com.dmsl.anyplace.tasks.FetchPoiByPuidTask.java Source code

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Here is the source code for com.dmsl.anyplace.tasks.FetchPoiByPuidTask.java

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/*
* AnyPlace: A free and open Indoor Navigation Service with superb accuracy!
*
* Anyplace is a first-of-a-kind indoor information service offering GPS-less
* localization, navigation and search inside buildings using ordinary smartphones.
*
* Author(s): Timotheos Constambeys, Lambros Petrou
* 
* Supervisor: Demetrios Zeinalipour-Yazti
*
* URL: http://anyplace.cs.ucy.ac.cy
* Contact: anyplace@cs.ucy.ac.cy
*
* Copyright (c) 2015, Data Management Systems Lab (DMSL), University of Cyprus.
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in the
* Software without restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the
* following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/

package com.dmsl.anyplace.tasks;

import java.net.SocketTimeoutException;
import org.apache.http.conn.ConnectTimeoutException;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.AsyncTask;

import com.dmsl.anyplace.AnyplaceAPI;
import com.dmsl.anyplace.nav.PoisModel;
import com.dmsl.anyplace.utils.NetworkUtils;

/**
 * Returns the POIs according to a given Building and Floor
 *
 */
public class FetchPoiByPuidTask extends AsyncTask<Void, Void, String> {

    public interface FetchPoiListener {
        void onErrorOrCancel(String result);

        void onSuccess(String result, PoisModel poi);
    }

    private FetchPoiListener mListener;
    private Context mCtx;

    private String puid;
    private PoisModel poi;

    private ProgressDialog dialog;
    private boolean success = false;

    public FetchPoiByPuidTask(FetchPoiListener l, Context ctx, String puid) {
        this.mCtx = ctx;
        this.mListener = l;
        this.puid = puid;
    }

    @Override
    protected void onPreExecute() {
        dialog = new ProgressDialog(mCtx);
        dialog.setIndeterminate(true);
        dialog.setTitle("Fetching POI Info");
        dialog.setMessage("Please be patient...");
        dialog.setCancelable(true);
        dialog.setCanceledOnTouchOutside(false);
        dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
            @Override
            public void onCancel(DialogInterface dialog) {
                FetchPoiByPuidTask.this.cancel(true);
            }
        });
        dialog.show();
    }

    @Override
    protected String doInBackground(Void... params) {
        if (!NetworkUtils.isOnline(mCtx)) {
            return "No connection available!";
        }

        try {
            JSONObject j = new JSONObject();
            try {
                j.put("username", "username");
                j.put("password", "pass");

                j.put("pois", this.puid);
            } catch (JSONException e) {
                return "Error Message: Could not create the request for the POIs!";
            }

            // fetch the pois of this floor
            String response = NetworkUtils.downloadHttpClientJsonPost(AnyplaceAPI.getFetchPoisByPuidUrl(),
                    j.toString());
            // fetch the pois for the whole building
            // String response = NetworkUtils.downloadHttpClientJsonPost(
            // AnyplaceAPI.getFetchPoisByBuidUrl(),j.toString());

            JSONObject json = new JSONObject(response);
            if (json.has("status") && json.getString("status").equalsIgnoreCase("error")) {
                return "Error Message: " + json.getString("message");
            }

            // process the buildings received
            poi = new PoisModel();
            poi.lat = json.getString("coordinates_lat");
            poi.lng = json.getString("coordinates_lon");
            poi.buid = json.getString("buid");
            poi.floor_name = json.getString("floor_name");
            poi.floor_number = json.getString("floor_number");
            poi.description = json.getString("description");
            poi.name = json.getString("name");
            poi.pois_type = json.getString("pois_type");
            poi.puid = json.getString("puid");
            poi.is_building_entrance = json.getBoolean("is_building_entrance");

            success = true;
            return "Successfully fetched Points of Interest";

        } catch (ConnectTimeoutException e) {
            return "Connecting to Anyplace service is taking too long!";
        } catch (SocketTimeoutException e) {
            return "Communication with the server is taking too long!";
        } catch (JSONException e) {
            return "Not valid response from the server! Contact the admin.";
        } catch (Exception e) {
            return "Error fetching Point of Interest. Exception[ " + e.getMessage() + " ]";
        }
    }

    @Override
    protected void onPostExecute(String result) {
        dialog.dismiss();

        if (success) {
            mListener.onSuccess(result, poi);
        } else {
            mListener.onErrorOrCancel(result);
        }
    }

    @Override
    protected void onCancelled(String result) {
        dialog.dismiss();
        mListener.onErrorOrCancel(result);
    }

    @Override
    protected void onCancelled() {
        dialog.dismiss();
        mListener.onErrorOrCancel("Fetching POI was cancelled!");
    }

} // end of fetch POIS by building and floor