Add an option to get unread chapters of mangas

app/src/main/java/eu/kanade/mangafeed/data/DataModule.java

@@ -6,8 +6,8 @@ import javax.inject.Singleton;
 
 import dagger.Module;
 import dagger.Provides;
-import eu.kanade.mangafeed.data.helpers.PreferencesHelper;
 import eu.kanade.mangafeed.data.helpers.DatabaseHelper;
+import eu.kanade.mangafeed.data.helpers.PreferencesHelper;
 import rx.Scheduler;
 import rx.schedulers.Schedulers;
 

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

@@ -7,15 +7,15 @@ import com.pushtorefresh.storio.sqlite.StorIOSQLite;
 import com.pushtorefresh.storio.sqlite.impl.DefaultStorIOSQLite;
 
 import eu.kanade.mangafeed.data.managers.ChapterManager;
+import eu.kanade.mangafeed.data.managers.MangaManager;
 import eu.kanade.mangafeed.data.models.Chapter;
 import eu.kanade.mangafeed.data.models.ChapterStorIOSQLiteDeleteResolver;
 import eu.kanade.mangafeed.data.models.ChapterStorIOSQLiteGetResolver;
 import eu.kanade.mangafeed.data.models.ChapterStorIOSQLitePutResolver;
 import eu.kanade.mangafeed.data.models.Manga;
 import eu.kanade.mangafeed.data.models.MangaStorIOSQLiteDeleteResolver;
-import eu.kanade.mangafeed.data.models.MangaStorIOSQLiteGetResolver;
 import eu.kanade.mangafeed.data.models.MangaStorIOSQLitePutResolver;
-import eu.kanade.mangafeed.data.managers.MangaManager;
+import eu.kanade.mangafeed.data.resolvers.MangaWithUnreadGetResolver;
 
 public class DatabaseHelper {
 
@@ -24,11 +24,12 @@ public class DatabaseHelper {
     public ChapterManager chapter;
 
     public DatabaseHelper(Context context) {
+
         db = DefaultStorIOSQLite.builder()
                 .sqliteOpenHelper(new DbOpenHelper(context))
                 .addTypeMapping(Manga.class, SQLiteTypeMapping.<Manga>builder()
                         .putResolver(new MangaStorIOSQLitePutResolver())
-                        .getResolver(new MangaStorIOSQLiteGetResolver())
+                        .getResolver(new MangaWithUnreadGetResolver())
                         .deleteResolver(new MangaStorIOSQLiteDeleteResolver())
                         .build())
                 .addTypeMapping(Chapter.class, SQLiteTypeMapping.<Chapter>builder()

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

@@ -3,10 +3,12 @@ package eu.kanade.mangafeed.data.managers;
 import com.pushtorefresh.storio.sqlite.StorIOSQLite;
 import com.pushtorefresh.storio.sqlite.operations.put.PutResult;
 import com.pushtorefresh.storio.sqlite.queries.Query;
+import com.pushtorefresh.storio.sqlite.queries.RawQuery;
 
 import java.util.List;
 
 import eu.kanade.mangafeed.data.models.Manga;
+import eu.kanade.mangafeed.data.tables.ChaptersTable;
 import eu.kanade.mangafeed.data.tables.MangasTable;
 import rx.Observable;
 
@@ -16,6 +18,18 @@ public class MangaManager extends BaseManager {
         super(db);
     }
 
+    private final String mangasWithUnreadQuery = String.format(
+            "SELECT %1$s.*, COUNT(C.%4$s) AS %5$s FROM %1$s LEFT JOIN " +
+            "(SELECT %4$s FROM %2$s WHERE %6$s = 0) AS C ON %3$s = C.%4$s " +
+            "GROUP BY %3$s",
+            MangasTable.TABLE,
+            ChaptersTable.TABLE,
+            MangasTable.TABLE + "." + MangasTable.COLUMN_ID,
+            ChaptersTable.COLUMN_MANGA_ID,
+            MangasTable.COLUMN_UNREAD,
+            ChaptersTable.COLUMN_READ
+    );
+
     public Observable<List<Manga>> get() {
         return db.get()
                 .listOfObjects(Manga.class)
@@ -26,6 +40,17 @@ public class MangaManager extends BaseManager {
                 .createObservable();
     }
 
