err}`);
return false;
}
}
/**
* Updates current config[`key`] with `value` then writes changes to disk
*
* @param {*} key arbitrary configuration key
* @param {*} value new value to change `key` to
*/
async set (key, value) {
const realKey = `${key}`;
this.config[realKey] = value;
return await this.save();
}
}
module.exports = ConfigManager;
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