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/*
* Copyright 2014 Google Inc. All rights reserved.
*
* 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.google.samples.apps.iosched.iowear.utils;
import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.util.Log;
/**
* A utility class. All methods are stateless and static.
*/
public class Utils {
private static final String TAG = "Utils";
private static final String PREF_SESSION_ID = "pref-session-id";
private static final String[] PREF_RESPONSES = {"pref-response-0", "pref-response-1",
"pref-response-2", "pref-response-3"};
/**
* Returns the persisted responses for the feedback with the provided session id. The return is
* an int array of size <code>4</code>. A value <code>-1</code> indicates that there is no
* response for that question.
*/
public static int[] getPersistedResponses(Context context, String sessionId) {
String oldSession = getSessionIdFromPreference(context);
if (null == oldSession || !sessionId.equals(oldSession)) {
// saved data is for a different session
LOGD(TAG, "Clearing persisted data, oldSession = " + oldSession + ", new session: "
+ sessionId);
clearResponses(context);
return new int[]{-1, -1, -1, -1};
}
int[] responses = new int[4];
SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(context);
for (int i = 0; i < PREF_RESPONSES.length; i++) {
responses[i] = pref.getInt(PREF_RESPONSES[i], -1);
}
return responses;
}
/**
* Persists the response to a question for future retrieval. Passing a <code>-1</code> for a
* response amounts to clearing the response for that question.
*/
public static void saveResponse(Context context, int question, int response) {
SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(context);
if (response == -1) {
// we want to remove
pref.edit().remove(PREF_RESPONSES[question]).apply();
} else {
pref.edit().putInt(PREF_RESPONSES[question], response).apply();
}
}
/**
* Clears all the persisted responses.
*/
public static void clearResponses(Context context) {
SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(context);
pref.edit().remove(PREF_SESSION_ID).apply();
for (String name : PREF_RESPONSES) {
pref.edit().remove(name).apply();
}
}
/**
* Saves the sessionId.
*/
public static void saveSessionId(Context context, String sessionId) {
SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(context);
if (null == sessionId) {
// we want to remove
pref.edit().remove(PREF_SESSION_ID).apply();
} else {
pref.edit().putString(PREF_SESSION_ID, sessionId).apply();
}
}
/**
* Returns the persisted session id.
*/
private static String getSessionIdFromPreference(Context context) {
SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(context);
return pref.getString(PREF_SESSION_ID, null);
}
/**
* A simple wrapper around LOGD
*/
public static final void LOGD(String TAG, String message) {
if (Log.isLoggable(TAG, Log.DEBUG)) {
LOGD(TAG, message);
}
}
public static String makeLogTag(String str) {
if (str.length() > 23) {
return str.substring(0, 23);
}
return str;
}
}
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