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/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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.android.voicemail.impl;
import android.content.Context;
import android.net.Uri;
import android.os.PersistableBundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.annotation.VisibleForTesting;
import android.util.ArrayMap;
import com.android.dialer.configprovider.ConfigProviderBindings;
import com.android.voicemail.impl.utils.XmlUtils;
import com.google.common.collect.ComparisonChain;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Map;
import java.util.Map.Entry;
import java.util.SortedSet;
import java.util.TreeSet;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
/** Load and caches dialer vvm config from res/xml/vvm_config.xml */
public class DialerVvmConfigManager {
private static class ConfigEntry implements Comparable<ConfigEntry> {
final CarrierIdentifierMatcher matcher;
final PersistableBundle config;
ConfigEntry(CarrierIdentifierMatcher matcher, PersistableBundle config) {
this.matcher = matcher;
this.config = config;
}
/**
* A more specific matcher should return a negative value to have higher priority over generic
* matchers.
*/
@Override
public int compareTo(@NonNull ConfigEntry other) {
ComparisonChain comparisonChain = ComparisonChain.start();
if (!(matcher.gid1().isPresent() && other.matcher.gid1().isPresent())) {
if (matcher.gid1().isPresent()) {
return -1;
} else if (other.matcher.gid1().isPresent()) {
return 1;
} else {
return 0;
}
} else {
comparisonChain = comparisonChain.compare(matcher.gid1().get(), other.matcher.gid1().get());
}
return comparisonChain.compare(matcher.mccMnc(), other.matcher.mccMnc()).result();
}
}
private static final String TAG_PERSISTABLEMAP = "pbundle_as_map";
/**
* A string array of MCCMNC the config applies to. Addtional filters should be appended as the URI
* query parameter format.
*
* <p>For example{@code <string-array name="mccmnc"> <item value="12345?gid1=foo"/> <item
* value="67890"/> </string-array> }
*
* @see #KEY_GID1
*/
@VisibleForTesting static final String KEY_MCCMNC = "mccmnc";
/**
* Additional query parameter in {@link #KEY_MCCMNC} to filter by the Group ID level 1.
*
* @see CarrierIdentifierMatcher#gid1()
*/
private static final String KEY_GID1 = "gid1";
private static final String KEY_FEATURE_FLAG_NAME = "feature_flag_name";
private static Map<String, SortedSet<ConfigEntry>> cachedConfigs;
private final Map<String, SortedSet<ConfigEntry>> configs;
public DialerVvmConfigManager(Context context) {
if (cachedConfigs == null) {
cachedConfigs = loadConfigs(context, context.getResources().getXml(R.xml.vvm_config));
}
configs = cachedConfigs;
}
@VisibleForTesting
DialerVvmConfigManager(Context context, XmlPullParser parser) {
configs = loadConfigs(context, parser);
}
@Nullable
public PersistableBundle getConfig(CarrierIdentifier carrierIdentifier) {
if (!configs.containsKey(carrierIdentifier.mccMnc())) {
return null;
}
for (ConfigEntry configEntry : configs.get(carrierIdentifier.mccMnc())) {
if (configEntry.matcher.matches(carrierIdentifier)) {
return configEntry.config;
}
}
return null;
}
private static Map<String, SortedSet<ConfigEntry>> loadConfigs(
Context context, XmlPullParser parser) {
Map<String, SortedSet<ConfigEntry>> configs = new ArrayMap<>();
try {
ArrayList list = readBundleList(parser);
for (Object object : list) {
if (!(object instanceof PersistableBundle)) {
throw new IllegalArgumentException("PersistableBundle expected, got " + object);
}
PersistableBundle bundle = (PersistableBundle) object;
if (bundle.containsKey(KEY_FEATURE_FLAG_NAME)
&& !ConfigProviderBindings.get(context)
.getBoolean(bundle.getString(KEY_FEATURE_FLAG_NAME), false)) {
continue;
}
String[] identifiers = bundle.getStringArray(KEY_MCCMNC);
if (identifiers == null) {
throw new IllegalArgumentException("MCCMNC is null");
}
for (String identifier : identifiers) {
Uri uri = Uri.parse(identifier);
String mccMnc = uri.getPath();
SortedSet<ConfigEntry> set;
if (configs.containsKey(mccMnc)) {
set = configs.get(mccMnc);
} else {
// Need a SortedSet so matchers will be sorted by priority.
set = new TreeSet<>();
configs.put(mccMnc, set);
}
CarrierIdentifierMatcher.Builder matcherBuilder = CarrierIdentifierMatcher.builder();
matcherBuilder.setMccMnc(mccMnc);
if (uri.getQueryParameterNames().contains(KEY_GID1)) {
matcherBuilder.setGid1(uri.getQueryParameter(KEY_GID1));
}
set.add(new ConfigEntry(matcherBuilder.build(), bundle));
}
}
} catch (IOException | XmlPullParserException e) {
throw new RuntimeException(e);
}
return configs;
}
@Nullable
public static ArrayList readBundleList(XmlPullParser in)
throws IOException, XmlPullParserException {
final int outerDepth = in.getDepth();
int event;
while (((event = in.next()) != XmlPullParser.END_DOCUMENT)
&& (event != XmlPullParser.END_TAG || in.getDepth() < outerDepth)) {
if (event == XmlPullParser.START_TAG) {
final String startTag = in.getName();
final String[] tagName = new String[1];
in.next();
return XmlUtils.readThisListXml(in, startTag, tagName, new MyReadMapCallback(), false);
}
}
return null;
}
public static PersistableBundle restoreFromXml(XmlPullParser in)
throws IOException, XmlPullParserException {
final int outerDepth = in.getDepth();
final String startTag = in.getName();
final String[] tagName = new String[1];
int event;
while (((event = in.next()) != XmlPullParser.END_DOCUMENT)
&& (event != XmlPullParser.END_TAG || in.getDepth() < outerDepth)) {
if (event == XmlPullParser.START_TAG) {
ArrayMap<String, ?> map =
XmlUtils.readThisArrayMapXml(in, startTag, tagName, new MyReadMapCallback());
PersistableBundle result = new PersistableBundle();
for (Entry<String, ?> entry : map.entrySet()) {
Object value = entry.getValue();
if (value instanceof Integer) {
result.putInt(entry.getKey(), (int) value);
} else if (value instanceof Boolean) {
result.putBoolean(entry.getKey(), (boolean) value);
} else if (value instanceof String) {
result.putString(entry.getKey(), (String) value);
} else if (value instanceof String[]) {
result.putStringArray(entry.getKey(), (String[]) value);
} else if (value instanceof PersistableBundle) {
result.putPersistableBundle(entry.getKey(), (PersistableBundle) value);
}
}
return result;
}
}
return PersistableBundle.EMPTY;
}
static class MyReadMapCallback implements XmlUtils.ReadMapCallback {
@Override
public Object readThisUnknownObjectXml(XmlPullParser in, String tag)
throws XmlPullParserException, IOException {
if (TAG_PERSISTABLEMAP.equals(tag)) {
return restoreFromXml(in);
}
throw new XmlPullParserException("Unknown tag=" + tag);
}
}
}
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