feat: warn user of stale exchange rates (#1284)

* feat: support detection of stale rates

* feat: add new Toast based on Compose

common/build.gradle

@@ -84,6 +84,7 @@ dependencies {
     implementation("androidx.compose.ui:ui")
     implementation("androidx.compose.ui:ui-tooling-preview")
     implementation("androidx.compose.material3:material3")
+    debugImplementation 'androidx.compose.ui:ui-tooling:1.0.0'
 
     implementation "com.github.bumptech.glide:glide:$glideVersion"
     ksp "com.github.bumptech.glide:compiler:$glideVersion"

common/src/main/java/org/dash/wallet/common/data/ExchangeRatesConfig.kt

@@ -0,0 +1,25 @@
+package org.dash.wallet.common.data
+
+import android.content.Context
+import androidx.datastore.preferences.core.booleanPreferencesKey
+import androidx.datastore.preferences.core.longPreferencesKey
+import org.dash.wallet.common.WalletDataProvider
+import javax.inject.Inject
+
+class ExchangeRatesConfig
+    @Inject
+    constructor(
+        context: Context,
+        walletDataProvider: WalletDataProvider
+    ) : BaseConfig(
+            context,
+            PREFERENCES_NAME,
+            walletDataProvider
+        ) {
+        companion object {
+            private const val PREFERENCES_NAME = "exchange_rates_config"
+            val EXCHANGE_RATES_RETRIEVAL_TIME = longPreferencesKey("exchange_rates_retrieval_time")
+            val EXCHANGE_RATES_RETRIEVAL_FAILURE = booleanPreferencesKey("exchange_rates_retrieval_error")
+            val EXCHANGE_RATES_PREVIOUS_RETRIEVAL_TIME = longPreferencesKey("exchange_rates_previous_retrieval_time")
+        }
+    }

common/src/main/java/org/dash/wallet/common/data/entity/ExchangeRate.kt

@@ -34,16 +34,25 @@ open class ExchangeRate : Parcelable {
     @PrimaryKey
     var currencyCode: String
     var rate: String? = null
+    @Ignore
+    var retrievalTime: Long = -1L
 
     @Ignore
     private var currencyName: String? = null
 
     @Ignore
     private var currency: Currency? = null
 
+    constructor(currencyCode: String, rate: String?, retrievalTime: Long) {
+        this.currencyCode = currencyCode
+        this.rate = rate
+        this.retrievalTime = retrievalTime
+    }
+
     constructor(currencyCode: String, rate: String?) {
         this.currencyCode = currencyCode
         this.rate = rate
+        this.retrievalTime = -1
     }
 
     protected constructor(input: Parcel) {
@@ -79,13 +88,16 @@ open class ExchangeRate : Parcelable {
             // If the currency is not a valid ISO 4217 code, then set the
             // currency name to be equal to the currency code
             // exchanges often have "invalid" currency codes like USDT and CNH
-            currencyName = if (currencyCode.length == 3) {
-                try {
-                    getCurrency().displayName
-                } catch (x: IllegalArgumentException) {
+            currencyName =
+                if (currencyCode.length == 3) {
+                    try {
+                        getCurrency().displayName
+                    } catch (x: IllegalArgumentException) {
+                        currencyCode
+                    }
+                } else {
                     currencyCode
                 }
-            } else currencyCode
             if (currencyCode.equals(currencyName!!, ignoreCase = true)) {
                 currencyName = CurrencyInfo.getOtherCurrencyName(currencyCode, context)
             }
@@ -97,7 +109,10 @@ open class ExchangeRate : Parcelable {
         return 0
     }
 
-    override fun writeToParcel(dest: Parcel, flags: Int) {
+    override fun writeToParcel(
+        dest: Parcel,
+        flags: Int
+    ) {
         dest.writeString(currencyCode)
         dest.writeString(rate)
         dest.writeString(currencyName)

common/src/main/java/org/dash/wallet/common/services/ExchangeRatesProvider.kt

@@ -25,4 +25,5 @@ interface ExchangeRatesProvider {
     fun observeExchangeRate(currencyCode: String): Flow<ExchangeRate?>
     suspend fun getExchangeRate(currencyCode: String): ExchangeRate?
     suspend fun cleanupObsoleteCurrencies()
+    fun observeStaleRates(currencyCode: String): Flow<RateRetrievalState>
 }

common/src/main/java/org/dash/wallet/common/services/RateRetrievalState.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2024 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.services
+
+data class RateRetrievalState(
+    val lastAttemptFailed: Boolean = false,
+    val staleRates: Boolean,
+    val volatile: Boolean
+) {
+    val isStale = lastAttemptFailed || staleRates || volatile
+}

common/src/main/java/org/dash/wallet/common/ui/components/ComposeHostFrameLayout.kt

