Torben Sorensen
6ab473f5f0
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58 lines
2.3 KiB
TypeScript
58 lines
2.3 KiB
TypeScript
// src/services/systemService.ts
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import { exec as nodeExec } from 'child_process';
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import { promisify } from 'util';
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import { logger } from './logger.server';
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// Define a type for the exec function for better type safety and testability.
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// It matches the signature of a promisified child_process.exec.
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export type ExecAsync = (command: string) => Promise<{ stdout: string; stderr: string }>;
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export class SystemService {
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private execAsync: ExecAsync;
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constructor(execAsync: ExecAsync) {
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this.execAsync = execAsync;
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}
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async getPm2Status(): Promise<{ success: boolean; message: string }> {
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try {
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const { stdout, stderr } = await this.execAsync('pm2 describe flyer-crawler-api');
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// If the command runs but produces output on stderr, treat it as an error.
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// This handles cases where pm2 might issue warnings but still exit 0.
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if (stderr) {
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throw new Error(`PM2 command produced an error: ${stderr}`);
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}
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const isOnline = /│\s*status\s*│\s*online\s*│/m.test(stdout);
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const message = isOnline
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? 'Application is online and running under PM2.'
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: 'Application process exists but is not online.';
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return { success: isOnline, message };
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} catch (error: unknown) {
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// If the command fails (non-zero exit code), check if it's because the process doesn't exist.
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// This is a normal "not found" case, not a system error.
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// The error message can be in stdout or stderr depending on the pm2 version.
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const execError = error as { stdout?: string; stderr?: string; message?: string };
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const output = execError.stdout || execError.stderr || '';
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if (output.includes("doesn't exist")) {
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logger.warn('[SystemService] PM2 process "flyer-crawler-api" not found.');
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return {
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success: false,
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message: 'Application process is not running under PM2.',
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};
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}
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// For any other error, log it and re-throw to be handled as a 500.
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logger.error(
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{ error: execError.stderr || execError.message },
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'[SystemService] Error executing pm2 describe:',
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);
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throw error;
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}
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}
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}
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// Instantiate the service with the real dependency for the application
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const realExecAsync = promisify(nodeExec);
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export const systemService = new SystemService(realExecAsync);
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