From 56cf02a72850196547205725e3c7c6f4b154e436 Mon Sep 17 00:00:00 2001
From: Ianick Noejovich <iakanoe1056@gmail.com>
Date: Thu, 2 Nov 2023 16:44:34 -0300
Subject: [PATCH] add widget and fix some stuff

---
 .idea/inspectionProfiles/Project_Default.xml  |   9 +
 app/build.gradle.kts                          |   5 +-
 app/src/main/AndroidManifest.xml              |  13 +-
 .../github/dolarcito/di/RepositoryModule.kt   |   7 +-
 .../github/dolarcito/di/UseCaseModule.kt      |   8 +-
 .../domain/GetOrderedExchangeRatesUseCase.kt  |  19 +-
 .../github/dolarcito/ui/common/Compose.kt     |  28 +++
 .../github/dolarcito/ui/common/theme/Theme.kt |  13 ++
 .../dolarcito/ui/rates/ExchangeRatesScreen.kt |  30 ++-
 .../ui/rates/ExchangeRatesViewModel.kt        |  50 +++--
 .../ui/settings/SettingsViewModel.kt          |   2 -
 .../dolarcito/widget/ExchangeRatesWidget.kt   | 173 ++++++++++++++++++
 .../widget/ExchangeRatesWidgetEntryPoint.kt   |  12 ++
 .../widget/ExchangeRatesWidgetReceiver.kt     |   7 +
 app/src/main/res/values/themes.xml            |   2 +-
 .../res/xml/exchange_rates_widget_info.xml    |   6 +
 16 files changed, 312 insertions(+), 72 deletions(-)
 create mode 100644 app/src/main/java/io/iakanoe/github/dolarcito/ui/common/Compose.kt
 create mode 100644 app/src/main/java/io/iakanoe/github/dolarcito/widget/ExchangeRatesWidget.kt
 create mode 100644 app/src/main/java/io/iakanoe/github/dolarcito/widget/ExchangeRatesWidgetEntryPoint.kt
 create mode 100644 app/src/main/java/io/iakanoe/github/dolarcito/widget/ExchangeRatesWidgetReceiver.kt
 create mode 100644 app/src/main/res/xml/exchange_rates_widget_info.xml

diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
index 103e00c..44ca2d9 100644
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -3,30 +3,39 @@
     <option name="myName" value="Project Default" />
     <inspection_tool class="PreviewAnnotationInFunctionWithParameters" enabled="true" level="ERROR" enabled_by_default="true">
       <option name="composableFile" value="true" />
+      <option name="previewFile" value="true" />
     </inspection_tool>
     <inspection_tool class="PreviewApiLevelMustBeValid" enabled="true" level="ERROR" enabled_by_default="true">
       <option name="composableFile" value="true" />
+      <option name="previewFile" value="true" />
     </inspection_tool>
     <inspection_tool class="PreviewDimensionRespectsLimit" enabled="true" level="WARNING" enabled_by_default="true">
       <option name="composableFile" value="true" />
+      <option name="previewFile" value="true" />
     </inspection_tool>
     <inspection_tool class="PreviewFontScaleMustBeGreaterThanZero" enabled="true" level="ERROR" enabled_by_default="true">
       <option name="composableFile" value="true" />
+      <option name="previewFile" value="true" />
     </inspection_tool>
     <inspection_tool class="PreviewMultipleParameterProviders" enabled="true" level="ERROR" enabled_by_default="true">
       <option name="composableFile" value="true" />
+      <option name="previewFile" value="true" />
     </inspection_tool>
     <inspection_tool class="PreviewMustBeTopLevelFunction" enabled="true" level="ERROR" enabled_by_default="true">
       <option name="composableFile" value="true" />
+      <option name="previewFile" value="true" />
     </inspection_tool>
     <inspection_tool class="PreviewNeedsComposableAnnotation" enabled="true" level="ERROR" enabled_by_default="true">
       <option name="composableFile" value="true" />
+      <option name="previewFile" value="true" />
     </inspection_tool>
     <inspection_tool class="PreviewNotSupportedInUnitTestFiles" enabled="true" level="ERROR" enabled_by_default="true">
       <option name="composableFile" value="true" />
+      <option name="previewFile" value="true" />
     </inspection_tool>
     <inspection_tool class="PreviewPickerAnnotation" enabled="true" level="ERROR" enabled_by_default="true">
       <option name="composableFile" value="true" />
+      <option name="previewFile" value="true" />
     </inspection_tool>
   </profile>
 </component>
\ No newline at end of file
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 6979d72..8ee51a5 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -66,7 +66,7 @@ dependencies {
     implementation("com.google.dagger:hilt-android:2.48")
     kapt("com.google.dagger:hilt-android-compiler:2.48")
 
