LEMUBIT/PayantAndroid

package com.lemubit.lemuel.androidpayant.utils;

import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;

import com.lemubit.lemuel.androidpayant.Payant;
import com.lemubit.lemuel.androidpayant.exceptions.PayantNotInitializedException;

import org.jetbrains.annotations.Contract;

/**
 * @author lemuel
 */
public class Validate {


    /**
     * Check if Payant SDK has been initialized
     *
     * @throws PayantNotInitializedException
     */
    public static void payantInitialized() throws PayantNotInitializedException {
        if (!Payant.isPayantInitialized()) {
            throw new PayantNotInitializedException("Payant SDK has not been initialized. Use 'Payant.init()' to initialize.");
        }
    }

    /**
     * To check if internet permission has been granted in the Android Manifest
     *
     * @param context - Application context for current run
     */
    public static void internetPermissionAvailable(Context context) {
        valueNotNull(context, "context");
        PackageManager packageManager = context.getPackageManager();
        int hasPermission = packageManager.checkPermission(Manifest.permission.INTERNET, context.getPackageName());
        if (hasPermission ==
                PackageManager.PERMISSION_DENIED) {
            throw new IllegalStateException("It seems you do not want us to access the internet :(. " +
                    "Please add the intenet permission to your AndroidManifest.xml");
        }
    }

    @Contract("null, _ -> fail")
    public static void valueNotNull(Object arg, String name) {
        if (arg == null) {
            throw new NullPointerException("Argument '" + name + "' cannot be null");
        }
    }


}