Finish exercise 13

E13RoomShoppingList/.gitignore

+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

E13RoomShoppingList/.idea/.name

+E13 Room Shopping List
\ No newline at end of file

E13RoomShoppingList/.idea/compiler.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="17" />
+  </component>
+</project>
\ No newline at end of file

E13RoomShoppingList/.idea/deploymentTargetDropDown.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="deploymentTargetDropDown">
+    <value>
+      <entry key="app">
+        <State />
+      </entry>
+    </value>
+  </component>
+</project>
\ No newline at end of file

E13RoomShoppingList/.idea/gradle.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="#GRADLE_LOCAL_JAVA_HOME" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveExternalAnnotations" value="false" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>
\ No newline at end of file

E13RoomShoppingList/.idea/kotlinc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="KotlinJpsPluginSettings">
+    <option name="version" value="1.9.0" />
+  </component>
+</project>
\ No newline at end of file

E13RoomShoppingList/.idea/migrations.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectMigrations">
+    <option name="MigrateToGradleLocalJavaHome">
+      <set>
+        <option value="$PROJECT_DIR$" />
+      </set>
+    </option>
+  </component>
+</project>
\ No newline at end of file

E13RoomShoppingList/.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="jbr-17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>
\ No newline at end of file

E13RoomShoppingList/.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

E13RoomShoppingList/app/.gitignore

+/build
\ No newline at end of file

E13RoomShoppingList/app/build.gradle.kts

+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+    id("com.google.devtools.ksp") version "1.9.22-1.0.16"
+}
+
+android {
+    namespace = "com.example.e13roomshoppinglist"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "com.example.e13roomshoppinglist"
+        minSdk = 31
+        targetSdk = 34
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables {
+            useSupportLibrary = true
+        }
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+    buildFeatures {
+        compose = true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion = "1.5.1"
+    }
+    packaging {
+        resources {
+            excludes += "/META-INF/{AL2.0,LGPL2.1}"
+        }
+    }
+}
+
+dependencies {
+
+    implementation("androidx.core:core-ktx:1.12.0")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.6.2")
+    implementation("androidx.activity:activity-compose:1.8.2")
+    implementation(platform("androidx.compose:compose-bom:2023.08.00"))
+    implementation("androidx.compose.ui:ui")
+    implementation("androidx.compose.ui:ui-graphics")
+    implementation("androidx.compose.ui:ui-tooling-preview")
+    implementation("androidx.compose.material3:material3")
+    testImplementation("junit:junit:4.13.2")
+    androidTestImplementation("androidx.test.ext:junit:1.1.5")
+    androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
+    androidTestImplementation(platform("androidx.compose:compose-bom:2023.08.00"))
+    androidTestImplementation("androidx.compose.ui:ui-test-junit4")
+    debugImplementation("androidx.compose.ui:ui-tooling")
+    debugImplementation("androidx.compose.ui:ui-test-manifest")
+
+    // Room
+    val roomVersion = "2.6.1"
+    implementation("androidx.room:room-ktx:$roomVersion")
+    ksp("androidx.room:room-compiler:$roomVersion")
+
+    // Material compose 3
+    implementation("androidx.compose.material3:material3:1.1.2")
+    implementation("androidx.compose.material3:material3-window-size-class:1.1.2")
+}
\ No newline at end of file

E13RoomShoppingList/app/proguard-rules.pro

+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file

E13RoomShoppingList/app/src/androidTest/java/com/example/e13roomshoppinglist/ExampleInstrumentedTest.kt

+package com.example.e13roomshoppinglist
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.example.e13roomshoppinglist", appContext.packageName)
+    }
+}
\ No newline at end of file

E13RoomShoppingList/app/src/main/AndroidManifest.xml

+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.E13RoomShoppingList"
+        tools:targetApi="31">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.E13RoomShoppingList">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
\ No newline at end of file

E13RoomShoppingList/app/src/main/java/com/example/e13roomshoppinglist/MainActivity.kt

