src/com/fairphone/updater/data/VersionParserHelper.java - fp2-dev/platform/packages/apps/FairphoneUpdater - Gitiles

 /*
  * Copyright (C) 2013 Fairphone Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.fairphone.updater.data;

 import android.content.Context;
 import android.content.res.Resources;
 import android.os.Build;
 import android.os.Environment;
 import android.util.Log;
 import android.util.Pair;

 import com.fairphone.updater.R;
 import com.fairphone.updater.tools.Utils;

 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 import org.xmlpull.v1.XmlPullParserFactory;

 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.util.Locale;

 public class VersionParserHelper
 {

     private static final String TAG = VersionParserHelper.class.getSimpleName();

     private static final String CURRENT_VERSION_NUMBER = "fairphone.ota.version.number";
     private static final String CURRENT_VERSION_NAME = "fairphone.ota.version.name";
     private static final String CURRENT_VERSION_BUILD_NUMBER = "fairphone.ota.build_number";
     private static final String CURRENT_BETA_STATUS = "fairphone.ota.beta";
     private static final String CURRENT_ANDROID_VERSION = "fairphone.ota.android_version";
     private static final String CURRENT_VERSION_IMAGE_TYPE = "fairphone.ota.image_type";
     private static final String CURRENT_VERSION_BUILD_DATE = "ro.build.date.utc";
     private static final String CURRENT_VERSION_FINGERPRINT = "ro.build.fingerprint";


     private static Version version;
     public static Version getDeviceVersion(Context context)
     {
         if (version == null){
             Version versionBuilder = new Version();
             String[] suportedDevices = context.getResources().getString(R.string.knownFPDevices).split(";");
             String modelWithoutSpaces = Build.MODEL.replaceAll("\\s", "");
             boolean knownFPDevice = false;
             for(String device : suportedDevices){
                 knownFPDevice = knownFPDevice || device.equals(modelWithoutSpaces);
             }

             try
             {
                 versionBuilder.setNumber(getSystemData(context, CURRENT_VERSION_FINGERPRINT, knownFPDevice));
             } catch (NumberFormatException e)
             {
                 String defaultVersionNumber = context.getResources().getString(R.string.defaultVersionNumber);
                 Log.w(TAG, "Error parsing current version number. Defaulting to " + defaultVersionNumber + ": " + e.getLocalizedMessage());
                 versionBuilder.setNumber(defaultVersionNumber);
             }
             versionBuilder.setName(getSystemData(context, CURRENT_VERSION_NAME, knownFPDevice));
             versionBuilder.setBuildNumber(getSystemData(context, CURRENT_VERSION_BUILD_NUMBER, knownFPDevice));
             versionBuilder.setAndroidVersion(getSystemData(context, CURRENT_ANDROID_VERSION, knownFPDevice));
             versionBuilder.setImageType(getSystemData(context, CURRENT_VERSION_IMAGE_TYPE, knownFPDevice));
             versionBuilder.setReleaseDate(getSystemData(context, CURRENT_VERSION_BUILD_DATE, knownFPDevice));
             versionBuilder.setBetaStatus(getSystemData(context, CURRENT_BETA_STATUS, knownFPDevice));

             Version versionData = UpdaterData.getInstance().getVersion(versionBuilder.getImageType(), versionBuilder.getNumber());
             versionBuilder.setThumbnailLink(versionData != null ? versionData.getThumbnailLink() : "");
             versionBuilder.setReleaseNotes(Locale.getDefault().getLanguage(), versionData != null ? versionData.getReleaseNotes(Locale.getDefault().getLanguage()) : "");
             version = versionBuilder;
         }

