Add automatic refreshing games list

app/src/main/java/emu/skyline/MainActivity.kt

@@ -351,5 +351,7 @@ class MainActivity : AppCompatActivity() {
             setAppListDecoration()
             adapter.notifyItemRangeChanged(0, adapter.currentItems.size)
         }
+
+        viewModel.checkRomHash(Uri.parse(appSettings.searchLocation), EmulationSettings.global.systemLanguage)
     }
 }

app/src/main/java/emu/skyline/MainViewModel.kt

@@ -11,12 +11,12 @@ import emu.skyline.loader.AppEntry
 import emu.skyline.loader.RomFormat
 import emu.skyline.utils.fromFile
 import emu.skyline.utils.toFile
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import java.io.File
 import java.util.*
 import javax.inject.Inject
-import kotlin.collections.HashMap
 
 sealed class MainState {
     object Loading : MainState()
@@ -73,4 +73,19 @@ class MainViewModel @Inject constructor(@ApplicationContext context : Context, p
             }
         }
     }
+
+    /**
+     * This checks if the roms have changed since the last time they were loaded and if so it reloads them
+     */
+    fun checkRomHash(searchLocation : Uri, systemLanguage : Int) {
+        if(state !is MainState.Loaded) return
+        CoroutineScope(Dispatchers.IO).launch {
+            val currentHash = (state as MainState.Loaded).items.hashCode()
+            val romElements = romProvider.loadRoms(searchLocation, systemLanguage)
+            val newHash = romElements.hashCode()
+            if (newHash != currentHash) {
+                state = MainState.Loaded(romElements)
+            }
+        }
+    }
 }