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path: root/cashier/src/main/java/net/taler/cashier/MainActivity.kt
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/*
 * This file is part of GNU Taler
 * (C) 2020 Taler Systems S.A.
 *
 * GNU Taler is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 3, or (at your option) any later version.
 *
 * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

package net.taler.cashier

import android.content.Intent
import android.content.Intent.ACTION_MAIN
import android.content.Intent.CATEGORY_HOME
import android.content.Intent.FLAG_ACTIVITY_NEW_TASK
import android.os.Bundle
import androidx.activity.viewModels
import androidx.appcompat.app.AppCompatActivity
import androidx.navigation.NavController
import androidx.navigation.fragment.NavHostFragment
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    private val viewModel: MainViewModel by viewModels()
    private val configManager by lazy { viewModel.configManager}
    private lateinit var nav: NavController

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        setSupportActionBar(toolbar)
        val navHostFragment =
            supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment
        nav = navHostFragment.navController
    }

    override fun onStart() {
        super.onStart()
        if (!configManager.hasConfig()) {
            nav.navigate(configManager.configDestination)
        }
    }

    override fun onBackPressed() {
        if (!configManager.hasConfig() && nav.currentDestination?.id == R.id.configFragment) {
            // we are in the configuration screen and need a config to continue
            val intent = Intent(ACTION_MAIN).apply {
                addCategory(CATEGORY_HOME)
                flags = FLAG_ACTIVITY_NEW_TASK
            }
            startActivity(intent)
        } else {
            super.onBackPressed()
        }
    }

}