         return version;
     }

     private static String getSystemData(Context context, String property, boolean useDefaults)
     {
 		String result;
 	    switch (property) {
 		    case CURRENT_VERSION_NUMBER:
 			    result = Utils.getprop(CURRENT_VERSION_NUMBER, useDefaults ? String.valueOf(context.getResources().getString(R.string.defaultVersionNumber)) : "");
 			    break;
 		    case CURRENT_VERSION_NAME:
 			    result = Utils.getprop(CURRENT_VERSION_NAME, useDefaults ? context.getResources().getString(R.string.defaultVersionName) : "");
 			    break;
 		    case CURRENT_ANDROID_VERSION:
 			    result = Utils.getprop(CURRENT_ANDROID_VERSION, useDefaults ? context.getResources().getString(R.string.defaultAndroidVersionNumber) : "");
 			    break;
 		    case CURRENT_VERSION_BUILD_NUMBER:
 			    result = Utils.getprop(CURRENT_VERSION_BUILD_NUMBER, useDefaults ? context.getResources().getString(R.string.defaultBuildNumber) : "");
 			    break;
 		    case CURRENT_VERSION_IMAGE_TYPE:
 			    result = Utils.getprop(CURRENT_VERSION_IMAGE_TYPE, useDefaults ? context.getResources().getString(R.string.defaultImageType) : "");
 			    break;
 		    case CURRENT_VERSION_BUILD_DATE:
 			    result = Utils.getprop(CURRENT_VERSION_BUILD_DATE, useDefaults ? context.getResources().getString(R.string.defaultBuildDate) : "");
 			    break;
 		    case CURRENT_BETA_STATUS:
 			    result = Utils.getprop(CURRENT_BETA_STATUS, useDefaults ? context.getResources().getString(R.string.defaultBetaStatus) : "0");
 			    break;
             case CURRENT_VERSION_FINGERPRINT:
                 result = Utils.getprop(CURRENT_VERSION_FINGERPRINT, useDefaults ? "" : ""); // TODO: define default value for fingerprint
                 break;
 		    default:
 			    result = "";
 			    break;
 	    }

         return result;
     }

     public static Version getLatestVersion(Context context)
     {

         Version latest = null;
         Resources resources = context.getResources();
         FileInputStream fis = null;
         try {
             fis = context.openFileInput(resources.getString(R.string.configFilename) + resources.getString(R.string.config_xml));
         } catch (FileNotFoundException e){
         }

         if (fis != null)
         {
             try
             {
                 latest = parseLatestXML(context, fis);
             } catch (XmlPullParserException e)
             {
                 Log.e(TAG, "Could not start the XML parser", e);
             } catch (IOException e)
             {
                 Log.e(TAG, "Invalid data in File", e);
                 // remove the files
                 removeConfigFiles(context);
             }
         }

         removeZipContents(context);

         return latest;
     }

     // @formatter:off
     public enum XML_LEVEL_TAGS
     {
         NONE, AOSP, FAIRPHONE, STORES
     }

     public enum XML_TAGS
     {
         /*RELEASES,*/ AOSP, FAIRPHONE, VERSION, NAME, BUILD_NUMBER, ANDROID_VERSION, RELEASE_NOTES, RELEASE_DATE, MD5SUM, THUMBNAIL_LINK, UPDATE_LINK, ERASE_DATA_WARNING, DEPENDENCIES, /*STORES,*/ STORE, SHOW_DISCLAIMER
     }

     // @formatter:on

     private static Version parseLatestXML(Context context, File latestFile) throws XmlPullParserException, IOException {
         FileInputStream fis = new FileInputStream(latestFile);
         return parseLatestXML(context, fis);
     }

     private static Version parseLatestXML(Context context, FileInputStream fis) throws XmlPullParserException, IOException
     {

         Version version = null;
         Store store = null;
         Pair<Version, Store> result;

         UpdaterData update = UpdaterData.getInstance();
         update.resetUpdaterData();

         XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
         factory.setNamespaceAware(true);


         XmlPullParser xpp = factory.newPullParser();

         xpp.setInput(new InputStreamReader(fis));

         int eventType = xpp.getEventType();

         XML_LEVEL_TAGS currentTag = XML_LEVEL_TAGS.NONE;

         while (eventType != XmlPullParser.END_DOCUMENT)
         {
             String tagName;
             switch (eventType)
             {
                 case XmlPullParser.START_DOCUMENT:
                     break;
                 case XmlPullParser.START_TAG:
                     tagName = xpp.getName();
                     currentTag = getCurrentXmlElement(tagName, currentTag);
                     result = readStartTag(xpp, currentTag, tagName, update, version, store);
                     version = result.first;
                     store = result.second;
                     break;
                 case XmlPullParser.END_TAG:
                     tagName = xpp.getName();
                     currentTag = getCurrentXmlElement(tagName, currentTag);
                     result = readEndTag(currentTag, tagName, update, version, store);
                     version = result.first;
                     store = result.second;
                     break;
                 default:
                     break;
             }

