TemperatureProbeAdapter.kt

package com.favega.farmnet

import android.app.Activity
import android.support.design.widget.Snackbar
import android.support.v7.widget.CardView
import android.support.v7.widget.RecyclerView
import android.view.LayoutInflater
import android.view.ViewGroup
import android.widget.Button
import android.widget.CheckBox
import android.widget.EditText
import android.widget.TextView
import butterknife.bindView
import retrofit2.adapter.rxjava.HttpException
import rx.android.schedulers.AndroidSchedulers
import rx.schedulers.Schedulers
import java.net.UnknownHostException

class TemperatureProbeAdapter(val probes: MutableList<TemperatureProbe>,
                              val temperatureProbeService: FarmnetTemperatureProbeService,
                              val activity: Activity) :
        RecyclerView.Adapter<TemperatureProbeAdapter.TemperatureProbeCard>() {

    inner class TemperatureProbeCard(val card: CardView) : RecyclerView.ViewHolder(card) {
        private val serialNumberView: TextView by bindView(R.id.temperature_probe_serial_number)
        private val temperatureView: TextView by bindView(R.id.temperature_probe_temperature)
        private val alarmCheckbox : CheckBox by bindView(R.id.temperature_probe_alarm_enabled)
        private val alarmLowView: EditText by bindView(R.id.alarm_low)
        private val alarmHighView: EditText by bindView(R.id.alarm_high)
        val save : Button by bindView(R.id.temperature_probe_save)

        init {
            save.setOnClickListener { save(this) }
        }

        var serialNumber : String
            get() = serialNumberView.text.toString()
            set(value) { serialNumberView.text = value }
        var temperature : Float?
            get() = temperatureView.text.toString().toFloat()
            set(value) {
                if (value != null)
                    temperatureView.text = "%.2f °C".format(value)
                else
                    temperatureView.text = "-"
            }
        var alarmEnabled: Boolean
            get() = alarmCheckbox.isChecked
            set(value) { alarmCheckbox.isChecked = value }
        var alarmLow : Float?
            get() = alarmLowView.text.toString().toFloat()
            set(value) { if (value != null) alarmLowView.setText(value.toString()) }
        var alarmHigh : Float?
            get() = alarmHighView.text.toString().toFloat()
            set(value) { if (value != null) alarmHighView.setText(value.toString()) }
    }

    override fun getItemCount(): Int {
        return probes.size
    }

    override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int): TemperatureProbeCard? {
        val v = LayoutInflater.from(parent?.context)
                .inflate(R.layout.temperature_probe_card, parent, false)
        return TemperatureProbeCard(v as CardView)
    }

    override fun onBindViewHolder(card: TemperatureProbeCard?, position: Int) {
        val probe = probes[position]
        card!!.serialNumber = probe.serialNumber
        card.temperature = probe.temperature?.temperature
        card.alarmEnabled = probe.alarm != null
        card.alarmLow = probe.alarm?.lowerLimit
        card.alarmHigh = probe.alarm?.upperLimit
    }

    fun save(card: TemperatureProbeCard) {
        if (card.alarmEnabled) {
            val alarm = FarmnetTemperatureProbeService.TemperatureAlarm(card.alarmHigh!!,
                    card.alarmLow!!)
            temperatureProbeService.createAlarm(card.serialNumber, alarm)
                    .subscribeOn(Schedulers.newThread())
                    .observeOn(AndroidSchedulers.mainThread())
                    .subscribe({}, {
                        if (it is HttpException && it.code() == 409) {
                            // There was an alarm already, so PUT instead of POST
                            temperatureProbeService.updateAlarm(card.serialNumber, alarm)
                                    .subscribeOn(Schedulers.newThread())
                                    .observeOn(AndroidSchedulers.mainThread())
                                    .subscribe({}, { showErrorSavingSnackbar() },
                                            { showSavedSnackbar() })
                        } else if (it is UnknownHostException) {
                            showErrorNoInternet()
                        } else {
                            showErrorSavingSnackbar()
                        }
                    }, { showSavedSnackbar() })
        } else {
            temperatureProbeService.deleteAlarm(card.serialNumber)
                    .subscribeOn(Schedulers.newThread())
                    .observeOn(AndroidSchedulers.mainThread())
                    .subscribe({}, {
                        if (it is HttpException && it.code() == 404)
                            showSavedSnackbar()
                        else
                            showErrorSavingSnackbar()
                    }, { showSavedSnackbar() })
        }
    }

    fun showErrorNoInternet() {
        Snackbar.make(activity.findViewById(android.R.id.content)!!,
                activity.getString(R.string.error_no_internet), Snackbar.LENGTH_LONG).show()
    }

    fun showErrorSavingSnackbar() {
        Snackbar.make(activity.findViewById(android.R.id.content)!!,
                activity.getString(R.string.error_saving), Snackbar.LENGTH_LONG).show()
    }

    fun showSavedSnackbar() {
        Snackbar.make(activity.findViewById(android.R.id.content)!!,
                activity.getString(R.string.saved), Snackbar.LENGTH_LONG).show()
    }

    class TemperatureProbe(val serialNumber: String,
                           val alarm: FarmnetTemperatureProbeService.TemperatureAlarm?,
                           val temperature: FarmnetTemperatureProbeService.TemperatureMeasurement?)
}