-    implementation("androidx.hilt:hilt-navigation-compose:1.1.0-rc01")
+    implementation("androidx.hilt:hilt-navigation-compose:1.1.0")
 
     implementation("com.squareup.retrofit2:retrofit:2.9.0")
     implementation("com.squareup.retrofit2:converter-gson:2.9.0")
@@ -85,4 +85,7 @@ dependencies {
     implementation("androidx.compose.material3:material3")
     debugImplementation("androidx.compose.ui:ui-tooling")
     debugImplementation("androidx.compose.ui:ui-test-manifest")
+
+    implementation("androidx.glance:glance-appwidget:1.0.0")
+    implementation("androidx.glance:glance-material3:1.0.0")
 }
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 6bb9abf..be824e8 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -15,6 +15,18 @@
         android:theme="@style/Theme.Dolarcito"
         tools:targetApi="31">
 
+        <receiver
+            android:name=".widget.ExchangeRatesWidgetReceiver"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/exchange_rates_widget_info" />
+        </receiver>
+
         <activity
             android:name=".MainActivity"
             android:exported="true"
@@ -25,7 +37,6 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/io/iakanoe/github/dolarcito/di/RepositoryModule.kt b/app/src/main/java/io/iakanoe/github/dolarcito/di/RepositoryModule.kt
index 3106e23..359d9ad 100644
--- a/app/src/main/java/io/iakanoe/github/dolarcito/di/RepositoryModule.kt
+++ b/app/src/main/java/io/iakanoe/github/dolarcito/di/RepositoryModule.kt
@@ -3,25 +3,22 @@ package io.iakanoe.github.dolarcito.di
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
-import dagger.hilt.android.components.ActivityRetainedComponent
-import dagger.hilt.android.scopes.ActivityRetainedScoped
+import dagger.hilt.components.SingletonComponent
 import io.iakanoe.github.dolarcito.data.ExchangeRateRepository
 import io.iakanoe.github.dolarcito.data.SettingsRepository
 import io.iakanoe.github.dolarcito.gateway.DolarcitoApiGateway
 import io.iakanoe.github.dolarcito.gateway.SettingsGateway
 
 @Module
-@InstallIn(ActivityRetainedComponent::class)
+@InstallIn(SingletonComponent::class)
 object RepositoryModule {
 
     @Provides
-    @ActivityRetainedScoped
     fun providesExchangeRateRepository(
         dolarcitoApiGateway: DolarcitoApiGateway
     ) = ExchangeRateRepository(dolarcitoApiGateway)
 
     @Provides
-    @ActivityRetainedScoped
     fun providesSettingsRepository(
         settingsGateway: SettingsGateway
     ) = SettingsRepository(settingsGateway)
diff --git a/app/src/main/java/io/iakanoe/github/dolarcito/di/UseCaseModule.kt b/app/src/main/java/io/iakanoe/github/dolarcito/di/UseCaseModule.kt
index 10b8adb..012d072 100644
--- a/app/src/main/java/io/iakanoe/github/dolarcito/di/UseCaseModule.kt
+++ b/app/src/main/java/io/iakanoe/github/dolarcito/di/UseCaseModule.kt
@@ -3,8 +3,7 @@ package io.iakanoe.github.dolarcito.di
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
-import dagger.hilt.android.components.ActivityRetainedComponent
-import dagger.hilt.android.scopes.ActivityRetainedScoped
+import dagger.hilt.components.SingletonComponent
 import io.iakanoe.github.dolarcito.data.ExchangeRateRepository
 import io.iakanoe.github.dolarcito.data.SettingsRepository
 import io.iakanoe.github.dolarcito.domain.GetOrderedExchangeRatesUseCase
@@ -12,11 +11,10 @@ import io.iakanoe.github.dolarcito.domain.GetSettingsUseCase
 import io.iakanoe.github.dolarcito.domain.SaveNewSettingsUseCase
 