             eventType = xpp.next();
         }
         fis.close();

         removeZipContents(context);
         return update.getLatestVersion(getSystemData(context, CURRENT_VERSION_IMAGE_TYPE, true));
     }

     private static Pair<Version, Store> readStartTag(XmlPullParser xpp, XML_LEVEL_TAGS currentTag, String tagName, UpdaterData update, Version version, Store store) throws XmlPullParserException, IOException
     {
         Version updateVersion = null;
         Store updateStore = null;
         switch (currentTag)
         {
             case AOSP:
                 if (tagName.equalsIgnoreCase(XML_TAGS.AOSP.name()))
                 {
                     update.setLatestAOSPVersionNumber(xpp.getAttributeValue(0));
                 }
                 updateVersion = readVersion(version, xpp, tagName);
                 updateVersion.setImageType(Version.IMAGE_TYPE_AOSP);
                 break;
             case FAIRPHONE:
                 if (tagName.equalsIgnoreCase(XML_TAGS.FAIRPHONE.name()))
                 {
                     update.setLatestFairphoneVersionNumber(xpp.getAttributeValue(0));
                 }
                 updateVersion = readVersion(version, xpp, tagName);
                 updateVersion.setImageType(Version.IMAGE_TYPE_FAIRPHONE);
                 break;
             case STORES:
                 updateStore = readStore(store, xpp, tagName);
                 break;
             case NONE:
             default:
                 if(version != null)
                 {
                     updateVersion = new Version(version);
                 }

                 if(store != null)
                 {
                     updateStore = new Store(store);
                 }
                 break;
         }

         return new Pair<>(updateVersion, updateStore);
     }

     private static Pair<Version, Store> readEndTag(XML_LEVEL_TAGS currentTag, String tagName, UpdaterData update, Version version, Store store) {
         Version updateVersion = null;
         Store updateStore = null;
         switch (currentTag)
         {
             case AOSP:
                 if (tagName.equalsIgnoreCase(XML_TAGS.VERSION.name()))
                 {
                     update.addAOSPVersion(version);
                     updateVersion = null;
                 }
                 else
                 {
                     if(version != null)
                     {
                         updateVersion = new Version(version);
                     }
                 }
                 break;
             case FAIRPHONE:
                 if (tagName.equalsIgnoreCase(XML_TAGS.VERSION.name()))
                 {
                     update.addFairphoneVersion(version);
                     updateVersion = null;
                 }
                 else
                 {
                     if(version != null)
                     {
                         updateVersion = new Version(version);
                     }
                 }
                 break;
             case STORES:
                 if (tagName.equalsIgnoreCase(XML_TAGS.STORE.name()))
                 {
                     update.addAppStore(store);
                     updateStore = null;
                 }
                 else
                 {
                     if(store != null)
                     {
                         updateStore = new Store(store);
                     }
                 }
                 break;
             case NONE:
             default:
                 if(version != null)
                 {
                     updateVersion = new Version(version);
                 }

                 if(store != null)
                 {
                     updateStore = new Store(store);
                 }
                 break;
         }

         return new Pair<>(updateVersion, updateStore);
     }

     private static Version readVersion(Version version, XmlPullParser xpp, String tagName) throws XmlPullParserException, IOException
     {
         Version updateVersion;
         if (version == null)
         {
             updateVersion = new Version();
         }
         else
         {
             updateVersion = new Version(version);
         }

         readDownloadableItem(updateVersion, xpp, tagName);

         if (tagName.equalsIgnoreCase(XML_TAGS.VERSION.name()))
         {
             updateVersion.setNumber(xpp.getAttributeValue(0));
         }
         else if (tagName.equalsIgnoreCase(XML_TAGS.ANDROID_VERSION.name()))
         {
             updateVersion.setAndroidVersion(xpp.nextText());
         }
         else if (tagName.equalsIgnoreCase(XML_TAGS.DEPENDENCIES.name()))
         {
             updateVersion.setVersionDependencies(xpp.nextText());
         }
         else if (tagName.equalsIgnoreCase(XML_TAGS.ERASE_DATA_WARNING.name()))
         {
             updateVersion.setEraseAllPartitionWarning();
         }

         return updateVersion;
     }

     private static Store readStore(Store store, XmlPullParser xpp, String tagName) throws XmlPullParserException, IOException
     {

