added Realm DB instead SharedPreferences

app/build.gradle

@@ -1,4 +1,5 @@
 apply plugin: 'com.android.application'
+apply plugin: 'realm-android'
 
 def getProperty(String filename, String propName) {
     def propsFile = rootProject.file(filename)

app/src/main/java/com/esoxjem/movieguide/AppModule.java

@@ -8,6 +8,7 @@
 
 import dagger.Module;
 import dagger.Provides;
+import io.realm.Realm;
 
 /**
  * @author arunsasidharan
@@ -36,4 +37,11 @@ public Resources provideResources(Context context)
     {
         return context.getResources();
     }
+
+    @Provides
+    @Singleton
+    public Realm provideRealm()
+    {
+        return Realm.getDefaultInstance();
+    }
 }

app/src/main/java/com/esoxjem/movieguide/BaseApplication.java

@@ -11,6 +11,8 @@
 import com.esoxjem.movieguide.network.NetworkModule;
 import com.esoxjem.movieguide.listing.sorting.SortingModule;
 
+import io.realm.Realm;
+
 /**
  * @author arun
  */
@@ -25,6 +27,7 @@ public void onCreate()
     {
         super.onCreate();
         StrictMode.enableDefaults();
+        initRealm();
         appComponent = createAppComponent();
     }
 
@@ -37,6 +40,10 @@ private AppComponent createAppComponent()
                 .build();
     }
 
+    private void initRealm(){
+        Realm.init(this);
+    }
+
     public DetailsComponent createDetailsComponent()
     {
         detailsComponent = appComponent.plus(new DetailsModule());

app/src/main/java/com/esoxjem/movieguide/favorites/FavoritesInteractorImpl.java

@@ -33,13 +33,7 @@ public boolean isFavorite(String id)
     @Override
     public List<Movie> getFavorites()
     {
-        try
-        {
-            return favoritesStore.getFavorites();
-        } catch (IOException ignored)
-        {
-            return new ArrayList<>(0);
-        }
+        return favoritesStore.getFavorites();
     }
 
     @Override

app/src/main/java/com/esoxjem/movieguide/favorites/FavoritesStore.java

@@ -1,89 +1,76 @@
 package com.esoxjem.movieguide.favorites;
 
-import android.content.Context;
-import android.content.SharedPreferences;
-import android.text.TextUtils;
-
 import com.esoxjem.movieguide.Movie;
-import com.squareup.moshi.JsonAdapter;
-import com.squareup.moshi.Moshi;
 
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Map;
 
 import javax.inject.Inject;
 
 import javax.inject.Singleton;
 
+import io.realm.Realm;
+import io.realm.RealmResults;
+
 /**
  * @author arun
  */
 @Singleton
 public class FavoritesStore
 {
-
-    private static final String PREF_NAME = "FavoritesStore";
-    private SharedPreferences pref;
+    private Realm realm;
 
     @Inject
-    public FavoritesStore(Context context)
+    public FavoritesStore(Realm realm)
     {
-        pref = context.getApplicationContext().getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
+        this.realm = realm;
     }
 
     public void setFavorite(Movie movie)
     {
-        SharedPreferences.Editor editor = pref.edit();
-        Moshi moshi = new Moshi.Builder().build();
-        JsonAdapter<Movie> jsonAdapter = moshi.adapter(Movie.class);
-        String movieJson = jsonAdapter.toJson(movie);
-        editor.putString(movie.getId(), movieJson);
-        editor.apply();
+        realm.beginTransaction();
+        realm.copyToRealmOrUpdate(new MovieRealmObject(movie));
+        realm.commitTransaction();
     }
 
     public boolean isFavorite(String id)
     {
-        String movieJson = pref.getString(id, null);
-
-        if (!TextUtils.isEmpty(movieJson))
-        {
-            return true;
-        } else
-        {
-            return false;
-        }
+        MovieRealmObject res =  realm.where(MovieRealmObject.class).equalTo(MovieRealmObject.ID, id).findFirst();
+        return res != null;
     }
 
-    public List<Movie> getFavorites() throws IOException
+    public List<Movie> getFavorites()
     {
-        Map<String, ?> allEntries = pref.getAll();
-        ArrayList<Movie> movies = new ArrayList<>(24);
-        Moshi moshi = new Moshi.Builder().build();
+        RealmResults<MovieRealmObject> res =  realm.where(MovieRealmObject.class).findAll();
+        List<Movie> movies = new ArrayList<>();
 