 @Module
-@InstallIn(ActivityRetainedComponent::class)
+@InstallIn(SingletonComponent::class)
 object UseCaseModule {
 
     @Provides
-    @ActivityRetainedScoped
     fun provideGetOrderedExchangeRatesUseCase(
         settingsRepository: SettingsRepository,
         exchangeRateRepository: ExchangeRateRepository
@@ -26,13 +24,11 @@ object UseCaseModule {
     )
 
     @Provides
-    @ActivityRetainedScoped
     fun provideGetSettingsUseCase(
         settingsRepository: SettingsRepository
     ) = GetSettingsUseCase(settingsRepository)
 
     @Provides
-    @ActivityRetainedScoped
     fun provideSaveNewSettingsUseCase(
         settingsRepository: SettingsRepository
     ) = SaveNewSettingsUseCase(settingsRepository)
diff --git a/app/src/main/java/io/iakanoe/github/dolarcito/domain/GetOrderedExchangeRatesUseCase.kt b/app/src/main/java/io/iakanoe/github/dolarcito/domain/GetOrderedExchangeRatesUseCase.kt
index 355443d..99bb518 100644
--- a/app/src/main/java/io/iakanoe/github/dolarcito/domain/GetOrderedExchangeRatesUseCase.kt
+++ b/app/src/main/java/io/iakanoe/github/dolarcito/domain/GetOrderedExchangeRatesUseCase.kt
@@ -1,32 +1,30 @@
 package io.iakanoe.github.dolarcito.domain
 
-import android.util.Log
 import io.iakanoe.github.dolarcito.data.ExchangeRateRepository
 import io.iakanoe.github.dolarcito.data.SettingsRepository
 import io.iakanoe.github.dolarcito.model.ExchangeRate
 import io.iakanoe.github.dolarcito.model.ExchangeRateOrder
 import io.iakanoe.github.dolarcito.model.Settings
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.flow.onEach
 
 class GetOrderedExchangeRatesUseCase(
     private val settingsRepository: SettingsRepository,
     private val exchangeRateRepository: ExchangeRateRepository
 ) {
-    suspend fun execute(): Flow<ExchangeRateOrder> {
-        val existingRates = exchangeRateRepository.getExchangeRates()
+    fun execute(): Flow<ExchangeRateOrder> {
+        val existingRates = flow { emit(exchangeRateRepository.getExchangeRates()) }
 
         val actualSettings = settingsRepository.getSettings()
-            .map { settings ->
+            .combine(existingRates) { a, b -> a to b }
+            .map { (settings, existingRates) ->
                 val updated = settings.update(existingRates.map { it.name })
-
-                Log.d("UseCase", "map\nsettings=$settings\nupdated=$updated")
                 if (settings != updated) settingsRepository.setSettings(updated)
-                updated
+                updated to existingRates
             }
-            .onEach { Log.d("onEach", "ONEACH 1 $it") }
-            .map { settings ->
+            .map { (settings, existingRates) ->
                 ExchangeRateOrder(
                     showing = settings.showingRatesNames
                         .map { exchangeRateByName(existingRates, it) },
@@ -34,7 +32,6 @@ class GetOrderedExchangeRatesUseCase(
                         .map { exchangeRateByName(existingRates, it) }
                 )
             }
-            .onEach { Log.d("onEach", "ONEACH $it") }
 
         return actualSettings
     }
diff --git a/app/src/main/java/io/iakanoe/github/dolarcito/ui/common/Compose.kt b/app/src/main/java/io/iakanoe/github/dolarcito/ui/common/Compose.kt
new file mode 100644
index 0000000..f33adc9
--- /dev/null
+++ b/app/src/main/java/io/iakanoe/github/dolarcito/ui/common/Compose.kt
@@ -0,0 +1,28 @@
+package io.iakanoe.github.dolarcito.ui.common
+
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.flow
+import java.text.DecimalFormat
+import java.util.Calendar
+
+val Int.minutesText
+    get() = when (this) {
+        0 -> "hace menos de un minuto"
+        1 -> "hace un minuto"
+        else -> "hace $this minutos"
+    }
+
+val Float.priceText: String
+    get() = DecimalFormat("$#.##")
+        .format(this)
+
+val Long.largeNumberText: String
+    get() = DecimalFormat("#,###")
+        .format(this)
+
+val currentTime = flow {
+    while (true) {
+        delay(1000)
+        emit(Calendar.getInstance().timeInMillis)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/io/iakanoe/github/dolarcito/ui/common/theme/Theme.kt b/app/src/main/java/io/iakanoe/github/dolarcito/ui/common/theme/Theme.kt
index 0681228..80675be 100644
--- a/app/src/main/java/io/iakanoe/github/dolarcito/ui/common/theme/Theme.kt
+++ b/app/src/main/java/io/iakanoe/github/dolarcito/ui/common/theme/Theme.kt
@@ -14,6 +14,8 @@ import androidx.compose.ui.graphics.toArgb
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalView
 import androidx.core.view.WindowCompat
+import androidx.glance.GlanceTheme
+import androidx.glance.material3.ColorProviders
 
