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package com.mapbox.mapboxsdk.location;
import android.os.Handler;
/**
* Class controls the location stale state when the {@link android.location.Location} hasn't
* been updated in 'x' amount of time. {@link LocationComponentOptions#staleStateTimeout()} can be used to
* control the amount of time before the location's considered stale.
* {@link LocationComponentOptions#enableStaleState()} is available for disabling this behaviour.
*/
class StaleStateManager {
private boolean isEnabled;
private final OnLocationStaleListener innerOnLocationStaleListeners;
private final Handler handler;
private boolean isStale = true;
private long delayTime;
StaleStateManager(OnLocationStaleListener innerListener, LocationComponentOptions options) {
innerOnLocationStaleListeners = innerListener;
handler = new Handler();
isEnabled = options.enableStaleState();
delayTime = options.staleStateTimeout();
}
private Runnable staleStateRunnable = new Runnable() {
@Override
public void run() {
setState(true);
}
};
void setEnabled(boolean enabled) {
if (enabled) {
setState(isStale);
} else if (isEnabled) {
onStop();
innerOnLocationStaleListeners.onStaleStateChange(false);
}
isEnabled = enabled;
}
boolean isStale() {
return isStale;
}
void updateLatestLocationTime() {
setState(false);
postTheCallback();
}
void setDelayTime(long delayTime) {
this.delayTime = delayTime;
postTheCallback();
}
void onStart() {
if (!isStale) {
postTheCallback();
}
}
void onStop() {
handler.removeCallbacksAndMessages(null);
}
private void postTheCallback() {
handler.removeCallbacksAndMessages(null);
handler.postDelayed(staleStateRunnable, delayTime);
}
private void setState(boolean stale) {
if (stale != isStale) {
isStale = stale;
if (isEnabled) {
innerOnLocationStaleListeners.onStaleStateChange(stale);
}
}
}
}
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