Merge branch 'release/3.0'v3.0.0

8 files changed, 728 insertions, 0 deletions

diff --git a/app/src/main/java/xyz/adjutor/aniki/presentation/controller/anime/DetailSearchAnimeController.kt b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/anime/DetailSearchAnimeController.kt
new file mode 100644
index 0000000..3114d01
--- /dev/null
+++ b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/anime/DetailSearchAnimeController.kt
@@ -0,0 +1,63 @@
+package xyz.adjutor.aniki.presentation.controller.anime
+
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import xyz.adjutor.aniki.data.anime.AnimeApi
+import xyz.adjutor.aniki.presentation.model.anime.AnimeResponse
+import xyz.adjutor.aniki.presentation.view.anime.DetailSearchAnimeActivity
+
+class DetailSearchAnimeController {
+
+    lateinit var gson: Gson
+    private lateinit var baseUrl: String //the api's base url
+    lateinit var view: DetailSearchAnimeActivity
+
+    fun onStart(DetailSearchAnimeActivity: DetailSearchAnimeActivity, animeId: String) {
+
+        view = DetailSearchAnimeActivity
+        baseUrl = "https://api.jikan.moe/" //the api's base url
+        gson = GsonBuilder()
+            .setLenient()
+            .create()
+
+        makeApiCall(baseUrl, animeId)
+    }
+
+    private fun makeApiCall(BASE_URL: String, animeId: String) {
+
+        val retrofit = Retrofit.Builder()
+            .baseUrl(BASE_URL)
+            .addConverterFactory(GsonConverterFactory.create(gson))
+            .build()
+
+        val service = retrofit.create(AnimeApi::class.java)
+        val call = service.getAnimeData(animeId) //based on the id
+
+        call.enqueue(object : Callback<AnimeResponse> {
+            override fun onResponse(
+                call: Call<AnimeResponse>,
+                response: Response<AnimeResponse>
+            ) {
+                if (response.isSuccessful && response.body() != null) { //if the code returned is >= 200 and < 300 AND the the body ain't empty
+
+                    val anime = response.body() //getting the AnimeResponse fields
+                    view.showDetail(anime!!)
+
+                } else {
+                    view.showError("API ERROR : is not successful")
+                }
+            }
+
+            override fun onFailure(call: Call<AnimeResponse>, t: Throwable) {
+                view.showError("API ERROR : onFailure")
+            }
+
+        })
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/xyz/adjutor/aniki/presentation/controller/anime/DetailTopAnimeController.kt b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/anime/DetailTopAnimeController.kt
new file mode 100644
index 0000000..6f3cedb
--- /dev/null
+++ b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/anime/DetailTopAnimeController.kt
@@ -0,0 +1,97 @@
+package xyz.adjutor.aniki.presentation.controller.anime
+
+import android.content.Context
+import android.content.SharedPreferences
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import com.google.gson.reflect.TypeToken
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import xyz.adjutor.aniki.data.anime.AnimeApi
+import xyz.adjutor.aniki.presentation.model.anime.AnimeResponse
+import xyz.adjutor.aniki.presentation.view.anime.DetailTopAnimeActivity
+import java.lang.reflect.Type
+
+class DetailTopAnimeController {
+
+    private lateinit var sharedPreferences: SharedPreferences
+    lateinit var gson: Gson
+    private lateinit var baseUrl: String //the api's base url
+    lateinit var view: DetailTopAnimeActivity
+
+    fun onStart(DetailTopAnimeActivity: DetailTopAnimeActivity, animeId: String) {
+
+        view = DetailTopAnimeActivity
+        baseUrl = "https://api.jikan.moe/" //the api's base url
+        gson = GsonBuilder()
+            .setLenient()
+            .create()
+        sharedPreferences =
+            view.applicationContext.getSharedPreferences("sp_anime", Context.MODE_PRIVATE)
+
+        val anime: AnimeResponse? = getDataFromCache(animeId)
+        if (anime != null) {
+            view.showDetail(anime)
