Use Koin Dependency Injection

app/build.gradle

@@ -39,7 +39,6 @@ android {
 }
 
 dependencies {
-    def nav_version = '2.5.0-alpha03'
 
     // UI
     implementation 'androidx.core:core-ktx:1.7.0'
@@ -49,22 +48,26 @@ dependencies {
     implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
     implementation "androidx.navigation:navigation-ui-ktx:$nav_version"
     implementation "androidx.navigation:navigation-fragment-ktx:$nav_version"
-    implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:$nav_version"
+    implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:$android_lifecycle_version"
 
     // Processing
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.0-native-mt'
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.0-native-mt'
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutines_version"
 
     // IO Service
     implementation 'com.squareup.retrofit2:retrofit:2.9.0'
     implementation 'com.github.bumptech.glide:glide:4.13.1'
     implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
-    implementation 'com.squareup.okhttp3:logging-interceptor:5.0.0-alpha.5'
+    implementation 'com.squareup.okhttp3:logging-interceptor:5.0.0-alpha.6'
+
+    // DI
+    implementation "io.insert-koin:koin-core:$koin_version"
+    implementation "io.insert-koin:koin-android:$koin_version"
 
     // Test
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation "androidx.arch.core:core-testing:2.1.0"
-    androidTestImplementation "com.squareup.okhttp3:mockwebserver:4.1.0"
+    androidTestImplementation 'com.squareup.okhttp3:mockwebserver:5.0.0-alpha.6'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
 }

app/src/main/AndroidManifest.xml

@@ -8,6 +8,7 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
 
     <application
+        android:name=".ApplicationClass"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"

app/src/main/java/com/github/husseinhj/githubuser/ApplicationClass.kt

@@ -0,0 +1,26 @@
+package com.github.husseinhj.githubuser
+
+import android.app.Application
+import org.koin.core.context.startKoin
+import org.koin.android.ext.koin.androidLogger
+import org.koin.android.ext.koin.androidContext
+import com.github.husseinhj.githubuser.modules.*
+
+class ApplicationClass : Application() {
+
+    override fun onCreate() {
+        super.onCreate()
+
+        startKoin {
+            androidLogger()
+            androidContext(this@ApplicationClass)
+            modules(listOf(
+                applicationModule,
+                repositoryModules,
+                viewModelModules,
+                webServiceModules,
+                retrofitModule
+            ))
+        }
+    }
+}

app/src/main/java/com/github/husseinhj/githubuser/adapters/UserSearchResultAdapter.kt

@@ -1,11 +1,11 @@
 package com.github.husseinhj.githubuser.adapters
 
-import android.annotation.SuppressLint
-import android.content.Context
-import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.content.Context
 import android.widget.BaseAdapter
+import android.view.LayoutInflater
+import android.annotation.SuppressLint
 import com.github.husseinhj.githubuser.R
 import com.github.husseinhj.githubuser.models.UserSimpleDetailsModel
 import com.github.husseinhj.githubuser.views.viewholders.UserSearchResultViewHolder

app/src/main/java/com/github/husseinhj/githubuser/bases/BaseAppCompatActivity.kt

@@ -0,0 +1,26 @@
+package com.github.husseinhj.githubuser.bases
+
+import android.view.Menu
+import com.github.husseinhj.githubuser.R
+import org.koin.android.ext.android.inject
+import org.koin.core.parameter.parametersOf
+import androidx.appcompat.app.AppCompatActivity
+import com.github.husseinhj.githubuser.utils.ToolbarAppearance
+
+open class BaseAppCompatActivity: AppCompatActivity() {
+    private val toolbarAppearance: ToolbarAppearance by inject {
+        parametersOf(this, R.menu.main_menu)
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        toolbarAppearance.configureSearchBarByMenu(menu)
+
+        return super.onCreateOptionsMenu(menu)
+    }
+
+    override fun onBackPressed() {
+        if (!toolbarAppearance.collapseSearchBar()) {
+            super.onBackPressed()
+        }
+    }
+}

app/src/main/java/com/github/husseinhj/githubuser/bases/BaseFragment.kt

@@ -1,47 +1,37 @@
 package com.github.husseinhj.githubuser.bases
 
 import android.os.Bundle
-import android.content.Context
-import androidx.lifecycle.ViewModel
 import androidx.fragment.app.Fragment
 import com.github.husseinhj.githubuser.R
-import androidx.lifecycle.ViewModelProvider
-import androidx.lifecycle.SavedStateViewModelFactory
+import org.koin.android.ext.android.inject
+import org.koin.core.parameter.parametersOf
 import com.github.husseinhj.githubuser.extensions.navigate
 import com.github.husseinhj.githubuser.utils.ToolbarAppearance
+import com.github.husseinhj.githubuser.utils.NavigationAppearance
 import com.github.husseinhj.githubuser.utils.OnTextChangedListener
 import com.github.husseinhj.githubuser.utils.OnFocusChangedListener
-import com.github.husseinhj.githubuser.views.activities.MainActivity
 
