feat(maya): add currency picker with local currency prices

common/src/main/java/org/dash/wallet/common/ui/radio_group/RadioGroupAdapter.kt

@@ -83,7 +83,7 @@ class RadioGroupAdapter(
     }
 }
 
-class RadioButtonViewHolder(
+open class RadioButtonViewHolder(
     val binding: RadiobuttonRowBinding,
     private val isCheckMark: Boolean
 ) : RecyclerView.ViewHolder(binding.root) {

common/src/main/java/org/dash/wallet/common/ui/recyclerview/IconifiedListAdapter.kt

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2021 Dash Core Group.
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.dash.wallet.common.ui.recyclerview
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.ListAdapter
+import org.dash.wallet.common.R
+import org.dash.wallet.common.databinding.RadiobuttonRowBinding
+import org.dash.wallet.common.ui.radio_group.IconifiedViewItem
+import org.dash.wallet.common.ui.radio_group.RadioButtonViewHolder
+import org.dash.wallet.common.ui.radio_group.RadioGroupAdapter
+import org.dash.wallet.common.ui.setRoundedRippleBackground
+
+class IconifiedListAdapter(
+    private val clickListener: (IconifiedViewItem, Int) -> Unit
+): ListAdapter<IconifiedViewItem, IconifiedViewHolder>(RadioGroupAdapter.DiffCallback()) {
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): IconifiedViewHolder {
+        val inflater = LayoutInflater.from(parent.context)
+        val binding = RadiobuttonRowBinding.inflate(inflater, parent, false)
+
+        return IconifiedViewHolder(binding)
+    }
+
+    override fun onBindViewHolder(holder: IconifiedViewHolder, position: Int) {
+        holder.itemView.isSelected = false
+        val item = getItem(position)
+        holder.bind(item)
+
+        holder.binding.root.setOnClickListener {
+            clickListener.invoke(item, position)
+        }
+    }
+}
+
+class IconifiedViewHolder(
+    binding: RadiobuttonRowBinding
+) : RadioButtonViewHolder(binding, false) {
+    fun bind(option: IconifiedViewItem) {
+        super.bind(option, false)
+        binding.checkmarkFrame.isVisible = false
+        itemView.setRoundedRippleBackground(R.style.ListViewButtonBackground)
+    }
+}

common/src/main/res/layout/iconifieditem_row.xml

@@ -0,0 +1,103 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright 2021 Dash Core Group.
+  ~
+  ~ This program 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 of the License, or
+  ~ (at your option) any later version.
+  ~
+  ~ This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:minHeight="46dp"
+    android:paddingHorizontal="15dp"
+    android:paddingVertical="12dp"
+    tools:context=".ui.radio_group.RadioGroupAdapter">
+
+    <FrameLayout
+        android:id="@+id/icon_wrapper"
+        android:layout_width="30dp"
+        android:layout_height="30dp"
+        android:background="@drawable/rounded_background"
+        android:theme="@style/EncircledIconTheme"
+        android:layout_marginEnd="12dp"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toStartOf="@id/title">
+
+        <ImageView
+            android:id="@+id/icon"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            tools:src="@drawable/ic_chevron" />
+    </FrameLayout>
+
+    <TextView
+        android:id="@+id/title"
+        style="@style/Body2.Medium"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:textColor="@color/radiobutton_text_color"
+        android:layout_marginEnd="12dp"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toTopOf="@id/subtitle"
+        app:layout_constraintStart_toEndOf="@id/icon_wrapper"
+        app:layout_constraintEnd_toStartOf="@id/additional_info"
+        tools:text="Alabama" />
+
+    <TextView
+        android:id="@+id/subtitle"
+        style="@style/Caption.Secondary"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="2dp"
+        android:drawablePadding="4dp"
+        android:layout_marginEnd="12dp"
+        app:layout_constraintStart_toStartOf="@id/title"
+        app:layout_constraintTop_toBottomOf="@id/title"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toStartOf="@id/additional_info"
+        tools:text="****1234" />
+
+    <TextView
+        android:id="@+id/additional_info"
+        style="@style/Body2.Secondary"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="12dp"
+        android:visibility="gone"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintBottom_toTopOf="@id/additional_info_subtitle"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:visibility="visible"
+        tools:text="USD" />
+
+    <TextView
+        android:id="@+id/additional_info_subtitle"
+        style="@style/Caption.Secondary"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="2dp"
+        android:drawablePadding="4dp"
+        android:layout_marginEnd="12dp"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        tools:visibility="visible"
+        app:layout_constraintTop_toBottomOf="@id/additional_info"
+        app:layout_constraintEnd_toEndOf="parent"
+        tools:text="****1234" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

integrations/maya/src/main/java/org/dash/wallet/integrations/maya/api/ApiStatuses.kt

