1 files changed, 45 insertions, 11 deletions

diff --git a/app/src/main/java/xyz/adjutor/aniki/topmanga/TopMangaPage.kt b/app/src/main/java/xyz/adjutor/aniki/topmanga/TopMangaPage.kt
index e4cd20d..697ba6f 100644
--- a/app/src/main/java/xyz/adjutor/aniki/topmanga/TopMangaPage.kt
+++ b/app/src/main/java/xyz/adjutor/aniki/topmanga/TopMangaPage.kt
@@ -1,5 +1,7 @@
 package xyz.adjutor.aniki.topmanga
 
+import android.content.Context
+import android.content.SharedPreferences
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -11,15 +13,23 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.google.android.material.snackbar.Snackbar
 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.R
+import java.lang.reflect.Type
 
 class TopMangaPage : Fragment() {
 
+    var sharedPreferences: SharedPreferences? = null
+    val gson = GsonBuilder()
+            .setLenient()
+            .create()
+    var base_url = "https://api.jikan.moe/" //the api's base url
+
     override fun onCreateView(
             inflater: LayoutInflater, container: ViewGroup?,
             savedInstanceState: Bundle?
@@ -27,11 +37,31 @@ class TopMangaPage : Fragment() {
         // Inflate the layout for this fragment
         val view = inflater.inflate(R.layout.top_manga_page, container, false)
 
-        makeApiCall(view, base_url)
+        sharedPreferences = view.context.getSharedPreferences("app_aniki", Context.MODE_PRIVATE)
+
+        val mangaList: List<TopManga>? = getDataFromCache()
+        if(mangaList != null ){
+            showList(view, mangaList)
+        } else {
+            makeApiCall(view, base_url)
+        }
 
         return view
     }
 
+    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
+        if(jsonManga == null) {
+            return null
+        } else { //else deserialize the list and return it
+            val listType: Type = object : TypeToken<List<TopManga>>() {}.type
+            return gson.fromJson(jsonManga, listType)
+        }
+    }
+
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
@@ -50,11 +80,7 @@ class TopMangaPage : Fragment() {
         recyclerView.adapter = TopMangaAdapter(mangaList)
     }
 
-    fun makeApiCall(view: View, BASE_URL: String) {
-
-        val gson = GsonBuilder()
-                .setLenient()
-                .create()
+    private fun makeApiCall(view: View, BASE_URL: String) {
 
         val retrofit = Retrofit.Builder()
                 .baseUrl(BASE_URL)
@@ -67,8 +93,11 @@ class TopMangaPage : Fragment() {
         call.enqueue(object : Callback<RestTopMangaResponse> {
             override fun onResponse(call: Call<RestTopMangaResponse>, response: Response<RestTopMangaResponse>) {
                 if(response.isSuccessful && response.body() != null){ //if the code returned is >= 200 and < 300 AND the the body ain't empty
-                    val mangaList = response.body()!!.getResults() //getting the "top" field containing our list of TopMangas
+
+                    val mangaList: List<TopManga> = response.body()!!.getResults() //getting the "top" field containing our list of TopMangas
+                    saveList(mangaList)
                     showList(view, mangaList) // calling the method in charge of displaying on the recyclerview
+
                 } else {
                     showError() //a snackbar
                 }
@@ -81,13 +110,18 @@ class TopMangaPage : Fragment() {
         })
     }
 
+    private fun saveList(mangaList: List<TopManga>) {
+        val jsonString: String = gson.toJson(mangaList)
+
+        sharedPreferences
+                ?.edit()
+                ?.putString("jsonMangaList", jsonString)
+                ?.apply()
+    }
+
     private fun showError() {
         Snackbar.make(requireView(), "HA? YOU THOUGHT IT WAS AN API !? BUT IT WAS I, ERROR !", Snackbar.LENGTH_LONG)
                 .setAction("Action", null).show()
     }
 
-    companion object {
-        var base_url = "https://api.jikan.moe/" //the api's base url
-    }
-
 }
\ No newline at end of file