 open class BaseFragment: Fragment() {
-    private var title: String? = null
-    private var toolbarAppearance: ToolbarAppearance? = null
+    private val toolbarAppearance: ToolbarAppearance by inject {
+        parametersOf(this.activity, R.menu.main_menu)
+    }
     private var searchBarTextChanged: OnTextChangedListener? = null
-    private var searchBarFocusListener: OnFocusChangedListener? = null
-
-    override fun onAttach(context: Context) {
-        super.onAttach(context)
-        toolbarAppearance = (this.requireActivity() as? MainActivity)?.toolbarAppearance
+    private val navigationAppearance: NavigationAppearance by inject {
+        parametersOf(this.activity)
     }
+    private var searchBarFocusListener: OnFocusChangedListener? = null
 
     override fun onStart() {
         super.onStart()
 
-        toolbarAppearance?.setTitle(title)
-
-        toolbarAppearance?.setOnFocusListener {
+        toolbarAppearance.setOnFocusListener {
             this.searchBarFocusListener?.invoke(it)
         }
-        toolbarAppearance?.setOnTextChangedListener {
+        toolbarAppearance.setOnTextChangedListener {
             this.searchBarTextChanged?.invoke(it)
         }
     }
 
-    internal fun <T : ViewModel> getSavedStateViewModel(modelClass: Class<T>): T {
-        val savedStateVM = SavedStateViewModelFactory(null, this)
-        return ViewModelProvider(this, savedStateVM)[modelClass]
-    }
-
     fun setOnSearchBarFocusListener(listener: OnFocusChangedListener) {
         this.searchBarFocusListener = listener
     }
@@ -52,43 +42,32 @@ open class BaseFragment: Fragment() {
 
     fun navigateFromHomeToSearchFragment() {
         try {
-            this.navigate(
-                to = R.id.action_homeFragment_to_searchUserFragment,
-                title = getString(R.string.user_search_title),
-                showSoftBackButton = true
-            )
+            this.navigate(to = R.id.action_homeFragment_to_searchUserFragment)
         } catch (e: Exception) {
             println("Could not navigate for ${e.message}")
         }
-        toolbarAppearance?.expandSearchBar()
-        toolbarAppearance?.focusOnSearchBar()
+        toolbarAppearance.expandSearchBar()
+        toolbarAppearance.focusOnSearchBar()
     }
 
     fun navigateFromDetailToSearchFragment() {
-        this.navigate(
-            to = R.id.action_userDetailFragment_to_searchUserFragment,
-            title = getString(R.string.user_search_title),
-            showSoftBackButton = true
-        )
+        this.navigate(to = R.id.action_userDetailFragment_to_searchUserFragment)
     }
 
     fun navigateFromSearchToDetailFragment(data: Bundle) {
-        toolbarAppearance?.collapseSearchBar()
-        toolbarAppearance?.clearFocusOnSearchBar()
+        toolbarAppearance.collapseSearchBar()
+        toolbarAppearance.clearFocusOnSearchBar()
 
         this.navigate(
             data = data,
-            to = R.id.action_searchUserFragment_to_userDetailFragment,
-            title = getString(R.string.user_profile_title),
-            showSoftBackButton = true
-        )
+            to = R.id.action_searchUserFragment_to_userDetailFragment)
     }
 
     fun setTitle(pageTitle: String) {
-        this.title = pageTitle
+        navigationAppearance.setTitle(pageTitle)
     }
 
     fun enableBackButton(enable: Boolean) {
-        toolbarAppearance?.setShowBackSoftButton(enable)
+        navigationAppearance.setShowBackSoftButton(enable)
     }
 }

app/src/main/java/com/github/husseinhj/githubuser/consts/Const.kt

@@ -1,5 +1,8 @@
 package com.github.husseinhj.githubuser.consts
 
+const val READ_TIMEOUT = 30L
+const val WRITE_TIMEOUT = 30L
+const val CONNECT_TIMEOUT = 30L
 const val DEBOUNCE_FOR_SEARCH: Long = 300L
 const val GITHUB_USERNAME: String = "github_username"
 const val GITHUB_API_BASE_URL: String = "https://api.github.com/"

app/src/main/java/com/github/husseinhj/githubuser/extensions/AppCompatActivityExt.kt

@@ -3,6 +3,8 @@ package com.github.husseinhj.githubuser.extensions
 import androidx.appcompat.app.AppCompatActivity
 
 fun AppCompatActivity.showSoftBackButton(show: Boolean) {
-    this.supportActionBar?.setDisplayHomeAsUpEnabled(show)
-    this.supportActionBar?.setDisplayShowHomeEnabled(show)
+    this.supportActionBar?.apply {
+        setDisplayHomeAsUpEnabled(show)
+        setDisplayShowHomeEnabled(show)
+    }
 }

app/src/main/java/com/github/husseinhj/githubuser/extensions/FrgmentExt.kt

@@ -2,9 +2,7 @@ package com.github.husseinhj.githubuser.extensions
 
 import android.os.Bundle
 import androidx.fragment.app.Fragment
-import androidx.appcompat.app.AppCompatActivity
 import androidx.navigation.fragment.NavHostFragment
-import com.github.husseinhj.githubuser.views.activities.MainActivity
 