 private val dolarcitoDarkColorScheme = darkColorScheme(
     primary = Purple80,
@@ -57,4 +59,15 @@ fun DolarcitoTheme(
         typography = Typography,
         content = content
     )
+}
+
+@Composable
+fun DolarcitoGlanceTheme(content: @Composable () -> Unit) {
+    GlanceTheme(
+        colors = ColorProviders(
+            light = dolarcitoLightColorScheme,
+            dark = dolarcitoDarkColorScheme
+        ),
+        content = content
+    )
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/iakanoe/github/dolarcito/ui/rates/ExchangeRatesScreen.kt b/app/src/main/java/io/iakanoe/github/dolarcito/ui/rates/ExchangeRatesScreen.kt
index 4eafc4e..1557ddf 100644
--- a/app/src/main/java/io/iakanoe/github/dolarcito/ui/rates/ExchangeRatesScreen.kt
+++ b/app/src/main/java/io/iakanoe/github/dolarcito/ui/rates/ExchangeRatesScreen.kt
@@ -42,7 +42,10 @@ import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import io.iakanoe.github.dolarcito.model.ExchangeRate
 import io.iakanoe.github.dolarcito.ui.TopAppBarState
-import java.text.DecimalFormat
+import io.iakanoe.github.dolarcito.ui.common.currentTime
+import io.iakanoe.github.dolarcito.ui.common.largeNumberText
+import io.iakanoe.github.dolarcito.ui.common.minutesText
+import io.iakanoe.github.dolarcito.ui.common.priceText
 import java.time.Instant
 import java.time.LocalDateTime
 import java.time.ZoneId
@@ -51,21 +54,6 @@ import java.util.Calendar
 import kotlin.math.floor
 import kotlin.math.sign
 
-val Int.minutesText
-    get() = when (this) {
-        0 -> "hace menos de un minuto"
-        1 -> "hace un minuto"
-        else -> "hace $this minutos"
-    }
-
-val Float.priceText: String
-    get() = DecimalFormat("$#.##")
-        .format(this)
-
-val Long.largeNumberText: String
-    get() = DecimalFormat("#,###")
-        .format(this)
-
 @Composable
 fun ExchangeRatesScreen(
     onNavigateToSettings: () -> Unit,
@@ -74,13 +62,15 @@ fun ExchangeRatesScreen(
 ) {
     val viewState by viewModel.viewState.collectAsState()
 
+    val now by currentTime.collectAsState(initial = Calendar.getInstance().timeInMillis)
+
     val lastUpdated by remember {
         derivedStateOf {
             viewState.let {
                 if (it is ExchangeRatesViewState.Loaded) {
-                    val millis = Calendar.getInstance().timeInMillis - it.updatedTime
+                    val millis = now - it.updatedTime
                     val minutes = floor(millis / 60000f)
-                    minutes.toInt()
+                    minutes.toInt().coerceAtLeast(0)
                 } else null
             }
         }
@@ -197,9 +187,11 @@ fun ExchangeRateCard(exchangeRate: ExchangeRate) {
         else -> MaterialTheme.colorScheme.outline
     }
 
