feat: Implement fetching project data from the GitHub API

nsh07 · nsh07 · commit b2971c838eec · 2025-10-05T11:51:04.000+05:30
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/network/GitHubApiClient.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/network/GitHubApiClient.kt
@@ -0,0 +1,51 @@
+package org.nsh07.nsh07.network
+
+import io.ktor.client.*
+import io.ktor.client.call.*
+import io.ktor.client.request.*
+import io.ktor.http.*
+import io.ktor.util.network.*
+import kotlinx.serialization.SerializationException
+import org.nsh07.nsh07.util.NetworkError
+import org.nsh07.nsh07.util.Result
+
+class GitHubApiClient(
+    private val client: HttpClient
+) {
+
+    private val url = "https://api.github.com/search/repositories"
+
+    suspend fun getTopRepos(username: String): Result<TopRepos, NetworkError> {
+        val response = try {
+            client.get(url) {
+                header(HttpHeaders.Accept, ContentType.Application.Json.toString())
+
+                parameter("q", "user:$username")
+                parameter("sort", "stars")
+                parameter("order", "desc")
+                parameter("per_page", "5")
+            }
+        } catch (_: UnresolvedAddressException) {
+            return Result.Error(NetworkError.NO_INTERNET)
+        } catch (_: SerializationException) {
+            return Result.Error(NetworkError.SERIALIZATION)
+        }
+
+        return when (response.status.value) {
+            in 200..299 -> {
+                val topRepos = response.body<TopRepos>()
+                Result.Success(topRepos)
+            }
+
+            401 -> Result.Error(NetworkError.UNAUTHORIZED)
+            409 -> Result.Error(NetworkError.CONFLICT)
+            408 -> Result.Error(NetworkError.REQUEST_TIMEOUT)
+            413 -> Result.Error(NetworkError.PAYLOAD_TOO_LARGE)
+            429 -> Result.Error(NetworkError.TOO_MANY_REQUESTS)
+            in 500..599 -> Result.Error(NetworkError.SERVER_ERROR)
+
+            else -> Result.Error(NetworkError.UNKNOWN)
+        }
+    }
+
+}
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/network/License.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/network/License.kt
@@ -1,4 +1,4 @@
-package org.nsh07.nsh07.ui.network
+package org.nsh07.nsh07.network
 
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/network/Owner.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/network/Owner.kt
@@ -1,4 +1,4 @@
-package org.nsh07.nsh07.ui.network
+package org.nsh07.nsh07.network
 
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/network/Repo.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/network/Repo.kt
@@ -1,4 +1,4 @@
-package org.nsh07.nsh07.ui.network
+package org.nsh07.nsh07.network
 
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
@@ -105,8 +105,6 @@ data class Repo(
     val mergesUrl: String,
     @SerialName("milestones_url")
     val milestonesUrl: String,
-    @SerialName("mirror_url")
-    val mirrorUrl: Any?,
     @SerialName("name")
     val name: String,
     @SerialName("node_id")
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/network/TopRepos.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/network/TopRepos.kt
@@ -1,4 +1,4 @@
-package org.nsh07.nsh07.ui.network
+package org.nsh07.nsh07.network
 
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/network/createHttpClient.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/network/createHttpClient.kt
@@ -0,0 +1,25 @@
+package org.nsh07.nsh07.network
+
+import io.ktor.client.*
+import io.ktor.client.plugins.*
+import io.ktor.client.plugins.contentnegotiation.*
+import io.ktor.client.request.*
+import io.ktor.http.*
+import io.ktor.serialization.kotlinx.json.*
+import kotlinx.serialization.json.Json
+
+fun createHttpClient(): HttpClient {
+    return HttpClient {
+        install(ContentNegotiation) {
+            json(
+                Json {
+                    ignoreUnknownKeys = true
+                }
+            )
+        }
+        install(DefaultRequest) {
+            header("X-GitHub-Api-Version", "2022-11-28")
+            header(HttpHeaders.UserAgent, "nsh07.github.io/1.0.0 (nishant.28@outlook.com) ktor/3.3.0")
+        }
+    }
+}
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/ui/AppScreen.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/ui/AppScreen.kt
@@ -2,13 +2,21 @@ package org.nsh07.nsh07.ui
 
 import androidx.compose.material3.windowsizeclass.ExperimentalMaterial3WindowSizeClassApi
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
+import org.nsh07.nsh07.network.GitHubApiClient
+import org.nsh07.nsh07.network.createHttpClient
 import org.nsh07.nsh07.ui.homeScreen.AppHomeScreen
 