@@ -0,0 +1,30 @@
+package org.dash.wallet.common.ui.components
+
+import android.content.Context
+import android.util.AttributeSet
+import android.widget.FrameLayout
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.ComposeView
+
+class ComposeHostFrameLayout
+    @JvmOverloads
+    constructor(
+        context: Context,
+        attrs: AttributeSet? = null,
+        defStyleAttr: Int = 0
+    ) : FrameLayout(context, attrs, defStyleAttr) {
+        private var composeView: ComposeView? = null
+
+        fun setContent(content: @Composable () -> Unit) {
+            if (composeView == null) {
+                composeView = ComposeView(context)
+                addView(composeView)
+            }
+            composeView?.setContent(content)
+        }
+
+        override fun removeAllViews() {
+            composeView = null
+            super.removeAllViews()
+        }
+    }

common/src/main/java/org/dash/wallet/common/ui/components/MyTheme.kt

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2024 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.components
+
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.Font
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.sp
+import org.dash.wallet.common.R
+
+object MyTheme {
+    val ToastBackground = Color(0xff191c1f).copy(alpha = 0.9f)
+
+    val Body2Regular = TextStyle(
+        fontSize = 14.sp,
+        lineHeight = 20.sp,
+        fontFamily = FontFamily.Default, // FontFamily(Font(R.font.inter)) // crashes,
+        fontWeight = FontWeight(400),
+        color = Color.White
+    )
+
+    val OverlineSemibold = TextStyle(
+        fontSize = 12.sp,
+        lineHeight = 16.sp,
+        fontFamily = FontFamily.Default, // FontFamily(Font(R.font.inter)) // crashes,
+        fontWeight = FontWeight(600),
+        color = Color.White,
+        textAlign = TextAlign.Center
+    )
+}

common/src/main/java/org/dash/wallet/common/ui/components/Toast.kt

@@ -0,0 +1,122 @@
+package org.dash.wallet.common.ui.components
+
+import androidx.annotation.DrawableRes
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.layout.wrapContentSize
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import org.dash.wallet.common.R
+
+enum class ToastDuration {
+    SHORT,
+    LONG,
+    INDEFINITE
+}
+
+enum class ToastImageResource(@DrawableRes val resourceId: Int) {
+    Information(R.drawable.ic_toast_info),
+    Warning(R.drawable.ic_toast_info_warning),
+    Copy(R.drawable.ic_toast_copy),
+    Error(R.drawable.ic_toast_error),
+    NoInternet(R.drawable.ic_toast_no_wifi)
+}
+
+@Composable
+fun Toast(
+    text: String,
+    actionText: String,
+    modifier: Modifier = Modifier,
+    imageResource: Int? = null,
+    onActionClick: () -> Unit
+) {
+    Box(
+        modifier =
+            modifier.fillMaxWidth()
+                .padding(horizontal = 5.dp, vertical = 5.dp)
+                .background(
+                    color = MyTheme.ToastBackground,
+                    shape = RoundedCornerShape(size = 10.dp)
+                )
+    ) {
+        Row(
+            modifier =
+                Modifier
+                    .fillMaxWidth()
+                    .wrapContentSize(Alignment.BottomCenter)
+                    .padding(start = 16.dp, top = 8.dp, end = 16.dp, bottom = 8.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Row(
+                modifier =
+                    Modifier
+                        .weight(1f),
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                if (imageResource != null) {
+                    Image(
+                        painter = painterResource(id = imageResource),
+                        contentDescription = null,
+                        modifier =
+                            Modifier
+                                .size(15.dp)
+                    )
+                }
+                Text(
+                    text = text,
+                    style = MyTheme.Body2Regular,
+                    maxLines = 2,
+                    overflow = TextOverflow.Ellipsis,
+                    modifier = Modifier.padding(start = 8.dp, end = 8.dp)
+                )
+            }
+            TextButton(
+                onClick = onActionClick,
+                modifier =
+                    Modifier
+                        .padding(start = 0.dp)
+                        .wrapContentSize()
+                        .padding(horizontal = 0.dp, vertical = 0.dp),
+                contentPadding = PaddingValues(0.dp)
+            ) {
+                Text(
+                    text = actionText,
+                    style = MyTheme.OverlineSemibold,
+                    textAlign = TextAlign.End
+                )
+            }
+        }
+    }
+}
+
+@Preview
+@Composable
+private fun ToastPreview() {
+    Box(Modifier.width(400.dp).height(100.dp).background(Color.White)) {
+        Toast(
+            text = "The exchange rates are out of date, please do something about it right away",
+            actionText = "OK",
+            Modifier,
+            R.drawable.ic_image_placeholder
+        ) {
+        }
+    }
+}

