Load more mangas on scroll

app/src/main/java/eu/kanade/mangafeed/data/helpers/DatabaseHelper.java

@@ -102,6 +102,11 @@ public class DatabaseHelper implements MangaManager, ChapterManager {
         return mMangaManager.getManga(id);
     }
 
+    @Override
+    public Manga getMangaBlock(String url) {
+        return mMangaManager.getMangaBlock(url);
+    }
+
     @Override
     public Observable<PutResult> insertManga(Manga manga) {
         return mMangaManager.insertManga(manga);
@@ -112,6 +117,11 @@ public class DatabaseHelper implements MangaManager, ChapterManager {
         return mMangaManager.insertMangas(mangas);
     }
 
+    @Override
+    public PutResult insertMangaBlock(Manga manga) {
+        return mMangaManager.insertMangaBlock(manga);
+    }
+
     @Override
     public Observable<DeleteResult> deleteManga(Manga manga) {
         return mMangaManager.deleteManga(manga);

app/src/main/java/eu/kanade/mangafeed/data/managers/MangaManager.java

@@ -20,10 +20,14 @@ public interface MangaManager {
 
     Observable<List<Manga>> getManga(int id);
 
+    Manga getMangaBlock(String url);
+
     Observable<PutResult> insertManga(Manga manga);
 
     Observable<PutResults<Manga>> insertMangas(List<Manga> mangas);
 
+    PutResult insertMangaBlock(Manga manga);
+
     Observable<DeleteResult> deleteManga(Manga manga);
 
     Observable<DeleteResults<Manga>> deleteMangas(List<Manga> mangas);

app/src/main/java/eu/kanade/mangafeed/data/managers/MangaManagerImpl.java

@@ -70,6 +70,24 @@ public class MangaManagerImpl extends BaseManager implements MangaManager {
         return null;
     }
 
+    @Override
+    public Manga getMangaBlock(String url) {
+        List<Manga> result = db.get()
+                .listOfObjects(Manga.class)
+                .withQuery(Query.builder()
+                        .table(MangasTable.TABLE)
+                        .where(MangasTable.COLUMN_URL + "=?")
+                        .whereArgs(url)
+                        .build())
+                .prepare()
+                .executeAsBlocking();
+
+        if (result.isEmpty())
+            return null;
+
+        return result.get(0);
+    }
+
     public Observable<PutResult> insertManga(Manga manga) {
         return db.put()
                 .object(manga)
@@ -84,6 +102,13 @@ public class MangaManagerImpl extends BaseManager implements MangaManager {
                 .createObservable();
     }
 
+    public PutResult insertMangaBlock(Manga manga) {
+        return db.put()
+                .object(manga)
+                .prepare()
+                .executeAsBlocking();
+    }
+
     public Observable<DeleteResult> deleteManga(Manga manga) {
         return db.delete()
                 .object(manga)

app/src/main/java/eu/kanade/mangafeed/data/tables/MangasTable.java

@@ -83,6 +83,8 @@ public class MangasTable {
                 + COLUMN_INITIALIZED + " BOOLEAN NOT NULL, "
                 + COLUMN_VIEWER + " INTEGER NOT NULL, "
                 + COLUMN_CHAPTER_ORDER + " INTEGER NOT NULL"
-                + ");";
+                + ");"
+                + "CREATE INDEX " + TABLE + "_" + COLUMN_URL + "_index ON " + TABLE + "(" + COLUMN_URL + ");";
+
     }
 }