+    public Observable<List<Manga>> getWithUnread() {
+        return db.get()
+                .listOfObjects(Manga.class)
+                .withQuery(RawQuery.builder()
+                        .query(mangasWithUnreadQuery)
+                        .observesTables(MangasTable.TABLE, ChaptersTable.TABLE)
+                        .build())
+                .prepare()
+                .createObservable();
+    }
+
     public Observable<PutResult> insert(Manga manga) {
         return db.put()
                 .object(manga)
@@ -34,7 +59,15 @@ public class MangaManager extends BaseManager {
     }
 
     public void createDummyManga() {
+        insert(createDummyManga("One Piece")).subscribe();
+        insert(createDummyManga("Übel Blatt")).subscribe();
+        insert(createDummyManga("Berserk")).subscribe();
+        insert(createDummyManga("Horimiya")).subscribe();
+    }
+
+    private Manga createDummyManga(String title) {
         Manga m = new Manga();
+        m.title = title;
         m.url="http://example.com";
         m.artist="Eiichiro Oda";
         m.author="Eiichiro Oda";
@@ -42,8 +75,7 @@ public class MangaManager extends BaseManager {
         m.genre="Action, Drama";
         m.status="Ongoing";
         m.thumbnail_url="http://example.com/pic.png";
-        m.title="One Piece";
-        insert(m).subscribe();
+        return m;
     }
 
 }

app/src/main/java/eu/kanade/mangafeed/data/models/Manga.java

@@ -70,12 +70,36 @@ public class Manga {
     @StorIOSQLiteColumn(name = MangasTable.COLUMN_CHAPTER_ORDER)
     public int chapter_order;
 
+    @NonNull
+    public int unread = 0;
+
     public Manga() {}
 
     public Manga(String title) {
         this.title = title;
     }
 
+    public Manga(long id, String title, String author, String artist, String url,
+                 String description, String genre, String status, int rank,
+                 String thumbnail_url) {
+        this.id = id;
+        this.title = title;
+        this.author = author;
+        this.artist = artist;
+        this.url = url;
+        this.description = description;
+        this.genre = genre;
+        this.status = status;
+        this.rank = rank;
+        this.thumbnail_url = thumbnail_url;
+    }
+
+    public static Manga newManga(long id, String title, String author, String artist, String url,
+                                 String description, String genre, String status, int rank,
+                                 String thumbnail_url) {
+        return new Manga(id, title, author, artist, url, description, genre, status, rank, thumbnail_url);
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;

app/src/main/java/eu/kanade/mangafeed/data/resolvers/MangaWithUnreadGetResolver.java

@@ -0,0 +1,22 @@
+package eu.kanade.mangafeed.data.resolvers;
+
+import android.database.Cursor;
+import android.support.annotation.NonNull;
+
+import eu.kanade.mangafeed.data.models.Manga;
+import eu.kanade.mangafeed.data.models.MangaStorIOSQLiteGetResolver;
+import eu.kanade.mangafeed.data.tables.MangasTable;
+
+
+public class MangaWithUnreadGetResolver extends MangaStorIOSQLiteGetResolver {
+
+    @Override
+    public Manga mapFromCursor(@NonNull Cursor cursor) {
+        Manga manga = super.mapFromCursor(cursor);
+        int unreadColumn = cursor.getColumnIndex(MangasTable.COLUMN_UNREAD);
+        if (unreadColumn != -1)
+            manga.unread = cursor.getInt(unreadColumn);
+        return manga;
+    }
+
+}

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

@@ -55,6 +55,9 @@ public class MangasTable {
     @NonNull
     public static final String COLUMN_CHAPTER_ORDER = "chapter_order";
 
+    @NonNull
+    public static final String COLUMN_UNREAD = "unread";
+
     // This is just class with Meta Data, we don't need instances
     private MangasTable() {
         throw new IllegalStateException("No instances please");

app/src/main/java/eu/kanade/mangafeed/presenter/LibraryPresenter.java

@@ -45,8 +45,7 @@ public class LibraryPresenter extends BasePresenter {
     }
 
     public void initializeMangas() {
-
-        db.manga.get()
+        db.manga.getWithUnread()
                 .observeOn(mainThread())
                 .subscribe(mangas -> {
                     adapter = new LibraryAdapter<>(view.getActivity(), mangas);