Add pokemon client

shared/src/commonMain/kotlin/com/mocoding/pokedex/core/di/AppModule.kt

@@ -1,7 +1,7 @@
 package com.mocoding.pokedex.core.di
 
 import com.mocoding.pokedex.core.database.databaseModule
-import com.mocoding.pokedex.core.network.networkModule
+import com.mocoding.pokedex.core.network.di.networkModule
 import org.koin.core.context.startKoin
 import org.koin.dsl.KoinAppDeclaration
 

shared/src/commonMain/kotlin/com/mocoding/pokedex/core/network/NetworkConstants.kt

@@ -0,0 +1,10 @@
+package com.mocoding.pokedex.core.network
+
+object NetworkConstants {
+ const val baseUrl = "https://pokeapi.co/api/v2/"
+
+ object Pokemon {
+ const val route = baseUrl + "pokemon"
+ val byName: (String) -> String = { name -> "$route/$name"}
+ }
+}

shared/src/commonMain/kotlin/com/mocoding/pokedex/core/network/client/PokemonClient.kt

@@ -0,0 +1,41 @@
+package com.mocoding.pokedex.core.network.client
+
+import com.mocoding.pokedex.core.network.NetworkConstants
+import com.mocoding.pokedex.core.network.helper.handleErrors
+import io.ktor.client.HttpClient
+import io.ktor.client.request.get
+import io.ktor.http.ContentType
+import io.ktor.http.contentType
+import org.koin.core.component.KoinComponent
+import org.koin.core.component.inject
+
+class PokemonClient: KoinComponent {
+
+ private val httpClient by inject<HttpClient>()
+
+ suspend fun getPokemonList(
+ limit: Int = 20,
+ offset: Int = 0
+ ): String {
+ return handleErrors {
+ httpClient.get(NetworkConstants.Pokemon.route) {
+ url {
+ parameters.append("limit", limit.toString())
+ parameters.append("offset", offset.toString())
+ }
+ contentType(ContentType.Application.Json)
+ }
+ }
+ }
+
+ suspend fun getPokemonByName(
+ name: String,
+ ): String {
+ return handleErrors {
+ httpClient.get(NetworkConstants.Pokemon.byName(name)) {
+ contentType(ContentType.Application.Json)
+ }
+ }
+ }
+
+}

shared/src/commonMain/kotlin/com/mocoding/pokedex/core/network/di/NetworkModule.kt

@@ -0,0 +1,12 @@
+package com.mocoding.pokedex.core.network.di
+
+import com.mocoding.pokedex.core.network.client.PokemonClient
+import com.mocoding.pokedex.core.network.createHttpClient
+import io.ktor.client.HttpClient
+import org.koin.core.module.dsl.singleOf
+import org.koin.dsl.module
+
+val networkModule = module {
+ singleOf<HttpClient> { createHttpClient() }
+ singleOf<PokemonClient> { PokemonClient() }
+}

shared/src/commonMain/kotlin/com/mocoding/pokedex/core/network/errors/PokedexException.kt

@@ -0,0 +1,12 @@
+package com.mocoding.pokedex.core.network.errors
+
+enum class PokedexError {
+ ServiceUnavailable,
+ ClientError,
+ ServerError,
+ UnknownError
+}
+
+class PokedexException(error: PokedexError): Exception(
+ "Something goes wrong: $error"
+)

shared/src/commonMain/kotlin/com/mocoding/pokedex/core/network/helper/ErrorHandler.kt

@@ -0,0 +1,28 @@
+package com.mocoding.pokedex.core.network.helper
+
+import com.mocoding.pokedex.core.network.errors.PokedexError
+import com.mocoding.pokedex.core.network.errors.PokedexException
+import io.ktor.client.call.body
+import io.ktor.client.statement.HttpResponse
+import io.ktor.utils.io.errors.IOException
+
+suspend inline fun <reified T> handleErrors(response: () -> HttpResponse): T {
+ val result = try {
+ response()
+ } catch(e: IOException) {
+ throw PokedexException(PokedexError.ServiceUnavailable)
+ }
+
+ when(result.status.value) {
+ in 200..299 -> Unit
+ in 400..499 -> throw PokedexException(PokedexError.ClientError)
+ 500 -> throw PokedexException(PokedexError.ServerError)
+ else -> throw PokedexException(PokedexError.UnknownError)
+ }
+
+ return try {
+ result.body()
+ } catch(e: Exception) {
+ throw PokedexException(PokedexError.ServerError)
+ }
+}