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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License
     15  */
     16 
     17 package com.android.voicemail.impl.configui;
     18 
     19 import android.content.Context;
     20 import android.content.SharedPreferences;
     21 import android.os.Bundle;
     22 import android.os.PersistableBundle;
     23 import android.preference.EditTextPreference;
     24 import android.preference.Preference;
     25 import android.preference.Preference.OnPreferenceChangeListener;
     26 import android.preference.PreferenceFragment;
     27 import android.preference.PreferenceManager;
     28 import android.preference.PreferenceScreen;
     29 import android.preference.SwitchPreference;
     30 import android.support.annotation.Nullable;
     31 import android.support.annotation.VisibleForTesting;
     32 import android.telecom.PhoneAccount;
     33 import android.telecom.PhoneAccountHandle;
     34 import android.telecom.TelecomManager;
     35 import android.text.TextUtils;
     36 import com.android.dialer.common.Assert;
     37 import com.android.dialer.common.concurrent.ThreadUtil;
     38 import com.android.voicemail.VoicemailComponent;
     39 
     40 /**
     41  * Fragment to edit the override values for the {@link import
     42  * com.android.voicemail.impl.OmtpVvmCarrierConfigHelper}
     43  */
     44 public class ConfigOverrideFragment extends PreferenceFragment
     45     implements OnPreferenceChangeListener {
     46 
     47   /**
     48    * Any preference with key that starts with this prefix will be written to the dialer carrier
     49    * config.
     50    */
     51   @VisibleForTesting static final String CONFIG_OVERRIDE_KEY_PREFIX = "vvm_config_override_key_";
     52 
     53   @Override
     54   public void onCreate(@Nullable Bundle savedInstanceState) {
     55     super.onCreate(savedInstanceState);
     56     PreferenceManager.setDefaultValues(getActivity(), R.xml.vvm_config_override, false);
     57     addPreferencesFromResource(R.xml.vvm_config_override);
     58 
     59     // add listener so the value of a EditTextPreference will be updated to the summary.
     60     for (int i = 0; i < getPreferenceScreen().getPreferenceCount(); i++) {
     61       Preference preference = getPreferenceScreen().getPreference(i);
     62       preference.setOnPreferenceChangeListener(this);
     63       updatePreference(preference);
     64     }
     65   }
     66 
     67   @Override
     68   public boolean onPreferenceChange(Preference preference, Object newValue) {
     69     Assert.isMainThread();
     70     ThreadUtil.postOnUiThread(() -> updatePreference(preference));
     71     return true;
     72   }
     73 
     74   private void updatePreference(Preference preference) {
     75     if (preference instanceof EditTextPreference) {
     76       EditTextPreference editTextPreference = (EditTextPreference) preference;
     77       editTextPreference.setSummary(editTextPreference.getText());
     78     }
     79   }
     80 
     81   @Override
     82   public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
     83     if (TextUtils.equals(
     84         preference.getKey(), getString(R.string.vvm_config_override_load_current_key))) {
     85       loadCurrentConfig();
     86     }
     87     return super.onPreferenceTreeClick(preferenceScreen, preference);
     88   }
     89 
     90   /**
     91    * Loads the config for the currently carrier into the override values, from the dialer or the
     92    * carrier config app. This is a "reset" button to load the defaults.
     93    */
     94   private void loadCurrentConfig() {
     95     Context context = getActivity();
     96     PhoneAccountHandle phoneAccountHandle =
     97         context
     98             .getSystemService(TelecomManager.class)
     99             .getDefaultOutgoingPhoneAccount(PhoneAccount.SCHEME_VOICEMAIL);
    100 
    101     PersistableBundle config =
    102         VoicemailComponent.get(context).getVoicemailClient().getConfig(context, phoneAccountHandle);
    103 
    104     for (int i = 0; i < getPreferenceScreen().getPreferenceCount(); i++) {
    105       Preference preference = getPreferenceScreen().getPreference(i);
    106       String key = preference.getKey();
    107       if (!key.startsWith(CONFIG_OVERRIDE_KEY_PREFIX)) {
    108         continue;
    109       }
    110 
    111       String configKey = key.substring(CONFIG_OVERRIDE_KEY_PREFIX.length());
    112 
    113       if (configKey.endsWith("bool")) {
    114         ((SwitchPreference) preference).setChecked(config.getBoolean(configKey));
    115       } else if (configKey.endsWith("int")) {
    116         ((EditTextPreference) preference).setText(String.valueOf(config.getInt(configKey)));
    117       } else if (configKey.endsWith("string")) {
    118         ((EditTextPreference) preference).setText(config.getString(configKey));
    119       } else if (configKey.endsWith("string_array")) {
    120         ((EditTextPreference) preference).setText(toCsv(config.getStringArray(configKey)));
    121       } else {
    122         throw Assert.createAssertionFailException("unknown type for key " + configKey);
    123       }
    124       updatePreference(preference);
    125     }
    126   }
    127 
    128   public static boolean isOverridden(Context context) {
    129     return PreferenceManager.getDefaultSharedPreferences(context)
    130         .getBoolean(context.getString(R.string.vvm_config_override_enabled_key), false);
    131   }
    132 
    133   public static PersistableBundle getConfig(Context context) {
    134     Assert.checkState(isOverridden(context));
    135     PersistableBundle result = new PersistableBundle();
    136 
    137     SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
    138     for (String key : preferences.getAll().keySet()) {
    139       if (!key.startsWith(CONFIG_OVERRIDE_KEY_PREFIX)) {
    140         continue;
    141       }
    142       String configKey = key.substring(CONFIG_OVERRIDE_KEY_PREFIX.length());
    143       if (configKey.endsWith("bool")) {
    144         result.putBoolean(configKey, preferences.getBoolean(key, false));
    145       } else if (configKey.endsWith("int")) {
    146         result.putInt(configKey, Integer.valueOf(preferences.getString(key, null)));
    147       } else if (configKey.endsWith("string")) {
    148         result.putString(configKey, preferences.getString(key, null));
    149       } else if (configKey.endsWith("string_array")) {
    150         result.putStringArray(configKey, fromCsv(preferences.getString(key, null)));
    151       } else {
    152         throw Assert.createAssertionFailException("unknown type for key " + configKey);
    153       }
    154     }
    155     return result;
    156   }
    157 
    158   private static String toCsv(String[] array) {
    159     if (array == null) {
    160       return "";
    161     }
    162     StringBuilder result = new StringBuilder();
    163     for (String element : array) {
    164       if (result.length() != 0) {
    165         result.append(",");
    166       }
    167       result.append(element);
    168     }
    169     return result.toString();
    170   };
    171 
    172   private static String[] fromCsv(String csv) {
    173     return csv.split(",");
    174   }
    175 }
    176