up

app/src/main/java/io/legado/app/help/BookHelp.kt

@@ -12,7 +12,11 @@ import java.nio.charset.StandardCharsets
 
 object BookHelp {
 
-    var downloadPath = App.INSTANCE.getPrefString("downloadPath") ?: App.INSTANCE.getExternalFilesDir(null)
+    private var downloadPath = App.INSTANCE.getPrefString("downloadPath") ?: App.INSTANCE.getExternalFilesDir(null)
+
+    fun upDownloadPath() {
+        downloadPath = App.INSTANCE.getPrefString("downloadPath") ?: App.INSTANCE.getExternalFilesDir(null)
+    }
 
     fun saveContent(book: Book, bookChapter: BookChapter, content: String) {
         if (content.isEmpty()) {

app/src/main/java/io/legado/app/ui/readbook/ReadBookViewModel.kt

@@ -7,13 +7,16 @@ import io.legado.app.App
 import io.legado.app.base.BaseViewModel
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookSource
+import io.legado.app.help.BookHelp
 import io.legado.app.model.WebBook
+import kotlinx.coroutines.Dispatchers.IO
 
 class ReadBookViewModel(application: Application) : BaseViewModel(application) {
 
     var book: Book? = null
     var bookSource: BookSource? = null
     var chapterMaxIndex = MediatorLiveData<Int>()
+    var webBook: WebBook? = null
 
     fun initData(intent: Intent) {
         val bookUrl = intent.getStringExtra("bookUrl")
@@ -21,25 +24,36 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
             execute {
                 book = App.db.bookDao().getBook(bookUrl)
                 book?.let { book ->
+                    bookSource = App.db.bookSourceDao().getBookSource(book.origin)
+                    bookSource?.let {
+                        webBook = WebBook(it)
                         val count = App.db.bookChapterDao().getChapterCount(bookUrl)
                         if (count == 0) {
-                        App.db.bookSourceDao().getBookSource(book.origin)?.let {
+                            webBook?.getChapterList(book)
-                            WebBook(it).getChapterList(book)
+                                ?.onSuccess { cList ->
-                                .onSuccess { cList ->
                                     cList?.let {
                                         App.db.bookChapterDao().insert(*cList.toTypedArray())
                                     }
                                 }
-                        } ?: let {
-
-                        }
                         } else {
                             chapterMaxIndex.postValue(count)
                         }
                     }
+                }
 
             }
         }
     }
 
+
+    fun download(book: Book, index: Int) {
+        App.db.bookChapterDao().getChapter(book.bookUrl, index)?.let { chapter ->
+            webBook?.getContent(book, chapter)
+                ?.onSuccess(IO) { content ->
+                    content?.let {
+                        BookHelp.saveContent(book, chapter, it)
+                    }
+                }
+        }
+    }
 }