using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
 
public class NetworkService : MonoBehaviour
{
    private const string xmlApi = "http://a...content-available-to-author-only...p.org/data/2.5/weather?q=Chicago,us&mode=xml";
    private const string webImage = "http://u...content-available-to-author-only...a.org/wikipedia/commons/c/c5/Moraine_Lake_17092005.jpg";
 
    private bool IsResponseValid(WWW www)
    {
        if(!string.IsNullOrEmpty(www.error))
        {
            Debug.Log("bad connection");
 
            return false;
        }
 
        else if(string.IsNullOrEmpty(www.text))
        {
            Debug.Log("bad data");
 
            return false;
        }
 
        else
        {
            //all good
            return true;
        }
    }
 
    private IEnumerator CallAPI (string url, Action<string> callback)
    {
        WWW www = new WWW(url);
 
        yield return www;
 
        if(!IsResponseValid(www))
        {
            yield break;
        }
 
        callback(www.text);
    }
 
    public IEnumerator GetWeatherXML(Action<string> callback)
    {
        return CallAPI(xmlApi, callback);
    }
 
    public IEnumerator DownloadImage(Action<Texture2D> callback)
    {
        WWW www = new WWW(webImage);
 
        yield return www;
 
        callback(www.texture);
    }
 
    // Use this for initialization
    void Start ()
    {
 
    }
 
    // Update is called once per frame
    void Update ()
    {
 
    }
}

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