@@ -0,0 +1,7 @@
+package org.dash.wallet.integrations.maya.api
+
+open class MayaException(message: String): Exception(message) {
+    companion object {
+        const val SWAP_ERROR = "deposit_error"
+    }
+}

integrations/maya/src/main/java/org/dash/wallet/integrations/maya/api/ExchangeRateApi.kt

@@ -0,0 +1,11 @@
+package org.dash.wallet.integrations.maya.api
+
+import org.dash.wallet.integrations.maya.model.ExchangeRateResponse
+import retrofit2.Response
+import retrofit2.http.GET
+import retrofit2.http.Query
+
+interface ExchangeRateApi {
+    @GET("latest")
+    suspend fun getRates(@Query("base") baseCurrencyCode: String): Response<ExchangeRateResponse>
+}

integrations/maya/src/main/java/org/dash/wallet/integrations/maya/api/FiatExchangeRateApi.kt

@@ -0,0 +1,85 @@
+package org.dash.wallet.integrations.maya.api
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.asCoroutineDispatcher
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.launch
+import org.dash.wallet.common.data.entity.ExchangeRate
+import org.dash.wallet.integrations.maya.utils.MayaConstants
+import org.slf4j.Logger
+import org.slf4j.LoggerFactory
+import java.util.concurrent.Executors
+import java.util.concurrent.TimeUnit
+import javax.inject.Inject
+
+class FiatExchangeRateApiAggregator @Inject constructor(
+    val exchangeRateApi: ExchangeRateApi
+) {
+    companion object {
+        val log: Logger = LoggerFactory.getLogger(FiatExchangeRateApiAggregator::class.java)
+    }
+    suspend fun getRate(currencyCode: String): ExchangeRate? {
+        val response = exchangeRateApi.getRates(MayaConstants.DEFAULT_EXCHANGE_CURRENCY).body()
+        val exchangeRate = response?.rates?.get(currencyCode) ?: 0.0
+        log.info("exchange rate: {} {}", exchangeRate, currencyCode)
+        return if (exchangeRate != 0.0) {
+            ExchangeRate(currencyCode, exchangeRate.toString())
+        } else {
+            null
+        }
+    }
+}
+
+interface FiatExchangeRateProvider {
+    val fiatExchangeRate: Flow<ExchangeRate>
+    fun observeFiatRates(): Flow<List<ExchangeRate>>
+    fun observeFiatRate(currencyCode: String): Flow<ExchangeRate?>
+}
+
+class FiatExchangeRateAggregatedProvider @Inject constructor(
+    val fiatExchangeRateApi: FiatExchangeRateApiAggregator
+) : FiatExchangeRateProvider {
+    companion object {
+        private val log = LoggerFactory.getLogger(FiatExchangeRateApiAggregator::class.java)
+        private val UPDATE_FREQ_MS = TimeUnit.SECONDS.toMillis(30)
+    }
+
+    private val responseScope = CoroutineScope(
+        Executors.newSingleThreadExecutor().asCoroutineDispatcher()
+    )
+    private var poolListLastUpdated: Long = 0
+    override val fiatExchangeRate = MutableStateFlow(ExchangeRate(MayaConstants.DEFAULT_EXCHANGE_CURRENCY, "1.0"))
+    override fun observeFiatRates(): Flow<List<ExchangeRate>> {
+        TODO("Not yet implemented")
+    }
+
+    override fun observeFiatRate(currencyCode: String): Flow<ExchangeRate?> {
+        if (shouldRefresh()) {
+            refreshRates(currencyCode)
+        }
+        return fiatExchangeRate
+    }
+
+    private fun refreshRates(currencyCode: String) {
+        if (!shouldRefresh()) {
+            return
+        }
+
+        responseScope.launch {
+            updateExchangeRates(currencyCode)
+            poolListLastUpdated = System.currentTimeMillis()
+        }
+    }
+
+    private fun shouldRefresh(): Boolean {
+        val now = System.currentTimeMillis()
+        return poolListLastUpdated == 0L || now - poolListLastUpdated > UPDATE_FREQ_MS
+    }
+
+    suspend fun updateExchangeRates(currencyCode: String) {
+        fiatExchangeRateApi.getRate(currencyCode)?.let { rate ->
+            fiatExchangeRate.value = rate
+        }
+    }
+}