tpakis

<?php

    if (!isset($_GET['user'])) {
        if (!isset($_GET['hashtag'])) {
            exit('Not a valid RSS feed. You didn\'nt provide an Instagram user or hashtag. Send one via a GET variable. Example .../instarss.php?user=snoopdogg');
        }
    }

    if (isset($_GET['user']) && isset($_GET['hashtag'])) {
        exit('Don\'t request both user and hashtag. Request one or the other.');

tpakis

<?xml version="1.0" encoding="utf-8"?>
<resources>

<!-- google's material design colours from 
http://www.google.com/design/spec/style/color.html#color-ui-color-palette -->

    <!--reds-->
    <color name="md_red_50">#FFEBEE</color>
    <color name="md_red_100">#FFCDD2</color>
    <color name="md_red_200">#EF9A9A</color>

tpakis

package com.example.android.cookies;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity {

tpakis

package com.example.android.menu;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity {

tpakis

/*
 * Copyright (C) 2017 The Android Open Source Project
 */
//a generic wrapper class that describes a data with a status
public class Resource<T> {
    @NonNull
    public final Status status;
    @Nullable
    public final T data;
    @Nullable public final String message;

tpakis

 //couple the activity with the view model
 viewModel = ViewModelProviders.of(this).get(MainActivityViewModel.class);
 //subscribe to LiveData
        viewModel.getRecipesListObservable().observe(MainActivity.this, new Observer<Resource<List<Recipe>>>() {
           @Override
           public void onChanged(@Nullable Resource<List<Recipe>> recipes) {
              Timber.d(recipes.status.toString());
           }
       });
       //ask the viewmodel for data (maybe an event happened?or onCreate?)

tpakis

 public void getData(){
        mRepository.fetchData();
    }

tpakis

 public void fetchData(){
        List<Recipe> loadingList = null;
        if (recipesListObservable.getValue()!=null){
            loadingList=recipesListObservable.getValue().data;
        }
        recipesListObservable.setValue(Resource.loading(loadingList));
        loadAllRecipesFromDB();
        getRecipesFromWeb();
    }

tpakis

 private void loadAllRecipesFromDB() {
        Timber.d("loadAllRecipesFromDB");
        new AsyncTask<Void, Void, List<Recipe>>() {
            @Override
            protected List<Recipe> doInBackground(Void...a) {
                return recipesDAO.getAllEntries();
            }

            @Override
            protected void onPostExecute(List<Recipe> results) {

tpakis

 private void getRecipesFromWeb(){
        Timber.d("getRecipesFromWeb");
        recipeApi.getRecipesFromWeb().enqueue(new Callback<List<Recipe>>() {
            @Override
            public void onResponse(Call<List<Recipe>> call, Response<List<Recipe>> response) {
                if (response.isSuccessful()) {
                    setRecipesListObservableStatus(Status.SUCCESS,null);
                    addRecipesToDB(response.body());
                } else {
                    // error case