1 files changed, 120 insertions, 0 deletions
diff --git a/java/com/android/voicemailomtp/sync/OmtpVvmSourceManager.java b/java/com/android/voicemailomtp/sync/OmtpVvmSourceManager.java
new file mode 100644
index 000000000..ad3c025cf
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+++ b/java/com/android/voicemailomtp/sync/OmtpVvmSourceManager.java
@@ -0,0 +1,120 @@
+/*
+ * 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.voicemailomtp.sync;
+
+import android.content.Context;
+import android.telecom.PhoneAccountHandle;
+import android.telephony.PhoneStateListener;
+import android.telephony.TelephonyManager;
+
+import com.android.voicemailomtp.VoicemailStatus;
+import com.android.voicemailomtp.VvmPhoneStateListener;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * A singleton class designed to remember the active OMTP visual voicemail sources. Because a
+ * voicemail source is tied 1:1 to a phone account, the phone account handle is used as the key
+ * for each voicemail source and the associated data.
+ */
+public class OmtpVvmSourceManager {
+    public static final String TAG = "OmtpVvmSourceManager";
+
+    private static OmtpVvmSourceManager sInstance = new OmtpVvmSourceManager();
+
+    private Context mContext;
+    private TelephonyManager mTelephonyManager;
+    // Each phone account is associated with a phone state listener for updates to whether the
+    // device is able to sync.
+    private Set<PhoneAccountHandle> mActiveVvmSources;
+    private Map<PhoneAccountHandle, PhoneStateListener> mPhoneStateListenerMap;
+
+    /**
+     * Private constructor. Instance should only be acquired through getInstance().
+     */
+    private OmtpVvmSourceManager() {}
+
+    public static OmtpVvmSourceManager getInstance(Context context) {
+        sInstance.setup(context);
+        return sInstance;
+    }
+
+    /**
+     * Set the context and system services so they do not need to be retrieved every time.
+     * @param context The context to get the subscription and telephony manager for.
+     */
+    private void setup(Context context) {
+        if (mContext == null) {
+            mContext = context;
+            mTelephonyManager = (TelephonyManager)
+                    mContext.getSystemService(Context.TELEPHONY_SERVICE);
+            mActiveVvmSources = Collections.newSetFromMap(
+                    new ConcurrentHashMap<PhoneAccountHandle, Boolean>(8, 0.9f, 1));
+            mPhoneStateListenerMap =
+                    new ConcurrentHashMap<PhoneAccountHandle, PhoneStateListener>(8, 0.9f, 1);
+        }
+    }
+
+    public void addSource(PhoneAccountHandle phoneAccount) {
+        mActiveVvmSources.add(phoneAccount);
+    }
+
+    public void removeSource(PhoneAccountHandle phoneAccount) {
+        // TODO: should use OmtpVvmCarrierConfigHelper to handle the event. But currently it
+        // couldn't handle events on removed SIMs
+        VoicemailStatus.disable(mContext, phoneAccount);
+        removePhoneStateListener(phoneAccount);
+        mActiveVvmSources.remove(phoneAccount);
+    }
+
+    public void addPhoneStateListener(PhoneAccountHandle phoneAccount) {
+        if (!mPhoneStateListenerMap.containsKey(phoneAccount)) {
+            VvmPhoneStateListener phoneStateListener = new VvmPhoneStateListener(mContext,
+                    phoneAccount);
+            mPhoneStateListenerMap.put(phoneAccount, phoneStateListener);
+            mTelephonyManager.createForPhoneAccountHandle(phoneAccount)
+                    .listen(phoneStateListener, PhoneStateListener.LISTEN_SERVICE_STATE);
+        }
+    }
+
+    public void removePhoneStateListener(PhoneAccountHandle phoneAccount) {
+        PhoneStateListener phoneStateListener =
+                mPhoneStateListenerMap.remove(phoneAccount);
+        mTelephonyManager.createForPhoneAccountHandle(phoneAccount).listen(phoneStateListener, 0);
+    }
+
+    public Set<PhoneAccountHandle> getOmtpVvmSources() {
+        return mActiveVvmSources;
+    }
+
+    /**
+     * Check if a certain account is registered.
+     *
+     * @param phoneAccount The account to look for.
+     * @return {@code true} if the account is in the list of registered OMTP voicemail sources.
+     * {@code false} otherwise.
+     */
+    public boolean isVvmSourceRegistered(PhoneAccountHandle phoneAccount) {
+        if (phoneAccount == null) {
+            return false;
+        }
+
+        return mActiveVvmSources.contains(phoneAccount);
+    }
+}
+\ No newline at end of file