         Store updateStore;
         if (store == null)
         {
             updateStore = new Store();
         }
         else
         {
             updateStore = new Store(store);
         }

         readDownloadableItem(updateStore, xpp, tagName);

         if (tagName.equalsIgnoreCase(XML_TAGS.STORE.name()))
         {
             updateStore.setNumber(xpp.getAttributeValue(0));
         }
         else if (tagName.equalsIgnoreCase(XML_TAGS.SHOW_DISCLAIMER.name()))
         {
             updateStore.setShowDisclaimer();
         }

         return updateStore;
     }

     private static void readDownloadableItem(DownloadableItem item, XmlPullParser xpp, String tagName) throws XmlPullParserException, IOException
     {
         if (tagName.equalsIgnoreCase(XML_TAGS.NAME.name()))
         {
             item.setName(xpp.nextText());
         }
         else if (tagName.equalsIgnoreCase(XML_TAGS.BUILD_NUMBER.name()))
         {
             item.setBuildNumber(xpp.nextText());
         }
         else if (tagName.equalsIgnoreCase(XML_TAGS.RELEASE_NOTES.name()))
         {
             item.setReleaseNotes(Version.DEFAULT_NOTES_LANG, xpp.nextText());
         }
         else if (tagName.equalsIgnoreCase(XML_TAGS.RELEASE_NOTES.name() + "_" + Locale.getDefault().getLanguage()))
         {
             item.setReleaseNotes(Locale.getDefault().getLanguage(), xpp.nextText());
         }
         else if (tagName.equalsIgnoreCase(XML_TAGS.RELEASE_DATE.name()))
         {
             item.setReleaseDate(xpp.nextText());
         }
         else if (tagName.equalsIgnoreCase(XML_TAGS.MD5SUM.name()))
         {
             item.setMd5Sum(xpp.nextText());
         }
         else if (tagName.equalsIgnoreCase(XML_TAGS.THUMBNAIL_LINK.name()))
         {
             item.setThumbnailLink(xpp.nextText());
         }
         else if (tagName.equalsIgnoreCase(XML_TAGS.UPDATE_LINK.name()))
         {
             item.setDownloadLink(xpp.nextText());
         }
     }

     private static XML_LEVEL_TAGS getCurrentXmlElement(String tagName, XML_LEVEL_TAGS current)
     {
         XML_LEVEL_TAGS retval = current;

         if (tagName.equalsIgnoreCase(XML_LEVEL_TAGS.AOSP.name()))
         {
             retval = XML_LEVEL_TAGS.AOSP;
         }
         else if (tagName.equalsIgnoreCase(XML_LEVEL_TAGS.FAIRPHONE.name()))
         {
             retval = XML_LEVEL_TAGS.FAIRPHONE;
         }
         else if (tagName.equalsIgnoreCase(XML_LEVEL_TAGS.STORES.name()))
         {
             retval = XML_LEVEL_TAGS.STORES;
         }
         return retval;
     }


     public static void removeConfigFiles(Context context)
     {
         Resources resources = context.getResources();
         String filePath =
                 Environment.getExternalStorageDirectory() + resources.getString(R.string.updaterFolder) + resources.getString(R.string.configFilename);

         removeFile(filePath + resources.getString(R.string.config_zip));
         removeZipContents(context);
     }

     private static void removeZipContents(Context context)
     {
         Resources resources = context.getResources();
         String filePath =
                 Environment.getExternalStorageDirectory() + resources.getString(R.string.updaterFolder) + resources.getString(R.string.configFilename);

         removeFile(filePath + resources.getString(R.string.config_xml));
         removeFile(filePath + resources.getString(R.string.config_sig));
     }

     private static void removeFile(String filePath)
     {
         File file = new File(filePath);
         if (file.exists())
         {
 	        final boolean notDeleted = !file.delete();
 	        if (notDeleted) {
 		        Log.d(TAG, "Couldn't delete file: " + file.getAbsolutePath());
 	        }
         }
     }

