1 files changed, 105 insertions, 0 deletions
diff --git a/java/com/android/dialer/app/calllog/calllogcache/CallLogCache.java b/java/com/android/dialer/app/calllog/calllogcache/CallLogCache.java
new file mode 100644
index 000000000..7645a333e
--- /dev/null
+++ b/java/com/android/dialer/app/calllog/calllogcache/CallLogCache.java
@@ -0,0 +1,105 @@
+/*
+ * 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.app.calllog.calllogcache;
+
+import android.content.Context;
+import android.telecom.PhoneAccountHandle;
+import com.android.dialer.app.calllog.CallLogAdapter;
+import com.android.dialer.compat.CompatUtils;
+import com.android.dialer.util.CallUtil;
+
+/**
+ * This is the base class for the CallLogCaches.
+ *
+ * <p>Keeps a cache of recently made queries to the Telecom/Telephony processes. The aim of this
+ * cache is to reduce the number of cross-process requests to TelecomManager, which can negatively
+ * affect performance.
+ *
+ * <p>This is designed with the specific use case of the {@link CallLogAdapter} in mind.
+ */
+public abstract class CallLogCache {
+  // TODO: Dialer should be fixed so as not to check isVoicemail() so often but at the time of
+  // this writing, that was a much larger undertaking than creating this cache.
+
+  protected final Context mContext;
+
+  private boolean mHasCheckedForVideoAvailability;
+  private int mVideoAvailability;
+
+  public CallLogCache(Context context) {
+    mContext = context;
+  }
+
+  /** Return the most compatible version of the TelecomCallLogCache. */
+  public static CallLogCache getCallLogCache(Context context) {
+    if (CompatUtils.isClassAvailable("android.telecom.PhoneAccountHandle")) {
+      return new CallLogCacheLollipopMr1(context);
+    }
+    return new CallLogCacheLollipop(context);
+  }
+
+  public void reset() {
+    mHasCheckedForVideoAvailability = false;
+    mVideoAvailability = 0;
+  }
+
+  /**
+   * Returns true if the given number is the number of the configured voicemail. To be able to
+   * mock-out this, it is not a static method.
+   */
+  public abstract boolean isVoicemailNumber(PhoneAccountHandle accountHandle, CharSequence number);
+
+  /**
+   * Returns {@code true} when the current sim supports video calls, regardless of the value in a
+   * contact's {@link android.provider.ContactsContract.CommonDataKinds.Phone#CARRIER_PRESENCE}
+   * column.
+   */
+  public boolean isVideoEnabled() {
+    if (!mHasCheckedForVideoAvailability) {
+      mVideoAvailability = CallUtil.getVideoCallingAvailability(mContext);
+      mHasCheckedForVideoAvailability = true;
+    }
+    return (mVideoAvailability & CallUtil.VIDEO_CALLING_ENABLED) != 0;
+  }
+
+  /**
+   * Returns {@code true} when the current sim supports checking video calling capabilities via the
+   * {@link android.provider.ContactsContract.CommonDataKinds.Phone#CARRIER_PRESENCE} column.
+   */
+  public boolean canRelyOnVideoPresence() {
+    if (!mHasCheckedForVideoAvailability) {
+      mVideoAvailability = CallUtil.getVideoCallingAvailability(mContext);
+      mHasCheckedForVideoAvailability = true;
+    }
+    return (mVideoAvailability & CallUtil.VIDEO_CALLING_PRESENCE) != 0;
+  }
+
+  /** Extract account label from PhoneAccount object. */
+  public abstract String getAccountLabel(PhoneAccountHandle accountHandle);
+
+  /** Extract account color from PhoneAccount object. */
+  public abstract int getAccountColor(PhoneAccountHandle accountHandle);
+
+  /**
+   * Determines if the PhoneAccount supports specifying a call subject (i.e. calling with a note)
+   * for outgoing calls.
+   *
+   * @param accountHandle The PhoneAccount handle.
+   * @return {@code true} if calling with a note is supported, {@code false} otherwise.
+   */
+  public abstract boolean doesAccountSupportCallSubject(PhoneAccountHandle accountHandle);
+}