Add Dependency Injection

composeApp/build.gradle.kts

@@ -85,13 +85,20 @@ kotlin {
             implementation("com.arkivanov.decompose:decompose:2.2.2-compose-experimental")
             implementation("com.arkivanov.decompose:extensions-compose-jetbrains:2.2.2-compose-experimental")
             //decompose step1
+
+            //koin step1
+            implementation("io.insert-koin:koin-core:3.5.3")
         }
         desktopMain.dependencies {
             implementation(compose.desktop.currentOs)
         }
 
         androidMain.dependencies {
             implementation(libs.ktor.client.android)
+
+            //koin step2
+            implementation("io.insert-koin:koin-android:3.5.3")
+
         }
 
         iosMain.dependencies {

composeApp/src/androidMain/AndroidManifest.xml

@@ -4,6 +4,7 @@
 
     <uses-permission android:name="android.permission.INTERNET"/>
     <application
+        android:name=".MainApplication"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"

composeApp/src/androidMain/kotlin/com/codingambitions/kmpapp2/MainActivity.kt

@@ -9,6 +9,7 @@ import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.tooling.preview.Preview
+import com.arkivanov.decompose.ComponentContext
 import com.arkivanov.decompose.defaultComponentContext
 import com.seiko.imageloader.ImageLoader
 import com.seiko.imageloader.LocalImageLoader
@@ -17,20 +18,34 @@ import com.seiko.imageloader.component.setupDefaultComponents
 import com.seiko.imageloader.defaultImageResultMemoryCache
 import com.seiko.imageloader.option.androidContext
 import okio.Path.Companion.toOkioPath
+import org.koin.android.ext.android.inject
+import org.koin.core.context.loadKoinModules
+import org.koin.dsl.module
 import root.DefaultRootComponent
+import root.RootComponent
 import root.RootContent
 
 class MainActivity : ComponentActivity() {
+
+
+    private val modules = module {
+        single<ComponentContext> { defaultComponentContext() }
+    }
+
+    init {
+        loadKoinModules(modules)
+    }
+
+    private val rootComponent: RootComponent by inject()
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
         setContent {
             CompositionLocalProvider(
                 LocalImageLoader provides remember { generateImageLoader() },
             ) {
-                val homeViewModel = HomeViewModel()
-                val root = DefaultRootComponent(defaultComponentContext(), homeViewModel)
-                RootContent(root, modifier = Modifier)
+                RootContent(rootComponent, modifier = Modifier)
             }
         }
     }

composeApp/src/androidMain/kotlin/com/codingambitions/kmpapp2/MainApplication.kt

@@ -0,0 +1,17 @@
+package com.codingambitions.kmpapp2
+
+import android.app.Application
+import di.initKoin
+import org.koin.android.ext.koin.androidContext
+import org.koin.android.ext.koin.androidLogger
+
+class MainApplication: Application() {
+    override fun onCreate() {
+        super.onCreate()
+
+        initKoin {
+            androidContext(this@MainApplication)
+            androidLogger()
+        }
+    }
+}

composeApp/src/commonMain/kotlin/HomeRepository.kt

@@ -1,10 +1,13 @@
 import apiClient.httpClient
 import data.Product
+import io.ktor.client.HttpClient
 import io.ktor.client.call.body
 import io.ktor.client.request.get
 import kotlinx.coroutines.flow.flow
 
-class HomeRepository {
+class HomeRepository(
+    private val httpClient: HttpClient
+) {
 
     suspend fun getProductsApi(): List<Product> {
         val response = httpClient.get("https://fakestoreapi.com/products")

composeApp/src/commonMain/kotlin/HomeViewModel.kt

@@ -5,13 +5,13 @@ import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 
-class HomeViewModel : ViewModel() {
+class HomeViewModel(
+    private val homeRepository: HomeRepository
+) : ViewModel() {
 
     private val _products = MutableStateFlow<List<Product>>(listOf())
     val products = _products.asStateFlow()
 
