forked from Galactic/modmail
106 lines
3.1 KiB
JavaScript
106 lines
3.1 KiB
JavaScript
const fs = require('fs');
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const CacheHandler = require('./abstractions/CacheHandler');
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class JsonCache extends CacheHandler {
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constructor (client) {
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super(client);
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const opts = client._options;
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this.logger = client.logger;
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this.saveInterval = opts.saveInterval;
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this._ready = false;
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// Data that gets stored to persistent cache
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this.queue = [];
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this.channels = {};
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this.lastActivity = {};
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this.misc = {}; // Random misc data, should not be non-primitive data types
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// Stored separately if at all
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this.modmail = {};
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this.updatedThreads = [];
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}
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load () {
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if (this._ready) return;
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if (fs.existsSync('./persistent_cache.json')) {
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this.logger.info('Loading cache');
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const raw = JSON.parse(fs.readFileSync('./persistent_cache.json', { encoding: 'utf-8' }));
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const entries = Object.entries(raw);
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for (const [ key, val ] of entries) this[key] = val;
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} else {
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this.logger.info('Cache file missing, creating...');
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this.savePersistentCache();
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}
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this.cacheSaveInterval = setInterval(this.savePersistentCache.bind(this), 10 * 60 * 1000);
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this.modmailSaveInterval = setInterval(this.saveModmailHistory.bind(this), this.saveInterval * 60 * 1000, this.client.modmail);
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this._ready = true;
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}
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savePersistentCache () {
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this.logger.debug('Saving cache');
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fs.writeFileSync('./persistent_cache.json', JSON.stringify(this.json));
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}
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saveModmailHistory () {
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if (!this.updatedThreads.length) return;
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const toSave = [ ...this.updatedThreads ];
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this.updatedThreads = [];
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this.client.logger.debug(`Saving modmail data`);
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if (!fs.existsSync('./modmail_cache')) fs.mkdirSync('./modmail_cache');
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for (const id of toSave) {
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const path = `./modmail_cache/${id}.json`;
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try {
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fs.writeFileSync(path, JSON.stringify(this.modmail[id]));
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} catch (err) {
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this.client.logger.error(`Error during saving of history\n${id}\n${JSON.stringify(this.modmail)}\n${err.stack}`);
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}
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}
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}
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loadModmailHistory (userId) {
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return new Promise((resolve, reject) => {
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if (this.modmail[userId]) return resolve(this.modmail[userId]);
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const path = `./modmail_cache/${userId}.json`;
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if (!fs.existsSync(path)) {
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this.modmail[userId] = [];
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return resolve(this.modmail[userId]);
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}
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fs.readFile(path, { encoding: 'utf-8' }, (err, data) => {
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if (err) reject(err);
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const parsed = JSON.parse(data);
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this.modmail[userId] = parsed;
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resolve(parsed);
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});
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});
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}
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get json () {
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return {
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queue: this.queue,
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channels: this.channels,
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lastActivity: this.lastActivity,
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misc: this.misc
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};
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}
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}
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module.exports = JsonCache; |