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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.merchantpos.order
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.View.INVISIBLE
import android.view.ViewGroup
import android.widget.TextView
import androidx.fragment.app.Fragment
import androidx.fragment.app.activityViewModels
import androidx.lifecycle.Observer
import androidx.recyclerview.widget.GridLayoutManager
import androidx.recyclerview.widget.RecyclerView.Adapter
import androidx.recyclerview.widget.RecyclerView.ViewHolder
import kotlinx.android.synthetic.main.fragment_products.*
import net.taler.merchantpos.MainViewModel
import net.taler.merchantpos.R
import net.taler.merchantpos.config.ConfigProduct
import net.taler.merchantpos.order.ProductAdapter.ProductViewHolder
interface ProductSelectionListener {
fun onProductSelected(product: ConfigProduct)
}
class ProductsFragment : Fragment(), ProductSelectionListener {
private val viewModel: MainViewModel by activityViewModels()
private val orderManager by lazy { viewModel.orderManager }
private val adapter = ProductAdapter(this)
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
return inflater.inflate(R.layout.fragment_products, container, false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
productsList.apply {
adapter = this@ProductsFragment.adapter
layoutManager = GridLayoutManager(requireContext(), 3)
}
orderManager.products.observe(viewLifecycleOwner, Observer { products ->
if (products == null) {
adapter.setItems(emptyList())
} else {
adapter.setItems(products)
}
progressBar.visibility = INVISIBLE
})
}
override fun onProductSelected(product: ConfigProduct) {
orderManager.addProduct(orderManager.currentOrderId.value!!, product)
}
}
private class ProductAdapter(
private val listener: ProductSelectionListener
) : Adapter<ProductViewHolder>() {
private val products = ArrayList<ConfigProduct>()
override fun getItemCount() = products.size
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ProductViewHolder {
val view =
LayoutInflater.from(parent.context).inflate(R.layout.list_item_product, parent, false)
return ProductViewHolder(view)
}
override fun onBindViewHolder(holder: ProductViewHolder, position: Int) {
holder.bind(products[position])
}
fun setItems(items: List<ConfigProduct>) {
products.clear()
products.addAll(items)
notifyDataSetChanged()
}
private inner class ProductViewHolder(private val v: View) : ViewHolder(v) {
private val name: TextView = v.findViewById(R.id.name)
private val price: TextView = v.findViewById(R.id.price)
fun bind(product: ConfigProduct) {
name.text = product.localizedDescription
price.text = product.price.amountStr
v.setOnClickListener { listener.onProductSelected(product) }
}
}
}
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