feat: Implement data layer and basic quiz fetching logic

This commit introduces the data layer, including the `QuizRepository` and its implementation, and integrates it with the domain layer's `GetQuizUseCase`. It also sets up Hilt for dependency injection in the app module and makes preliminary UI changes to display fetched quiz data.

Key changes include:

- **Data Layer (`model:data` module):**
    - Added `QuizRepositoryImpl` which implements `QuizRepository` from the domain layer.
    - Implemented `getQuiz()` in `QuizRepositoryImpl` to fetch quiz data from `QuizApi` and map it to the domain `Quiz` model using `QuizMapper`.
    - Created `QuizMapper` to convert `QuizResponseDto` to the domain `Quiz` model.
    - Added `RepositoryModule` for Hilt to provide `QuizRepository` bindings.
- **Domain Layer (`domain` module):**
    - Created `Quiz` domain model.
    - Defined `QuizRepository` interface.
    - Implemented `GetQuizUseCase` to interact with `QuizRepository`.
- **App Module (`app` module):**
    - Added `MyApplication` class annotated with `@HiltAndroidApp`.
    - Updated `AndroidManifest.xml` to use `MyApplication` and add internet permission.
    - In `MainActivity`:
        - Injected `GetQuizUseCase`.
        - Used `LaunchedEffect` to call the use case and update a mutable state `quizId`.
        - Modified the `Greeting` composable to display the fetched `quizId`.
    - Added dependency on the `domain` module in `app/build.gradle.kts`.
- **Network Layer (`core:network` module):**
    - Moved DTOs from `core.network.model` package to `core.network.models`.
    - Made `NetworkModule` internal.
    - Removed unused `QuizService` interface and `QuizServiceImpl` class.
- **Testing (`core:network` test):**
    - Updated import path for `QuizResponseDto` in `QuizResponseDtoParsingTest`.

app/build.gradle.kts

@@ -28,6 +28,7 @@ android {
 
 dependencies {
     implementation(projects.ui.quiz)
+    implementation(projects.domain)
 
     implementation(projects.model.data)
 

app/src/main/AndroidManifest.xml

@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
-    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-permission android:name="android.permission.INTERNET" />
 
     <application
+        android:name=".MyApplication"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
@@ -14,7 +16,6 @@
         <activity
             android:name=".MainActivity"
             android:exported="true"
-            android:label="@string/app_name"
             android:theme="@style/Theme.KahootQuiz">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/dev/adriankuta/kahootquiz/MainActivity.kt

@@ -9,19 +9,39 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+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.tooling.preview.Preview
+import dagger.hilt.android.AndroidEntryPoint
+import dev.adriankuta.kahootquiz.domain.usecases.GetQuizUseCase
 import dev.adriankuta.kahootquiz.ui.theme.KahootQuizTheme
+import javax.inject.Inject
 
+@AndroidEntryPoint
 class MainActivity : ComponentActivity() {
+
+    @Inject
+    lateinit var getQuizUseCase: GetQuizUseCase
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
         setContent {
             KahootQuizTheme {
                 Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
+
+                    var quizId by remember { mutableStateOf<String?>(null) }
+
+                    LaunchedEffect(Unit) {
+                        quizId = getQuizUseCase().id
+                    }
+
                     Greeting(
-                        name = "Android",
+                        name = quizId ?: "Android",
                         modifier = Modifier.padding(innerPadding)
                     )
                 }

app/src/main/java/dev/adriankuta/kahootquiz/MyApplication.kt

@@ -0,0 +1,7 @@
+package dev.adriankuta.kahootquiz
+
+import android.app.Application
+import dagger.hilt.android.HiltAndroidApp
+
+@HiltAndroidApp
+class MyApplication: Application()

core/network/src/main/kotlin/dev/adriankuta/kahootquiz/core/network/QuizService.kt

@@ -1,4 +0,0 @@
-package dev.adriankuta.kahootquiz.core.network
-
-interface QuizService {
-}

core/network/src/main/kotlin/dev/adriankuta/kahootquiz/core/network/QuizServiceImpl.kt

@@ -1,4 +0,0 @@
-package dev.adriankuta.kahootquiz.core.network
-
-internal class QuizServiceImpl: QuizService {
-}

core/network/src/main/kotlin/dev/adriankuta/kahootquiz/core/network/di/NetworkModule.kt

@@ -12,7 +12,7 @@ import javax.inject.Singleton
 
 @Module
 @InstallIn(SingletonComponent::class)
-object NetworkModule {
+internal object NetworkModule {
 
     @Provides
     @Singleton

core/network/src/main/kotlin/dev/adriankuta/kahootquiz/core/network/models/CommonDtos.kt

@@ -1,4 +1,4 @@
-package dev.adriankuta.kahootquiz.core.network.model
+package dev.adriankuta.kahootquiz.core.network.models
 
 // Commonly reused DTOs
 

core/network/src/main/kotlin/dev/adriankuta/kahootquiz/core/network/models/ContentTagsDto.kt

@@ -1,4 +1,4 @@
-package dev.adriankuta.kahootquiz.core.network.model
+package dev.adriankuta.kahootquiz.core.network.models
 
 // Content tags DTOs
 

core/network/src/main/kotlin/dev/adriankuta/kahootquiz/core/network/models/CoverDtos.kt

@@ -1,4 +1,4 @@
-package dev.adriankuta.kahootquiz.core.network.model
+package dev.adriankuta.kahootquiz.core.network.models
 