 }
	/*
	* Copyright (C) 2013 Fairphone Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.fairphone.updater.data;

	import android.content.Context;
	import android.content.res.Resources;
	import android.os.Build;
	import android.os.Environment;
	import android.util.Log;
	import android.util.Pair;

	import com.fairphone.updater.R;
	import com.fairphone.updater.tools.Utils;

	import org.xmlpull.v1.XmlPullParser;
	import org.xmlpull.v1.XmlPullParserException;
	import org.xmlpull.v1.XmlPullParserFactory;

	import java.io.File;
	import java.io.FileInputStream;
	import java.io.FileNotFoundException;
	import java.io.IOException;
	import java.io.InputStreamReader;
	import java.util.Locale;

	public class VersionParserHelper
	{

	private static final String TAG = VersionParserHelper.class.getSimpleName();

	private static final String CURRENT_VERSION_NUMBER = "fairphone.ota.version.number";
	private static final String CURRENT_VERSION_NAME = "fairphone.ota.version.name";
	private static final String CURRENT_VERSION_BUILD_NUMBER = "fairphone.ota.build_number";
	private static final String CURRENT_BETA_STATUS = "fairphone.ota.beta";
	private static final String CURRENT_ANDROID_VERSION = "fairphone.ota.android_version";
	private static final String CURRENT_VERSION_IMAGE_TYPE = "fairphone.ota.image_type";
	private static final String CURRENT_VERSION_BUILD_DATE = "ro.build.date.utc";
	private static final String CURRENT_VERSION_FINGERPRINT = "ro.build.fingerprint";


	private static Version version;
	public static Version getDeviceVersion(Context context)
	{
	if (version == null){
	Version versionBuilder = new Version();
	String[] suportedDevices = context.getResources().getString(R.string.knownFPDevices).split(";");
	String modelWithoutSpaces = Build.MODEL.replaceAll("\\s", "");
	boolean knownFPDevice = false;
	for(String device : suportedDevices){
	knownFPDevice = knownFPDevice \|\| device.equals(modelWithoutSpaces);
	}

	try
	{
	versionBuilder.setNumber(getSystemData(context, CURRENT_VERSION_FINGERPRINT, knownFPDevice));
	} catch (NumberFormatException e)
	{
	String defaultVersionNumber = context.getResources().getString(R.string.defaultVersionNumber);
	Log.w(TAG, "Error parsing current version number. Defaulting to " + defaultVersionNumber + ": " + e.getLocalizedMessage());
	versionBuilder.setNumber(defaultVersionNumber);
	}
	versionBuilder.setName(getSystemData(context, CURRENT_VERSION_NAME, knownFPDevice));
	versionBuilder.setBuildNumber(getSystemData(context, CURRENT_VERSION_BUILD_NUMBER, knownFPDevice));
	versionBuilder.setAndroidVersion(getSystemData(context, CURRENT_ANDROID_VERSION, knownFPDevice));
	versionBuilder.setImageType(getSystemData(context, CURRENT_VERSION_IMAGE_TYPE, knownFPDevice));
	versionBuilder.setReleaseDate(getSystemData(context, CURRENT_VERSION_BUILD_DATE, knownFPDevice));
	versionBuilder.setBetaStatus(getSystemData(context, CURRENT_BETA_STATUS, knownFPDevice));

	Version versionData = UpdaterData.getInstance().getVersion(versionBuilder.getImageType(), versionBuilder.getNumber());
	versionBuilder.setThumbnailLink(versionData != null ? versionData.getThumbnailLink() : "");
	versionBuilder.setReleaseNotes(Locale.getDefault().getLanguage(), versionData != null ? versionData.getReleaseNotes(Locale.getDefault().getLanguage()) : "");
	version = versionBuilder;
	}

