重构同步服务端功能部分代码，使其更易扩展新功能

src/main/modules/sync/migrate.ts

@@ -0,0 +1,77 @@
+import { File } from './constants'
+import fs from 'node:fs'
+import path from 'node:path'
+
+interface ServerKeyInfo {
+  clientId: string
+  key: string
+  deviceName: string
+  lastSyncDate?: number
+  snapshotKey?: string
+  lastConnectDate?: number
+  isMobile: boolean
+}
+
+
+const exists = async(path: string) => fs.promises.stat(path).then(() => true).catch(() => false)
+
+// 迁移 v2 sync 数据
+export default async(dataPath: string) => {
+  const syncDataPath = path.join(dataPath, 'sync')
+  // console.log(syncDataPath)
+  if (await exists(syncDataPath)) return
+  const oldInfoPath = path.join(dataPath, 'sync.json')
+  // console.log(oldInfoPath)
+  if (!await exists(oldInfoPath)) return
+  const serverSyncDataPath = path.join(dataPath, File.serverDataPath)
+  const clientSyncDataPath = path.join(dataPath, File.clientDataPath)
+
+  await fs.promises.mkdir(serverSyncDataPath, { recursive: true })
+  await fs.promises.mkdir(clientSyncDataPath, { recursive: true })
+  const info = JSON.parse((await fs.promises.readFile(oldInfoPath)).toString())
+
+
+  const serverInfoPath = path.join(serverSyncDataPath, File.serverInfoJSON)
+  const devicesInfoPath = path.join(serverSyncDataPath, File.userDevicesJSON)
+  const listDir = path.join(serverSyncDataPath, File.listDir)
+  await fs.promises.mkdir(listDir)
+
+
+  const snapshotInfo = info.snapshotInfo
+  delete info.snapshotInfo
+  snapshotInfo.clients = {}
+  for (const device of Object.values<ServerKeyInfo>(info.clients)) {
+    snapshotInfo.clients[device.clientId] = {
+      snapshotKey: device.snapshotKey,
+      lastSyncDate: device.lastSyncDate,
+    }
+    device.lastConnectDate = device.lastSyncDate
+    delete device.lastSyncDate
+    delete device.snapshotKey
+  }
+  const devicesInfo = {
+    userName: 'default',
+    clients: info.clients,
+  }
+  await fs.promises.writeFile(serverInfoPath, JSON.stringify({ serverId: info.serverId, version: 2 }))
+  await fs.promises.writeFile(devicesInfoPath, JSON.stringify(devicesInfo))
+  await fs.promises.writeFile(path.join(listDir, File.listSnapshotInfoJSON), JSON.stringify(snapshotInfo))
+
+  const snapshotPath = path.join(listDir, File.listSnapshotDir)
+  await fs.promises.mkdir(snapshotPath)
+  const snapshots = (await fs.promises.readdir(dataPath)).filter(name => name.startsWith('snapshot_'))
+  if (snapshots.length) {
+    for (const file of snapshots) {
+      await fs.promises.copyFile(path.join(dataPath, file), path.join(snapshotPath, file))
+    }
+  }
+
+
+  await fs.promises.writeFile(path.join(clientSyncDataPath, File.syncAuthKeysJSON), JSON.stringify(info.syncAuthKey))
+
+  for (const file of snapshots) {
+    await fs.promises.unlink(path.join(dataPath, file))
+  }
+  await fs.promises.unlink(oldInfoPath)
+}
+