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LiHan
LiHan

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[Android] UserListApp - Data Part - Part3

#android #kotlin #api #retrofit

Remote Info

https://random-data-api.com/documentation

Response Data is

Data Type

Create UserDto

Not create all data type .

data class UserDto( val id : Int , val username : String , val gender : String , val phone_number : String , val date_of_birth : String, val email : String, val avatar : String, val address: Address, )
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data class Address( val city: String, val coordinates: Coordinates, val country: String, val state: String, val street_address: String, val street_name: String, val zip_code: String ) data class Coordinates( val lat: Double, val lng: Double )
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Create Remote API Interface UserApi 

interface UserApi { @GET("users") suspend fun getRandomUser() : Response<UserDto> @GET("users") suspend fun getUserBySize( @Query("size") size : String, ) : Response<List<UserDto>> companion object{ const val BASE_URL = "https://random-data-api.com/api/v2/" } }
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Create Mapper 

fun UserDto.toUser() : User { return User( id= id, username = username, gender = gender, phoneNumber = phone_number, dateOfBirth = date_of_birth, email = email, avatar = avatar, lat = address.coordinates.lat, lng = address.coordinates.lng ) }
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Create Custom Result Class Resource.kt 

sealed class Resource<T>(val data : T?=null , val message : String ?=null){ class Loading<T>(data: T? = null) : Resource<T>(data) class Error<T>(data: T? = null , message: String?) : Resource<T>(data,message) class Success<T>(data: T?) : Resource<T>(data) }
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Create Domain Repository UserRepository

這個UserRepository裡面的資料一定是User，因為要在App內使用的
所以在實作那層會有一個Mapper去做轉換(domain>util>UserMapper.kt)

interface UserRepository { suspend fun getRandomUser(): Flow<Resource<User>> suspend fun getUserBySize(size : String) : Flow<Resource<List<User>>> }
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Create Data Repository UserRepositoryImpl 

class UserRepositoryImpl( private val userApi: UserApi ) : UserRepository{ override suspend fun getRandomUser(): Flow<Resource<User>> = flow{ emit(Resource.Loading()) try { val result = userApi.getRandomUser() if (result.isSuccessful){ result.body()?.let { emit( Resource.Success(it.toUser()) ) } }else{ emit( Resource.Error( data = null, message = "${result.errorBody()?.string()}" ) ) } }catch (e : IOException){ emit( Resource.Error( data = null, message = "IOE Error" ) ) } } override suspend fun getUserBySize(size: String): Flow<Resource<List<User>>> = flow{ emit( Resource.Loading() ) try { val result = userApi.getUserBySize(size) if (result.isSuccessful){ result.body()?.let { it.let { emit( Resource.Success( data =it.map { userDto -> userDto.toUser() } ) ) } } }else{ emit( Resource.Error( data = emptyList(), message = result.errorBody()?.string() ) ) } }catch (e : IOException){ emit( Resource.Error( data = null, message = e.message ) ) } } }
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