	return version;
	}

	private static String getSystemData(Context context, String property, boolean useDefaults)
	{
	String result;
	switch (property) {
	case CURRENT_VERSION_NUMBER:
	result = Utils.getprop(CURRENT_VERSION_NUMBER, useDefaults ? String.valueOf(context.getResources().getString(R.string.defaultVersionNumber)) : "");
	break;
	case CURRENT_VERSION_NAME:
	result = Utils.getprop(CURRENT_VERSION_NAME, useDefaults ? context.getResources().getString(R.string.defaultVersionName) : "");
	break;
	case CURRENT_ANDROID_VERSION:
	result = Utils.getprop(CURRENT_ANDROID_VERSION, useDefaults ? context.getResources().getString(R.string.defaultAndroidVersionNumber) : "");
	break;
	case CURRENT_VERSION_BUILD_NUMBER:
	result = Utils.getprop(CURRENT_VERSION_BUILD_NUMBER, useDefaults ? context.getResources().getString(R.string.defaultBuildNumber) : "");
	break;
	case CURRENT_VERSION_IMAGE_TYPE:
	result = Utils.getprop(CURRENT_VERSION_IMAGE_TYPE, useDefaults ? context.getResources().getString(R.string.defaultImageType) : "");
	break;
	case CURRENT_VERSION_BUILD_DATE:
	result = Utils.getprop(CURRENT_VERSION_BUILD_DATE, useDefaults ? context.getResources().getString(R.string.defaultBuildDate) : "");
	break;
	case CURRENT_BETA_STATUS:
	result = Utils.getprop(CURRENT_BETA_STATUS, useDefaults ? context.getResources().getString(R.string.defaultBetaStatus) : "0");
	break;
	case CURRENT_VERSION_FINGERPRINT:
	result = Utils.getprop(CURRENT_VERSION_FINGERPRINT, useDefaults ? "" : ""); // TODO: define default value for fingerprint
	break;
	default:
	result = "";
	break;
	}

	return result;
	}

	public static Version getLatestVersion(Context context)
	{

	Version latest = null;
	Resources resources = context.getResources();
	FileInputStream fis = null;
	try {
	fis = context.openFileInput(resources.getString(R.string.configFilename) + resources.getString(R.string.config_xml));
	} catch (FileNotFoundException e){
	}

	if (fis != null)
	{
	try
	{
	latest = parseLatestXML(context, fis);
	} catch (XmlPullParserException e)
	{
	Log.e(TAG, "Could not start the XML parser", e);
	} catch (IOException e)
	{
	Log.e(TAG, "Invalid data in File", e);
	// remove the files
	removeConfigFiles(context);
	}
	}

	removeZipContents(context);

	return latest;
	}

	// @formatter:off
	public enum XML_LEVEL_TAGS
	{
	NONE, AOSP, FAIRPHONE, STORES
	}

	public enum XML_TAGS
	{
	/RELEASES,/ AOSP, FAIRPHONE, VERSION, NAME, BUILD_NUMBER, ANDROID_VERSION, RELEASE_NOTES, RELEASE_DATE, MD5SUM, THUMBNAIL_LINK, UPDATE_LINK, ERASE_DATA_WARNING, DEPENDENCIES, /STORES,/ STORE, SHOW_DISCLAIMER
	}

	// @formatter:on

	private static Version parseLatestXML(Context context, File latestFile) throws XmlPullParserException, IOException {
	FileInputStream fis = new FileInputStream(latestFile);
	return parseLatestXML(context, fis);
	}

	private static Version parseLatestXML(Context context, FileInputStream fis) throws XmlPullParserException, IOException
	{

	Version version = null;
	Store store = null;
	Pair<Version, Store> result;

	UpdaterData update = UpdaterData.getInstance();
	update.resetUpdaterData();

	XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
	factory.setNamespaceAware(true);


	XmlPullParser xpp = factory.newPullParser();

	xpp.setInput(new InputStreamReader(fis));

	int eventType = xpp.getEventType();