+package com.example.e13roomshoppinglist
+
+import android.os.Bundle
+import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.viewModels
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.room.Room
+import com.example.e13roomshoppinglist.ui.theme.E13RoomShoppingListTheme
+
+class MainActivity : ComponentActivity() {
+    private val db by lazy {
+        Room.databaseBuilder(
+            applicationContext,
+            ShoppingListDatabase::class.java,
+            "shoppingListDB.db"
+        ).build()
+    }
+    private val viewModel by viewModels<ShoppingListViewModel> {
+        object : ViewModelProvider.Factory {
+            override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                return ShoppingListViewModel(db.dao) as T
+            }
+        }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            E13RoomShoppingListTheme {
+                val state by viewModel.state.collectAsState()
+                val ctx = LocalContext.current
+                var toast by remember {
+                    mutableStateOf<Toast?>(Toast.makeText(ctx, "Loaded data from room db!", Toast.LENGTH_SHORT))
+                }
+
+                val showToast = { msg: String ->
+                    toast = Toast.makeText(ctx, msg, Toast.LENGTH_SHORT)
+                    toast?.show()
+                }
+
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background
+                ) {
+                    ShoppingListScreen(state = state, onEvent = viewModel::onEvent, onShowToast = showToast)
+                }
+            }
+        }
+    }
+}

E13RoomShoppingList/app/src/main/java/com/example/e13roomshoppinglist/ShoppingListDatabase.kt

+package com.example.e13roomshoppinglist
+
+import androidx.room.ColumnInfo
+import androidx.room.Dao
+import androidx.room.Database
+import androidx.room.Delete
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import androidx.room.Query
+import androidx.room.RoomDatabase
+import androidx.room.Upsert
+import kotlinx.coroutines.flow.Flow
+
+
+@Database(
+    entities = [ShoppingListItem::class],
+    version = 1
+)
+abstract class ShoppingListDatabase:RoomDatabase() {
+    abstract val dao: ShoppingListDao
+}
+
+
+@Entity
+data class ShoppingListItem(
+    @PrimaryKey(autoGenerate = true)
+    val id: Int? = null,
+
+    @ColumnInfo(defaultValue = "")
+    val name: String,
+    @ColumnInfo(defaultValue = 0.toString())
+    val price: Float,
+    @ColumnInfo(defaultValue = 0.toString())
+    val count: Int,
+)
+
+
+@Dao
+interface ShoppingListDao{
+    @Upsert
+    fun upsertShoppingListItem(shoppingListItem: ShoppingListItem)
+
+    @Delete
+    suspend fun deleteShoppingListItem(shoppingListItem: ShoppingListItem)
+
+    @Query("SELECT * FROM ShoppingListItem")
+    fun getAllShoppingListItems(): Flow<List<ShoppingListItem>>
+
+    @Query("SELECT * FROM ShoppingListItem ORDER BY name ASC")
+    fun getShoppingListItemsOrderedByNameASC(): Flow<List<ShoppingListItem>>
+    @Query("SELECT * FROM ShoppingListItem ORDER BY name DESC")
+    fun getShoppingListItemsOrderedByNameDESC(): Flow<List<ShoppingListItem>>
+
+    @Query("SELECT * FROM ShoppingListItem ORDER BY price ASC")
+    fun getShoppingListItemsOrderedByPriceASC(): Flow<List<ShoppingListItem>>
+    @Query("SELECT * FROM ShoppingListItem ORDER BY price DESC")
+    fun getShoppingListItemsOrderedByPriceDESC(): Flow<List<ShoppingListItem>>
+
+    @Query("SELECT * FROM ShoppingListItem ORDER BY count ASC")
+    fun getShoppingListItemsOrderedByCountASC(): Flow<List<ShoppingListItem>>
+    @Query("SELECT * FROM ShoppingListItem ORDER BY count DESC")
+    fun getShoppingListItemsOrderedByCountDESC(): Flow<List<ShoppingListItem>>
+}

E13RoomShoppingList/app/src/main/java/com/example/e13roomshoppinglist/ShoppingListScreen.kt

