feat: display file backup status in file context menu (#2044) (skip e2e)

* feat: show file backup status in context menu

* feat: show backup status in list cell

* feat: mapping cache

* feat: add to linking menu + date format

* fix: types

packages/services/src/Domain/Backups/BackupService.ts

@@ -2,7 +2,13 @@ import { ContentType, Uuid } from '@standardnotes/common'
 import { EncryptionProviderInterface } from '@standardnotes/encryption'
 import { PayloadEmitSource, FileItem, CreateEncryptedBackupFileContextPayload } from '@standardnotes/models'
 import { ClientDisplayableError } from '@standardnotes/responses'
-import { FilesApiInterface, FileBackupMetadataFile, FileBackupsDevice, FileBackupsMapping } from '@standardnotes/files'
+import {
+  FilesApiInterface,
+  FileBackupMetadataFile,
+  FileBackupsDevice,
+  FileBackupsMapping,
+  FileBackupRecord,
+} from '@standardnotes/files'
 import { InternalEventBusInterface } from '../Internal/InternalEventBusInterface'
 import { ItemManagerInterface } from '../Item/ItemManagerInterface'
 import { AbstractService } from '../Service/AbstractService'
@@ -11,6 +17,7 @@ import { StatusServiceInterface } from '../Status/StatusServiceInterface'
 export class FilesBackupService extends AbstractService {
   private itemsObserverDisposer: () => void
   private pendingFiles = new Set<Uuid>()
+  private mappingCache?: FileBackupsMapping['files']
 
   constructor(
     private items: ItemManagerInterface,
@@ -75,8 +82,30 @@ export class FilesBackupService extends AbstractService {
     return this.device.openFilesBackupsLocation()
   }
 
-  private async getBackupsMapping(): Promise<FileBackupsMapping['files']> {
-    return (await this.device.getFilesBackupsMappingFile()).files
+  private async getBackupsMappingFromDisk(): Promise<FileBackupsMapping['files']> {
+    const result = (await this.device.getFilesBackupsMappingFile()).files
+
+    this.mappingCache = result
+
+    return result
+  }
+
+  private invalidateMappingCache(): void {
+    this.mappingCache = undefined
+  }
+
+  private async getBackupsMappingFromCache(): Promise<FileBackupsMapping['files']> {
+    return this.mappingCache ?? (await this.getBackupsMappingFromDisk())
+  }
+
+  public async getFileBackupInfo(file: FileItem): Promise<FileBackupRecord | undefined> {
+    const mapping = await this.getBackupsMappingFromCache()
+    const record = mapping[file.uuid]
+    return record
+  }
+
+  public async openFileBackup(record: FileBackupRecord): Promise<void> {
+    await this.device.openFileBackup(record)
   }
 
   private async handleChangedFiles(files: FileItem[]): Promise<void> {
@@ -88,7 +117,7 @@ export class FilesBackupService extends AbstractService {
       return
     }
 
-    const mapping = await this.getBackupsMapping()
+    const mapping = await this.getBackupsMappingFromDisk()
 
     for (const file of files) {
       if (this.pendingFiles.has(file.uuid)) {
@@ -105,6 +134,8 @@ export class FilesBackupService extends AbstractService {
         this.pendingFiles.delete(file.uuid)
       }
     }
+
+    this.invalidateMappingCache()
   }
 
   private async performBackupOperation(file: FileItem): Promise<'success' | 'failed' | 'aborted'> {