-    private val homeRepository = HomeRepository()
-
     init {
         viewModelScope.launch {
             homeRepository.getProducts().collect { products ->

composeApp/src/commonMain/kotlin/di/CommonModule.kt

@@ -0,0 +1,26 @@
+package di
+
+import HomeRepository
+import HomeViewModel
+import org.koin.dsl.module
+import root.DefaultRootComponent
+import root.RootComponent
+
+fun commonModule() = networkModule() + module {
+
+    single {
+        HomeRepository(get())
+    }
+
+    single {
+        HomeViewModel(get())
+    }
+
+    single<RootComponent> {
+        DefaultRootComponent(
+            componentContext = get(),
+            homeViewModel = get()
+        )
+    }
+
+}

composeApp/src/commonMain/kotlin/di/Koin.kt

@@ -0,0 +1,13 @@
+package di
+
+import org.koin.core.context.startKoin
+import org.koin.core.module.Module
+import org.koin.dsl.KoinAppDeclaration
+
+fun initKoin(
+    additionalModules: List<Module> = emptyList(),
+    appDeclaration: KoinAppDeclaration = {}
+) = startKoin {
+    appDeclaration()
+    modules(additionalModules + commonModule() + platformModule())
+}

composeApp/src/commonMain/kotlin/di/NetworkModule.kt

@@ -0,0 +1,20 @@
+package di
+
+import io.ktor.client.HttpClient
+import io.ktor.client.plugins.contentnegotiation.ContentNegotiation
+import io.ktor.serialization.kotlinx.json.json
+import kotlinx.serialization.json.Json
+import org.koin.dsl.module
+
+fun networkModule() = module {
+    single {
+        HttpClient {
+            install(ContentNegotiation) {
+                json(Json {
+                    prettyPrint = true
+                    ignoreUnknownKeys = true
+                })
+            }
+        }
+    }
+}

composeApp/src/commonMain/kotlin/di/PlatformModule.kt

@@ -0,0 +1,5 @@
+package di
+
+import org.koin.dsl.module
+
+fun platformModule() = module {}

composeApp/src/desktopMain/kotlin/di/KoinJvm.kt

@@ -0,0 +1,12 @@
+package di
+
+import com.arkivanov.decompose.ComponentContext
+import com.arkivanov.decompose.DefaultComponentContext
+import com.arkivanov.essenty.lifecycle.LifecycleRegistry
+import org.koin.dsl.module
+
+val jvmModule = module {
+    single { LifecycleRegistry() }
+    single<ComponentContext> { DefaultComponentContext(lifecycle = get<LifecycleRegistry>()) }
+}
+fun startKoinJvm() = initKoin(additionalModules = listOf(jvmModule))

composeApp/src/desktopMain/kotlin/main.kt

@@ -8,20 +8,20 @@ import com.arkivanov.essenty.lifecycle.LifecycleRegistry
 import com.seiko.imageloader.ImageLoader
 import com.seiko.imageloader.component.setupDefaultComponents
 import com.seiko.imageloader.defaultImageResultMemoryCache
+import di.startKoinJvm
 import okio.Path.Companion.toOkioPath
 import root.DefaultRootComponent
+import root.RootComponent
 import root.RootContent
 import java.io.File
 
+
+val koin = startKoinJvm().koin
+
 fun main() = application {
     Window(onCloseRequest = ::exitApplication, title = "KmpApp2") {
-        val homeViewModel = HomeViewModel()
-        val root =
-            DefaultRootComponent(
-                componentContext = DefaultComponentContext(LifecycleRegistry()),
-                homeViewModel
-            )
-        RootContent(root, modifier = Modifier)
+        val rootComponent = koin.get<RootComponent>()
+        RootContent(rootComponent, modifier = Modifier)
 
     }
 }

composeApp/src/iosMain/kotlin/di/DependencyInjection.kt

@@ -0,0 +1,21 @@
+package di
+
+import com.arkivanov.decompose.ComponentContext
+import com.arkivanov.decompose.DefaultComponentContext
+import com.arkivanov.essenty.lifecycle.LifecycleRegistry
+import org.koin.core.Koin
+import org.koin.dsl.module
+import root.RootComponent
+
+val iosModule = module {
+    single { LifecycleRegistry() }
+    single<ComponentContext> { DefaultComponentContext(lifecycle = get<LifecycleRegistry>()) }
+}
+
+fun initKoinIOS() = initKoin(additionalModules = listOf(iosModule))
+
+val Koin.rootComponent: RootComponent
+    get() = get()
+
+val Koin.lifecycleRegistry: LifecycleRegistry
+    get() = get()

composeApp/src/jsMain/kotlin/di/KoinJs.kt

@@ -0,0 +1,13 @@
+package di
+
+import com.arkivanov.decompose.ComponentContext
+import com.arkivanov.decompose.DefaultComponentContext
+import com.arkivanov.essenty.lifecycle.LifecycleRegistry
+import org.koin.dsl.module
+
+
+val jsModule = module {
+    single { LifecycleRegistry() }
+    single<ComponentContext> { DefaultComponentContext(lifecycle = get<LifecycleRegistry>()) }
+}
+fun startKoinJs() = initKoin(additionalModules = listOf(jsModule))