+package com.example.e13roomshoppinglist
+
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.horizontalScroll
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.Delete
+import androidx.compose.material.icons.filled.Edit
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Button
+import androidx.compose.material3.Divider
+import androidx.compose.material3.FloatingActionButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.RadioButton
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextField
+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.text.font.FontWeight
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+
+
+@Composable
+fun ShoppingListScreen(
+    state: ShoppingListState,
+    onEvent: (ShoppingListEvent) -> Unit,
+    onShowToast: (String) -> Unit?
+) {
+    Scaffold(
+        floatingActionButton = {
+            FloatingActionButton(onClick = {
+                onEvent(ShoppingListEvent.OpenAddingNewShoppingListItemDialog)
+            }) {
+                Icon(imageVector = Icons.Default.Add, contentDescription = "Add new shopping list item")
+            }
+        },
+        modifier = Modifier.padding(16.dp)
+    ) { padding ->
+        if (state.isAddingNewShoppingListItem || state.isEditingShoppingListItem) {
+            AddShoppingListItemDialog(state = state, onEvent = onEvent, onShowToast = onShowToast)
+        }
+        Column {
+
+
+            Row(
+                modifier = Modifier
+                    .fillMaxWidth(),
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Row(Modifier.padding(end = 8.dp)) {
+                    Text(text = "Sort by:", fontSize = 20.sp, fontWeight = FontWeight.Bold)
+                }
+                Row(Modifier.horizontalScroll(rememberScrollState())) {
+                    SortType.entries.forEach { sortType ->
+                        Row(
+                            modifier = Modifier
+                                .clickable { onEvent(ShoppingListEvent.SetSortType(sortType)) },
+                            verticalAlignment = Alignment.CenterVertically
+                        ) {
+                            RadioButton(
+                                selected = state.sortType == sortType,
+                                onClick = { onEvent(ShoppingListEvent.SetSortType(sortType)) })
+                            Text(text = sortType.name, fontSize = 16.sp)
+                        }
+                    }
+                }
+            }
+            Divider(thickness = 2.dp, color = Color.LightGray, modifier = Modifier.padding(bottom = 8.dp))
+
+            LazyColumn(
+                contentPadding = padding,
+                modifier = Modifier.fillMaxSize(),
+                verticalArrangement = Arrangement.spacedBy(16.dp)
+            ) {
+                items(state.shoppingListItems) { shoppingItem ->
+                    Row(modifier = Modifier.fillMaxWidth()) {
+                        Column(modifier = Modifier.weight(1f)) {
+                            Text(
+                                text = "${shoppingItem.name} - 🧮 ${shoppingItem.count}",
+                                fontSize = 18.sp
+                            )
+                            Text(text = "💶 ${shoppingItem.price}", fontSize = 16.sp)
+                        }
+
+                        IconButton(onClick = {
+                            onEvent(ShoppingListEvent.DeleteShoppingListItem(shoppingItem))
+                                .also {
+                                    onShowToast("Deleted shopping list item ${shoppingItem.name}")
+                                }
+                        }) {
+                            Icon(
+                                imageVector = Icons.Default.Delete,
+                                contentDescription = "Delete Shopping List Item"
+                            )
+                        }
+
+                        IconButton(onClick = {
+                            onEvent(ShoppingListEvent.OpenEditingShoppingListItem(shoppingItem))
+                        }) {
+                            Icon(
+                                imageVector = Icons.Default.Edit,
+                                contentDescription = "Edit Shopping List Item"
+                            )
+                        }
+                    }
+                }
+                item {
+                    Row(
+                        modifier = Modifier
+                            .width(280.dp)
+                            .height(70.dp),
