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      1 /*
      2  * Copyright (C) 2015 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.dialer.util;
     18 
     19 import android.content.Context;
     20 import android.net.Uri;
     21 import android.telecom.PhoneAccount;
     22 import android.telecom.PhoneAccountHandle;
     23 import android.telecom.TelecomManager;
     24 import com.android.dialer.common.LogUtil;
     25 import com.android.dialer.compat.CompatUtils;
     26 import com.android.dialer.phonenumberutil.PhoneNumberHelper;
     27 import java.util.List;
     28 
     29 /** Utilities related to calls that can be used by non system apps. */
     30 public class CallUtil {
     31 
     32   /** Indicates that the video calling is not available. */
     33   public static final int VIDEO_CALLING_DISABLED = 0;
     34 
     35   /** Indicates that video calling is enabled, regardless of presence status. */
     36   public static final int VIDEO_CALLING_ENABLED = 1;
     37 
     38   /**
     39    * Indicates that video calling is enabled, but the availability of video call affordances is
     40    * determined by the presence status associated with contacts.
     41    */
     42   public static final int VIDEO_CALLING_PRESENCE = 2;
     43 
     44   private static boolean hasInitializedIsVideoEnabledState;
     45   private static boolean cachedIsVideoEnabledState;
     46 
     47   /** Return Uri with an appropriate scheme, accepting both SIP and usual phone call numbers. */
     48   public static Uri getCallUri(String number) {
     49     if (PhoneNumberHelper.isUriNumber(number)) {
     50       return Uri.fromParts(PhoneAccount.SCHEME_SIP, number, null);
     51     }
     52     return Uri.fromParts(PhoneAccount.SCHEME_TEL, number, null);
     53   }
     54 
     55   /** @return Uri that directly dials a user's voicemail inbox. */
     56   public static Uri getVoicemailUri() {
     57     return Uri.fromParts(PhoneAccount.SCHEME_VOICEMAIL, "", null);
     58   }
     59 
     60   /**
     61    * Determines if video calling is available, and if so whether presence checking is available as
     62    * well.
     63    *
     64    * <p>Returns a bitmask with {@link #VIDEO_CALLING_ENABLED} to indicate that video calling is
     65    * available, and {@link #VIDEO_CALLING_PRESENCE} if presence indication is also available.
     66    *
     67    * @param context The context
     68    * @return A bit-mask describing the current video capabilities.
     69    */
     70   public static int getVideoCallingAvailability(Context context) {
     71     if (!PermissionsUtil.hasPermission(context, android.Manifest.permission.READ_PHONE_STATE)
     72         || !CompatUtils.isVideoCompatible()) {
     73       return VIDEO_CALLING_DISABLED;
     74     }
     75     TelecomManager telecommMgr = (TelecomManager) context.getSystemService(Context.TELECOM_SERVICE);
     76     if (telecommMgr == null) {
     77       return VIDEO_CALLING_DISABLED;
     78     }
     79 
     80     List<PhoneAccountHandle> accountHandles = telecommMgr.getCallCapablePhoneAccounts();
     81     for (PhoneAccountHandle accountHandle : accountHandles) {
     82       PhoneAccount account = telecommMgr.getPhoneAccount(accountHandle);
     83       if (account != null) {
     84         if (account.hasCapabilities(PhoneAccount.CAPABILITY_VIDEO_CALLING)) {
     85           // Builds prior to N do not have presence support.
     86           if (!CompatUtils.isVideoPresenceCompatible()) {
     87             return VIDEO_CALLING_ENABLED;
     88           }
     89 
     90           int videoCapabilities = VIDEO_CALLING_ENABLED;
     91           if (account.hasCapabilities(PhoneAccount.CAPABILITY_VIDEO_CALLING_RELIES_ON_PRESENCE)) {
     92             videoCapabilities |= VIDEO_CALLING_PRESENCE;
     93           }
     94           return videoCapabilities;
     95         }
     96       }
     97     }
     98     return VIDEO_CALLING_DISABLED;
     99   }
    100 
    101   /**
    102    * Determines if one of the call capable phone accounts defined supports video calling.
    103    *
    104    * @param context The context.
    105    * @return {@code true} if one of the call capable phone accounts supports video calling, {@code
    106    *     false} otherwise.
    107    */
    108   public static boolean isVideoEnabled(Context context) {
    109     boolean isVideoEnabled = (getVideoCallingAvailability(context) & VIDEO_CALLING_ENABLED) != 0;
    110 
    111     // Log everytime the video enabled state changes.
    112     if (!hasInitializedIsVideoEnabledState) {
    113       LogUtil.i("CallUtil.isVideoEnabled", "isVideoEnabled: " + isVideoEnabled);
    114       hasInitializedIsVideoEnabledState = true;
    115       cachedIsVideoEnabledState = isVideoEnabled;
    116     } else if (cachedIsVideoEnabledState != isVideoEnabled) {
    117       LogUtil.i(
    118           "CallUtil.isVideoEnabled",
    119           "isVideoEnabled changed from %b to %b",
    120           cachedIsVideoEnabledState,
    121           isVideoEnabled);
    122       cachedIsVideoEnabledState = isVideoEnabled;
    123     }
    124 
    125     return isVideoEnabled;
    126   }
    127 
    128   /**
    129    * Determines if one of the call capable phone accounts defined supports calling with a subject
    130    * specified.
    131    *
    132    * @param context The context.
    133    * @return {@code true} if one of the call capable phone accounts supports calling with a subject
    134    *     specified, {@code false} otherwise.
    135    */
    136   public static boolean isCallWithSubjectSupported(Context context) {
    137     if (!PermissionsUtil.hasPermission(context, android.Manifest.permission.READ_PHONE_STATE)
    138         || !CompatUtils.isCallSubjectCompatible()) {
    139       return false;
    140     }
    141     TelecomManager telecommMgr = (TelecomManager) context.getSystemService(Context.TELECOM_SERVICE);
    142     if (telecommMgr == null) {
    143       return false;
    144     }
    145 
    146     List<PhoneAccountHandle> accountHandles = telecommMgr.getCallCapablePhoneAccounts();
    147     for (PhoneAccountHandle accountHandle : accountHandles) {
    148       PhoneAccount account = telecommMgr.getPhoneAccount(accountHandle);
    149       if (account != null && account.hasCapabilities(PhoneAccount.CAPABILITY_CALL_SUBJECT)) {
    150         return true;
    151       }
    152     }
    153     return false;
    154   }
    155 }
    156