refactor: importer service (#2674)

packages/ui-services/src/Import/Converter.ts

@@ -0,0 +1,41 @@
+import { NoteType } from '@standardnotes/features'
+import { DecryptedTransferPayload, ItemContent, NoteContent, TagContent } from '@standardnotes/models'
+
+export interface Converter {
+  getImportType(): string
+
+  getSupportedFileTypes?: () => string[]
+  getFileExtension?: () => string
+
+  isContentValid: (content: string) => boolean
+
+  convert(
+    file: File,
+    dependencies: {
+      createNote: CreateNoteFn
+      createTag: CreateTagFn
+      canUseSuper: boolean
+      convertHTMLToSuper: (html: string) => string
+      convertMarkdownToSuper: (markdown: string) => string
+      readFileAsText: (file: File) => Promise<string>
+    },
+  ): Promise<DecryptedTransferPayload<ItemContent>[]>
+}
+
+export type CreateNoteFn = (options: {
+  createdAt: Date
+  updatedAt: Date
+  title: string
+  text: string
+  noteType?: NoteType
+  archived?: boolean
+  pinned?: boolean
+  trashed?: boolean
+  editorIdentifier?: NoteContent['editorIdentifier']
+}) => DecryptedTransferPayload<NoteContent>
+
+export type CreateTagFn = (options: {
+  createdAt: Date
+  updatedAt: Date
+  title: string
+}) => DecryptedTransferPayload<TagContent>