更新时检测webDav书籍是否比本地新,自动重新下载

app/src/main/java/io/legado/app/model/remote/RemoteBookManager.kt

@@ -2,19 +2,10 @@ package io.legado.app.model.remote
 
 import android.net.Uri
 import io.legado.app.data.entities.Book
-import kotlinx.coroutines.runBlocking
 
 abstract class RemoteBookManager {
     protected val remoteBookFolder: String = "books"
 
-    init {
-        runBlocking {
-            initRemoteContext()
-        }
-    }
-
-    abstract suspend fun initRemoteContext()
-
     /**
      * 获取书籍列表
      */
@@ -25,7 +16,7 @@ abstract class RemoteBookManager {
      * 根据书籍地址获取书籍信息
      */
     @Throws(Exception::class)
-    abstract suspend fun getRemoteBook(path: String): RemoteBook
+    abstract suspend fun getRemoteBook(path: String): RemoteBook?
 
     /**
      * @return Uri：下载到本地的路径

app/src/main/java/io/legado/app/model/remote/RemoteBookWebDav.kt

@@ -12,13 +12,21 @@ import io.legado.app.model.localBook.LocalBook
 import io.legado.app.utils.NetworkUtils
 import io.legado.app.utils.isContentScheme
 import io.legado.app.utils.readBytes
+import kotlinx.coroutines.runBlocking
 import splitties.init.appCtx
 import java.io.File
 
 object RemoteBookWebDav : RemoteBookManager() {
+
     val rootBookUrl get() = "${AppWebDav.rootWebDavUrl}${remoteBookFolder}"
 
-    override suspend fun initRemoteContext() {
+    init {
+        runBlocking {
+            initRemoteContext()
+        }
+    }
+
+    suspend fun initRemoteContext() {
         AppWebDav.authorization?.let {
             WebDav(rootBookUrl, it).makeAsDir()
         }
@@ -41,10 +49,10 @@ object RemoteBookWebDav : RemoteBookManager() {
         return remoteBooks
     }
 
-    override suspend fun getRemoteBook(path: String): RemoteBook {
+    override suspend fun getRemoteBook(path: String): RemoteBook? {
         AppWebDav.authorization?.let {
             val webDavFile = WebDav(path, it).getWebDavFile()
-                ?: throw NoStackTraceException("远程书籍不存在")
+                ?: return null
             return RemoteBook(webDavFile)
         } ?: throw NoStackTraceException("webDav没有配置")
     }

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

@@ -332,9 +332,10 @@ class BookInfoActivity :
             }
         }
         tvOrigin.setOnClickListener {
-            viewModel.bookData.value?.let {
+            viewModel.bookData.value?.let { book ->
+                if (book.isLocal) return@let
                 startActivity<BookSourceEditActivity> {
-                    putExtra("sourceUrl", it.origin)
+                    putExtra("sourceUrl", book.origin)
                 }
             } ?: toastOnUi("Book is null")
         }

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

@@ -15,12 +15,14 @@ import io.legado.app.data.entities.BookChapter
 import io.legado.app.data.entities.BookSource
 import io.legado.app.exception.NoStackTraceException
 import io.legado.app.help.book.BookHelp
+import io.legado.app.help.book.getRemoteUrl
 import io.legado.app.help.book.isLocal
 import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.model.BookCover
 import io.legado.app.model.ReadBook
 import io.legado.app.model.analyzeRule.AnalyzeRule
 import io.legado.app.model.localBook.LocalBook
+import io.legado.app.model.remote.RemoteBookWebDav
 import io.legado.app.model.webBook.WebBook
 import io.legado.app.utils.postEvent
 import io.legado.app.utils.toastOnUi
@@ -108,11 +110,24 @@ class BookInfoViewModel(application: Application) : BaseViewModel(application) {
     }
 
     fun refreshBook(book: Book) {
+        execute {
             if (book.isLocal) {
                 book.tocUrl = ""
+                book.getRemoteUrl()?.let {
+                    val remoteBook = RemoteBookWebDav.getRemoteBook(it)
+                    if (remoteBook == null) {
+
+                    } else if (remoteBook.lastModify > book.latestChapterTime) {
+
+                    }
                 }
+            }
+        }.onError {
+            AppLog.put("下载远程书籍<${book.name}>失败", it)
+        }.onFinally {
             loadBookInfo(book, false)
         }
+    }
 
     fun loadBookInfo(
         book: Book,