common/src/main/res/drawable/ic_toast_copy.xml

@@ -0,0 +1,14 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="16dp"
+    android:height="16dp"
+    android:viewportWidth="16"
+    android:viewportHeight="16">
+  <path
+      android:pathData="M5.106,7.27C5.106,6.075 6.075,5.105 7.271,5.105H13.835C15.031,5.105 16,6.075 16,7.27V13.835C16,15.031 15.031,16 13.835,16H7.271C6.075,16 5.106,15.031 5.106,13.835V7.27Z"
+      android:fillColor="#ffffff"
+      android:fillType="evenOdd"/>
+  <path
+      android:pathData="M6.801,3.601C5.034,3.601 3.601,5.034 3.601,6.802C3.601,8.241 3.601,9.536 3.601,10.188C3.601,10.578 3.285,10.895 2.895,10.895H2.165C1.591,10.895 1.04,10.667 0.634,10.261C0.228,9.855 0,9.304 0,8.73V2.165C0,1.591 0.228,1.04 0.634,0.634C1.04,0.228 1.591,0 2.165,0H8.73C9.304,0 9.855,0.228 10.261,0.634C10.667,1.04 10.895,1.591 10.895,2.165V2.895C10.895,3.285 10.578,3.601 10.188,3.601C9.17,3.601 7.955,3.601 6.801,3.601Z"
+      android:fillColor="#ffffff"
+      android:fillType="evenOdd"/>
+</vector>

common/src/main/res/drawable/ic_toast_error.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="15dp"
+    android:height="15dp"
+    android:viewportWidth="15"
+    android:viewportHeight="15">
+  <path
+      android:pathData="m7.496,14.996c-1.026,0 -1.991,-0.196 -2.895,-0.588C3.696,14.021 2.898,13.482 2.206,12.79 1.519,12.098 0.98,11.3 0.588,10.396 0.196,9.491 0,8.526 0,7.5 0,6.474 0.196,5.509 0.588,4.605 0.98,3.7 1.519,2.904 2.206,2.217 2.898,1.525 3.694,0.983 4.594,0.591 5.498,0.2 6.463,0.004 7.489,0.004c1.03,0 1.998,0.196 2.903,0.588 0.905,0.392 1.703,0.934 2.395,1.626 0.692,0.687 1.234,1.483 1.626,2.388C14.804,5.509 15,6.474 15,7.5c0,1.026 -0.196,1.991 -0.588,2.896 -0.392,0.905 -0.934,1.703 -1.626,2.395 -0.692,0.692 -1.49,1.231 -2.395,1.618 -0.905,0.392 -1.87,0.588 -2.896,0.588zM5.116,10.57c0.198,0 0.368,-0.065 0.508,-0.196L7.504,8.48 9.39,10.374c0.131,0.131 0.295,0.196 0.493,0.196 0.194,0 0.356,-0.065 0.486,-0.196 0.135,-0.135 0.203,-0.298 0.203,-0.486 0,-0.198 -0.068,-0.36 -0.203,-0.486L8.476,7.507 10.377,5.613c0.136,-0.14 0.203,-0.302 0.203,-0.486 0,-0.189 -0.068,-0.348 -0.203,-0.479 -0.131,-0.135 -0.29,-0.203 -0.479,-0.203 -0.189,0 -0.351,0.068 -0.486,0.203L7.504,6.542 5.602,4.648C5.467,4.522 5.305,4.459 5.116,4.459c-0.189,0 -0.351,0.065 -0.486,0.196 -0.131,0.126 -0.196,0.288 -0.196,0.486 0,0.179 0.068,0.339 0.203,0.479L6.531,7.507 4.637,9.409C4.502,9.539 4.434,9.699 4.434,9.888c0,0.189 0.065,0.351 0.196,0.486 0.135,0.131 0.298,0.196 0.486,0.196z"
+      android:strokeWidth="0.990805"
+      android:fillColor="#ffffff"/>
+</vector>