+        } else {
+            //taking the API's fields I want and displaying them
+            makeApiCall(baseUrl, animeId)
+        }
+    }
+
+    private fun getDataFromCache(animeId: String): AnimeResponse? {
+        val jsonAnime: String? = sharedPreferences.getString(animeId, null)
+
+        return if (jsonAnime == null) {
+            null
+        } else {
+            val type: Type = object : TypeToken<AnimeResponse>() {}.type
+            gson.fromJson(jsonAnime, type)
+        }
+    }
+
+    private fun makeApiCall(BASE_URL: String, animeId: String) {
+
+        val retrofit = Retrofit.Builder()
+            .baseUrl(BASE_URL)
+            .addConverterFactory(GsonConverterFactory.create(gson))
+            .build()
+
+        val service = retrofit.create(AnimeApi::class.java)
+        val call = service.getAnimeData(animeId) //based on the id
+
+        call.enqueue(object : Callback<AnimeResponse> {
+            override fun onResponse(
+                call: Call<AnimeResponse>,
+                response: Response<AnimeResponse>
+            ) {
+                if (response.isSuccessful && response.body() != null) { //if the code returned is >= 200 and < 300 AND the the body ain't empty
+
+                    val anime = response.body() //getting the AnimeResponse fields
+                    saveList(anime)
+                    view.showDetail(anime!!)
+
+                } else {
+                    view.showError("API ERROR : is not successful")
+                }
+            }
+
+            override fun onFailure(call: Call<AnimeResponse>, t: Throwable) {
+                view.showError("API ERROR : onFailure")
+            }
+
+        })
+    }
+
+    fun saveList(anime: AnimeResponse?) {
+        val jsonString: String = gson.toJson(anime)
+
+        sharedPreferences
+            .edit()
+            .putString(anime?.mal_id.toString(), jsonString)
+            .apply()
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/xyz/adjutor/aniki/presentation/controller/anime/SearchAnimeController.kt b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/anime/SearchAnimeController.kt
new file mode 100644
index 0000000..aa8487e
--- /dev/null
+++ b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/anime/SearchAnimeController.kt
@@ -0,0 +1,73 @@
+package xyz.adjutor.aniki.presentation.controller.anime
+
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import xyz.adjutor.aniki.data.anime.SearchAnimeApi
+import xyz.adjutor.aniki.presentation.model.anime.SearchAnime
+import xyz.adjutor.aniki.presentation.model.anime.SearchAnimeResponse
+import xyz.adjutor.aniki.presentation.view.anime.SearchAnimePage
+
+class SearchAnimeController {
+
+    lateinit var gson: Gson
+    lateinit var baseUrl: String //the api's base url
+    lateinit var view: SearchAnimePage
+
+    fun onStart(searchAnimePage: SearchAnimePage) {
+
+        view = searchAnimePage
+        baseUrl = "https://api.jikan.moe/" //the api's base url
+        gson = GsonBuilder()
+            .setLenient()
+            .create()
+    }
+
+    //call the API and show the list
+    private fun makeApiCall(view: SearchAnimePage, BASE_URL: String, query: String) {
+
+        val retrofit = Retrofit.Builder()
+            .baseUrl(BASE_URL)
+            .addConverterFactory(GsonConverterFactory.create(gson))
+            .build()
+
+        val service = retrofit.create(SearchAnimeApi::class.java)
+        val call =
+            service.getSearchAnimeData(q = query) //fate is an exemple, we'll have to replace it by the user input.
+
+        call.enqueue(object : Callback<SearchAnimeResponse> {
+            override fun onResponse(
+                call: Call<SearchAnimeResponse>,
+                response: Response<SearchAnimeResponse>
+            ) {
+                if (response.isSuccessful && response.body() != null) { //if the code returned is >= 200 and < 300 AND the the body ain't empty
+
+                    val animeList: List<SearchAnime> = response.body()!!
