Android Open Source - PactrackDroid Parcel Json Parser

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright (C) 2014 Joakim Andersson/*from   w  w  w .  j  ava 2 s  .  co m*/
 * Copyright (C) 2014 blunden
 * 
 * This file is part of PactrackDroid, an Android application to keep
 * track of parcels sent with the Swedish mail service (Posten).
 * 
 * PactrackDroid is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * PactrackDroid is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package nu.firetech.android.pactrack.backend;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;

import nu.firetech.android.pactrack.R;
import nu.firetech.android.pactrack.common.Error;

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

import android.content.Context;
import android.util.Log;

/* 
 * You can get your own consumerId at 
 * http://www.postnordlogistics.se/sv/online-services/widgetsochwebservices/
 */

public class ParcelJsonParser {
  private static final String TAG = "<PactrackDroid> ParcelXMLParser";
  
  //TODO support more languages
  private static final String BASE_URL = 
      "http://logistics.postennorden.com/wsp/rest-services/ntt-service-rest/api/shipment.json?locale=sv&id=%s&consumerId=%s";

  public static final String KEY_EVENTS = "events";
  public static final String KEY_WEIGHT_UNIT = "weight_unit";
  
  private static String consumerId = null;
  
  public static void loadConsumerId(Context ctx) {
    if (consumerId == null) {
      consumerId = ctx.getString(R.string.postnord_consumerid);
    }
  }

  public static Parcel fetch(String parcelId) {
    try {
      if (consumerId == null) {
        throw new IllegalStateException("No consumerId loaded.");
      }

      ParcelJsonParser parser = new ParcelJsonParser();
      
      return parser.parse(parcelId);
    } catch (Exception e) {
      Log.d(TAG, "SERVER error", e);
      return new Parcel(Error.SERVER);
    }
  }

  ////////////////////////////////////////////////////////////////////////////////

  private ParcelJsonParser() {}
  
  private Parcel parse(String parcelId) throws Exception {
    HashMap<String,Object> data = new HashMap<String,Object>();
    
    StringBuilder jsonText = new StringBuilder();
    
    URL parcelUrl = new URL(String.format(BASE_URL, parcelId, consumerId));
    
    BufferedReader in = new BufferedReader(new InputStreamReader(parcelUrl.openStream(), "UTF-8"));
    for (String line = in.readLine(); line != null; line = in.readLine()) {
      jsonText.append(line);
    }
    in.close();
    
    JSONObject json = new JSONObject(jsonText.toString()).getJSONObject("TrackingInformationResponse");
    int error = checkError(json);
    if (error != Error.NONE) {
      return new Parcel(error);
    }
    JSONObject shipment = json.getJSONArray("shipments").getJSONObject(0), item;
    try {
      item = findItem(shipment, parcelId);
    } catch (IllegalArgumentException e) {
      return new Parcel(Error.MULTI_PARCEL);
    }
    if (item == null) {
      return new Parcel(Error.NOT_FOUND);
    }
    
    if (shipment.has("consignor")) {
      data.put(ParcelDbAdapter.KEY_CUSTOMER, shipment.getJSONObject("consignor").getString("name"));
    }
    data.put(ParcelDbAdapter.KEY_SERVICE, shipment.getJSONObject("service").getString("name"));
    data.put(ParcelDbAdapter.KEY_STATUS, shipment.getJSONObject("statusText").getString("header"));
    data.put(ParcelDbAdapter.KEY_STATUSCODE, shipment.getString("status"));
    
    if (shipment.has("totalWeight")) {
      JSONObject weight = shipment.getJSONObject("totalWeight");
      data.put(ParcelDbAdapter.KEY_WEIGHT, weight.getString("value"));
      data.put(ParcelJsonParser.KEY_WEIGHT_UNIT, weight.getString("unit"));
    }
    
    if (shipment.has("consignee")) {
      JSONObject address = shipment.getJSONObject("consignee").getJSONObject("address");
      StringBuilder postal = new StringBuilder();
      if (address.has("postCode")) {
        postal.append(address.getString("postCode"));
      }
      if (address.has("city")) {
        postal.append(" ");
        postal.append(address.getString("city"));
      }
      data.put(ParcelDbAdapter.KEY_POSTAL, postal.toString().trim());
    }

    data.put(ParcelDbAdapter.KEY_PARCEL, item.getString("itemId"));
    if (item.has("dropOffDate")) {
      data.put(ParcelDbAdapter.KEY_SENT, item.getString("dropOffDate"));
    }

    data.put(KEY_EVENTS, parseEvents(item.getJSONArray("events")));

    return new Parcel(data);
  }

  private JSONObject findItem(JSONObject shipment, String parcelId) throws JSONException, IllegalArgumentException {
    JSONArray items = shipment.getJSONArray("items");
    JSONObject item = null;
    for (int i = 0; i < items.length(); i++) {
      JSONObject thisItem = items.getJSONObject(i);
      if (thisItem.getString("itemId").equals(parcelId)) {
        if (item == null) {
          item = thisItem;
        } else {
          throw new IllegalArgumentException("Multiple items matched");
        }
      }
    }
    return item;
  }
  
  private int checkError(JSONObject json) throws JSONException {
    JSONArray shipments = json.getJSONArray("shipments");
    if (shipments.length() == 0) {
      return Error.NOT_FOUND;
    } else if (shipments.length() > 1) {
      return Error.MULTI_PARCEL;
    }
    return Error.NONE;
  }
  
  private ArrayList<HashMap<String,Object>> parseEvents(JSONArray events) throws JSONException {
    ArrayList<HashMap<String,Object>> eventList = new ArrayList<HashMap<String,Object>>();
    
    for (int i = 0; i < events.length(); i++) {
      HashMap<String,Object> eventData = new HashMap<String,Object>();
      JSONObject event = events.getJSONObject(i);

      eventData.put(ParcelDbAdapter.KEY_TIME, event.getString("eventTime"));
      eventData.put(ParcelDbAdapter.KEY_LOC, event.getJSONObject("location").getString("displayName"));
      eventData.put(ParcelDbAdapter.KEY_DESC, event.getString("eventDescription"));

      eventList.add(eventData);
    }
    
    return eventList;
  }
}

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