كيفية تكوين Apollo للعمل مع GraphQL في Android

لماذا مقال

ما هو GraphQL

إعداد البيئة

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

classpath 'com.apollographql.apollo:apollo-gradle-plugin:2.0.0'

implementation("com.apollographql.apollo:apollo-runtime:2.0.0")
implementation "com.apollographql.apollo:apollo-android-support:2.0.0"

apply plugin: 'com.apollographql.apollo'

cd /Users/user/Desktop/ProjectName

npm install apollo-codegen

node_modules/.bin/apollo-codegen download-schema https://   api/ --output schema.json

توليد كود النموذج

mutation loginUser($email:String!, $password:String!) {
    login(
        user: {
            email: $email,
            password: $password
        }
    ){
        email,
        token,
        refreshToken
    }
}

query getRoom($room_id: String) {
    room(room_id: $room_id) {
        title,
        room_number,
        cheked_in_family_name,
        has_minibar
    }
}

mutation checkInFamily($room_id: String!, $family_name: String!) {
    room(
        room: {
            title: $family_name,
            room_id: $room_id
        }
    ){
        room_id,
        family_name,
        minibar_products{
            title,
            weight
        }
    }
}

تنفيذ الاستعلام

import com.apollographql.apollo.ApolloClient
import okhttp3.Interceptor
import okhttp3.OkHttpClient
import okhttp3.Request

class NetworkService {

  fun getApolloClient(): ApolloClient {
    val okHttp = OkHttpClient
      .Builder()
      .build()

    return ApolloClient.builder()
      .serverUrl(BASE_URL)
      .okHttpClient(okHttp)
      .build()
  }

  fun getApolloClientWithTokenInterceptor(token: String): ApolloClient {

    val httpClient = OkHttpClient.Builder()
      .addInterceptor(Interceptor { chain: Interceptor.Chain ->
        val original: Request = chain.request()
        
        val builder: Request.Builder = original
          .newBuilder()
          .method(original.method, original.body)
        
        builder.header("Authorization", "Bearer $token")
        return@Interceptor chain.proceed(builder.build())
      })
      .build()

    return ApolloClient.builder()
      .serverUrl(BASE_URL)
      .okHttpClient(httpClient)
      .build()
  }

  companion object {
    private var mInstance: NetworkService? = null

    fun getInstance(): NetworkService? {
      if (mInstance == null) {
        mInstance = NetworkService()
      }
      return mInstance
    }
  }
}

  private fun loginUser() {

    val client = NetworkService.getInstance()?.getApolloClient()
    val loginMutation = LoginUserMutation
      .builder()
      .email(emailEdit.text.toString())
      .password(passwordEdit.text.toString())
      .build()

    client
      ?.mutate(loginMutation)
      ?.enqueue(object : ApolloCall.Callback<LoginUserMutation.Data>() {

        override fun onResponse(response: Response<LoginUserMutation.Data>) {
          if (!response.hasErrors()) {
            val token = response.data?.login()?.token()
            val email = response.data?.login()?.email()
            // ,   ui,     
            runOnUiThread {
              //   ,  
            }
          }
        }

        override fun onFailure(e: ApolloException) {}
      })
  }

  private fun getRoom() {
    val token = "123456"
    val client = NetworkService.getInstance()
      ?.getApolloClientWithTokenIntercetor(token)

    val roomId = "123"
    val allRoomsQuery = GetRoomQuery(Input.fromNullable(roomId))

    client
      ?.query(allRoomsQuery)
      ?.enqueue(object : ApolloCall.Callback<GetRoomQuery.Data>() {

        override fun onResponse(response: Response<GetRoomQuery.Data>) {
          if (!response.hasErrors()) {
            val familyName = response.data?.room()?.family_name()
          }
        }

        override fun onFailure(e: ApolloException) {}
      })
  }