release: prepare Desktop 0.13.10

src/main/assistant/execution-stats-reader.ts

@@ -0,0 +1,52 @@
+import { Worker } from 'node:worker_threads'
+import type { ExecutionStats, ExecutionStatsInput } from '../../shared/assistant-contracts'
+
+export class ExecutionStatsReader {
+  private worker?: Worker
+  private nextId = 0
+  private readonly pending = new Map<number, {
+    resolve: (value: ExecutionStats) => void
+    reject: (error: Error) => void
+  }>()
+
+  constructor(private readonly databasePath: string, private readonly workerPath: string) {}
+
+  read(scope: ExecutionStatsInput, activeRequestIds: ReadonlySet<string>): Promise<ExecutionStats> {
+    if (!this.worker) {
+      const worker = new Worker(this.workerPath, { workerData: { databasePath: this.databasePath } })
+      this.worker = worker
+      worker.on('message', (message: { id: number; result?: ExecutionStats; error?: string }) => {
+        const request = this.pending.get(message.id)
+        if (!request) return
+        this.pending.delete(message.id)
+        if (message.result) request.resolve(message.result)
+        else request.reject(new Error(message.error ?? 'Statistics query failed'))
+      })
+      const failed = (error: Error): void => {
+        if (this.worker !== worker) return
+        this.worker = undefined
+        for (const request of this.pending.values()) request.reject(error)
+        this.pending.clear()
+        void worker.terminate()
+      }
+      worker.once('error', failed)
+      worker.once('exit', (code) => failed(new Error(`Statistics worker exited (${code})`)))
+      worker.unref()
+    }
+    // Bound outstanding work when a window repeatedly changes scope during a slow read.
+    if (this.pending.size >= 16) return Promise.reject(new Error('Statistics reader is busy'))
+    const id = ++this.nextId
+    return new Promise((resolve, reject) => {
+      this.pending.set(id, { resolve, reject })
+      this.worker!.postMessage({ id, scope, activeRequestIds: [...activeRequestIds] })
+    })
+  }
+
+  close(): void {
+    const worker = this.worker
+    this.worker = undefined
+    for (const request of this.pending.values()) request.reject(new Error('Statistics reader closed'))
+    this.pending.clear()
+    if (worker) void worker.terminate()
+  }
+}