-        for (Map.Entry<String, ?> entry : allEntries.entrySet())
-        {
-            String movieJson = pref.getString(entry.getKey(), null);
-
-            if (!TextUtils.isEmpty(movieJson))
-            {
-                JsonAdapter<Movie> jsonAdapter = moshi.adapter(Movie.class);
-
-                Movie movie = jsonAdapter.fromJson(movieJson);
-                movies.add(movie);
-            } else
-            {
-                // Do nothing;
-            }
+        for(MovieRealmObject i : res){
+            movies.add(movieRealmObjectToMovie(i));
         }
+
         return movies;
     }
 
     public void unfavorite(String id)
     {
-        SharedPreferences.Editor editor = pref.edit();
-        editor.remove(id);
-        editor.apply();
+        realm.beginTransaction();
+        MovieRealmObject movie = realm.where(MovieRealmObject.class).equalTo(MovieRealmObject.ID, id).findFirst();
+        if(movie != null)
+            movie.deleteFromRealm();
+        realm.commitTransaction();
+    }
+
+    private Movie movieRealmObjectToMovie(MovieRealmObject movieRealmObject){
+        Movie movie = new Movie();
+        movie.setId(movieRealmObject.getId());
+        movie.setOverview(movieRealmObject.getOverview());
+        movie.setReleaseDate(movieRealmObject.getReleaseDate());
+        movie.setPosterPath(movieRealmObject.getPosterPath());
+        movie.setBackdropPath(movieRealmObject.getBackdropPath());
+        movie.setTitle(movieRealmObject.getTitle());
+        movie.setVoteAverage(movieRealmObject.getVoteAverage());
+
+        return movie;
     }
 }

app/src/main/java/com/esoxjem/movieguide/favorites/MovieRealmObject.java

@@ -0,0 +1,97 @@
+package com.esoxjem.movieguide.favorites;
+
+import com.esoxjem.movieguide.Movie;
+
+import io.realm.RealmObject;
+import io.realm.annotations.PrimaryKey;
+
+public class MovieRealmObject extends RealmObject {
+
+    @PrimaryKey
+    private String id;
+    private String overview;
+    private String releaseDate;
+    private String posterPath;
+    private String backdropPath;
+    private String title;
+    private double voteAverage;
+
+    public static final String ID = "id";
+    public static final String OVERVIEW = "overview";
+    public static final String RELEASE_DATE = "releaseDate";
+    public static final String POSTER_PATH = "posterPath";
+    public static final String BACKDROP_PATH = "backdropPath";
+    public static final String TITLE = "title";
+    public static final String VOTE_AVERAGE = "voteAverage";
+
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getOverview() {
+        return overview;
+    }
+
+    public void setOverview(String overview) {
+        this.overview = overview;
+    }
+
+    public String getReleaseDate() {
+        return releaseDate;
+    }
+
+    public void setReleaseDate(String releaseDate) {
+        this.releaseDate = releaseDate;
+    }
+
+    public String getPosterPath() {
+        return posterPath;
+    }
+
+    public void setPosterPath(String posterPath) {
+        this.posterPath = posterPath;
+    }
+
+    public String getBackdropPath() {
+        return backdropPath;
+    }
+
+    public void setBackdropPath(String backdropPath) {
+        this.backdropPath = backdropPath;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public double getVoteAverage() {
+        return voteAverage;
+    }
+
+    public void setVoteAverage(double voteAverage) {
+        this.voteAverage = voteAverage;
+    }
+
+    public MovieRealmObject(Movie movie) {
+        id = movie.getId();
+        overview = movie.getOverview();
+        releaseDate = movie.getReleaseDate();
+        posterPath = movie.getPosterPath();
+        backdropPath = movie.getBackdropPath();
+        title = movie.getTitle();
+        voteAverage = movie.getVoteAverage();
+    }
+
+    public MovieRealmObject(){
+
+    }
+}

build.gradle

@@ -7,6 +7,7 @@ buildscript {
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath "io.realm:realm-gradle-plugin:5.3.0"
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }