Allow selecting and deleting guest backup archives in Monitor

AppImage/lib/guest-backup-archives.ts

@@ -0,0 +1,54 @@
+import { fetchApi } from './api-config'
+
+export interface GuestBackup {
+  volid: string
+  storage: string
+  type: string
+  size: number
+  size_human: string
+  timestamp: number
+  date: string
+  notes?: string
+  protected?: boolean
+}
+
+export interface BackupDeletionResult {
+  volid: string
+  status: 'deleted' | 'pending' | 'unconfirmed'
+  task?: string
+  error?: string
+}
+
+// Exposed separately so callers can invalidate their inventory even after a
+// lost POST response. Never retry the destructive request automatically.
+export async function deleteGuestBackups(vmid: number, backups: GuestBackup[]): Promise<BackupDeletionResult[]> {
+  const response = await fetchApi<{ results: BackupDeletionResult[] }>(`/api/vms/${vmid}/backups/delete`, {
+    method: 'POST',
+    body: JSON.stringify({ confirm: true, backups: backups.map(({ volid, storage }) => ({ volid, storage })) }),
+    signal: AbortSignal.timeout(120_000),
+  })
+  if (!Array.isArray(response.results) || response.results.length !== backups.length ||
+      response.results.some((result, index) => result.volid !== backups[index].volid ||
+        !['deleted', 'pending', 'unconfirmed'].includes(result.status))) throw new Error('deletionUnconfirmed')
+
+  return Promise.all(response.results.map(async result => {
+    if (result.status !== 'pending' || !result.task) return result
+    const deadline = Date.now() + 120_000
+    let failures = 0
+    while (Date.now() < deadline) {
+      await new Promise(resolve => setTimeout(resolve, 1500))
+      try {
+        const status = await fetchApi<BackupDeletionResult>(
+          `/api/vms/${vmid}/backups/delete-status?task=${encodeURIComponent(result.task!)}`,
+          { signal: AbortSignal.timeout(10_000) },
+        )
+        if (status.volid !== result.volid || !['deleted', 'pending', 'unconfirmed'].includes(status.status)) break
+        if (status.status !== 'pending') return status
+        failures = 0
+      } catch {
+        if (++failures >= 3) break
+      }
+    }
+    return { ...result, status: 'unconfirmed', error: 'deletionUnconfirmed' }
+  }))
+}