implemented a lot of features

commands/DeferredExpandRanges.ts

@@ -0,0 +1,32 @@
+import { BaseCommand, flags } from '@adonisjs/core/ace'
+import { CommandOptions } from '@adonisjs/core/types/ace'
+import NntpService from '#services/NntpService'
+import QueueService from '#services/QueueService'
+import DeferredService from '#services/DeferredService'
+
+/**
+ * Sends recorded deferred ranges (fully obfuscated ngPost articles, CONCEPT.md
+ * D28) to the body queue, oldest first. Every article in them is downloaded:
+ * their headers can't be grouped into files.
+ */
+export default class DeferredExpandRanges extends BaseCommand {
+  public static commandName = 'deferred:expand-ranges'
+  public static description = 'Queues the bodies of deferred article ranges (costly: every article is downloaded).'
+
+  public static options: CommandOptions = {
+    startApp: true,
+  }
+
+  @flags.number({ description: 'Ranges to expand', default: 10 })
+  declare limit: number
+
+  public async run() {
+    try {
+      const { ranges, articles } = await DeferredService.expandRanges(this.limit)
+      this.logger.info(`Expanded ${ranges} ranges: ${articles} articles sent to the body queue.`)
+    } finally {
+      await NntpService.shutdown()
+      await QueueService.closeAll()
+    }
+  }
+}