package xyz.adjutor.aniki.presentation.controller import android.content.Context import android.content.SharedPreferences import android.view.View import com.google.gson.reflect.TypeToken import retrofit2.Call import retrofit2.Callback import retrofit2.Response import xyz.adjutor.aniki.presentation.Singletons import xyz.adjutor.aniki.presentation.Singletons.Companion.gson import xyz.adjutor.aniki.presentation.model.TopAnime import xyz.adjutor.aniki.presentation.model.response.TopAnimeResponse import xyz.adjutor.aniki.presentation.view.fragment.TopAnimeFragment import java.lang.reflect.Type import kotlin.properties.Delegates class TopAnimeController { private lateinit var sharedPreferences: SharedPreferences private var page by Delegates.notNull() lateinit var view: TopAnimeFragment fun onStart(topAnimeFragment: TopAnimeFragment, viewTopAnimePage: View) { view = topAnimeFragment page = 1 sharedPreferences = viewTopAnimePage.context.getSharedPreferences("sp_anime", Context.MODE_PRIVATE) val animeList: List? = getDataFromCache() if (animeList != null) { view.showList(viewTopAnimePage, animeList) } else { makeApiCall(view, 1) } } private fun makeApiCall(view: TopAnimeFragment, page: Int) { Singletons .topAnimeApi .getTopAnimeData(page) .enqueue(object : Callback { override fun onResponse( call: Call, response: Response ) { if (response.isSuccessful && response.body() != null) { //if the code returned is >= 200 and < 300 AND the the body ain't empty val animeList: List = response.body()!! .getResults() //getting the "top" field containing our list of TopAnimes saveList(animeList) view.showList( view.requireView(), animeList ) //calling the method in charge of displaying on the recyclerview } else { view.showError() //a snackbar } } override fun onFailure(call: Call, t: Throwable) { view.showError() } }) } private fun saveList(animeList: List) { val jsonString: String = gson.toJson(animeList) sharedPreferences .edit() .putString("jsonAnimeList", jsonString) .apply() } private fun getDataFromCache(): List? { //the value of the animeList json, if nothing is found, return null val jsonAnime: String? = sharedPreferences.getString("jsonAnimeList", null) //if it's null, well, return null return if (jsonAnime == null) { null } else { //else deserialize the list and return it val listType: Type = object : TypeToken>() {}.type gson.fromJson(jsonAnime, listType) } } fun onButtonPrevClick() { if (page > 1) { // if we're not on the first page, because we can't go back if we're on the first one. page -= 1 makeApiCall(view, page) view.showText("Page $page has been loaded.") } else { view.showText("You're already on page 1. (If you're actually not, refresh the list.)") } } fun onButtonNextClick() { page += 1 makeApiCall(view, page) view.showText("Page $page has been loaded.") } fun updateList() { makeApiCall(view, 1) view.showText("Data refreshed") page = 1 } }