+                        verticalAlignment = Alignment.CenterVertically
+                    ) {
+                        Text(text = "Empty item to fill up room so that the last item does not go under FAB.", fontSize = 12.sp, color = Color.Gray)
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun AddShoppingListItemDialog(
+    state: ShoppingListState,
+    onEvent: (ShoppingListEvent) -> Unit,
+    onShowToast: (String) -> Unit?,
+    modifier: Modifier = Modifier,
+) {
+    AlertDialog(
+        modifier = modifier,
+        onDismissRequest = {
+            if (state.isAddingNewShoppingListItem) {
+                onEvent(ShoppingListEvent.CloseAddingNewShoppingListItemDialog)
+            } else if (state.isEditingShoppingListItem) {
+                onEvent(ShoppingListEvent.CloseEditingShoppingListItem)
+            }
+        },
+        title = { Text(text = "Add new shopping list item") },
+        text = {
+            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                val shoppingListItem = state.newShoppingListItem
+
+                TextField(
+                    value = shoppingListItem.name,
+                    onValueChange = { onEvent(ShoppingListEvent.SetName(it)) },
+                    label = { Text(text = "Item Name") },
+                    placeholder = { Text(text = "Item Name") },
+                )
+                TextField(
+                    value = if(shoppingListItem.count>0) shoppingListItem.count.toString() else "",
+                    label = { Text(text = "Count") },
+                    placeholder = { Text(text = "Count") },
+                    onValueChange = {
+                        var count = it.toIntOrNull()
+                        if (count===null) {
+                            onShowToast("Invalid value for Count!")
+                            count = 0
+                        }
+                        onEvent(ShoppingListEvent.SetCount(count = count))
+                    },
+                    keyboardOptions = KeyboardOptions().copy(
+                        autoCorrect = false,
+                        keyboardType = KeyboardType.Number
+                    ),
+                    leadingIcon = {
+                        Text(text = "🧮", fontSize = 24.sp)
+                    }
+                )
+                TextField(
+                    value = if(shoppingListItem.price>0) shoppingListItem.price.toString() else "",
+                    label = { Text(text = "Price") },
+                    placeholder = { Text(text = "Price") },
+                    onValueChange = {
+                        var price = it.toFloatOrNull()
+                        if (price===null) {
+                            price = 0f
+                        }
+                        onEvent(ShoppingListEvent.SetPrice(price = price))
+                    },
+                    keyboardOptions = KeyboardOptions().copy(
+                        autoCorrect = false,
+                        keyboardType = KeyboardType.Decimal
+                    ),
+                    leadingIcon = {
+                        Text(text = "💶", fontSize = 24.sp)
+                    }
+                )
+            }
+        },
+        confirmButton = {
+            Button(onClick = {
+                if (state.newShoppingListItem.name.length<3){
+                    onShowToast("Item name should not be too short!")
+                    return@Button
+                }
+                if (state.isAddingNewShoppingListItem) {
+                    onEvent(ShoppingListEvent.InsertNewShoppingListItemToDb).also { onShowToast("Added new item to shopping list!") }
+                } else if (state.isEditingShoppingListItem) {
+                    onEvent(ShoppingListEvent.UpdateCurrentlyEditingShoppingListItem).also { onShowToast("Updated shopping list item!") }
+                }
+            }) {
+                Text(text = if (state.isEditingShoppingListItem) "Update" else "Insert")
+            }
+        },
+        dismissButton = {
+            Button(onClick = {
+                if (state.isAddingNewShoppingListItem) {
+                    onEvent(ShoppingListEvent.CloseAddingNewShoppingListItemDialog)
+                } else if (state.isEditingShoppingListItem) {
+                    onEvent(ShoppingListEvent.CloseEditingShoppingListItem)
+                }
+            }) {
+                Text(text = "Close")
+            }
+        }
+    )
+}
\ No newline at end of file

