feat: 优化

app/src/main/java/io/legado/app/ui/rss/article/RssArticlesViewModel.kt

@@ -5,6 +5,7 @@ import android.os.Bundle
 import androidx.lifecycle.MutableLiveData
 import io.legado.app.App
 import io.legado.app.base.BaseViewModel
+import io.legado.app.data.entities.RssArticle
 import io.legado.app.data.entities.RssSource
 import io.legado.app.model.Rss
 import kotlinx.coroutines.Dispatchers
@@ -58,15 +59,26 @@ class RssArticlesViewModel(application: Application) : BaseViewModel(application
             Rss.getArticles(sortName, pageUrl, rssSource, pageUrl)
                 .onSuccess(Dispatchers.IO) {
                     nextPageUrl = it.nextPageUrl
-                    it.articles.let { list ->
+                    loadMoreSuccess(it.articles)
+                }
+                .onError {
+                    loadFinally.postValue(false)
+                }
+        } else {
+            loadFinally.postValue(false)
+        }
+    }
+
+    private fun loadMoreSuccess(articles: MutableList<RssArticle>) {
+        articles.let { list ->
             if (list.isEmpty()) {
                 loadFinally.postValue(false)
                 return@let
             }
             val firstArticle = list.first()
-                        if (App.db.rssArticleDao()
-                                .get(firstArticle.origin, firstArticle.link) != null
-                        ) {
+            val dbArticle = App.db.rssArticleDao()
+                .get(firstArticle.origin, firstArticle.link)
+            if (dbArticle != null) {
                 loadFinally.postValue(false)
             } else {
                 list.forEach { rssArticle ->
@@ -77,13 +89,5 @@ class RssArticlesViewModel(application: Application) : BaseViewModel(application
         }
         isLoading = false
     }
-                .onError {
-                    loadFinally.postValue(false)
-                }
-        } else {
-            loadFinally.postValue(false)
-        }
-    }
-
 
 }