2019-pracownia-programowania-projekt/Lookify/app/src/main/java/com/example/lookifyv2/Favourites.java

package com.example.lookifyv2;

import android.annotation.SuppressLint;
import android.content.SharedPreferences;
import android.graphics.PorterDuff;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.google.common.collect.Lists;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class Favourites extends AppCompatActivity {

    List<Product> products;
    List<Product> favourites;
    RecyclerView recyclerView;
    GridLayoutManager gridLayout;
    FavouritesAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_favourites);

        //Do strzałki powrotu w górnej części ekranu.
        assert getSupportActionBar() != null;
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        CheckInternet check = new CheckInternet();
        if(!check.isOnline()){
            TextView nointernetmessage = findViewById(R.id.nointernetmessage);
            nointernetmessage.setVisibility(View.VISIBLE);

            Button button_refresh;
            button_refresh = findViewById(R.id.refresh_button);
            button_refresh.getBackground().setColorFilter(0xFFFFFFFF, PorterDuff.Mode.MULTIPLY);
            button_refresh.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    recreate();
                }
            });
            button_refresh.setVisibility(View.VISIBLE);
        }

        recyclerView = findViewById(R.id.favouriterecyclerview);
        products = new ArrayList<>();
        favourites = new ArrayList<>();
        getProductsFromDB();

        gridLayout = new GridLayoutManager(this, 2);
        recyclerView.setLayoutManager(gridLayout);

        adapter = new FavouritesAdapter(this, favourites);
        recyclerView.setAdapter(adapter);
    }

    private void getProductsFromDB() {

        @SuppressLint("StaticFieldLeak") AsyncTask<Void, Void, Void> asyncTask = new AsyncTask<Void, Void, Void>() {
            @Override
            protected Void doInBackground(Void... Void) {

                OkHttpClient client = new OkHttpClient();
                Request request = new Request.Builder().url("http://192.168.0.88/products.php?id=0").build();
                try {
                    Response response = client.newCall(request).execute();

                    JSONArray array = new JSONArray(response.body().string());

                    for (int i = 0; i < array.length(); i++) {

                        JSONObject object = array.getJSONObject(i);

                        Product product = new Product(object.getInt("id"), object.getString("product_code"),
                                object.getString("product_name"), object.getString("product_image"),
                                object.getString("product_price"), object.getString("product_retailer"),
                                object.getString("product_colour"), object.getString("product_style"),
                                object.getString("product_collection"),
                                object.getString("product_type"), object.getString("product_sex"));

                        Favourites.this.products.add(product);
                    }

                } catch (IOException e) {
                    e.printStackTrace();
                } catch (JSONException e) {
                    e.printStackTrace();
                }
                return null;
            }

            @Override
            protected void onPostExecute(Void aVoid) {
                adapter.notifyDataSetChanged();

                getFavourites();
            }
        };
        asyncTask.execute();
    }

    //Z preferencji odczytywane są kody obserwowanych produktów, jeśli nie ma żadnego wyświetlana jest odpowiednia wiadomość.
    //Następnie pozycje kodów na liscie products są ustalane i za ich pomocą odpowiednie elementy tej listy kopiowane są do nowej listy z obserwowanymi.
    private void getFavourites() {
        SharedPreferences pref = MyApplication.getInstance().getSharedPreferences("Favourites", 0);
        Map<String, ?> codes = pref.getAll();
        ArrayList<String> codeslist = Lists.newArrayList(codes.keySet());
        if (codeslist.size() == 0) {
            TextView noproductsmessage = findViewById(R.id.nofavouritesmessage);
            noproductsmessage.setVisibility(View.VISIBLE);
        } else {
            for (int i = 0; i < products.size(); i++) {
                if (codeslist.size() != 0) {
                    for (int j = 0; j < codeslist.size(); j++) {
                        if (products.get(i).getproductCode().equals(codeslist.get(j))) {
                            favourites.add(products.get(i));
                            codeslist.remove(j);
                            break;
                        }
                    }
                }
                else{
                    break;
                }
            }
        }
    }

    //Kliknięcie strzałki powrotu kończy activity.
    @Override
    public boolean onSupportNavigateUp(){
        finish();
        return true;
    }
}