feat: 优化代码

app/src/main/java/io/legado/app/ui/download/DownloadViewModel.kt

@@ -3,9 +3,11 @@ package io.legado.app.ui.download
 import android.app.Application
 import android.net.Uri
 import androidx.documentfile.provider.DocumentFile
-import io.legado.app.App
 import io.legado.app.base.BaseViewModel
 import io.legado.app.data.entities.Book
+import io.legado.app.utils.FileUtils
+import io.legado.app.utils.isContentPath
+import java.io.File
 
 
 class DownloadViewModel(application: Application) : BaseViewModel(application) {
@@ -13,18 +15,30 @@ class DownloadViewModel(application: Application) : BaseViewModel(application) {
 
     fun export(path: String, book: Book) {
         execute {
+            if (path.isContentPath()) {
                 val uri = Uri.parse(path)
                 DocumentFile.fromTreeUri(context, uri)
                     ?.createFile("txt", book.name)
                     ?.let {
-                    context.contentResolver.openOutputStream(it.uri)?.let {
-                        App.db.bookChapterDao().getChapterList(book.bookUrl).forEach {
-
+                        export(it.uri, book)
                     }
+            } else {
+                FileUtils.createFolderIfNotExist(path).let {
+                    export(it, book)
                 }
             }
+        }.onError {
+            toast(it.localizedMessage ?: "ERROR")
         }
     }
 
 
+    private fun export(uri: Uri, book: Book) {
+
+    }
+
+    private fun export(file: File, book: Book) {
+
+    }
+
 }