pm2-slack-monitor/src/config.js

A CLI tool to monitor PM2 processes and send error logs to individual Slack channels via webhook.

const fs = require('fs');
const path = require('path');
const os = require('os');

const CONFIG_DIR = path.join(os.homedir(), '.my-monitor');
const CONFIG_FILE = path.join(CONFIG_DIR, 'config.json');

function ensureConfigFile() {
    if (!fs.existsSync(CONFIG_DIR)) {
        fs.mkdirSync(CONFIG_DIR, { recursive: true });
    }
    if (!fs.existsSync(CONFIG_FILE)) {
        fs.writeFileSync(CONFIG_FILE, JSON.stringify({ processes: {} }, null, 2));
    }
}

function readConfig() {
    ensureConfigFile();
    return JSON.parse(fs.readFileSync(CONFIG_FILE));
}

function writeConfig(config) {
    ensureConfigFile();
    fs.writeFileSync(CONFIG_FILE, JSON.stringify(config, null, 2));
}

function addProcess(name, webhook) {
    const config = readConfig();
    if (config.processes[name]) {
        console.error(`❌ Process "${name}" already exists. Use 'update' command to modify webhook.`);
        process.exit(1);
    }
    config.processes[name] = webhook;
    writeConfig(config);
    console.log(`✅ Process "${name}" added with Slack webhook.`);
}

function updateProcess(name, webhook) {
    const config = readConfig();
    if (!config.processes[name]) {
        console.error(`❌ Process "${name}" does not exist. Use 'add' to register it first.`);
        process.exit(1);
    }
    config.processes[name] = webhook;
    writeConfig(config);
    console.log(`🔄 Webhook for process "${name}" has been updated.`);
}

function removeProcess(name) {
    const config = readConfig();
    if (config.processes[name]) {
        delete config.processes[name];
        writeConfig(config);
        console.log(`❌ Process "${name}" removed from monitoring.`);
    } else {
        console.log(`⚠️ Process "${name}" not found.`);
    }
}

function getProcessesWithWebhooks() {
    return readConfig().processes;
}

function getProcesses() {
    return Object.keys(readConfig().processes);
}

function getWebhookForProcess(name) {
    return readConfig().processes[name];
}

module.exports = {
    addProcess,
    updateProcess,
    removeProcess,
    getProcesses,
    getProcessesWithWebhooks,
    getWebhookForProcess
};