package com.example.scannrmobile;
 
import android.os.AsyncTask;
 
import org.apache.http.client.methods.*;
import java.io.BufferedReader;
import java.io.InputStreamReader;
 
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
 
import org.json.*;
import android.util.Log;
 
 
//http://www.accella.net/android-http-get-json/
public class HttpTask extends AsyncTask<HttpUriRequest,Void,JSONArray> {
    private static final String TAG = "Scannr_HTTP_TASK";
 
    @Override
    protected JSONArray doInBackground(HttpUriRequest...params) {
 
        // Performed on Background Thread
 
        HttpUriRequest request = params[0];
        HttpClient client = new DefaultHttpClient();
 
        try {
            // The UI Thread shouldn't be blocked long enough to do the reading in of the stream.
            HttpResponse response =  client.execute(request);
 
// TODO handle bad response codes (such as 404, etc)
 
            BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8"));
            StringBuilder builder = new StringBuilder();
            for (String line = null; (line = reader.readLine()) != null; ) {
                builder.append(line).append("\n");
            }
            JSONTokener tokener = new JSONTokener(builder.toString());
            JSONArray json = new JSONArray(tokener);
            return json;
 
        } catch (Exception e) {
            // TODO handle different exception cases
            Log.e(TAG,e.toString());
            e.printStackTrace();
            return null;
        }
    }
 
    @Override
    protected void onPostExecute(JSONArray json) {
        // Done on UI Thread
        if(json != null) {
            taskHandler.taskSuccessful(json);
        } else {
            taskHandler.taskFailed();
        }
    }
 
    public static interface HttpTaskHandler {
        void taskSuccessful(JSONArray json);
        void taskFailed();
    }
 
    HttpTaskHandler taskHandler;
 
    public void setTaskHandler(HttpTaskHandler taskHandler) {
        this.taskHandler = taskHandler;
    }
 
}