+                        .getResults() //getting the "search" field containing our list of SearchAnimes
+
+                    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<SearchAnimeResponse>, t: Throwable) {
+                view.showError()
+            }
+
+        })
+    }
+
+    fun updateList(userInput: String) {
+        makeApiCall(view, baseUrl, userInput)
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/xyz/adjutor/aniki/presentation/controller/anime/TopAnimeController.kt b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/anime/TopAnimeController.kt
new file mode 100644
index 0000000..7105af5
--- /dev/null
+++ b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/anime/TopAnimeController.kt
@@ -0,0 +1,131 @@
+package xyz.adjutor.aniki.presentation.controller.anime
+
+import android.content.Context
+import android.content.SharedPreferences
+import android.view.View
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import com.google.gson.reflect.TypeToken
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import xyz.adjutor.aniki.data.anime.TopAnimeApi
+import xyz.adjutor.aniki.presentation.model.anime.TopAnime
+import xyz.adjutor.aniki.presentation.model.anime.TopAnimeResponse
+import xyz.adjutor.aniki.presentation.view.anime.TopAnimePage
+import java.lang.reflect.Type
+import kotlin.properties.Delegates
+
+class TopAnimeController {
+
+    lateinit var sharedPreferences: SharedPreferences
+    lateinit var gson: Gson
+    lateinit var baseUrl: String //the api's base url
+    var page by Delegates.notNull<Int>()
+    lateinit var view: TopAnimePage
+
+    fun onStart(topAnimePage: TopAnimePage, viewTopAnimePage: View) {
+
+        view = topAnimePage
+        baseUrl = "https://api.jikan.moe/" //the api's base url
+        page = 1
+        gson = GsonBuilder()
+            .setLenient()
+            .create()
+        sharedPreferences =
+            viewTopAnimePage.context.getSharedPreferences("sp_anime", Context.MODE_PRIVATE)
+
+
+        val animeList: List<TopAnime>? = getDataFromCache()
+        if (animeList != null) {
+            view.showList(viewTopAnimePage, animeList)
+        } else {
+            makeApiCall(view, baseUrl, 1)
+        }
+    }
+
+    fun makeApiCall(view: TopAnimePage, BASE_URL: String, page: Int) {
+
+        val retrofit = Retrofit.Builder()
+            .baseUrl(BASE_URL)
+            .addConverterFactory(GsonConverterFactory.create(gson))
+            .build()
+
+        val service = retrofit.create(TopAnimeApi::class.java)
+        val call = service.getTopAnimeData(page)
+
+        call.enqueue(object : Callback<TopAnimeResponse> {
+            override fun onResponse(
+                call: Call<TopAnimeResponse>,
+                response: Response<TopAnimeResponse>
+            ) {
+                if (response.isSuccessful && response.body() != null) { //if the code returned is >= 200 and < 300 AND the the body ain't empty
+
+                    val animeList: List<TopAnime> = 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<TopAnimeResponse>, t: Throwable) {
+                view.showError()
+            }
+
+        })
+    }
+
+    private fun saveList(animeList: List<TopAnime>) {
+        val jsonString: String = gson.toJson(animeList)
+
+        sharedPreferences
+            .edit()
+            .putString("jsonAnimeList", jsonString)
+            .apply()
+    }
+
+    private fun getDataFromCache(): List<TopAnime>? {
+        //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<List<TopAnime>>() {}.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, baseUrl, 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, baseUrl, page)
+        view.showText("Page $page has been loaded.")
