first commit

api/app/controllers/jobs_controller.ts

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+import type { HttpContext } from '@adonisjs/core/http'
+import AuditLog from '#models/audit_log'
+import UserError from '#exceptions/user_error'
+import jobRunner, { type JobLine } from '#services/job_runner'
+import { openSse } from '#services/sse'
+
+export default class JobsController {
+  /**
+   * Replays the output of a job, then follows it until the end. Jobs
+   * finished a while ago are read from the action log.
+   */
+  async stream(ctx: HttpContext) {
+    const id = Number(ctx.params.id)
+    const job = jobRunner.get(id)
+    const entry = job ? null : await AuditLog.find(id)
+    if (!job && !entry) throw new UserError('Action introuvable.', 404)
+
+    const channel = openSse(ctx)
+
+    if (!job) {
+      const lines = (entry!.output ?? '')
+        .split('\n')
+        .map((text) => ({ ts: 0, stream: 'out', text }))
+      channel.send('meta', { id, action: entry!.action, target: entry!.target })
+      channel.send('lines', lines)
+      channel.send('end', { status: entry!.status })
+      channel.close()
+      return
+    }
+
+    channel.send('meta', { id, action: job.meta.action, target: job.meta.target })
+    channel.send('lines', job.lines)
+    if (job.status !== 'running') {
+      channel.send('end', { status: job.status })
+      channel.close()
+      return
+    }
+
+    const onLine = (line: JobLine) => channel.send('lines', [line])
+    const onEnd = (status: string) => {
+      channel.send('end', { status })
+      channel.close()
+    }
+    job.on('line', onLine)
+    job.once('end', onEnd)
+    channel.onClose(() => {
+      job.off('line', onLine)
+      job.off('end', onEnd)
+    })
+  }
+}