Show batoto staff notice if updating chapters failed

app/src/main/java/eu/kanade/tachiyomi/data/source/base/Source.java

@@ -34,6 +34,8 @@ public abstract class Source extends BaseSource {
     protected Headers requestHeaders;
     protected LazyHeaders glideHeaders;
 
+    protected String lastError;
+
     public Source() {}
 
     public Source(Context context) {
@@ -88,7 +90,7 @@ public abstract class Source extends BaseSource {
                     List<Chapter> chapters = parseHtmlToChapters(unparsedHtml);
                     return !chapters.isEmpty() ?
                             Observable.just(chapters) :
-                            Observable.error(new Exception("No chapters found"));
+                            Observable.error(new Exception((getLastError().equals("")) ? "No chapters found" : getLastError()));
                 });
     }
 
@@ -216,4 +218,7 @@ public abstract class Source extends BaseSource {
         return glideHeaders;
     }
 
+    public String getLastError() {
+        return lastError;
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/data/source/online/english/Batoto.java

@@ -24,6 +24,7 @@ import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.database.models.Chapter;
 import eu.kanade.tachiyomi.data.database.models.Manga;
 import eu.kanade.tachiyomi.data.source.SourceManager;
@@ -31,6 +32,7 @@ import eu.kanade.tachiyomi.data.source.base.LoginSource;
 import eu.kanade.tachiyomi.data.source.model.MangasPage;
 import eu.kanade.tachiyomi.data.source.model.Page;
 import eu.kanade.tachiyomi.util.Parser;
+import eu.kanade.tachiyomi.util.ToastUtil;
 import okhttp3.FormBody;
 import okhttp3.Headers;
 import okhttp3.Response;
@@ -47,6 +49,8 @@ public class Batoto extends LoginSource {
     public static final String MANGA_URL = "/comic_pop?id=%s";
     public static final String LOGIN_URL = BASE_URL + "/forums/index.php?app=core&module=global&section=login";
 
+    public static final Pattern staffNotice = Pattern.compile("=+Batoto Staff Notice=+([^=]+)=+", Pattern.CASE_INSENSITIVE);
+
     private Pattern datePattern;
     private Map<String, Integer> dateFields;
 
@@ -204,6 +208,13 @@ public class Batoto extends LoginSource {
 
     @Override
     protected List<Chapter> parseHtmlToChapters(String unparsedHtml) {
+        Matcher matcher = staffNotice.matcher(unparsedHtml);
+        if (matcher.find()) {
+            this.lastError = matcher.group(1);
+        } else {
+            lastError = "";
+        }
+
         Document parsedDocument = Jsoup.parse(unparsedHtml);
 
         List<Chapter> chapterList = new ArrayList<>();

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersFragment.java

@@ -161,9 +161,9 @@ public class ChaptersFragment extends BaseRxFragment<ChaptersPresenter> implemen
         swipeRefresh.setRefreshing(false);
     }
 
-    public void onFetchChaptersError() {
+    public void onFetchChaptersError(Throwable error) {
         swipeRefresh.setRefreshing(false);
-        ToastUtil.showShort(getContext(), R.string.fetch_chapters_error);
+        ToastUtil.showShort(getContext(), error.getMessage());
     }
 
     public boolean isCatalogueManga() {

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersPresenter.java

@@ -67,7 +67,7 @@ public class ChaptersPresenter extends BasePresenter<ChaptersFragment> {
         startableFirst(FETCH_CHAPTERS,
                 this::getOnlineChaptersObs,
                 (view, result) -> view.onFetchChaptersDone(),
-                (view, error) -> view.onFetchChaptersError());
+                (view, error) -> view.onFetchChaptersError(error));
 
         startableLatestCache(CHAPTER_STATUS_CHANGES,
                 this::getChapterStatusObs,