composeApp/src/jsMain/kotlin/main.kt

@@ -1,21 +1,21 @@
-import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.remember
 import androidx.compose.ui.ExperimentalComposeUiApi
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.window.CanvasBasedWindow
-import androidx.compose.ui.window.Window
-import com.arkivanov.decompose.DefaultComponentContext
-import com.arkivanov.essenty.lifecycle.LifecycleRegistry
 import com.seiko.imageloader.ImageLoader
 import com.seiko.imageloader.LocalImageLoader
 import com.seiko.imageloader.component.setupDefaultComponents
 import com.seiko.imageloader.defaultImageResultMemoryCache
+import di.startKoinJs
 import okio.FileSystem
 import org.jetbrains.skiko.wasm.onWasmReady
-import root.DefaultRootComponent
+import root.RootComponent
 import root.RootContent
 
+
+val koin = startKoinJs().koin
+
 @OptIn(ExperimentalComposeUiApi::class)
 fun main() {
 
@@ -24,12 +24,7 @@ fun main() {
             CompositionLocalProvider(
                 LocalImageLoader provides remember { generateImageLoader() },
             ) {
-                val homeViewModel = HomeViewModel()
-                val root =
-                    DefaultRootComponent(
-                        componentContext = DefaultComponentContext(LifecycleRegistry()),
-                        homeViewModel
-                    )
+                val root = koin.get<RootComponent>()
                 RootContent(root, modifier = Modifier)
             }
         }

iosApp/iosApp.xcodeproj/project.pbxproj

@@ -9,15 +9,17 @@
 /* Begin PBXBuildFile section */
 		058557BB273AAA24004C7B11 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 058557BA273AAA24004C7B11 /* Assets.xcassets */; };
 		058557D9273AAEEB004C7B11 /* Preview Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 058557D8273AAEEB004C7B11 /* Preview Assets.xcassets */; };
+		108200342B56FD090037B781 /* Koin.swift in Sources */ = {isa = PBXBuildFile; fileRef = 108200332B56FD090037B781 /* Koin.swift */; };
 		2152FB042600AC8F00CF470E /* iOSApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2152FB032600AC8F00CF470E /* iOSApp.swift */; };
 		7555FF83242A565900829871 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7555FF82242A565900829871 /* ContentView.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
 		058557BA273AAA24004C7B11 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		058557D8273AAEEB004C7B11 /* Preview Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = "Preview Assets.xcassets"; sourceTree = "<group>"; };
+		108200332B56FD090037B781 /* Koin.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Koin.swift; sourceTree = "<group>"; };
 		2152FB032600AC8F00CF470E /* iOSApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = iOSApp.swift; sourceTree = "<group>"; };
-		7555FF7B242A565900829871 /* .app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = .app; sourceTree = BUILT_PRODUCTS_DIR; };
+		7555FF7B242A565900829871 /* .app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; name = .app; path = KmpApp2.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		7555FF82242A565900829871 /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
 		7555FF8C242A565B00829871 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		AB3632DC29227652001CCB65 /* Config.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; path = Config.xcconfig; sourceTree = "<group>"; };
@@ -65,6 +67,7 @@
 				7555FF8C242A565B00829871 /* Info.plist */,
 				2152FB032600AC8F00CF470E /* iOSApp.swift */,
 				058557D7273AAEEB004C7B11 /* Preview Content */,
+				108200332B56FD090037B781 /* Koin.swift */,
 			);
 			path = iosApp;
 			sourceTree = "<group>";
@@ -168,6 +171,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				108200342B56FD090037B781 /* Koin.swift in Sources */,
 				2152FB042600AC8F00CF470E /* iOSApp.swift in Sources */,
 				7555FF83242A565900829871 /* ContentView.swift in Sources */,
 			);

iosApp/iosApp/Koin.swift

@@ -0,0 +1,22 @@
+//
+//  Koin.swift
+//  iosApp
+//
+//  Created by Sunil Kumar on 16/01/24.
+//  Copyright © 2024 orgName. All rights reserved.
+//
+
+import Foundation
+import ComposeApp
+
+
+private var _koin: Koin_coreKoin? = nil
+var koin: Koin_coreKoin {
+    return _koin!
+}
+
+
+func startKoin() {
+    let koinApplication = DependencyInjectionKt.doInitKoinIOS()
+    _koin = koinApplication.koin
+}