 // Cover metadata and related DTOs
 

core/network/src/main/kotlin/dev/adriankuta/kahootquiz/core/network/models/MetadataDtos.kt

@@ -1,4 +1,4 @@
-package dev.adriankuta.kahootquiz.core.network.model
+package dev.adriankuta.kahootquiz.core.network.models
 
 // Metadata section DTOs
 

core/network/src/main/kotlin/dev/adriankuta/kahootquiz/core/network/models/QuestionDtos.kt

@@ -1,4 +1,4 @@
-package dev.adriankuta.kahootquiz.core.network.model
+package dev.adriankuta.kahootquiz.core.network.models
 
 // Question and choice related DTOs
 

core/network/src/main/kotlin/dev/adriankuta/kahootquiz/core/network/models/QuizResponse.kt

@@ -1,4 +1,4 @@
-package dev.adriankuta.kahootquiz.core.network.model
+package dev.adriankuta.kahootquiz.core.network.models
 
 // This file used to contain all DTOs in one place.
 // The DTOs have been split into separate files for maintainability:

core/network/src/main/kotlin/dev/adriankuta/kahootquiz/core/network/models/QuizResponseDto.kt

@@ -1,4 +1,4 @@
-package dev.adriankuta.kahootquiz.core.network.model
+package dev.adriankuta.kahootquiz.core.network.models
 
 import com.google.gson.annotations.SerializedName
 

core/network/src/main/kotlin/dev/adriankuta/kahootquiz/core/network/retrofit/QuizApi.kt

@@ -1,6 +1,6 @@
 package dev.adriankuta.kahootquiz.core.network.retrofit
 
-import dev.adriankuta.kahootquiz.core.network.model.QuizResponseDto
+import dev.adriankuta.kahootquiz.core.network.models.QuizResponseDto
 import retrofit2.http.GET
 
 interface QuizApi {

core/network/src/test/kotlin/dev/adriankuta/kahootquiz/core/network/QuizResponseDtoParsingTest.kt

@@ -2,7 +2,7 @@ package dev.adriankuta.kahootquiz.core.network
 
 import com.google.common.truth.Truth.assertThat
 import com.google.gson.Gson
-import dev.adriankuta.kahootquiz.core.network.model.QuizResponseDto
+import dev.adriankuta.kahootquiz.core.network.models.QuizResponseDto
 import org.junit.Test
 import java.io.InputStreamReader
 

domain/src/main/kotlin/dev/adriankuta/kahootquiz/domain/models/Quiz.kt

@@ -0,0 +1,5 @@
+package dev.adriankuta.kahootquiz.domain.models
+
+data class Quiz(
+    val id: String
+)

domain/src/main/kotlin/dev/adriankuta/kahootquiz/domain/repositories/QuizRepository.kt

@@ -0,0 +1,7 @@
+package dev.adriankuta.kahootquiz.domain.repositories
+
+import dev.adriankuta.kahootquiz.domain.models.Quiz
+
+interface QuizRepository {
+    suspend fun getQuiz(): Quiz
+}

domain/src/main/kotlin/dev/adriankuta/kahootquiz/domain/usecases/GetQuizUseCase.kt

@@ -0,0 +1,14 @@
+package dev.adriankuta.kahootquiz.domain.usecases
+
+import dev.adriankuta.kahootquiz.domain.models.Quiz
+import dev.adriankuta.kahootquiz.domain.repositories.QuizRepository
+import javax.inject.Inject
+
+class GetQuizUseCase @Inject constructor(
+    private val quizRepository: QuizRepository
+) {
+
+    suspend operator fun invoke(): Quiz {
+        return quizRepository.getQuiz()
+    }
+}

model/data/src/main/kotlin/dev/adriankuta/kahootquiz/model/data/QuizRepositoryImpl.kt

@@ -0,0 +1,16 @@
+package dev.adriankuta.kahootquiz.model.data
+
+import dev.adriankuta.kahootquiz.core.network.retrofit.QuizApi
+import dev.adriankuta.kahootquiz.domain.models.Quiz
+import dev.adriankuta.kahootquiz.domain.repositories.QuizRepository
+import dev.adriankuta.kahootquiz.model.data.mappers.toDomainModel
+import javax.inject.Inject
+
+internal class QuizRepositoryImpl @Inject constructor(
+    private val quizApi: QuizApi
+) : QuizRepository {
+
+    override suspend fun getQuiz(): Quiz {
+        return quizApi.getQuiz().toDomainModel()
+    }
+}

model/data/src/main/kotlin/dev/adriankuta/kahootquiz/model/data/di/RepositoryModule.kt

@@ -0,0 +1,20 @@
+package dev.adriankuta.kahootquiz.model.data.di
+
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import dev.adriankuta.kahootquiz.domain.repositories.QuizRepository
+import dev.adriankuta.kahootquiz.model.data.QuizRepositoryImpl
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+internal abstract class RepositoryModule {
+
+    @Binds
+    @Singleton
+    abstract fun bindsQuizRepository(
+        quizRepositoryImpl: QuizRepositoryImpl
+    ): QuizRepository
+}

model/data/src/main/kotlin/dev/adriankuta/kahootquiz/model/data/mappers/QuizMapper.kt

@@ -0,0 +1,7 @@
+package dev.adriankuta.kahootquiz.model.data.mappers
+
+import dev.adriankuta.kahootquiz.core.network.models.QuizResponseDto
+import dev.adriankuta.kahootquiz.domain.models.Quiz
+
+internal fun QuizResponseDto.toDomainModel(): Quiz =
+    Quiz(this.uuid ?: "")