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/*
* Copyright 2016 - 2020 Anton Tananaev (anton@traccar.org)
*
* 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 org.traccar.manager;
import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.app.Fragment;
import android.content.DialogInterface;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class StartFragment extends Fragment implements View.OnClickListener {
private static final String TAG = StartFragment.class.getSimpleName();
private static int MAX_REDIRECTS = 5;
private EditText serverField;
private Button startButton;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_start, container, false);
serverField = (EditText) view.findViewById(R.id.field_server);
startButton = (Button) view.findViewById(R.id.button_start);
startButton.setOnClickListener(this);
return view;
}
@SuppressLint("StaticFieldLeak")
@Override
public void onClick(View view) {
startButton.setEnabled(false);
new AsyncTask<String, Void, Boolean>() {
@Override
protected Boolean doInBackground(String... urls) {
try {
Uri uri = Uri.parse(urls[0]).buildUpon().appendEncodedPath("api/server").build();
String url = uri.toString();
HttpURLConnection urlConnection = null;
for (int i = 0; i < MAX_REDIRECTS; i++) {
URL resourceUrl = new URL(url);
urlConnection = (HttpURLConnection) resourceUrl.openConnection();
urlConnection.setInstanceFollowRedirects(false);
switch (urlConnection.getResponseCode()) {
case HttpURLConnection.HTTP_MOVED_PERM:
case HttpURLConnection.HTTP_MOVED_TEMP:
url = urlConnection.getHeaderField("Location");
continue;
}
break;
}
BufferedReader reader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
String line;
StringBuilder responseBuilder = new StringBuilder();
while ((line = reader.readLine()) != null) {
responseBuilder.append(line);
}
new JSONObject(responseBuilder.toString());
return true;
} catch (IOException | JSONException e) {
Log.w(TAG, e);
}
return false;
}
@Override
protected void onPostExecute(Boolean result) {
if (getActivity() != null) {
if (result) {
onSuccess();
} else {
onError();
}
}
}
}.execute(serverField.getText().toString());
}
private void onSuccess() {
PreferenceManager.getDefaultSharedPreferences(getActivity())
.edit().putString(MainActivity.PREFERENCE_URL, serverField.getText().toString()).apply();
getActivity().getFragmentManager()
.beginTransaction().replace(android.R.id.content, new MainFragment()).commitAllowingStateLoss();
}
private void onError() {
startButton.setEnabled(true);
AlertDialog alertDialog = new AlertDialog.Builder(getActivity()).create();
alertDialog.setMessage(getString(R.string.error_connection));
alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL, getString(android.R.string.ok),
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alertDialog.show();
}
}
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