Add: Main app, main activity and navigation handling

app/src/main/java/dev/carlos/acronyms/MainApplication.kt

@@ -0,0 +1,32 @@
+package dev.carlos.acronyms
+
+import android.app.Application
+import dev.carlos.acronyms.di.appModules
+import org.koin.android.ext.koin.androidContext
+import org.koin.core.context.startKoin
+import timber.log.Timber
+
+@Suppress("unused")
+class MainApplication : Application() {
+    override fun onCreate() {
+        super.onCreate()
+        setupLogger()
+        setupDi()
+    }
+
+    private fun setupLogger() {
+        Timber.plant(Timber.DebugTree())
+    }
+
+    private fun setupDi() {
+        startKoin {
+            androidContext(this@MainApplication)
+
+            modules(
+                listOf(
+                    appModules
+                )
+            )
+        }
+    }
+}

app/src/main/java/dev/carlos/acronyms/di/AppModules.kt

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+package dev.carlos.acronyms.di
+
+import dev.carlos.acronyms.BuildConfig
+import dev.carlos.acronyms.viewmodel.NavigationViewmodel
+import dev.carlos.core.domain.network.RemoteClient
+import dev.carlos.core.navigation.NavigationRouter
+import org.koin.androidx.viewmodel.dsl.viewModel
+import org.koin.dsl.module
+
+val appModules = module {
+    // Retrofit
+    single { RemoteClient(BuildConfig.BASE_ENDPOINT) }
+
+    // Navigation
+    single { NavigationRouter() }
+    viewModel { NavigationViewmodel() }
+}

app/src/main/java/dev/carlos/acronyms/viewmodel/NavigationViewmodel.kt

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+package dev.carlos.acronyms.viewmodel
+
+import android.os.Bundle
+import androidx.annotation.IdRes
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import dev.carlos.core.navigation.NavigationEvent
+
+class NavigationViewmodel : ViewModel() {
+
+    val navigate = MutableLiveData<Pair<@IdRes Int, Bundle>>()
+
+    fun onNavigationEvent(event: NavigationEvent) {
+        when (event) {
+            else -> throw NoWhenBranchMatchedException("Undefined navigation event parent")
+        }
+    }
+}

app/src/main/java/dev/carlos/acronyms/views/MainActivity.kt

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+package dev.carlos.acronyms.views
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.navigation.findNavController
+import androidx.navigation.ui.NavigationUI
+import dev.carlos.acronyms.R
+import dev.carlos.acronyms.di.appModules
+import dev.carlos.acronyms.viewmodel.NavigationViewmodel
+import dev.carlos.core.extensions.findNavHostFragment
+import dev.carlos.core.extensions.observeNonNull
+import dev.carlos.core.navigation.NavigationRouter
+import org.koin.android.ext.android.inject
+import org.koin.android.ext.koin.androidContext
+import org.koin.androidx.viewmodel.ext.android.viewModel
+import org.koin.core.context.startKoin
+
+class MainActivity : AppCompatActivity() {
+
+    private val navController by lazy { findNavController(R.id.main_fragment_container) }
+    private val navRouter: NavigationRouter by inject()
+    private val viewModel: NavigationViewmodel by viewModel()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+        setupNavigation()
+    }
+
+    private fun setupNavigation() {
+        navController.setGraph(R.navigation.main_navigation)
+        navRouter.setOnNavigationEvent {
+            viewModel.onNavigationEvent(it)
+        }
+        viewModel.navigate.observeNonNull(this) { pair ->
+            // Pair.first is a Navigation Id
+            // Pair.second is a Bundle
+            navController.navigate(pair.first, pair.second)
+        }
+
+        NavigationUI.setupActionBarWithNavController(this, navController)
+    }
+}