signal-desktop/app/base_config.js

60 lines
1.3 KiB
JavaScript
Raw Normal View History

const fs = require('fs');
const _ = require('lodash');
const ENCODING = 'utf8';
module.exports = {
start,
};
function start(name, targetPath, options = {}) {
const { allowMalformedOnStartup } = options;
let cachedValue = null;
try {
const text = fs.readFileSync(targetPath, ENCODING);
cachedValue = JSON.parse(text);
console.log(`config/get: Successfully read ${name} config file`);
if (!cachedValue) {
console.log(
`config/get: ${name} config value was falsy, cache is now empty object`
);
cachedValue = Object.create(null);
}
} catch (error) {
if (!allowMalformedOnStartup && error.code !== 'ENOENT') {
throw error;
}
console.log(
`config/get: Did not find ${name} config file, cache is now empty object`
);
cachedValue = Object.create(null);
}
function get(keyPath) {
return _.get(cachedValue, keyPath);
}
function set(keyPath, value) {
_.set(cachedValue, keyPath, value);
console.log(`config/set: Saving ${name} config to disk`);
const text = JSON.stringify(cachedValue, null, ' ');
fs.writeFileSync(targetPath, text, ENCODING);
}
function remove() {
console.log(`config/remove: Deleting ${name} config from disk`);
fs.unlinkSync(targetPath);
cachedValue = Object.create(null);
}
return {
set,
get,
remove,
};
}