common/src/main/res/drawable/ic_toast_info.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="15dp"
+    android:height="15dp"
+    android:viewportWidth="15"
+    android:viewportHeight="15">
+  <path
+      android:pathData="M7.496,15C6.471,15 5.506,14.804 4.601,14.412 3.696,14.025 2.898,13.485 2.206,12.793 1.519,12.101 0.98,11.302 0.588,10.397 0.196,9.492 0,8.526 0,7.5 0,6.474 0.196,5.508 0.588,4.603 0.98,3.698 1.519,2.902 2.206,2.214 2.898,1.522 3.694,0.98 4.594,0.588 5.498,0.196 6.463,0 7.489,0c1.03,0 1.998,0.196 2.903,0.588 0.905,0.392 1.703,0.934 2.395,1.626 0.692,0.687 1.234,1.484 1.626,2.389C14.804,5.508 15,6.474 15,7.5c0,1.026 -0.196,1.992 -0.588,2.897 -0.392,0.905 -0.934,1.704 -1.626,2.396 -0.692,0.692 -1.49,1.232 -2.395,1.619C9.487,14.804 8.522,15 7.496,15ZM6.168,11.675h3.055c0.174,0 0.319,-0.053 0.435,-0.16 0.116,-0.111 0.174,-0.254 0.174,-0.428 0,-0.164 -0.058,-0.303 -0.174,-0.414C9.543,10.557 9.398,10.498 9.224,10.498H8.389V6.941C8.389,6.713 8.333,6.53 8.222,6.389 8.111,6.249 7.949,6.179 7.736,6.179H6.299c-0.169,0 -0.312,0.058 -0.428,0.174 -0.116,0.116 -0.174,0.254 -0.174,0.414 0,0.174 0.058,0.317 0.174,0.428 0.116,0.106 0.259,0.16 0.428,0.16h0.762v3.144h-0.893c-0.169,0 -0.314,0.058 -0.435,0.174 -0.116,0.111 -0.174,0.249 -0.174,0.414 0,0.174 0.058,0.317 0.174,0.428 0.121,0.106 0.266,0.16 0.435,0.16zM7.453,5.01c0.29,0 0.535,-0.102 0.733,-0.305C8.384,4.501 8.483,4.259 8.483,3.979 8.483,3.683 8.384,3.437 8.186,3.238 7.987,3.035 7.743,2.933 7.453,2.933 7.167,2.933 6.923,3.035 6.72,3.238 6.517,3.437 6.415,3.683 6.415,3.979c0,0.281 0.102,0.523 0.305,0.726 0.203,0.203 0.448,0.305 0.733,0.305z"
+      android:fillColor="#ffffff"
+      android:fillAlpha="0.9"/>
+</vector>

common/src/main/res/drawable/ic_toast_info_warning.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="15dp"
+    android:height="15dp"
+    android:viewportWidth="15"
+    android:viewportHeight="15">
+  <path
+      android:pathData="m2.015,14.308c-0.412,0 -0.769,-0.09 -1.071,-0.27C0.641,13.859 0.407,13.618 0.241,13.315 0.08,13.012 0,12.676 0,12.307c0,-0.36 0.095,-0.702 0.284,-1.029L5.776,1.706C5.96,1.371 6.209,1.118 6.521,0.947 6.833,0.777 7.159,0.692 7.5,0.692c0.341,0 0.665,0.085 0.972,0.255 0.307,0.166 0.558,0.419 0.752,0.759L14.716,11.278c0.095,0.161 0.166,0.329 0.213,0.504 0.047,0.175 0.071,0.35 0.071,0.525 0,0.369 -0.083,0.705 -0.248,1.008 -0.166,0.303 -0.4,0.544 -0.702,0.724 -0.298,0.18 -0.653,0.27 -1.064,0.27zM7.507,9.448c0.421,0 0.636,-0.22 0.646,-0.66L8.266,5.226C8.276,5.008 8.207,4.831 8.061,4.694 7.914,4.552 7.727,4.481 7.5,4.481c-0.232,0 -0.419,0.071 -0.561,0.213C6.798,4.831 6.731,5.006 6.741,5.219l0.099,3.576c0.014,0.435 0.237,0.653 0.667,0.653zM7.507,11.889c0.237,0 0.44,-0.076 0.61,-0.227 0.17,-0.151 0.255,-0.345 0.255,-0.582 0,-0.232 -0.085,-0.426 -0.255,-0.582 -0.17,-0.156 -0.374,-0.234 -0.61,-0.234 -0.241,0 -0.447,0.078 -0.617,0.234 -0.17,0.156 -0.255,0.35 -0.255,0.582 0,0.237 0.085,0.43 0.255,0.582 0.175,0.151 0.381,0.227 0.617,0.227z"
+      android:strokeWidth="0.967745"
+      android:fillColor="#ffffff"/>
+</vector>

common/src/main/res/drawable/ic_toast_no_wifi.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="17dp"
+    android:height="14dp"
+    android:viewportWidth="17"
+    android:viewportHeight="14">
+  <path
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