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package com.android.dialer.voicemail;
import android.content.Context;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.preference.PreferenceManager;
import android.support.annotation.Nullable;
import com.android.dialer.calllog.CallLogQueryHandler;
/**
* Helper class to check whether visual voicemail is enabled.
*
* Call isVisualVoicemailEnabled() to retrieve the result.
*
* The result is cached and saved in a SharedPreferences, stored as a boolean in
* PREF_KEY_HAS_ACTIVE_VOICEMAIL_PROVIDER. Every time a new instance is created, it will try to
* restore the cached result from the SharedPreferences.
*
* Call asyncUpdate() to make a CallLogQuery to check the actual status. This is a async call so
* isVisualVoicemailEnabled() will not be affected immediately.
*
* If the status has changed as a result of asyncUpdate(),
* Callback.onVisualVoicemailEnabledStatusChanged() will be called with the new value.
*/
public class VisualVoicemailEnabledChecker implements CallLogQueryHandler.Listener {
public static final String PREF_KEY_HAS_ACTIVE_VOICEMAIL_PROVIDER =
"has_active_voicemail_provider";
private SharedPreferences mPrefs;
private boolean mHasActiveVoicemailProvider;
private CallLogQueryHandler mCallLogQueryHandler;
private VoicemailStatusHelper mVoicemailStatusHelper;
private Context mContext;
public interface Callback {
/**
* Callback to notify enabled status has changed to the @param newValue
*/
void onVisualVoicemailEnabledStatusChanged(boolean newValue);
}
private Callback mCallback;
public VisualVoicemailEnabledChecker(Context context, @Nullable Callback callback) {
mContext = context;
mCallback = callback;
mPrefs = PreferenceManager.getDefaultSharedPreferences(mContext);
mVoicemailStatusHelper = new VoicemailStatusHelperImpl();
mHasActiveVoicemailProvider = mPrefs.getBoolean(PREF_KEY_HAS_ACTIVE_VOICEMAIL_PROVIDER,
false);
}
/**
* @return whether visual voicemail is enabled. Result is cached, call asyncUpdate() to
* update the result.
*/
public boolean isVisualVoicemailEnabled() {
return mHasActiveVoicemailProvider;
}
/**
* Perform an async query into the system to check the status of visual voicemail.
* If the status has changed, Callback.onVisualVoicemailEnabledStatusChanged() will be called.
*/
public void asyncUpdate() {
mCallLogQueryHandler =
new CallLogQueryHandler(mContext, mContext.getContentResolver(), this);
mCallLogQueryHandler.fetchVoicemailStatus();
}
@Override
public void onVoicemailStatusFetched(Cursor statusCursor) {
boolean hasActiveVoicemailProvider =
mVoicemailStatusHelper.getNumberActivityVoicemailSources(statusCursor) > 0;
if (hasActiveVoicemailProvider != mHasActiveVoicemailProvider) {
mHasActiveVoicemailProvider = hasActiveVoicemailProvider;
mPrefs.edit().putBoolean(PREF_KEY_HAS_ACTIVE_VOICEMAIL_PROVIDER,
mHasActiveVoicemailProvider);
if (mCallback != null) {
mCallback.onVisualVoicemailEnabledStatusChanged(mHasActiveVoicemailProvider);
}
}
}
@Override
public void onVoicemailUnreadCountFetched(Cursor cursor) {
// Do nothing
}
@Override
public boolean onCallsFetched(Cursor combinedCursor) {
// Do nothing
return false;
}
}
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