E13RoomShoppingList/app/src/main/java/com/example/e13roomshoppinglist/ShoppingListViewModel.kt

+package com.example.e13roomshoppinglist
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.DelicateCoroutinesApi
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.flatMapLatest
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+
+
+enum class SortType{
+    None,
+    NameASC,
+    NameDESC,
+    PriceASC,
+    PriceDESC,
+    CountASC,
+    CountDESC,
+}
+
+sealed interface ShoppingListEvent{
+    data object OpenAddingNewShoppingListItemDialog: ShoppingListEvent
+    data object CloseAddingNewShoppingListItemDialog: ShoppingListEvent
+    data class SetName(val name: String): ShoppingListEvent
+    data class SetPrice(val price: Float): ShoppingListEvent
+    data class SetCount(val count: Int): ShoppingListEvent
+    data object InsertNewShoppingListItemToDb: ShoppingListEvent
+
+    data class OpenEditingShoppingListItem(val shoppingListItem: ShoppingListItem): ShoppingListEvent
+    data object CloseEditingShoppingListItem: ShoppingListEvent
+    data object UpdateCurrentlyEditingShoppingListItem: ShoppingListEvent
+    data class DeleteShoppingListItem(val shoppingListItem: ShoppingListItem): ShoppingListEvent
+
+    data class SetSortType(val sortType: SortType): ShoppingListEvent
+}
+
+data class NewShoppingListItem(
+    val name: String = "",
+    val price: Float = 0f,
+    val count: Int = 0
+)
+
+data class ShoppingListState(
+    val shoppingListItems: List<ShoppingListItem> = emptyList(),
+
+    val isAddingNewShoppingListItem: Boolean = false,
+    val newShoppingListItem: NewShoppingListItem = NewShoppingListItem(),
+
+    val isEditingShoppingListItem: Boolean = false,
+    val currentlyEditingShoppingListItem: ShoppingListItem? = null,
+
+    val sortType: SortType = SortType.None
+)
+
+
+class ShoppingListViewModel(private val dao: ShoppingListDao): ViewModel() {
+    private val _state = MutableStateFlow(ShoppingListState())
+    private val _sortType = MutableStateFlow(SortType.None)
+    @OptIn(ExperimentalCoroutinesApi::class)
+    private val _shoppingListItems = _sortType.flatMapLatest { sortType ->
+        when(sortType) {
+            SortType.None -> dao.getAllShoppingListItems()
+            SortType.NameASC -> dao.getShoppingListItemsOrderedByNameASC()
+            SortType.NameDESC -> dao.getShoppingListItemsOrderedByNameDESC()
+            SortType.PriceASC -> dao.getShoppingListItemsOrderedByPriceASC()
+            SortType.PriceDESC -> dao.getShoppingListItemsOrderedByPriceDESC()
+            SortType.CountASC -> dao.getShoppingListItemsOrderedByCountASC()
+            SortType.CountDESC -> dao.getShoppingListItemsOrderedByCountDESC()
+        }
+    }.stateIn(viewModelScope, SharingStarted.WhileSubscribed(), emptyList())
+
+    val state = combine(_state, _sortType, _shoppingListItems){
+        state, sortType, shoppingListItems -> state.copy(shoppingListItems = shoppingListItems, sortType=sortType)
+    }.stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), ShoppingListState())
+
+
+
+    @OptIn(DelicateCoroutinesApi::class)
+    fun onEvent(event: ShoppingListEvent){
+        when(event) {
+            is ShoppingListEvent.SetName -> {
+                val newShoppingListItem = _state.value.newShoppingListItem
+                _state.update { it.copy(newShoppingListItem = newShoppingListItem.copy(name = event.name)) }
+            }
+            is ShoppingListEvent.SetCount -> {
+                val newShoppingListItem = _state.value.newShoppingListItem
+                _state.update { it.copy(newShoppingListItem = newShoppingListItem.copy(count = event.count)) }
+            }
+            is ShoppingListEvent.SetPrice -> {
+                val newShoppingListItem = _state.value.newShoppingListItem
+                _state.update { it.copy(newShoppingListItem = newShoppingListItem.copy(price = event.price)) }
+            }
+
+            ShoppingListEvent.OpenAddingNewShoppingListItemDialog -> {
+                _state.update { it.copy(isAddingNewShoppingListItem = true) }
+            }
+            ShoppingListEvent.InsertNewShoppingListItemToDb -> {
+                val newShoppingListItem = _state.value.newShoppingListItem
+                GlobalScope.launch {
+                    dao.upsertShoppingListItem(ShoppingListItem(
+                        name = newShoppingListItem.name,
+                        price = newShoppingListItem.price,
+                        count = newShoppingListItem.count))
+                }
+                _state.update { it.copy(newShoppingListItem=NewShoppingListItem()) }
+            }
+            ShoppingListEvent.CloseAddingNewShoppingListItemDialog -> {
+                _state.update { it.copy(isAddingNewShoppingListItem = false) }
+            }
+
+            is ShoppingListEvent.OpenEditingShoppingListItem -> {
+                _state.update {
+                    val shoppingListItem = event.shoppingListItem
+                    it.copy(
+                    isEditingShoppingListItem = true,
+                    currentlyEditingShoppingListItem = shoppingListItem,
+                    newShoppingListItem = NewShoppingListItem(
+                        name = shoppingListItem.name,
+                        price = shoppingListItem.price,
+                        count = shoppingListItem.count
+                    ))
+                }
+            }
+            ShoppingListEvent.UpdateCurrentlyEditingShoppingListItem -> {
+                val currentlyEditingShoppingListItem = _state.value.currentlyEditingShoppingListItem
+                if (currentlyEditingShoppingListItem===null) return
+                val modifiedShoppingListItemAttrs = _state.value.newShoppingListItem
+                val updatedShoppingListItem = currentlyEditingShoppingListItem.copy(
+                    name = modifiedShoppingListItemAttrs.name,
+                    price = modifiedShoppingListItemAttrs.price,
+                    count = modifiedShoppingListItemAttrs.count
+                )
+
+                GlobalScope.launch { dao.upsertShoppingListItem(updatedShoppingListItem) }
+
+                _state.update {
+                    it.copy(
+                        currentlyEditingShoppingListItem = null,
+                        newShoppingListItem = NewShoppingListItem(),
+                        isEditingShoppingListItem = false)
+                }
+            }
+            ShoppingListEvent.CloseEditingShoppingListItem -> {
+                _state.update {
+                    it.copy(
+                    isEditingShoppingListItem = false,
+                    currentlyEditingShoppingListItem = null,
+                    newShoppingListItem = NewShoppingListItem())
+                }
+            }
+            is ShoppingListEvent.DeleteShoppingListItem -> {
+                GlobalScope.launch {
+                    dao.deleteShoppingListItem(event.shoppingListItem)
+                }
+            }
+
+            is ShoppingListEvent.SetSortType -> {
+                _sortType.update { event.sortType }
+            }
+        }
+    }
+}

