修复自动换源的bug

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

@@ -151,11 +151,26 @@ data class Book(
         delete()
         App.db.bookDao().insert(newBook)
     }
-    
+
     fun delete() {
         if (ReadBook.book?.bookUrl == bookUrl) {
             ReadBook.book = null
         }
         App.db.bookDao().delete(this)
     }
+
+    fun upInfoFromOld(oldBook: Book?) {
+        oldBook?.let {
+            group = oldBook.group
+            durChapterIndex = oldBook.durChapterIndex
+            durChapterPos = oldBook.durChapterPos
+            durChapterTitle = oldBook.durChapterTitle
+            customCoverUrl = oldBook.customCoverUrl
+            customIntro = oldBook.customIntro
+            order = oldBook.order
+            if (coverUrl.isNullOrEmpty()) {
+                coverUrl = oldBook.getDisplayCover()
+            }
+        }
+    }
 }

app/src/main/java/io/legado/app/ui/book/changesource/ChangeSourceDialog.kt

@@ -166,19 +166,8 @@ class ChangeSourceDialog : BaseDialogFragment(),
 
     override fun changeTo(searchBook: SearchBook) {
         val book = searchBook.toBook()
-        callBack?.oldBook?.let { oldBook ->
-            book.group = oldBook.group
-            book.durChapterIndex = oldBook.durChapterIndex
-            book.durChapterPos = oldBook.durChapterPos
-            book.durChapterTitle = oldBook.durChapterTitle
-            book.customCoverUrl = oldBook.customCoverUrl
-            book.customIntro = oldBook.customIntro
-            book.order = oldBook.order
-            if (book.coverUrl.isNullOrEmpty()) {
-                book.coverUrl = oldBook.getDisplayCover()
-            }
-            callBack?.changeTo(book)
-        }
+        book.upInfoFromOld(callBack?.oldBook)
+        callBack?.changeTo(book)
         dismiss()
     }
 

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

@@ -188,7 +188,9 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
                         .searchBookSuspend(this, name, variableBook = variableBook)
                         .getOrNull(0)?.let {
                             if (it.name == name && (it.author == author || author == "")) {
-                                changeTo(it.toBook())
+                                val book = it.toBook()
+                                book.upInfoFromOld(ReadBook.book)
+                                changeTo(book)
                                 return@execute
                             }
                         }