	XML_LEVEL_TAGS currentTag = XML_LEVEL_TAGS.NONE;

	while (eventType != XmlPullParser.END_DOCUMENT)
	{
	String tagName;
	switch (eventType)
	{
	case XmlPullParser.START_DOCUMENT:
	break;
	case XmlPullParser.START_TAG:
	tagName = xpp.getName();
	currentTag = getCurrentXmlElement(tagName, currentTag);
	result = readStartTag(xpp, currentTag, tagName, update, version, store);
	version = result.first;
	store = result.second;
	break;
	case XmlPullParser.END_TAG:
	tagName = xpp.getName();
	currentTag = getCurrentXmlElement(tagName, currentTag);
	result = readEndTag(currentTag, tagName, update, version, store);
	version = result.first;
	store = result.second;
	break;
	default:
	break;
	}

	eventType = xpp.next();
	}
	fis.close();

	removeZipContents(context);
	return update.getLatestVersion(getSystemData(context, CURRENT_VERSION_IMAGE_TYPE, true));
	}

	private static Pair<Version, Store> readStartTag(XmlPullParser xpp, XML_LEVEL_TAGS currentTag, String tagName, UpdaterData update, Version version, Store store) throws XmlPullParserException, IOException
	{
	Version updateVersion = null;
	Store updateStore = null;
	switch (currentTag)
	{
	case AOSP:
	if (tagName.equalsIgnoreCase(XML_TAGS.AOSP.name()))
	{
	update.setLatestAOSPVersionNumber(xpp.getAttributeValue(0));
	}
	updateVersion = readVersion(version, xpp, tagName);
	updateVersion.setImageType(Version.IMAGE_TYPE_AOSP);
	break;
	case FAIRPHONE:
	if (tagName.equalsIgnoreCase(XML_TAGS.FAIRPHONE.name()))
	{
	update.setLatestFairphoneVersionNumber(xpp.getAttributeValue(0));
	}
	updateVersion = readVersion(version, xpp, tagName);
	updateVersion.setImageType(Version.IMAGE_TYPE_FAIRPHONE);
	break;
	case STORES:
	updateStore = readStore(store, xpp, tagName);
	break;
	case NONE:
	default:
	if(version != null)
	{
	updateVersion = new Version(version);
	}

	if(store != null)
	{
	updateStore = new Store(store);
	}
	break;
	}

	return new Pair<>(updateVersion, updateStore);
	}

	private static Pair<Version, Store> readEndTag(XML_LEVEL_TAGS currentTag, String tagName, UpdaterData update, Version version, Store store) {
	Version updateVersion = null;
	Store updateStore = null;
	switch (currentTag)
	{
	case AOSP:
	if (tagName.equalsIgnoreCase(XML_TAGS.VERSION.name()))
	{
	update.addAOSPVersion(version);
	updateVersion = null;
	}
	else
	{
	if(version != null)
	{
	updateVersion = new Version(version);
	}
	}
	break;
	case FAIRPHONE:
	if (tagName.equalsIgnoreCase(XML_TAGS.VERSION.name()))
	{
	update.addFairphoneVersion(version);
	updateVersion = null;
	}
	else
	{
	if(version != null)
	{
	updateVersion = new Version(version);
	}
	}
	break;
	case STORES:
	if (tagName.equalsIgnoreCase(XML_TAGS.STORE.name()))
	{
	update.addAppStore(store);
	updateStore = null;
	}
	else
	{
	if(store != null)
	{
	updateStore = new Store(store);
	}
	}
	break;
	case NONE:
	default:
	if(version != null)
	{
	updateVersion = new Version(version);
	}

	if(store != null)
	{
	updateStore = new Store(store);
	}
	break;
	}

	return new Pair<>(updateVersion, updateStore);
	}

	private static Version readVersion(Version version, XmlPullParser xpp, String tagName) throws XmlPullParserException, IOException
	{
	Version updateVersion;
	if (version == null)
	{
	updateVersion = new Version();
	}
	else
	{
	updateVersion = new Version(version);
	}

	readDownloadableItem(updateVersion, xpp, tagName);

	if (tagName.equalsIgnoreCase(XML_TAGS.VERSION.name()))
	{
	updateVersion.setNumber(xpp.getAttributeValue(0));
	}
	else if (tagName.equalsIgnoreCase(XML_TAGS.ANDROID_VERSION.name()))
	{
	updateVersion.setAndroidVersion(xpp.nextText());
	}
	else if (tagName.equalsIgnoreCase(XML_TAGS.DEPENDENCIES.name()))
	{
	updateVersion.setVersionDependencies(xpp.nextText());
	}
	else if (tagName.equalsIgnoreCase(XML_TAGS.ERASE_DATA_WARNING.name()))
	{
	updateVersion.setEraseAllPartitionWarning();
	}

	return updateVersion;
	}

	private static Store readStore(Store store, XmlPullParser xpp, String tagName) throws XmlPullParserException, IOException
	{