+    }
+
+    fun updateList() {
+        makeApiCall(view, baseUrl, 1)
+        view.showText("Data refreshed")
+        page = 1
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/xyz/adjutor/aniki/presentation/controller/manga/DetailSearchMangaController.kt b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/manga/DetailSearchMangaController.kt
new file mode 100644
index 0000000..a874976
--- /dev/null
+++ b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/manga/DetailSearchMangaController.kt
@@ -0,0 +1,63 @@
+package xyz.adjutor.aniki.presentation.controller.manga
+
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import xyz.adjutor.aniki.data.manga.MangaApi
+import xyz.adjutor.aniki.presentation.model.manga.MangaResponse
+import xyz.adjutor.aniki.presentation.view.manga.DetailSearchMangaActivity
+
+class DetailSearchMangaController {
+
+    lateinit var gson: Gson
+    private lateinit var baseUrl: String //the api's base url
+    lateinit var view: DetailSearchMangaActivity
+
+    fun onStart(DetailSearchMangaActivity: DetailSearchMangaActivity, mangaId: String) {
+
+        view = DetailSearchMangaActivity
+        baseUrl = "https://api.jikan.moe/" //the api's base url
+        gson = GsonBuilder()
+            .setLenient()
+            .create()
+
+        makeApiCall(baseUrl, mangaId)
+    }
+
+    private fun makeApiCall(BASE_URL: String, mangaId: String) {
+
+        val retrofit = Retrofit.Builder()
+            .baseUrl(BASE_URL)
+            .addConverterFactory(GsonConverterFactory.create(gson))
+            .build()
+
+        val service = retrofit.create(MangaApi::class.java)
+        val call = service.getMangaData(mangaId) //based on the id
+
+        call.enqueue(object : Callback<MangaResponse> {
+            override fun onResponse(
+                call: Call<MangaResponse>,
+                response: Response<MangaResponse>
+            ) {
+                if (response.isSuccessful && response.body() != null) { //if the code returned is >= 200 and < 300 AND the the body ain't empty
+
+                    val manga = response.body() //getting the MangaResponse fields
+                    view.showDetail(manga!!)
+
+                } else {
+                    view.showError("API ERROR : is not successful")
+                }
+            }
+
+            override fun onFailure(call: Call<MangaResponse>, t: Throwable) {
+                view.showError("API ERROR : onFailure")
+            }
+
+        })
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/xyz/adjutor/aniki/presentation/controller/manga/DetailTopMangaController.kt b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/manga/DetailTopMangaController.kt
new file mode 100644
index 0000000..807421c
--- /dev/null
+++ b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/manga/DetailTopMangaController.kt
@@ -0,0 +1,97 @@
+package xyz.adjutor.aniki.presentation.controller.manga
+
+import android.content.Context
+import android.content.SharedPreferences
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import com.google.gson.reflect.TypeToken
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import xyz.adjutor.aniki.data.manga.MangaApi
+import xyz.adjutor.aniki.presentation.model.manga.MangaResponse
+import xyz.adjutor.aniki.presentation.view.manga.DetailTopMangaActivity
+import java.lang.reflect.Type
+
+class DetailTopMangaController {
+
+    private lateinit var sharedPreferences: SharedPreferences
+    lateinit var gson: Gson
+    private lateinit var baseUrl: String //the api's base url
+    lateinit var view: DetailTopMangaActivity
+
+    fun onStart(DetailTopMangaActivity: DetailTopMangaActivity, mangaId: String) {
+
+        view = DetailTopMangaActivity
+        baseUrl = "https://api.jikan.moe/" //the api's base url
+        gson = GsonBuilder()
+            .setLenient()
+            .create()
+        sharedPreferences =
+            view.applicationContext.getSharedPreferences("sp_manga", Context.MODE_PRIVATE)
+
+        val manga: MangaResponse? = getDataFromCache(mangaId)
+        if (manga != null) {
+            view.showDetail(manga)
+        } else {
+            //taking the API's fields I want and displaying them
+            makeApiCall(baseUrl, mangaId)
+        }
+    }
+
+    private fun getDataFromCache(mangaId: String): MangaResponse? {
+        val jsonManga: String? = sharedPreferences.getString(mangaId, null)
+
+        return if (jsonManga == null) {
+            null
+        } else {
+            val type: Type = object : TypeToken<MangaResponse>() {}.type
+            gson.fromJson(jsonManga, type)
+        }
+    }
+
+    private fun makeApiCall(BASE_URL: String, mangaId: String) {
+
+        val retrofit = Retrofit.Builder()
+            .baseUrl(BASE_URL)
+            .addConverterFactory(GsonConverterFactory.create(gson))
+            .build()
+
+        val service = retrofit.create(MangaApi::class.java)
+        val call = service.getMangaData(mangaId) //based on the id
+
+        call.enqueue(object : Callback<MangaResponse> {
+            override fun onResponse(
+                call: Call<MangaResponse>,
+                response: Response<MangaResponse>
+            ) {
+                if (response.isSuccessful && response.body() != null) { //if the code returned is >= 200 and < 300 AND the the body ain't empty
+
+                    val manga = response.body() //getting the MangaResponse fields
+                    saveList(manga)
+                    view.showDetail(manga!!)
