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| 1 | +import pidusage from 'pidusage'; |
| 2 | +import fs from 'fs'; |
| 3 | +import path from 'path'; |
| 4 | +import { exec } from 'node:child_process'; |
| 5 | +import { promisify } from 'util'; |
| 6 | +import { clearInterval } from 'node:timers'; |
| 7 | + |
| 8 | +const execAsync = promisify(exec); |
| 9 | + |
| 10 | +interface UsageData { |
| 11 | + timestamp: string; |
| 12 | + cpu: number; |
| 13 | + memory: number; |
| 14 | +} |
| 15 | + |
| 16 | +export class PidMonitor { |
| 17 | + get data(): UsageData[] { |
| 18 | + return this._data; |
| 19 | + } |
| 20 | + |
| 21 | + private pid: number | undefined; |
| 22 | + private intervalMs: number; |
| 23 | + private _data: UsageData[] = []; |
| 24 | + private timer: ReturnType<typeof setTimeout> | undefined = undefined; |
| 25 | + |
| 26 | + constructor(intervalMs = 1000) { |
| 27 | + this.intervalMs = intervalMs; |
| 28 | + } |
| 29 | + |
| 30 | + public async init(): Promise<boolean> { |
| 31 | + const processName = 'Google Chrome for Testing'; |
| 32 | + try { |
| 33 | + const { stdout } = await execAsync(`pgrep -x "${processName}"`); |
| 34 | + this.pid = Number(stdout.trim()); |
| 35 | + return true; |
| 36 | + } catch (error) { |
| 37 | + console.error('Error finding PID:', error); |
| 38 | + return false; |
| 39 | + } |
| 40 | + } |
| 41 | + |
| 42 | + public start(): void { |
| 43 | + if (!this.pid) { |
| 44 | + throw new Error('PID is not set. Did you call init()?'); |
| 45 | + } |
| 46 | + if (this.timer) return; |
| 47 | + |
| 48 | + this.timer = setInterval(async () => { |
| 49 | + try { |
| 50 | + const stats = await pidusage(this.pid!); |
| 51 | + this._data.push({ |
| 52 | + timestamp: new Date().toISOString(), |
| 53 | + cpu: stats.cpu, |
| 54 | + memory: stats.memory |
| 55 | + }); |
| 56 | + } catch { |
| 57 | + this.stop(); |
| 58 | + } |
| 59 | + }, this.intervalMs); |
| 60 | + } |
| 61 | + |
| 62 | + public stop(): void { |
| 63 | + if (this.timer) { |
| 64 | + clearInterval(this.timer); |
| 65 | + this.timer = undefined; |
| 66 | + } |
| 67 | + } |
| 68 | + |
| 69 | + public clear(): void { |
| 70 | + this._data = []; |
| 71 | + } |
| 72 | + |
| 73 | + public saveToFile(filePath: string): void { |
| 74 | + const dir = path.dirname(filePath); |
| 75 | + if (!fs.existsSync(dir)) { |
| 76 | + fs.mkdirSync(dir, { recursive: true }); |
| 77 | + } |
| 78 | + fs.writeFileSync(filePath, JSON.stringify(this._data, undefined, 2), 'utf-8'); |
| 79 | + } |
| 80 | +} |
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