AppModule.java

package io.github.droidkaigi.confsched.di;

import com.google.android.gms.analytics.GoogleAnalytics;
import com.google.android.gms.analytics.Tracker;

import com.github.gfx.android.orma.AccessThreadConstraint;
import com.github.gfx.android.orma.migration.ManualStepMigration;

import android.app.Application;
import android.content.Context;
import android.content.SharedPreferences;
import android.net.ConnectivityManager;
import android.support.annotation.NonNull;

import java.io.File;

import javax.inject.Singleton;

import dagger.Module;
import dagger.Provides;
import io.github.droidkaigi.confsched.BuildConfig;
import io.github.droidkaigi.confsched.activity.ActivityNavigator;
import io.github.droidkaigi.confsched.api.RequestInterceptor;
import io.github.droidkaigi.confsched.model.OrmaDatabase;
import okhttp3.Cache;
import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import rx.subscriptions.CompositeSubscription;

@Module
public class AppModule {

    static final String CACHE_FILE_NAME = "okhttp.cache";
    static final long MAX_CACHE_SIZE = 4 * 1024 * 1024;
    static final String SHARED_PREF_NAME = "preferences";

    private Context context;

    public AppModule(Application app) {
        context = app;
    }

    @Provides
    public Context provideContext() {
        return context;
    }

    @Singleton
    @Provides
    public Tracker provideGoogleAnalyticsTracker(Context context) {
        GoogleAnalytics ga = GoogleAnalytics.getInstance(context);
        Tracker tracker = ga.newTracker(BuildConfig.GA_TRACKING_ID);
        tracker.enableAdvertisingIdCollection(true);
        tracker.enableExceptionReporting(true);
        return tracker;
    }

    @Provides
    public ConnectivityManager provideConnectivityManager(Context context) {
        return (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    }

    @Singleton
    @Provides
    public OkHttpClient provideHttpClient(Context context, Interceptor interceptor) {
        File cacheDir = new File(context.getCacheDir(), CACHE_FILE_NAME);
        Cache cache = new Cache(cacheDir, MAX_CACHE_SIZE);

        OkHttpClient.Builder c = new OkHttpClient.Builder()
                .cache(cache)
                .addInterceptor(interceptor);

        return c.build();
    }

    @Provides
    public Interceptor provideRequestInterceptor(ConnectivityManager connectivityManager) {
        return new RequestInterceptor(connectivityManager);
    }

    @Provides
    public SharedPreferences provideSharedPreferences(Context context) {
        return context.getSharedPreferences(SHARED_PREF_NAME, Context.MODE_PRIVATE);
    }

    @Provides
    public CompositeSubscription provideCompositeSubscription() {
        return new CompositeSubscription();
    }

    @Singleton
    @Provides
    public OrmaDatabase provideOrmaDatabase(Context context) {
        return OrmaDatabase.builder(context)
                .migrationStep(115, new ManualStepMigration.ChangeStep() {
                    @Override
                    public void change(@NonNull ManualStepMigration.Helper helper) {
                        helper.renameColumn("Session", "placeId", "place");
                        helper.renameColumn("Session", "speakerId", "speaker");
                        helper.renameColumn("Session", "categoryId", "category");
                    }
                })
                .writeOnMainThread(AccessThreadConstraint.WARNING)
                .build();
    }

    @Singleton
    @Provides
    public ActivityNavigator provideActivityNavigator() {
        return new ActivityNavigator();
    }

}