ZabbixServerPreferenceActivity.java

/*
This file is part of ZAX.

	ZAX 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 3 of the License, or
	(at your option) any later version.

	ZAX 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 ZAX.  If not, see <http://www.gnu.org/licenses/>.
*/

package com.inovex.zabbixmobile.activities;

import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.support.v7.widget.Toolbar;
import android.util.Patterns;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.Toast;

import com.inovex.zabbixmobile.R;
import com.inovex.zabbixmobile.model.ZaxPreferences;
import com.inovex.zabbixmobile.model.ZaxServerPreferences;

/**
 * The preference activity.
 *
 */
public class ZabbixServerPreferenceActivity extends PreferenceActivity implements
		OnSharedPreferenceChangeListener, Preference.OnPreferenceChangeListener {

	private static final int REQUEST_CODE_PREFERENCES_THEMED = 958723;
	private static final String ARG_ACTIVITY_RESULT = "ACTIVITY_RESULT";
	public static final int PREFERENCES_CHANGED_SERVER = 1;
	public static final int PREFERENCES_CHANGED_PUSH = 2;
	public static final int PREFERENCES_CHANGED_WIDGET = 4;
	public static final int PREFERENCES_CHANGED_THEME = 8;
	private static final String TAG = "ZabbixServerPreferenceActivity";
	public static final String ARG_ZABBIX_SERVER_ID = "ZABBIX_SERVER_ID";

	private static final String ZABBIX_URL_KEY  = "zabbix_url";
	private static final String ZABBIX_USER_KEY = "zabbix_username";
	private static final String ZABBIX_PASSWORD_KEY = "zabbix_password";
	private static final String ZABBIX_HTTP_AUTH_ENABLED_KEY = "http_auth_enabled";
	private static final String ZABBIX_HTTP_AUTH_USER_KEY = "http_auth_username";
	private static final String ZABBIX_HTTP_AUTH_PASSWORD_KEY = "http_auth_password";

	private ZaxServerPreferences mPrefs;
	private int activityResult = 0;
	private boolean recursion;

	// We use the deprecated method because it is compatible to old Android
	// versions.
	@SuppressWarnings("deprecation")
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		ZaxPreferences prefs = ZaxPreferences.getInstance(getApplicationContext());
		if (prefs.isDarkTheme())
			setTheme(R.style.AppThemeDark);
		else
			setTheme(R.style.AppTheme);
		super.onCreate(savedInstanceState);

		// the activity might have been started with a result code which we need
		// to adopt
		activityResult = getIntent().getIntExtra(ARG_ACTIVITY_RESULT,
				activityResult);

		long zabbixServer = getIntent().getLongExtra(ARG_ZABBIX_SERVER_ID, -1);
		mPrefs = new ZaxServerPreferences(getApplicationContext(), zabbixServer, false);

		addPreferencesFromResource(R.xml.server_preferences);

		//Set onPreferenceChangeListener to serverUrl preference
		Preference serverUrl = getPreferenceScreen().findPreference(ZABBIX_URL_KEY);
		serverUrl.setOnPreferenceChangeListener(this);
	}

	@Override
	protected void onPostCreate(Bundle savedInstanceState) {
		super.onPostCreate(savedInstanceState);

		LinearLayout root = (LinearLayout)findViewById(android.R.id.list).getParent().getParent().getParent();
		Toolbar bar = (Toolbar) LayoutInflater.from(this).inflate(R.layout.toolbar_main, root, false);
		bar.setNavigationIcon(R.drawable.abc_ic_ab_back_mtrl_am_alpha);
		bar.setTitle(getString(R.string.preferences));
		root.addView(bar, 0); // insert at top
		bar.setNavigationOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				onBackPressed();
			}
		});
	}

	@Override
	protected void onStop() {
		super.onStop();
	}

	@Override
	public void onBackPressed() {
		setResult(activityResult, new Intent());
		finish();
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case android.R.id.home:
			setResult(activityResult, new Intent());
			finish();
			return true;
		}
		return super.onOptionsItemSelected(item);
	}

	@Override
	protected void onDestroy() {
		if (recursion) {
			return;
		}
		recursion = true;
		mPrefs.savePrefs();
		recursion = false;

		super.onDestroy();
	}

	@Override
	protected void onResume() {
		super.onResume();
		mPrefs.registerOnSharedPreferenceChangeListener(this);
	}

	@Override
	protected void onPause() {
		super.onPause();
		mPrefs.unregisterOnSharedPreferenceChangeListener(this);
	}

	@Override
	public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
			String key) {
		if (recursion) {
			return;
		}

		recursion = true;
		mPrefs.savePrefs();
		recursion = false;

		if (key.equals(ZABBIX_URL_KEY) || key.equals(ZABBIX_USER_KEY)
				|| key.equals(ZABBIX_PASSWORD_KEY)
				|| key.equals(ZABBIX_HTTP_AUTH_ENABLED_KEY)
				|| key.equals(ZABBIX_HTTP_AUTH_USER_KEY)
				|| key.equals(ZABBIX_HTTP_AUTH_PASSWORD_KEY)) {
			activityResult |= PREFERENCES_CHANGED_SERVER;
		}
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);

		// BaseActivity expects a result code, so we pass it through from the
		// started themed preference activity
		if (requestCode == REQUEST_CODE_PREFERENCES_THEMED) {
			setResult(resultCode, new Intent());
			finish();
		}
	}

	/**
	 * Validate settings
	 * @param preference
	 * @param newValue
	 * @return if validation is ok: return true, so the data will be saved
	 * if false is returned, the data won't be saved
	 */
	@Override
	public boolean onPreferenceChange(Preference preference, Object newValue) {
		//Only handle zabbix_url preference
		if(!preference.getKey().equals(ZABBIX_URL_KEY)) {
			return true;
		}
		if(!Patterns.WEB_URL.matcher((String) newValue).matches()) {
			Toast.makeText(getApplicationContext(), R.string.serverpreferences_url_validation_invalid_url, Toast.LENGTH_LONG).show();
			return false;
		}
		return true;
	}
}