Grid Challenge API Helper for Android

API.kt

import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.withContext
import okhttp3.OkHttpClient
import okhttp3.Request

suspend fun fetchPhotos(): List<Photo> = withContext(Dispatchers.IO){
  val client = OkHttpClient()

  val request = Request.Builder()
    .url("https://api.unsplash.com/photos?order_by=popular&orientation=squarish&per_page=40")
    .addHeader("Authorization", "Client-ID REPLACE_WITH_ACCESS_KEY")
    .build()

  client.newCall(request).execute().use { response ->
    if (!response.isSuccessful) throw IllegalStateException("Unexpected code $response")

    val body = response.body?.string()
    val photos: List<Photo> = Json{
      ignoreUnknownKeys = true
    }.decodeFromString(body ?: "")

    return@use photos
  }
}

Models.kt

import kotlinx.serialization.*
import kotlinx.serialization.json.*

@Serializable
data class Photo(val id: String, val urls: Urls, val width: Int, val height: Int)

@Serializable
data class Urls(val regular: String)