Add deleteAllData

app/src/main/java/com/schoolapp/cleverclass/DSBDownloader.kt

@@ -201,20 +201,6 @@ private fun createDataFolder(context: Context) : File {
     return folder
 }
 
-private fun clearFolder(directory: File) {
-    if (directory.exists()) {
-        val files = directory.listFiles()
-        if (files != null) {
-            for (file in files) {
-                if (file.isDirectory) {
-                    clearFolder(file)
-                }
-                file.delete()
-            }
-        }
-    }
-}
-
 private fun isInternetAvailable(context: Context): Boolean {
     val connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
     val network = connectivityManager.activeNetwork

app/src/main/java/com/schoolapp/cleverclass/SettingsActivity.kt

@@ -24,6 +24,7 @@ import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Divider
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
@@ -35,8 +36,10 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
@@ -64,6 +67,10 @@ fun SettingsContent(activity: ComponentActivity) {
     val sharedPreferences = activity.getSharedPreferences("Settings", Context.MODE_PRIVATE)
     val editor = sharedPreferences.edit()
 
+    var showDeleteConfirmation by remember {
+        mutableStateOf(false)
+    }
+
     Column(modifier = Modifier.fillMaxSize()) {
         // Top AppBar
         TopAppBar(
@@ -94,7 +101,6 @@ fun SettingsContent(activity: ComponentActivity) {
                 .weight(1f)
                 .verticalScroll(rememberScrollState())
                 .fillMaxWidth()
-
         ) {
             Setting(text = "Stundenplan", sharedPreferences, editor)
             Setting(text = "Noten", sharedPreferences, editor)
@@ -102,6 +108,7 @@ fun SettingsContent(activity: ComponentActivity) {
             Setting(text = "Mebis", sharedPreferences, editor)
             Setting(text = "DSBmobile", sharedPreferences, editor)
             Spacer(modifier = Modifier.height(16.dp))
+
             Divider()
             Box(
                 modifier = Modifier
@@ -120,6 +127,19 @@ fun SettingsContent(activity: ComponentActivity) {
                     modifier = Modifier.padding(16.dp)
                 )
             }
+            Divider()
+            Box(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .clickable { showDeleteConfirmation = true }
+            ) {
+                Text(
+                    text = "Alle Daten löschen",
+                    color = MaterialTheme.colorScheme.onBackground,
+                    style = MaterialTheme.typography.labelMedium,
+                    modifier = Modifier.padding(16.dp)
+                )
+            }
         }
 
         // About Button
@@ -150,6 +170,43 @@ fun SettingsContent(activity: ComponentActivity) {
             Spacer(modifier = Modifier.height(8.dp))
         }
     }
+
+    if(showDeleteConfirmation){
+        AlertDialog(
+            onDismissRequest = { showDeleteConfirmation = false },
+            text = {
+                Text(
+                    text = "Möchten Sie wirklich alle Daten aus dieser App löschen?\n" +
+                            "Dieser Vorgang kann nicht rückgängig gemacht werden.",
+                    color = MaterialTheme.colorScheme.onPrimaryContainer,
+                    style = MaterialTheme.typography.labelMedium
+                )
+            },
+            confirmButton = {
+                Row(modifier = Modifier.fillMaxWidth()){
+                    Text(
+                        text = "Löschen",
+                        color = MaterialTheme.colorScheme.secondary,
+                        style = MaterialTheme.typography.labelMedium,
+                        modifier = Modifier.clickable {
+                            deleteAllData(activity)
+                            showDeleteConfirmation = false
+                        }
+                    )
+
+                    Spacer(modifier = Modifier.weight(1f))
+
+                    Text(
+                        text = "Abbrechen",
+                        color = MaterialTheme.colorScheme.secondary,
+                        style = MaterialTheme.typography.labelMedium,
+                        modifier = Modifier.clickable { showDeleteConfirmation = false }
+                    )
+                }
+            },
+            containerColor = MaterialTheme.colorScheme.primaryContainer
+        )
+    }
 }
 
 @Composable

app/src/main/java/com/schoolapp/cleverclass/Utilities.kt

@@ -1,5 +1,9 @@
 package com.schoolapp.cleverclass
 
+import android.app.Activity
+import android.content.Context
+import android.content.Intent
+import androidx.activity.ComponentActivity
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -17,6 +21,10 @@ import androidx.compose.ui.graphics.ColorFilter
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.unit.dp
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import java.io.File
 
 
 const val NO_INTERNET_CONNECTION_CODE = -1
@@ -63,4 +71,47 @@ fun StaticLoadingScreen(){
             )
         }
     }
+}
+
+fun deleteAllData(activity: ComponentActivity){
+    val sharedPrefs = listOf("Settings", "DSBmobile", "gradeAverages", "TimeTable")
+    for (prefName in sharedPrefs) {
+        val sharedPreferences = activity.getSharedPreferences(prefName, Context.MODE_PRIVATE)
+        val editor = sharedPreferences.edit()
+        editor.clear()
+        editor.apply()
+    }
+
+    clearFolder(activity.filesDir)
+    clearFolder(activity.cacheDir)
+
+    CoroutineScope(Dispatchers.Main).launch {
+        restartApp(activity)
+    }
+}
+
+fun clearFolder(directory: File) {
+    if (directory.exists()) {
+        val files = directory.listFiles()
+        if (files != null) {
+            for (file in files) {
+                if (file.isDirectory) {
+                    clearFolder(file)
+                }
+                file.delete()
+            }
+        }
+    }
+}
+
+fun restartApp(context: Context) {
+    val packageManager = context.packageManager
+    val intent = packageManager.getLaunchIntentForPackage(context.packageName)
+    intent?.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
+    intent?.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+    context.startActivity(intent)
+    if (context is Activity) {
+        context.finish()
+    }
+    Runtime.getRuntime().exit(0)
 }