1 files changed, 212 insertions, 0 deletions
diff --git a/java/com/android/dialer/telecom/TelecomUtil.java b/java/com/android/dialer/telecom/TelecomUtil.java
new file mode 100644
index 000000000..a11e7f77a
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+++ b/java/com/android/dialer/telecom/TelecomUtil.java
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+/*
+ * Copyright (C) 2015 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.dialer.telecom;
+
+import android.Manifest;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.net.Uri;
+import android.provider.CallLog.Calls;
+import android.support.annotation.Nullable;
+import android.support.v4.content.ContextCompat;
+import android.telecom.PhoneAccount;
+import android.telecom.PhoneAccountHandle;
+import android.telecom.TelecomManager;
+import android.text.TextUtils;
+import android.util.Log;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Performs permission checks before calling into TelecomManager. Each method is self-explanatory -
+ * perform the required check and return the fallback default if the permission is missing,
+ * otherwise return the value from TelecomManager.
+ */
+public class TelecomUtil {
+
+  private static final String TAG = "TelecomUtil";
+  private static boolean sWarningLogged = false;
+
+  public static void showInCallScreen(Context context, boolean showDialpad) {
+    if (hasReadPhoneStatePermission(context)) {
+      try {
+        getTelecomManager(context).showInCallScreen(showDialpad);
+      } catch (SecurityException e) {
+        // Just in case
+        Log.w(TAG, "TelecomManager.showInCallScreen called without permission.");
+      }
+    }
+  }
+
+  public static void silenceRinger(Context context) {
+    if (hasModifyPhoneStatePermission(context)) {
+      try {
+        getTelecomManager(context).silenceRinger();
+      } catch (SecurityException e) {
+        // Just in case
+        Log.w(TAG, "TelecomManager.silenceRinger called without permission.");
+      }
+    }
+  }
+
+  public static void cancelMissedCallsNotification(Context context) {
+    if (hasModifyPhoneStatePermission(context)) {
+      try {
+        getTelecomManager(context).cancelMissedCallsNotification();
+      } catch (SecurityException e) {
+        Log.w(TAG, "TelecomManager.cancelMissedCalls called without permission.");
+      }
+    }
+  }
+
+  public static Uri getAdnUriForPhoneAccount(Context context, PhoneAccountHandle handle) {
+    if (hasModifyPhoneStatePermission(context)) {
+      try {
+        return getTelecomManager(context).getAdnUriForPhoneAccount(handle);
+      } catch (SecurityException e) {
+        Log.w(TAG, "TelecomManager.getAdnUriForPhoneAccount called without permission.");
+      }
+    }
+    return null;
+  }
+
+  public static boolean handleMmi(
+      Context context, String dialString, @Nullable PhoneAccountHandle handle) {
+    if (hasModifyPhoneStatePermission(context)) {
+      try {
+        if (handle == null) {
+          return getTelecomManager(context).handleMmi(dialString);
+        } else {
+          return getTelecomManager(context).handleMmi(dialString, handle);
+        }
+      } catch (SecurityException e) {
+        Log.w(TAG, "TelecomManager.handleMmi called without permission.");
+      }
+    }
+    return false;
+  }
+
+  @Nullable
+  public static PhoneAccountHandle getDefaultOutgoingPhoneAccount(
+      Context context, String uriScheme) {
+    if (hasReadPhoneStatePermission(context)) {
+      return getTelecomManager(context).getDefaultOutgoingPhoneAccount(uriScheme);
+    }
+    return null;
+  }
+
+  public static PhoneAccount getPhoneAccount(Context context, PhoneAccountHandle handle) {
+    return getTelecomManager(context).getPhoneAccount(handle);
+  }
+
+  public static List<PhoneAccountHandle> getCallCapablePhoneAccounts(Context context) {
+    if (hasReadPhoneStatePermission(context)) {
+      return getTelecomManager(context).getCallCapablePhoneAccounts();
+    }
+    return new ArrayList<>();
+  }
+
+  public static boolean isInCall(Context context) {
+    if (hasReadPhoneStatePermission(context)) {
+      return getTelecomManager(context).isInCall();
+    }
+    return false;
+  }
+
+  public static boolean isVoicemailNumber(
+      Context context, PhoneAccountHandle accountHandle, String number) {
+    if (hasReadPhoneStatePermission(context)) {
+      return getTelecomManager(context).isVoiceMailNumber(accountHandle, number);
+    }
+    return false;
+  }
+
+  @Nullable
+  public static String getVoicemailNumber(Context context, PhoneAccountHandle accountHandle) {
+    if (hasReadPhoneStatePermission(context)) {
+      return getTelecomManager(context).getVoiceMailNumber(accountHandle);
+    }
+    return null;
+  }
+
+  /**
+   * Tries to place a call using the {@link TelecomManager}.
+   *
+   * @param context context.
+   * @param intent the call intent.
+   * @return {@code true} if we successfully attempted to place the call, {@code false} if it failed
+   *     due to a permission check.
+   */
+  public static boolean placeCall(Context context, Intent intent) {
+    if (hasCallPhonePermission(context)) {
+      getTelecomManager(context).placeCall(intent.getData(), intent.getExtras());
+      return true;
+    }
+    return false;
+  }
+
+  public static Uri getCallLogUri(Context context) {
+    return hasReadWriteVoicemailPermissions(context)
+        ? Calls.CONTENT_URI_WITH_VOICEMAIL
+        : Calls.CONTENT_URI;
+  }
+
+  public static boolean hasReadWriteVoicemailPermissions(Context context) {
+    return isDefaultDialer(context)
+        || (hasPermission(context, Manifest.permission.READ_VOICEMAIL)
+            && hasPermission(context, Manifest.permission.WRITE_VOICEMAIL));
+  }
+
+  public static boolean hasModifyPhoneStatePermission(Context context) {
+    return isDefaultDialer(context)
+        || hasPermission(context, Manifest.permission.MODIFY_PHONE_STATE);
+  }
+
+  public static boolean hasReadPhoneStatePermission(Context context) {
+    return isDefaultDialer(context) || hasPermission(context, Manifest.permission.READ_PHONE_STATE);
+  }
+
+  public static boolean hasCallPhonePermission(Context context) {
+    return isDefaultDialer(context) || hasPermission(context, Manifest.permission.CALL_PHONE);
+  }
+
+  private static boolean hasPermission(Context context, String permission) {
+    return ContextCompat.checkSelfPermission(context, permission)
+        == PackageManager.PERMISSION_GRANTED;
+  }
+
+  public static boolean isDefaultDialer(Context context) {
+    final boolean result =
+        TextUtils.equals(
+            context.getPackageName(), getTelecomManager(context).getDefaultDialerPackage());
+    if (result) {
+      sWarningLogged = false;
+    } else {
+      if (!sWarningLogged) {
+        // Log only once to prevent spam.
+        Log.w(TAG, "Dialer is not currently set to be default dialer");
+        sWarningLogged = true;
+      }
+    }
+    return result;
+  }
+
+  private static TelecomManager getTelecomManager(Context context) {
+    return (TelecomManager) context.getSystemService(Context.TELECOM_SERVICE);
+  }
+}