+    val now by currentTime.collectAsState(initial = Calendar.getInstance().timeInMillis)
+
     val lastUpdated by remember {
         derivedStateOf {
-            val millis = Calendar.getInstance().timeInMillis - exchangeRate.timestamp
+            val millis = now - exchangeRate.timestamp
             val minutes = floor(millis / 60000f)
             minutes.toInt()
         }
diff --git a/app/src/main/java/io/iakanoe/github/dolarcito/ui/rates/ExchangeRatesViewModel.kt b/app/src/main/java/io/iakanoe/github/dolarcito/ui/rates/ExchangeRatesViewModel.kt
index 4d7af57..37f9f3a 100644
--- a/app/src/main/java/io/iakanoe/github/dolarcito/ui/rates/ExchangeRatesViewModel.kt
+++ b/app/src/main/java/io/iakanoe/github/dolarcito/ui/rates/ExchangeRatesViewModel.kt
@@ -1,17 +1,19 @@
 package io.iakanoe.github.dolarcito.ui.rates
 
-import android.util.Log
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import io.iakanoe.github.dolarcito.domain.GetOrderedExchangeRatesUseCase
 import io.iakanoe.github.dolarcito.model.ExchangeRate
+import io.iakanoe.github.dolarcito.model.ExchangeRateOrder
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.asStateFlow
-import kotlinx.coroutines.flow.emptyFlow
-import kotlinx.coroutines.flow.firstOrNull
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onCompletion
+import kotlinx.coroutines.flow.onStart
 import kotlinx.coroutines.launch
 import java.util.Calendar
 import javax.inject.Inject
@@ -31,32 +33,28 @@ class ExchangeRatesViewModel @Inject constructor(
     }
 
     fun update() {
+        waitingJob?.cancel()
         viewModelScope.launch {
-            waitingJob?.cancel()
-            _viewState.value = ExchangeRatesViewState.Loading
-
-            val order = runCatching { getOrderedExchangeRatesUseCase.execute() }
-                .onFailure {
+            getOrderedExchangeRatesUseCase.execute()
+                .map<ExchangeRateOrder, ExchangeRatesViewState> {
+                    ExchangeRatesViewState.Loaded(
+                        exchangeRates = it.showing,
+                        hiddenExchangeRates = it.hidden,
+                        updatedTime = Calendar.getInstance().timeInMillis
+                    )
+                }
+                .onStart { emit(ExchangeRatesViewState.Loading) }
+                .catch {
                     it.printStackTrace()
-                    _viewState.value = ExchangeRatesViewState.Error
+                    emit(ExchangeRatesViewState.Error)
                 }
-                .getOrDefault(emptyFlow())
-                .firstOrNull()
-
-            order?.let {
-                Log.d("ExchangeRates", "loaded: \nshowing=${it.showing}\nhidden=${it.hidden}")
-
-                _viewState.value = ExchangeRatesViewState.Loaded(
-                    exchangeRates = it.showing,
-                    hiddenExchangeRates = it.hidden,
-                    updatedTime = Calendar.getInstance().timeInMillis
-                )
-            }
-
-            waitingJob = launch {
-                delay(5 * 60000L)
-                update()
-            }
+                .onCompletion {
+                    waitingJob = launch {
+                        delay(5 * 60000L)
+                        update()
+                    }
+                }
+                .collect { _viewState.emit(it) }
         }
     }
 }
diff --git a/app/src/main/java/io/iakanoe/github/dolarcito/ui/settings/SettingsViewModel.kt b/app/src/main/java/io/iakanoe/github/dolarcito/ui/settings/SettingsViewModel.kt
index d7cf5a3..807ff64 100644
--- a/app/src/main/java/io/iakanoe/github/dolarcito/ui/settings/SettingsViewModel.kt
+++ b/app/src/main/java/io/iakanoe/github/dolarcito/ui/settings/SettingsViewModel.kt
@@ -1,6 +1,5 @@
 package io.iakanoe.github.dolarcito.ui.settings
 
