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
17package com.android.voicemail.impl.configui;
18
19import android.content.Context;
20import android.content.SharedPreferences;
21import android.os.Bundle;
22import android.os.PersistableBundle;
23import android.preference.EditTextPreference;
24import android.preference.Preference;
25import android.preference.Preference.OnPreferenceChangeListener;
26import android.preference.PreferenceFragment;
27import android.preference.PreferenceManager;
28import android.preference.PreferenceScreen;
29import android.preference.SwitchPreference;
30import android.support.annotation.Nullable;
31import android.support.annotation.VisibleForTesting;
32import android.telecom.PhoneAccount;
33import android.telecom.PhoneAccountHandle;
34import android.telecom.TelecomManager;
35import android.text.TextUtils;
36import com.android.dialer.common.Assert;
37import com.android.dialer.common.concurrent.ThreadUtil;
38import com.android.dialer.strictmode.StrictModeUtils;
39import com.android.voicemail.VoicemailComponent;
40
41/**
42 * Fragment to edit the override values for the {@link import
43 * com.android.voicemail.impl.OmtpVvmCarrierConfigHelper}
44 */
45public class ConfigOverrideFragment extends PreferenceFragment
46    implements OnPreferenceChangeListener {
47
48  /**
49   * Any preference with key that starts with this prefix will be written to the dialer carrier
50   * config.
51   */
52  @VisibleForTesting
53  public static final String CONFIG_OVERRIDE_KEY_PREFIX = "vvm_config_override_key_";
54
55  @Override
56  public void onCreate(@Nullable Bundle savedInstanceState) {
57    super.onCreate(savedInstanceState);
58    PreferenceManager.setDefaultValues(getActivity(), R.xml.vvm_config_override, false);
59    addPreferencesFromResource(R.xml.vvm_config_override);
60
61    // add listener so the value of a EditTextPreference will be updated to the summary.
62    for (int i = 0; i < getPreferenceScreen().getPreferenceCount(); i++) {
63      Preference preference = getPreferenceScreen().getPreference(i);
64      preference.setOnPreferenceChangeListener(this);
65      updatePreference(preference);
66    }
67  }
68
69  @Override
70  public boolean onPreferenceChange(Preference preference, Object newValue) {
71    Assert.isMainThread();
72    ThreadUtil.postOnUiThread(() -> updatePreference(preference));
73    return true;
74  }
75
76  private void updatePreference(Preference preference) {
77    if (preference instanceof EditTextPreference) {
78      EditTextPreference editTextPreference = (EditTextPreference) preference;
79      editTextPreference.setSummary(editTextPreference.getText());
80    }
81  }
82
83  @Override
84  public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
85    if (TextUtils.equals(
86        preference.getKey(), getString(R.string.vvm_config_override_load_current_key))) {
87      loadCurrentConfig();
88    }
89    return super.onPreferenceTreeClick(preferenceScreen, preference);
90  }
91
92  /**
93   * Loads the config for the currently carrier into the override values, from the dialer or the
94   * carrier config app. This is a "reset" button to load the defaults.
95   */
96  private void loadCurrentConfig() {
97    Context context = getActivity();
98    PhoneAccountHandle phoneAccountHandle =
99        context
100            .getSystemService(TelecomManager.class)
101            .getDefaultOutgoingPhoneAccount(PhoneAccount.SCHEME_VOICEMAIL);
102
103    PersistableBundle config =
104        VoicemailComponent.get(context).getVoicemailClient().getConfig(context, phoneAccountHandle);
105
106    for (int i = 0; i < getPreferenceScreen().getPreferenceCount(); i++) {
107      Preference preference = getPreferenceScreen().getPreference(i);
108      String key = preference.getKey();
109      if (!key.startsWith(CONFIG_OVERRIDE_KEY_PREFIX)) {
110        continue;
111      }
112
113      String configKey = key.substring(CONFIG_OVERRIDE_KEY_PREFIX.length());
114
115      if (configKey.endsWith("bool")) {
116        ((SwitchPreference) preference).setChecked(config.getBoolean(configKey));
117      } else if (configKey.endsWith("int")) {
118        ((EditTextPreference) preference).setText(String.valueOf(config.getInt(configKey)));
119      } else if (configKey.endsWith("string")) {
120        ((EditTextPreference) preference).setText(config.getString(configKey));
121      } else if (configKey.endsWith("string_array")) {
122        ((EditTextPreference) preference).setText(toCsv(config.getStringArray(configKey)));
123      } else {
124        throw Assert.createAssertionFailException("unknown type for key " + configKey);
125      }
126      updatePreference(preference);
127    }
128  }
129
130  public static boolean isOverridden(Context context) {
131    return StrictModeUtils.bypass(
132        () ->
133            PreferenceManager.getDefaultSharedPreferences(context)
134                .getBoolean(context.getString(R.string.vvm_config_override_enabled_key), false));
135  }
136
137  public static PersistableBundle getConfig(Context context) {
138    Assert.checkState(isOverridden(context));
139    PersistableBundle result = new PersistableBundle();
140
141    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
142    for (String key : preferences.getAll().keySet()) {
143      if (!key.startsWith(CONFIG_OVERRIDE_KEY_PREFIX)) {
144        continue;
145      }
146      String configKey = key.substring(CONFIG_OVERRIDE_KEY_PREFIX.length());
147      if (configKey.endsWith("bool")) {
148        result.putBoolean(configKey, preferences.getBoolean(key, false));
149      } else if (configKey.endsWith("int")) {
150        result.putInt(configKey, Integer.valueOf(preferences.getString(key, null)));
151      } else if (configKey.endsWith("string")) {
152        result.putString(configKey, preferences.getString(key, null));
153      } else if (configKey.endsWith("string_array")) {
154        result.putStringArray(configKey, fromCsv(preferences.getString(key, null)));
155      } else {
156        throw Assert.createAssertionFailException("unknown type for key " + configKey);
157      }
158    }
159    return result;
160  }
161
162  private static String toCsv(String[] array) {
163    if (array == null) {
164      return "";
165    }
166    StringBuilder result = new StringBuilder();
167    for (String element : array) {
168      if (result.length() != 0) {
169        result.append(",");
170      }
171      result.append(element);
172    }
173    return result.toString();
174  };
175
176  private static String[] fromCsv(String csv) {
177    return csv.split(",");
178  }
179}
180