anitaa1990

plugins {
    alias(libs.plugins.android.application)
    alias(libs.plugins.jetbrains.kotlin.android)
    alias(libs.plugins.compose.compiler)
    alias(libs.plugins.ksp)
    alias(libs.plugins.hilt)
}

android {
    namespace = "com.an.notesapp"

anitaa1990

// Top-level build file where you can add configuration options common to all sub-projects/modules.
plugins {
    alias(libs.plugins.android.application) apply false
    alias(libs.plugins.jetbrains.kotlin.android) apply false
    alias(libs.plugins.compose.compiler) apply false
    alias(libs.plugins.ksp) apply false
    alias(libs.plugins.hilt) apply false
}

anitaa1990

[versions]
agp = "8.7.2"
kotlin = "2.0.21"
coreKtx = "1.15.0"
junit = "4.13.2"
junitVersion = "1.2.1"
espressoCore = "3.6.1"
lifecycleRuntimeKtx = "2.8.7"
activityCompose = "1.9.3"
composeBom = "2024.11.00"

anitaa1990

/**
 * Unit tests for the NewsDataSource class to ensure correct behavior
 * when loading paginated data from the repository.
 */
class NewsDataSourceTest {

    // Mocked repository to simulate API responses.
    private val repository: NewsRepository = mock()
    private val query = "movies" // Query used for testing.
    private val pageSize = 20 // Number of items per page.

anitaa1990

@Composable
fun HomeScreen(
    viewModel: NewsViewModel,
    onItemClicked: (url: String) -> Unit,
    onShareButtonClicked: (url: String) -> Unit
) {
    val news = viewModel.news.collectAsLazyPagingItems()
    val inputText = viewModel.inputText.collectAsState()
    val searchWidgetState by viewModel.searchWidgetState

anitaa1990

@AndroidEntryPoint
class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContent {

            PagingLib3SampleTheme {
                val viewModel: NewsViewModel = hiltViewModel()
                val context = LocalContext.current

anitaa1990

/**
 * ViewModel for managing UI state and business logic related to fetching and displaying paginated news.
 * Uses Paging 3 library and Compose-friendly state management.
 */
@HiltViewModel
class NewsViewModel @Inject constructor(
    private val repository: NewsRepository // Injected repository for fetching news data.
) : ViewModel() {
    // Mutable state flow for managing the search input text.
    private val _inputText: MutableStateFlow<String> = MutableStateFlow("movies") // Default query is "movies".

anitaa1990

class NewsDataSource @Inject constructor (
    private val repository: NewsRepository,
    private val query: String
): PagingSource<Long, Article>() {
  /**
     * Returns the key for the next page to be loaded when refreshing.
     * 
     * This method is used by the Paging library to determine the starting point
     * for loading data when the user performs a refresh action (e.g., swipe-to-refresh).
     * 

anitaa1990

class NewsRepository @Inject constructor(
    private val apiService: NewsApiService
) {
    suspend fun fetchNews(
        query: String,
        nextPage: Long
    ): NewsApiResponse {
        return try {
            apiService.fetchFeed(
                q = query,

anitaa1990

interface NewsApiService {
    /**
     * We would be using the below url:
     * https://newsapi.org/v2/everything?q={query}&apiKey={api}&pageSize={pageSize}&page={page}
     * It has four query parameters: query, apiKey, page & pageSize
     */
    @GET("/v2/everything")
    suspend fun fetchFeed(
        @Query("q") q: String,
        @Query("apiKey") apiKey: String,