 @OptIn(ExperimentalMaterial3WindowSizeClassApi::class)
 @Composable
 fun AppScreen(
+    viewModel: UiViewModel = remember { UiViewModel(GitHubApiClient(createHttpClient())) },
     modifier: Modifier = Modifier
 ) {
-    AppHomeScreen(modifier)
+    val projectsState by viewModel.projectsState.collectAsState()
+
+    AppHomeScreen(projectsState, modifier)
 }
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/ui/UiViewModel.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/ui/UiViewModel.kt
@@ -0,0 +1,48 @@
+package org.nsh07.nsh07.ui
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import org.nsh07.nsh07.network.GitHubApiClient
+import org.nsh07.nsh07.ui.homeScreen.ProjectsState
+import org.nsh07.nsh07.util.onError
+import org.nsh07.nsh07.util.onSuccess
+
+class UiViewModel(
+    private val githubClient: GitHubApiClient
+) : ViewModel() {
+    private val _projectsState = MutableStateFlow(ProjectsState())
+    val projectsState: StateFlow<ProjectsState> = _projectsState.asStateFlow()
+
+    init {
+        loadProjects()
+    }
+
+    fun loadProjects() {
+        viewModelScope.launch {
+            githubClient.getTopRepos("nsh07")
+                .onSuccess {
+                    _projectsState.update { currentState ->
+                        currentState.copy(
+                            isLoading = false,
+                            error = null,
+                            projects = it.repos
+                        )
+                    }
+                }
+                .onError {
+                    _projectsState.update { currentState ->
+                        currentState.copy(
+                            isLoading = false,
+                            error = it.name,
+                            projects = emptyList()
+                        )
+                    }
+                }
+        }
+    }
+}
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/ui/homeScreen/AppHomeScreen.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/ui/homeScreen/AppHomeScreen.kt
@@ -25,7 +25,10 @@ import nsh07.composeapp.generated.resources.*
 import org.jetbrains.compose.resources.painterResource
 
 @Composable
-fun AppHomeScreen(modifier: Modifier = Modifier) {
+fun AppHomeScreen(
+    projectState: ProjectsState,
+    modifier: Modifier = Modifier
+) {
     val uriHandler = LocalUriHandler.current
     val scope = rememberCoroutineScope()
 
@@ -187,6 +190,14 @@ fun AppHomeScreen(modifier: Modifier = Modifier) {
                 }
                 Spacer(Modifier.height(112.dp))
             }
+            items(projectState.projects, key = { it.id }) {
+                ProjectCard(
+                    project = it,
+                    cardPadding = cardPadding,
+                    projectImageUri = "",
+                    modifier = Modifier.padding(bottom = 32.dp)
+                )
+            }
             item("work in progress") {
                 Column(
                     horizontalAlignment = Alignment.CenterHorizontally,
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/ui/homeScreen/ProjectCard.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/ui/homeScreen/ProjectCard.kt
@@ -28,8 +28,8 @@ fun ProjectCard(
     project: Repo,
     cardPadding: Dp,
     projectImageUri: String,
-    projectDescription: String,
-    modifier: Modifier = Modifier
+    modifier: Modifier = Modifier,
+    projectDescription: String? = null
 ) {
     val colorScheme = colorScheme
     val uriHandler = LocalUriHandler.current
@@ -56,7 +56,7 @@ fun ProjectCard(
                     )
                 }
                 Text(
-                    projectDescription,
+                    projectDescription ?: project.description,
                     style = typography.bodyMedium,
                     color = colorScheme.onSurfaceVariant,
                     modifier = Modifier.padding(top = 8.dp)
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/ui/homeScreen/ProjectsState.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/ui/homeScreen/ProjectsState.kt
@@ -0,0 +1,11 @@
+package org.nsh07.nsh07.ui.homeScreen
+
+import androidx.compose.runtime.Immutable
+import org.nsh07.nsh07.network.Repo
+
+@Immutable
+data class ProjectsState(
+    val isLoading: Boolean = false,
+    val projects: List<Repo> = emptyList(),
+    val error: String? = null
+)
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/util/NetworkError.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/util/NetworkError.kt
@@ -0,0 +1,15 @@
+package org.nsh07.nsh07.util
+
+interface Error
+
+enum class NetworkError : Error {
+    REQUEST_TIMEOUT,
+    UNAUTHORIZED,
+    CONFLICT,
+    TOO_MANY_REQUESTS,
+    NO_INTERNET,
+    PAYLOAD_TOO_LARGE,
+    SERVER_ERROR,
+    SERIALIZATION,
+    UNKNOWN;
+}
diff --git a/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/util/Result.kt b/composeApp/src/wasmJsMain/kotlin/org/nsh07/nsh07/util/Result.kt
@@ -0,0 +1,41 @@
+package org.nsh07.nsh07.util
+
+
+sealed interface Result<out D, out E : Error> {
+    data class Success<out D>(val data: D) : Result<D, Nothing>
+    data class Error<out E : org.nsh07.nsh07.util.Error>(val error: E) : Result<Nothing, E>
+}
+
+inline fun <T, E : Error, R> Result<T, E>.map(map: (T) -> R): Result<R, E> {
+    return when (this) {
+        is Result.Error -> Result.Error(error)
+        is Result.Success -> Result.Success(map(data))
+    }
+}
+
+fun <T, E : Error> Result<T, E>.asEmptyDataResult(): EmptyResult<E> {
+    return map { }
+}
+
+inline fun <T, E : Error> Result<T, E>.onSuccess(action: (T) -> Unit): Result<T, E> {
+    return when (this) {
+        is Result.Error -> this
+        is Result.Success -> {
+            action(data)
+            this
+        }
+    }
+}
+
+inline fun <T, E : Error> Result<T, E>.onError(action: (E) -> Unit): Result<T, E> {
+    return when (this) {
+        is Result.Error -> {
+            action(error)
+            this
+        }
+
+        is Result.Success -> this
+    }
+}
+
+typealias EmptyResult<E> = Result<Unit, E>

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-package org.nsh07.nsh07.ui.network`
	`1`	`+package org.nsh07.nsh07.network`
`2`	`2`
`3`	`3`	`import kotlinx.serialization.SerialName`
`4`	`4`	`import kotlinx.serialization.Serializable`