modmail/structure/Cache.js
2021-06-20 14:11:21 +03:00

100 lines
2.7 KiB
JavaScript

const fs = require('fs');
class Cache {
constructor(client) {
const opts = client._options;
this.client = client;
this.logger = client.logger;
this.saveInterval = opts.saveInterval;
this._ready = false;
this.queue = [];
this.channels = {};
this.lastActivity = {};
this.modmail = {};
this.updatedThreads = [];
}
load() {
if (this._ready) return;
if (fs.existsSync('./persistent_cache.json')) {
this.logger.info('Loading cache');
const raw = JSON.parse(fs.readFileSync('./persistent_cache.json', { encoding: 'utf-8' }));
const entries = Object.entries(raw);
for (const [key, val] of entries) this[key] = val;
} else {
this.logger.info('Cache file missing, creating...');
this.save();
}
this.cacheSaveInterval = setInterval(this.save.bind(this), 10 * 60 * 1000);
this.modmailSaveInterval = setInterval(this.save.bind(this), this.saveInterval * 60 * 1000, this.client.modmail);
this._ready = true;
}
save() {
this.logger.debug('Saving cache');
fs.writeFileSync('./persistent_cache.json', JSON.stringify(this.json));
}
saveModmailHistory() {
if (!this.updatedThreads.length) return;
const toSave = [...this.updatedThreads];
this.updatedThreads = [];
this.client.logger.debug(`Saving modmail data`);
if (!fs.existsSync('./modmail_cache')) fs.mkdirSync('./modmail_cache');
for (const id of toSave) {
const path = `./modmail_cache/${id}.json`;
try {
fs.writeFileSync(path, JSON.stringify(this.modmail[id]));
} catch (err) {
this.client.logger.error(`Error during saving of history\n${id}\n${JSON.stringify(this.modmail)}\n${err.stack}`);
}
}
}
loadModmailHistory(userId) {
return new Promise((resolve, reject) => {
if (this.modmail[userId]) return resolve(this.modmail[userId]);
const path = `./modmail_cache/${userId}.json`;
if (!fs.existsSync(path)) {
this.modmail[userId] = [];
return resolve(this.modmail[userId]);
}
fs.readFile(path, { encoding: 'utf-8' }, (err, data) => {
if (err) reject(err);
const parsed = JSON.parse(data);
this.modmail[userId] = parsed;
resolve(parsed);
});
});
}
get json() {
return {
queue: this.queue,
channels: this.channels,
lastActivity: this.lastActivity
};
}
}
module.exports = Cache;