+
+                } else {
+                    view.showError("API ERROR : is not successful")
+                }
+            }
+
+            override fun onFailure(call: Call<MangaResponse>, t: Throwable) {
+                view.showError("API ERROR : onFailure")
+            }
+
+        })
+    }
+
+    fun saveList(manga: MangaResponse?) {
+        val jsonString: String = gson.toJson(manga)
+
+        sharedPreferences
+            .edit()
+            .putString(manga?.mal_id.toString(), jsonString)
+            .apply()
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/xyz/adjutor/aniki/presentation/controller/manga/SearchMangaController.kt b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/manga/SearchMangaController.kt
new file mode 100644
index 0000000..32e46eb
--- /dev/null
+++ b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/manga/SearchMangaController.kt
@@ -0,0 +1,73 @@
+package xyz.adjutor.aniki.presentation.controller.manga
+
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import xyz.adjutor.aniki.data.manga.SearchMangaApi
+import xyz.adjutor.aniki.presentation.model.manga.SearchManga
+import xyz.adjutor.aniki.presentation.model.manga.SearchMangaResponse
+import xyz.adjutor.aniki.presentation.view.manga.SearchMangaPage
+
+class SearchMangaController {
+
+    lateinit var gson: Gson
+    lateinit var baseUrl: String //the api's base url
+    lateinit var view: SearchMangaPage
+
+    fun onStart(searchMangaPage: SearchMangaPage) {
+
+        view = searchMangaPage
+        baseUrl = "https://api.jikan.moe/" //the api's base url
+        gson = GsonBuilder()
+            .setLenient()
+            .create()
+    }
+
+    //call the API and show the list
+    private fun makeApiCall(view: SearchMangaPage, BASE_URL: String, query: String) {
+
+        val retrofit = Retrofit.Builder()
+            .baseUrl(BASE_URL)
+            .addConverterFactory(GsonConverterFactory.create(gson))
+            .build()
+
+        val service = retrofit.create(SearchMangaApi::class.java)
+        val call =
+            service.getSearchMangaData(q = query) //fate is an exemple, we'll have to replace it by the user input.
+
+        call.enqueue(object : Callback<SearchMangaResponse> {
+            override fun onResponse(
+                call: Call<SearchMangaResponse>,
+                response: Response<SearchMangaResponse>
+            ) {
+                if (response.isSuccessful && response.body() != null) { //if the code returned is >= 200 and < 300 AND the the body ain't empty
+
+                    val mangaList: List<SearchManga> = response.body()!!