-import android.util.Log
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
@@ -36,7 +35,6 @@ class SettingsViewModel @Inject constructor(
         viewModelScope.launch {
             try {
                 val actualSettings = getSettingsUseCase.execute().first()
-                Log.d("getdata", "GET DATA $actualSettings")
                 _viewState.value = SettingsViewState.Loaded(
                     showingRates = actualSettings.showingRatesNames,
                     hiddenRates = actualSettings.hiddenRatesNames
diff --git a/app/src/main/java/io/iakanoe/github/dolarcito/widget/ExchangeRatesWidget.kt b/app/src/main/java/io/iakanoe/github/dolarcito/widget/ExchangeRatesWidget.kt
new file mode 100644
index 0000000..2d19947
--- /dev/null
+++ b/app/src/main/java/io/iakanoe/github/dolarcito/widget/ExchangeRatesWidget.kt
@@ -0,0 +1,173 @@
+package io.iakanoe.github.dolarcito.widget
+
+import android.content.Context
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.glance.GlanceId
+import androidx.glance.GlanceModifier
+import androidx.glance.GlanceTheme
+import androidx.glance.action.actionStartActivity
+import androidx.glance.action.clickable
+import androidx.glance.appwidget.CircularProgressIndicator
+import androidx.glance.appwidget.GlanceAppWidget
+import androidx.glance.appwidget.provideContent
+import androidx.glance.background
+import androidx.glance.layout.Box
+import androidx.glance.layout.Column
+import androidx.glance.layout.Row
+import androidx.glance.layout.Spacer
+import androidx.glance.layout.fillMaxSize
+import androidx.glance.layout.fillMaxWidth
+import androidx.glance.layout.padding
+import androidx.glance.layout.size
+import androidx.glance.text.FontWeight
+import androidx.glance.text.Text
+import androidx.glance.text.TextStyle
+import androidx.glance.unit.ColorProvider
+import dagger.hilt.android.EntryPointAccessors
+import io.iakanoe.github.dolarcito.MainActivity
+import io.iakanoe.github.dolarcito.model.ExchangeRate
+import io.iakanoe.github.dolarcito.model.ExchangeRateOrder
+import io.iakanoe.github.dolarcito.ui.common.priceText
+import io.iakanoe.github.dolarcito.ui.common.theme.DolarcitoGlanceTheme
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onStart
+import java.lang.Float.max
+
+class ExchangeRatesWidget : GlanceAppWidget() {
+
+    sealed class State {
+        data object Loading : State()
+        data object Error : State()
+        data class Loaded(val exchangeRateOrder: ExchangeRateOrder) : State()
+    }
+
+    private fun getExchangeRateOrder(context: Context): Flow<State> {
+        val appContext = context.applicationContext ?: error("No app context")
+        val entryPoint: ExchangeRatesWidgetEntryPoint = EntryPointAccessors.fromApplication(appContext)
+        val getOrderedExchangeRatesUseCase = entryPoint.getOrderedExchangeRatesUseCase()
+        return getOrderedExchangeRatesUseCase.execute()
+            .map<ExchangeRateOrder, State> { State.Loaded(it) }
+            .onStart { emit(State.Loading) }
+            .catch {
+                it.printStackTrace()
+                emit(State.Error)
+            }
+    }
+
+    override suspend fun provideGlance(context: Context, id: GlanceId) {
+        provideContent {
+            val viewState by getExchangeRateOrder(context).collectAsState(State.Loading)
+
+            DolarcitoGlanceTheme {
+                Content(viewState)
+            }
+        }
+    }
+}
+
+val largeTextStyle
+    @Composable get() = TextStyle(
+        color = GlanceTheme.colors.onSurface,
+        fontWeight = FontWeight.Medium,
+        fontSize = 18.sp
+    )
+
+val smallTextStyle
+    @Composable get() = TextStyle(
+        color = GlanceTheme.colors.onSurface,
+        fontWeight = FontWeight.Normal,
+        fontSize = 14.sp
+    )
+
+@Composable
+private fun Content(state: ExchangeRatesWidget.State) {
+    Box(
+        modifier = GlanceModifier
+            .fillMaxSize()
+            .background(GlanceTheme.colors.surface)
+            .clickable(actionStartActivity<MainActivity>())
+    ) {
+        when (state) {
+            is ExchangeRatesWidget.State.Loading -> LoadingContent()
+            is ExchangeRatesWidget.State.Error -> ErrorContent()