	Store updateStore;
	if (store == null)
	{
	updateStore = new Store();
	}
	else
	{
	updateStore = new Store(store);
	}

	readDownloadableItem(updateStore, xpp, tagName);

	if (tagName.equalsIgnoreCase(XML_TAGS.STORE.name()))
	{
	updateStore.setNumber(xpp.getAttributeValue(0));
	}
	else if (tagName.equalsIgnoreCase(XML_TAGS.SHOW_DISCLAIMER.name()))
	{
	updateStore.setShowDisclaimer();
	}

	return updateStore;
	}

	private static void readDownloadableItem(DownloadableItem item, XmlPullParser xpp, String tagName) throws XmlPullParserException, IOException
	{
	if (tagName.equalsIgnoreCase(XML_TAGS.NAME.name()))
	{
	item.setName(xpp.nextText());
	}
	else if (tagName.equalsIgnoreCase(XML_TAGS.BUILD_NUMBER.name()))
	{
	item.setBuildNumber(xpp.nextText());
	}
	else if (tagName.equalsIgnoreCase(XML_TAGS.RELEASE_NOTES.name()))
	{
	item.setReleaseNotes(Version.DEFAULT_NOTES_LANG, xpp.nextText());
	}
	else if (tagName.equalsIgnoreCase(XML_TAGS.RELEASE_NOTES.name() + "_" + Locale.getDefault().getLanguage()))
	{
	item.setReleaseNotes(Locale.getDefault().getLanguage(), xpp.nextText());
	}
	else if (tagName.equalsIgnoreCase(XML_TAGS.RELEASE_DATE.name()))
	{
	item.setReleaseDate(xpp.nextText());
	}
	else if (tagName.equalsIgnoreCase(XML_TAGS.MD5SUM.name()))
	{
	item.setMd5Sum(xpp.nextText());
	}
	else if (tagName.equalsIgnoreCase(XML_TAGS.THUMBNAIL_LINK.name()))
	{
	item.setThumbnailLink(xpp.nextText());
	}
	else if (tagName.equalsIgnoreCase(XML_TAGS.UPDATE_LINK.name()))
	{
	item.setDownloadLink(xpp.nextText());
	}
	}

	private static XML_LEVEL_TAGS getCurrentXmlElement(String tagName, XML_LEVEL_TAGS current)
	{
	XML_LEVEL_TAGS retval = current;

	if (tagName.equalsIgnoreCase(XML_LEVEL_TAGS.AOSP.name()))
	{
	retval = XML_LEVEL_TAGS.AOSP;
	}
	else if (tagName.equalsIgnoreCase(XML_LEVEL_TAGS.FAIRPHONE.name()))
	{
	retval = XML_LEVEL_TAGS.FAIRPHONE;
	}
	else if (tagName.equalsIgnoreCase(XML_LEVEL_TAGS.STORES.name()))
	{
	retval = XML_LEVEL_TAGS.STORES;
	}
	return retval;
	}



	public static void removeConfigFiles(Context context)
	{
	Resources resources = context.getResources();
	String filePath =
	Environment.getExternalStorageDirectory() + resources.getString(R.string.updaterFolder) + resources.getString(R.string.configFilename);

	removeFile(filePath + resources.getString(R.string.config_zip));
	removeZipContents(context);
	}

	private static void removeZipContents(Context context)
	{
	Resources resources = context.getResources();
	String filePath =
	Environment.getExternalStorageDirectory() + resources.getString(R.string.updaterFolder) + resources.getString(R.string.configFilename);

	removeFile(filePath + resources.getString(R.string.config_xml));
	removeFile(filePath + resources.getString(R.string.config_sig));
	}

	private static void removeFile(String filePath)
	{
	File file = new File(filePath);
	if (file.exists())
	{
	final boolean notDeleted = !file.delete();
	if (notDeleted) {
	Log.d(TAG, "Couldn't delete file: " + file.getAbsolutePath());
	}
	}
	}

	}