@whiskeysockets/baileys
Version:
A WebSockets library for interacting with WhatsApp Web
64 lines (63 loc) • 2.49 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.readAndEmitEventStream = exports.captureEventStream = void 0;
const events_1 = __importDefault(require("events"));
const fs_1 = require("fs");
const promises_1 = require("fs/promises");
const readline_1 = require("readline");
const generics_1 = require("./generics");
const make_mutex_1 = require("./make-mutex");
/**
* Captures events from a baileys event emitter & stores them in a file
* @param ev The event emitter to read events from
* @param filename File to save to
*/
const captureEventStream = (ev, filename) => {
const oldEmit = ev.emit;
// write mutex so data is appended in order
const writeMutex = (0, make_mutex_1.makeMutex)();
// monkey patch eventemitter to capture all events
ev.emit = function (...args) {
const content = JSON.stringify({ timestamp: Date.now(), event: args[0], data: args[1] }) + '\n';
const result = oldEmit.apply(ev, args);
writeMutex.mutex(async () => {
await (0, promises_1.writeFile)(filename, content, { flag: 'a' });
});
return result;
};
};
exports.captureEventStream = captureEventStream;
/**
* Read event file and emit events from there
* @param filename filename containing event data
* @param delayIntervalMs delay between each event emit
*/
const readAndEmitEventStream = (filename, delayIntervalMs = 0) => {
const ev = new events_1.default();
const fireEvents = async () => {
// from: https://stackoverflow.com/questions/6156501/read-a-file-one-line-at-a-time-in-node-js
const fileStream = (0, fs_1.createReadStream)(filename);
const rl = (0, readline_1.createInterface)({
input: fileStream,
crlfDelay: Infinity
});
// Note: we use the crlfDelay option to recognize all instances of CR LF
// ('\r\n') in input.txt as a single line break.
for await (const line of rl) {
if (line) {
const { event, data } = JSON.parse(line);
ev.emit(event, data);
delayIntervalMs && await (0, generics_1.delay)(delayIntervalMs);
}
}
fileStream.close();
};
return {
ev,
task: fireEvents()
};
};
exports.readAndEmitEventStream = readAndEmitEventStream;