Android Dagger 2 Injecting in Interceptor

Question

I just got a problem to inject repository in the interceptor to get access token when its needed or rather expired. I just don't understand where I did something wrong. I just didn't find any example how to deal with interceptor and repository. Thinking about that double "Retrofit.Builder" maybe this is a problem. What do you think? And let's the code talk:

@Module
class AppModule {

@Singleton
@Provides
fun provideRefreshTokenService(client: OkHttpClient): RefreshTokenApi {
    return Retrofit.Builder()
        .baseUrl("https://id.twitch.tv/oauth2/")
        .client(client)
        .addConverterFactory(GsonConverterFactory.create())
        .build()
        .create(RefreshTokenApi::class.java)
}

@Singleton
@Provides
fun provideHttpClient(headerInterceptor: HeaderInterceptor): OkHttpClient {
    return OkHttpClient.Builder()
        .addNetworkInterceptor(headerInterceptor)
        .build()
}

@Singleton
@Provides
fun provideRetrofit(client: OkHttpClient): TwichApi {
    return Retrofit.Builder()
        .baseUrl("https://api.igdb.com/v4/")
        .client(client)
        .addConverterFactory(GsonConverterFactory.create())
        .build()
        .create(TwichApi::class.java)
}
}


    class TwichHeaderRepository @Inject constructor(
private val refreshTokenApi: RefreshTokenApi) 
 {
        suspend fun fetchRefreshToken(): Response<RefreshToken> {
            return withContext(Dispatchers.IO) {
                refreshTokenApi.getRefreshToken()
            }
        }
    }


private const val TAG = "AddRepositoryAction"
private const val HEADER_CLIENT_ID = "Client-ID"
private const val HEADER_AUTHORIZATION = "Authorization"
private const val HEADER_ACCEPT = "Accept"
private const val DEFAULT_ACCESS_TOKEN = "mjycvndz4sasons2mg990kqme6vu6d"
private const val UNAUTHORIZED_STATUS_CODE = 401

@Singleton
class HeaderInterceptor @Inject constructor(
    private val context: Context,
    private val twichHeaderRepository: TwichHeaderRepository
) : Interceptor {

    override fun intercept(chain: Interceptor.Chain): Response {

        val response = chain.proceed(chain.request().newBuilder().apply {
            header(HEADER_CLIENT_ID, "i3nzc6w3n0pod39zgsq8h445o2yp6p")
            header(HEADER_AUTHORIZATION, "Bearer $DEFAULT_ACCESS_TOKEN")
            header(HEADER_ACCEPT, "application/json")
        }.build())

        val refreshToken = runBlocking { generateAccessToken(twichHeaderRepository) }

        if (response.code == UNAUTHORIZED_STATUS_CODE) {
            response.close()
            val accessToken = ""
            return chain.proceed(chain.request().newBuilder().apply {
                header(HEADER_CLIENT_ID, "i3nzc6w3n0pod39zgsq8h445o2yp6p")
                header(HEADER_AUTHORIZATION, "Bearer $accessToken")
                header(HEADER_ACCEPT, "application/json")
            }.build())
        }
        return response
    }
}

private suspend fun generateAccessToken(twichHeaderRepository: TwichHeaderRepository): String 
{
    val responseRefreshToken = twichHeaderRepository.fetchRefreshToken()

    return responseRefreshToken.body().toString()
}


interface RefreshTokenApi {

    @POST(
       ...
    )
    suspend fun getRefreshToken(
    ): Response<RefreshToken>

}



@Singleton
@Component(modules = [AppModule::class])
interface AppComponent {

    @Component.Factory
    interface Factory {
        fun create(@BindsInstance context: Context): AppComponent
    }

    fun inject(activity: MainActivity)
    fun inject(fragment: AddFragment)
    fun inject(interceptor: HeaderInterceptor)
}



class TwichRepository @Inject constructor(
    private val twichApi: TwichApi
) {
    
    suspend fun searchGames(title: String): Response<Game> {
        return withContext(Dispatchers.IO) { twichApi.getGamesBySearch(title) }
    }
}

Error message is

Found a dependency cycle okhttp3.OkHttpClient is injected at
              com.example.glc.AppModule.provideRefreshTokenService(client)
          com.example.glc.add.RefreshTokenApi is injected at
              com.example.glc.add.TwichHeaderRepository(refreshTokenApi)
          com.example.glc.add.TwichHeaderRepository is injected at
              com.example.glc.add.HeaderInterceptor(�, twichHeaderRepository)
          com.example.glc.add.HeaderInterceptor is injected at
              com.example.glc.AppModule.provideHttpClient(headerInterceptor)
          okhttp3.OkHttpClient is injected at
              com.example.glc.AppModule.provideRetrofit(client)
          com.example.glc.add.TwichApi is injected at
              com.example.glc.add.TwichRepository(twichApi)
          com.example.glc.add.TwichRepository is injected at
              com.example.glc.add.AddViewModel(twichRepository)
          com.example.glc.add.AddViewModel is injected at
              com.example.glc.add.AddFragment.addViewModel
          com.example.glc.add.AddFragment is injected at
              com.example.glc.di.AppComponent.inject(com.example.glc.add.AddFragment)

Answer 1

I just needed to add @Named to resolve my problem and understand it as Mark said in the comment.

@Module

class AppModule {

@Singleton
@Provides
@Named("oauth2")
fun provideAccessTokenHttpClient() = OkHttpClient.Builder().build()

@Singleton
@Provides
fun provideRefreshTokenService(@Named("oauth2") client: OkHttpClient): RefreshTokenApi {
    return Retrofit.Builder()
        .baseUrl("https://id.twitch.tv/oauth2/")
        .client(client)
        .addConverterFactory(GsonConverterFactory.create())
        .build()
        .create(RefreshTokenApi::class.java)
}

@Singleton
@Provides
@Named("igdb")
fun provideSearchDataHttpClient(headerInterceptor: HeaderInterceptor): OkHttpClient {
    return OkHttpClient.Builder()
        .addInterceptor(headerInterceptor)
        .build()
}

@Singleton
@Provides
fun provideRetrofit(@Named("igdb") client: OkHttpClient): TwichApi {
    return Retrofit.Builder()
        .baseUrl("https://api.igdb.com/v4/")
        .client(client)
        .addConverterFactory(GsonConverterFactory.create())
        .build()
        .create(TwichApi::class.java)
}

}