换源优化

app/src/main/java/io/legado/app/data/entities/Book.kt

@@ -5,6 +5,7 @@ import androidx.room.Entity
 import androidx.room.Ignore
 import androidx.room.Index
 import androidx.room.PrimaryKey
+import io.legado.app.App
 import io.legado.app.constant.AppPattern
 import io.legado.app.constant.BookType
 import io.legado.app.utils.GSON
@@ -134,10 +135,12 @@ data class Book(
         }
     }
 
-    fun changeSource(newBook: Book) {
+    fun changeTo(newBook: Book) {
         newBook.group = group
         newBook.order = order
         newBook.customCoverUrl = customCoverUrl
         newBook.canUpdate = canUpdate
+        App.db.bookDao().delete(this)
+        App.db.bookDao().insert(newBook)
     }
 }

app/src/main/java/io/legado/app/ui/book/info/BookInfoViewModel.kt

@@ -134,11 +134,7 @@ class BookInfoViewModel(application: Application) : BaseViewModel(application) {
     fun changeTo(newBook: Book) {
         execute {
             if (inBookshelf) {
-                bookData.value?.let {
-                    it.changeSource(newBook)
-                    App.db.bookDao().delete(it)
-                }
-                App.db.bookDao().insert(newBook)
+                bookData.value?.changeTo(newBook)
             }
             bookData.postValue(newBook)
             if (newBook.tocUrl.isEmpty()) {

app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt

@@ -149,17 +149,13 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
     fun changeTo(newBook: Book) {
         execute {
             ReadBook.upMsg(null)
-            ReadBook.book?.let {
-                it.changeSource(newBook)
-                App.db.bookDao().delete(it)
-            }
+            ReadBook.book?.changeTo(newBook)
             ReadBook.prevTextChapter = null
             ReadBook.curTextChapter = null
             ReadBook.nextTextChapter = null
             withContext(Main) {
                 ReadBook.callBack?.upContent()
             }
-            App.db.bookDao().insert(newBook)
             ReadBook.book = newBook
             App.db.bookSourceDao().getBookSource(newBook.origin)?.let {
                 ReadBook.webBook = WebBook(it)