E13RoomShoppingList/app/src/main/java/com/example/e13roomshoppinglist/ui/theme/Color.kt

+package com.example.e13roomshoppinglist.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Purple80 = Color(0xFFD0BCFF)
+val PurpleGrey80 = Color(0xFFCCC2DC)
+val Pink80 = Color(0xFFEFB8C8)
+
+val Purple40 = Color(0xFF6650a4)
+val PurpleGrey40 = Color(0xFF625b71)
+val Pink40 = Color(0xFF7D5260)
\ No newline at end of file

E13RoomShoppingList/app/src/main/java/com/example/e13roomshoppinglist/ui/theme/Theme.kt

+package com.example.e13roomshoppinglist.ui.theme
+
+import android.app.Activity
+import android.os.Build
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.dynamicDarkColorScheme
+import androidx.compose.material3.dynamicLightColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.SideEffect
+import androidx.compose.ui.graphics.toArgb
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalView
+import androidx.core.view.WindowCompat
+
+private val DarkColorScheme = darkColorScheme(
+    primary = Purple80,
+    secondary = PurpleGrey80,
+    tertiary = Pink80
+)
+
+private val LightColorScheme = lightColorScheme(
+    primary = Purple40,
+    secondary = PurpleGrey40,
+    tertiary = Pink40
+
+    /* Other default colors to override
+    background = Color(0xFFFFFBFE),
+    surface = Color(0xFFFFFBFE),
+    onPrimary = Color.White,
+    onSecondary = Color.White,
+    onTertiary = Color.White,
+    onBackground = Color(0xFF1C1B1F),
+    onSurface = Color(0xFF1C1B1F),
+    */
+)
+
+@Composable
+fun E13RoomShoppingListTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    // Dynamic color is available on Android 12+
+    dynamicColor: Boolean = true,
+    content: @Composable () -> Unit
+) {
+    val colorScheme = when {
+        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+            val context = LocalContext.current
+            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+        }
+
+        darkTheme -> DarkColorScheme
+        else -> LightColorScheme
+    }
+    val view = LocalView.current
+    if (!view.isInEditMode) {
+        SideEffect {
+            val window = (view.context as Activity).window
+            window.statusBarColor = colorScheme.primary.toArgb()
+            WindowCompat.getInsetsController(window, view).isAppearanceLightStatusBars = darkTheme
+        }
+    }
+
+    MaterialTheme(
+        colorScheme = colorScheme,
+        typography = Typography,
+        content = content
+    )
+}
\ No newline at end of file