Use ktor and kotlinx serialization #126
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| package com.fernandocejas.sample | ||
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| import com.fernandocejas.sample.core.navigation.navigationFeature | ||
| import com.fernandocejas.sample.core.network.networkFeature | ||
| import com.fernandocejas.sample.features.auth.authFeature | ||
| import com.fernandocejas.sample.features.login.loginFeature | ||
| import com.fernandocejas.sample.features.movies.di.moviesFeature | ||
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| fun allFeatures() = listOf( | ||
| networkFeature(), | ||
|
There was a problem hiding this comment. I would not make network and navigation a feature. Unless we have a good reason for it. Think of features as user features. Networking and Navigation belong to core, which is the module shared across features. Happy to read your thoughts :) There was a problem hiding this comment. I totally agree about the semantics here. My idea was to break core into independent functionalities like network, etc. If it's too much too early, we can keep core as is and see how it develops? |
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| authFeature(), | ||
| loginFeature(), | ||
| moviesFeature(), | ||
| navigationFeature(), | ||
| ) | ||
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| Original file line number | Diff line number | Diff line change |
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| package com.fernandocejas.sample.core.network | ||
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| import com.fernandocejas.sample.core.functional.Either | ||
| import com.fernandocejas.sample.core.functional.toLeft | ||
| import com.fernandocejas.sample.core.functional.toRight | ||
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| sealed class ApiResponse<out T, out E> { | ||
| /** | ||
| * Represents successful network responses (2xx). | ||
| */ | ||
| data class Success<T>(val body: T) : ApiResponse<T, Nothing>() | ||
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| sealed class Error<E> : ApiResponse<Nothing, E>() { | ||
| /** | ||
| * Represents server (50x) and client (40x) errors. | ||
| */ | ||
| data class HttpError<E>(val code: Int, val errorBody: E?) : Error<E>() | ||
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| /** | ||
| * Represent IOExceptions and connectivity issues. | ||
| */ | ||
| data object NetworkError : Error<Nothing>() | ||
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| /** | ||
| * Represent SerializationExceptions. | ||
| */ | ||
| data object SerializationError : Error<Nothing>() | ||
| } | ||
| } | ||
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| // Side Effect helpers | ||
| inline fun <T, E> ApiResponse<T, E>.onSuccess(block: (T) -> Unit): ApiResponse<T, E> { | ||
| if (this is ApiResponse.Success) { | ||
| block(body) | ||
| } | ||
| return this | ||
| } | ||
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| fun <T, E> ApiResponse<T, E>.toEither(): Either<E?, T> { | ||
| return when (this) { | ||
| is ApiResponse.Success -> body.toRight() | ||
| is ApiResponse.Error.HttpError -> errorBody.toLeft() | ||
| is ApiResponse.Error.NetworkError -> null.toLeft() | ||
| is ApiResponse.Error.SerializationError -> null.toLeft() | ||
| } | ||
| } | ||
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| fun <T, E, F, D> ApiResponse<T, E>.toEither( | ||
| successTransform: (T) -> D, | ||
| errorTransform: (ApiResponse.Error<E>) -> F, | ||
| ): Either<F, D> { | ||
| return when (this) { | ||
| is ApiResponse.Success -> successTransform(body).toRight() | ||
| is ApiResponse.Error -> errorTransform(this).toLeft() | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| package com.fernandocejas.sample.core.network | ||
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| import io.ktor.client.HttpClient | ||
| import io.ktor.client.call.body | ||
| import io.ktor.client.plugins.ClientRequestException | ||
| import io.ktor.client.plugins.ResponseException | ||
| import io.ktor.client.plugins.ServerResponseException | ||
| import io.ktor.client.request.HttpRequestBuilder | ||
| import io.ktor.client.request.request | ||
| import io.ktor.serialization.JsonConvertException | ||
| import kotlinx.io.IOException | ||
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| suspend inline fun <reified T, reified E> HttpClient.safeRequest( | ||
| block: HttpRequestBuilder.() -> Unit, | ||
| ): ApiResponse<T, E> = | ||
| try { | ||
| val response = request { block() } | ||
| ApiResponse.Success(response.body()) | ||
| } catch (e: ClientRequestException) { | ||
| ApiResponse.Error.HttpError(e.response.status.value, e.errorBody()) | ||
| } catch (e: ServerResponseException) { | ||
| ApiResponse.Error.HttpError(e.response.status.value, e.errorBody()) | ||
| } catch (e: IOException) { | ||
| ApiResponse.Error.NetworkError | ||
| } catch (e: JsonConvertException) { | ||
| ApiResponse.Error.SerializationError | ||
| } | ||
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| suspend inline fun <reified E> ResponseException.errorBody(): E? = | ||
| try { | ||
| response.body() | ||
| } catch (e: JsonConvertException) { | ||
| null | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package com.fernandocejas.sample.core.network | ||
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| import co.touchlab.kermit.Logger | ||
| import com.fernandocejas.sample.core.di.Feature | ||
| import io.ktor.client.HttpClient | ||
| import io.ktor.client.engine.okhttp.OkHttp | ||
| import io.ktor.client.plugins.HttpTimeout | ||
| import io.ktor.client.plugins.cache.HttpCache | ||
| import io.ktor.client.plugins.contentnegotiation.ContentNegotiation | ||
| import io.ktor.client.plugins.logging.LogLevel | ||
| import io.ktor.client.plugins.logging.Logging | ||
| import io.ktor.http.ContentType | ||
| import io.ktor.serialization.kotlinx.json.json | ||
| import kotlinx.serialization.json.Json | ||
| import org.koin.core.module.dsl.singleOf | ||
| import org.koin.dsl.module | ||
| import io.ktor.client.plugins.logging.Logger as KtorLogger | ||
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| fun networkFeature() = object : Feature { | ||
|
There was a problem hiding this comment. Since this might not become a feature, the DI part should be rethought then. If do not see any issues to continue having a DI core module that includes all the cross cutting dependencies. |
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| override fun name() = "network" | ||
| override fun diModule() = networkModule | ||
| } | ||
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| private val networkModule = module { | ||
| singleOf(::NetworkHandler) | ||
| single { json } | ||
| single { client } | ||
| } | ||
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| private val json = Json { | ||
| ignoreUnknownKeys = true | ||
| explicitNulls = false | ||
| } | ||
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| private val client = HttpClient(OkHttp) { | ||
| engine { | ||
| config { | ||
| followRedirects(true) | ||
| } | ||
| } | ||
| install(HttpCache) | ||
| install(HttpTimeout) | ||
| install(ContentNegotiation) { | ||
| json(json, ContentType.Text.Plain) | ||
| } | ||
| install(Logging) { | ||
| logger = object : KtorLogger { | ||
| override fun log(message: String) { | ||
| Logger.withTag("HTTP").d { "\uD83C\uDF10 $message" } | ||
| } | ||
| } | ||
| level = LogLevel.HEADERS | ||
| } | ||
| } | ||
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Love this! For a long time wanted to get rid of gson :)