+            is ExchangeRatesWidget.State.Loaded -> LoadedContent(state)
+        }
+    }
+}
+
+@Composable
+fun LoadingContent() {
+    CircularProgressIndicator()
+}
+
+@Composable
+fun ErrorContent() {
+    Text(
+        text = "Ocurrió un error.",
+        style = largeTextStyle
+    )
+}
+
+@Composable
+private fun LoadedContent(state: ExchangeRatesWidget.State.Loaded) {
+    val list = state.exchangeRateOrder.showing.take(3)
+
+    Column(
+        modifier = GlanceModifier
+            .fillMaxSize()
+            .padding(8.dp)
+    ) {
+        for (item in list) {
+            ExchangeRateItem(
+                exchangeRate = item,
+                modifier = GlanceModifier.defaultWeight()
+            )
+        }
+    }
+}
+
+@Composable
+private fun ExchangeRateItem(
+    modifier: GlanceModifier = GlanceModifier,
+    exchangeRate: ExchangeRate,
+) {
+    val higherPrice = max(exchangeRate.buy ?: 0f, exchangeRate.sell ?: 0f)
+    val type = if (higherPrice == exchangeRate.buy) "c" else "v"
+    val color = (exchangeRate.variation ?: 0f).let {
+        when {
+            it < 0 -> ColorProvider(Color.Red)
+            it > 0 -> ColorProvider(Color.Green)
+            else -> GlanceTheme.colors.onSurface
+        }
+    }
+
+    Row(modifier = modifier.fillMaxWidth()) {
+        Text(
+            text = exchangeRate.name.removePrefix("dolar ").uppercase(),
+            style = largeTextStyle,
+            modifier = GlanceModifier.defaultWeight(),
+            maxLines = 1
+        )
+
+        Spacer(modifier = GlanceModifier.size(8.dp))
+
+        Text(
+            text = type,
+            style = smallTextStyle
+        )
+
+        Spacer(modifier = GlanceModifier.size(4.dp))
+
+        Text(
+            text = higherPrice.priceText,
+            style = largeTextStyle.copy(color = color)
+        )
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/io/iakanoe/github/dolarcito/widget/ExchangeRatesWidgetEntryPoint.kt b/app/src/main/java/io/iakanoe/github/dolarcito/widget/ExchangeRatesWidgetEntryPoint.kt
new file mode 100644
index 0000000..6291225
--- /dev/null
+++ b/app/src/main/java/io/iakanoe/github/dolarcito/widget/ExchangeRatesWidgetEntryPoint.kt
@@ -0,0 +1,12 @@
+package io.iakanoe.github.dolarcito.widget
+
+import dagger.hilt.EntryPoint
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import io.iakanoe.github.dolarcito.domain.GetOrderedExchangeRatesUseCase
+
+@EntryPoint
+@InstallIn(SingletonComponent::class)
+interface ExchangeRatesWidgetEntryPoint {
+    fun getOrderedExchangeRatesUseCase(): GetOrderedExchangeRatesUseCase
+}
\ No newline at end of file
diff --git a/app/src/main/java/io/iakanoe/github/dolarcito/widget/ExchangeRatesWidgetReceiver.kt b/app/src/main/java/io/iakanoe/github/dolarcito/widget/ExchangeRatesWidgetReceiver.kt
new file mode 100644
index 0000000..e6048d6
--- /dev/null
+++ b/app/src/main/java/io/iakanoe/github/dolarcito/widget/ExchangeRatesWidgetReceiver.kt
@@ -0,0 +1,7 @@
+package io.iakanoe.github.dolarcito.widget
+
+import androidx.glance.appwidget.GlanceAppWidgetReceiver
+
+class ExchangeRatesWidgetReceiver : GlanceAppWidgetReceiver() {
+    override val glanceAppWidget = ExchangeRatesWidget()
+}
\ No newline at end of file
diff --git a/app/src/main/res/values/themes.xml b/app/src/main/res/values/themes.xml
index 16afe96..83bc8dd 100644
--- a/app/src/main/res/values/themes.xml
+++ b/app/src/main/res/values/themes.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-    <style name="Theme.Dolarcito" parent="android:Theme.Material.Light.NoActionBar" />
+    <style name="Theme.Dolarcito" parent="android:Theme.Material.NoActionBar" />
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/xml/exchange_rates_widget_info.xml b/app/src/main/res/xml/exchange_rates_widget_info.xml
new file mode 100644
index 0000000..f026f4f
--- /dev/null
+++ b/app/src/main/res/xml/exchange_rates_widget_info.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+    android:initialLayout="@layout/glance_default_loading_layout"
+    android:minWidth="150dp"
+    android:minHeight="20dp"
+    android:updatePeriodMillis="300000" />
\ No newline at end of file