 fun Fragment.navigate(to: Int, data: Bundle? = null) {
     NavHostFragment.findNavController(this)
@@ -14,21 +12,4 @@ fun Fragment.navigate(to: Int, data: Bundle? = null) {
 fun Fragment.navigateUp() {
     NavHostFragment.findNavController(this)
         .navigateUp()
-}
-
-fun Fragment.navigate(to: Int, data: Bundle? = null, title: String? = null, showSoftBackButton: Boolean? = null) {
-    NavHostFragment.findNavController(this)
-        .navigate(to, data)
-
-    val toolbarAppearance = (this.activity as? MainActivity)?.toolbarAppearance
-    toolbarAppearance?.setTitle(title)
-    toolbarAppearance?.setShowBackSoftButton(showSoftBackButton ?: false)
-}
-
-fun Fragment.showSoftBackButton(show: Boolean) {
-    this.getAppCompatActivity().showSoftBackButton(show)
-}
-
-fun Fragment.getAppCompatActivity(): AppCompatActivity {
-    return this.requireActivity() as AppCompatActivity
 }

app/src/main/java/com/github/husseinhj/githubuser/modules/DIApplicationModule.kt

@@ -0,0 +1,17 @@
+package com.github.husseinhj.githubuser.modules
+
+import org.koin.dsl.module
+import com.github.husseinhj.githubuser.utils.ToolbarAppearance
+import com.github.husseinhj.githubuser.utils.NavigationAppearance
+
+val applicationModule = module {
+    // Toolbar
+    single {
+        ToolbarAppearance(get(), get())
+    }
+
+    // Navigation
+    factory {
+        NavigationAppearance(get())
+    }
+}

app/src/main/java/com/github/husseinhj/githubuser/modules/RepositoryModules.kt

@@ -0,0 +1,15 @@
+package com.github.husseinhj.githubuser.modules
+
+import org.koin.dsl.module
+import com.github.husseinhj.githubuser.services.repositories.UserRepository
+import com.github.husseinhj.githubuser.services.repositories.SearchRepository
+
+val repositoryModules = module {
+    single {
+        UserRepository(get())
+    }
+
+    single {
+        SearchRepository(get())
+    }
+}

app/src/main/java/com/github/husseinhj/githubuser/modules/RetrofitModules.kt

@@ -0,0 +1,14 @@
+package com.github.husseinhj.githubuser.modules
+
+import org.koin.dsl.module
+import com.google.gson.GsonBuilder
+import com.github.husseinhj.githubuser.services.providers.getRetrofit
+import com.github.husseinhj.githubuser.services.providers.retrofitHttpClient
+import com.github.husseinhj.githubuser.services.interceptors.AuthenticationInterceptor
+
+val retrofitModule = module {
+    single { getRetrofit() }
+    single { retrofitHttpClient() }
+    single { GsonBuilder().create() }
+    single { AuthenticationInterceptor() }
+}

app/src/main/java/com/github/husseinhj/githubuser/modules/ViewModelModules.kt

@@ -0,0 +1,30 @@
+package com.github.husseinhj.githubuser.modules
+
+import org.koin.dsl.module
+import org.koin.androidx.viewmodel.dsl.viewModel
+import com.github.husseinhj.githubuser.viewmodels.fragments.HomeViewModel
+import com.github.husseinhj.githubuser.viewmodels.fragments.SearchUserViewModel
+import com.github.husseinhj.githubuser.viewmodels.fragments.UserDetailViewModel
+import com.github.husseinhj.githubuser.viewmodels.activities.MainActivityViewModel
+
+val viewModelModules = module {
+    // Main Activity ViewModel
+    viewModel {
+        MainActivityViewModel()
+    }
+
+    // On-Boarding ViewModel
+    viewModel {
+        HomeViewModel()
+    }
+
+    // Search User ViewModel
+    viewModel {
+        SearchUserViewModel(get(), get())
+    }
+
+    // User Profile ViewModel
+    viewModel {
+        UserDetailViewModel(get(), get())
+    }
+}

app/src/main/java/com/github/husseinhj/githubuser/modules/WebServiceModules.kt

@@ -0,0 +1,15 @@
+package com.github.husseinhj.githubuser.modules
+
+import com.github.husseinhj.githubuser.services.repositories.SearchRepository
+import com.github.husseinhj.githubuser.services.repositories.UserRepository
+import retrofit2.Retrofit
+import org.koin.dsl.module
+import com.github.husseinhj.githubuser.services.repositories.interfaces.IUserRepository
+import com.github.husseinhj.githubuser.services.repositories.interfaces.ISearchRepository
+
+val webServiceModules = module {
+    single(createdAtStart = false) { get<Retrofit>().create(IUserRepository::class.java) }
+    single(createdAtStart = false) { get<Retrofit>().create(ISearchRepository::class.java) }
+    single { UserRepository(get()) }
+    single { SearchRepository(get()) }
+}