Next-Location/app/src/main/java/com/a1/nextlocation/data/RouteHandler.java

package com.a1.nextlocation.data;

import org.osmdroid.views.overlay.Polyline;

/**
 * singleton to track the current route that is being followed
 */
public enum RouteHandler {
    INSTANCE;

    private boolean isFollowingRoute = false;
    private Route currentRoute;
    private int stepCount = 0;
    private RouteFinishedListener routeFinishedListener;
    private long startedTime;

    private Polyline currentRouteLine;

    public void setCurrentRouteLine(Polyline currentRouteLine) {
        this.currentRouteLine = currentRouteLine;
    }

    public Polyline getCurrentRouteLine() {
        return currentRouteLine;
    }

    public void setRouteFinishedListener(RouteFinishedListener routeFinishedListener) {
        this.routeFinishedListener = routeFinishedListener;
    }

    public int getStepCount() {
        return stepCount;
    }

    public void addStep() {
        stepCount++;
    }

    public void finishRoute() {
        stepCount = 0;
        isFollowingRoute = false;
        currentRoute = null;
        currentRouteLine = null;
        StaticData.INSTANCE.addTimeWalked(System.currentTimeMillis()-startedTime);
        startedTime = 0;
    }

    public void followRoute(Route route) {
        this.currentRoute = route;
        setFollowingRoute(true);
        startedTime = System.currentTimeMillis();
    }

    public boolean isFollowingRoute(Route route) {
        return isFollowingRoute && route.equals(currentRoute);
    }
    public void setFollowingRoute(boolean followingRoute) {
        isFollowingRoute = followingRoute;
    }

    public boolean isFollowingRoute() {
        return isFollowingRoute;
    }

    public Route getCurrentRoute() {
        return currentRoute;
    }

    @FunctionalInterface
    public interface RouteFinishedListener {
        void onRouteFinish();
    }
}