+                        .getResults() //getting the "search" field containing our list of SearchMangas
+
+                    view.showList(
+                        view.requireView(),
+                        mangaList
+                    ) //calling the method in charge of displaying on the recyclerview
+
+                } else {
+                    view.showError() //a snackbar
+                }
+            }
+
+            override fun onFailure(call: Call<SearchMangaResponse>, t: Throwable) {
+                view.showError()
+            }
+
+        })
+    }
+
+    fun updateList(userInput: String) {
+        makeApiCall(view, baseUrl, userInput)
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/xyz/adjutor/aniki/presentation/controller/manga/TopMangaController.kt b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/manga/TopMangaController.kt
new file mode 100644
index 0000000..845e750
--- /dev/null
+++ b/app/src/main/java/xyz/adjutor/aniki/presentation/controller/manga/TopMangaController.kt
@@ -0,0 +1,131 @@
+package xyz.adjutor.aniki.presentation.controller.manga
+
+import android.content.Context
+import android.content.SharedPreferences
+import android.view.View
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import com.google.gson.reflect.TypeToken
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import xyz.adjutor.aniki.data.manga.TopMangaApi
+import xyz.adjutor.aniki.presentation.model.manga.TopManga
+import xyz.adjutor.aniki.presentation.model.manga.TopMangaResponse
+import xyz.adjutor.aniki.presentation.view.manga.TopMangaPage
+import java.lang.reflect.Type
+import kotlin.properties.Delegates
+
+class TopMangaController {
+
+    lateinit var sharedPreferences: SharedPreferences
+    lateinit var gson: Gson
+    lateinit var baseUrl: String //the api's base url
+    var page by Delegates.notNull<Int>()
+    lateinit var view: TopMangaPage
+
+    fun onStart(topMangaPage: TopMangaPage, viewTopMangaPage: View) {
+
+        view = topMangaPage
+        baseUrl = "https://api.jikan.moe/" //the api's base url
+        page = 1
+        gson = GsonBuilder()
+            .setLenient()
+            .create()
+        sharedPreferences =
+            viewTopMangaPage.context.getSharedPreferences("sp_manga", Context.MODE_PRIVATE)
+
+
+        val mangaList: List<TopManga>? = getDataFromCache()
+        if (mangaList != null) {
+            view.showList(viewTopMangaPage, mangaList)
+        } else {
+            makeApiCall(view, baseUrl, 1)
+        }
+    }
+
+    private fun makeApiCall(view: TopMangaPage, BASE_URL: String, page: Int) {
+
+        val retrofit = Retrofit.Builder()
+            .baseUrl(BASE_URL)
+            .addConverterFactory(GsonConverterFactory.create(gson))
+            .build()
+
+        val service = retrofit.create(TopMangaApi::class.java)
+        val call = service.getTopMangaData(page)
+
+        call.enqueue(object : Callback<TopMangaResponse> {
+            override fun onResponse(
+                call: Call<TopMangaResponse>,
+                response: Response<TopMangaResponse>
+            ) {
+                if (response.isSuccessful && response.body() != null) { //if the code returned is >= 200 and < 300 AND the the body ain't empty
+
+                    val mangaList: List<TopManga> = response.body()!!
+                        .getResults() //getting the "top" field containing our list of TopMangas
+                    saveList(mangaList)
+                    view.showList(
+                        view.requireView(),
+                        mangaList
+                    ) //calling the method in charge of displaying on the recyclerview
+
+                } else {
+                    view.showError() //a snackbar
+                }
+            }
+
+            override fun onFailure(call: Call<TopMangaResponse>, t: Throwable) {
+                view.showError()
+            }
+
+        })
+    }
+
+    private fun saveList(mangaList: List<TopManga>) {
+        val jsonString: String = gson.toJson(mangaList)
+
+        sharedPreferences
+            .edit()
+            .putString("jsonMangaList", jsonString)
+            .apply()
+    }
+
+    private fun getDataFromCache(): List<TopManga>? {
+        //the value of the mangaList json, if nothing is found, return null
+        val jsonManga: String? = sharedPreferences.getString("jsonMangaList", null)
+
+        //if it's null, well, return null
+        return if (jsonManga == null) {
+            null
+        } else { //else deserialize the list and return it
+            val listType: Type = object : TypeToken<List<TopManga>>() {}.type
+            gson.fromJson(jsonManga, 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, baseUrl, 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, baseUrl, page)
+        view.showText("Page $page has been loaded.")
+    }
+
+    fun updateList() {
+        makeApiCall(view, baseUrl, 1)
+        view.showText("Data refreshed")
+        page = 1
+    }
+
+}
\ No newline at end of file