Started StundenplanActivity

began with the implementation of sharedPreferences
added LessonStoreManager
added TimeTableSetupActivity (-> + entries in the AndroidManifest.xml & strings.xml)
committed version of "Stundenplan" is unfinished and malfunctional (switching to Laptop for holidays)

app/src/main/AndroidManifest.xml

@@ -40,6 +40,11 @@
             android:exported="false"
             android:label="@string/title_activity_noten"
             android:theme="@style/Theme.CleverClass" />
+        <activity
+            android:name=".TimeTableSetupActivity"
+            android:exported="false"
+            android:label="@string/title_activity_timetable_setup"
+            android:theme="@style/Theme.CleverClass" />
         <activity
             android:name=".StundenplanActivity"
             android:exported="false"

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

@@ -0,0 +1,31 @@
+package com.schoolapp.cleverclass
+
+import android.content.Context
+import androidx.datastore.core.DataStore
+import androidx.datastore.preferences.core.Preferences
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.stringPreferencesKey
+import androidx.datastore.preferences.preferencesDataStore
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+
+object LessonStoreManager {
+    private val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = "lesson_preferences")
+
+    suspend fun saveLessons(context: Context, lessons: List<LessonData>, day: String) {
+        context.dataStore.edit { preferences ->
+            val json = Gson().toJson(lessons)
+            preferences[stringPreferencesKey(day)] = json
+        }
+    }
+
+    fun getLessons(context: Context, day: String): Flow<List<LessonData>> {
+        return context.dataStore.data.map { preferences ->
+            val json = preferences[stringPreferencesKey(day)] ?: return@map emptyList()
+            val type = object : TypeToken<List<LessonData>>() {}.type
+            Gson().fromJson(json, type)
+        }
+    }
+}

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

@@ -1,11 +1,15 @@
 package com.schoolapp.cleverclass
 
+import android.content.Context
+import android.content.Intent
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowBack
@@ -18,19 +22,47 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+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.platform.LocalContext
 import androidx.compose.ui.unit.dp
+import com.schoolapp.cleverclass.LessonStoreManager.getLessons
 import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+
+private val listOfDays = listOf("mon", "tue", "wed", "thu", "fri", "sat", "sun")
+private val lessonGrabberIndex = 0
 
 class StundenplanActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+
+        val sharedPreferences = this.getSharedPreferences("TimeTable", Context.MODE_PRIVATE)
+        val maxLessons = sharedPreferences.getString("maxLessons", "").toString()
+        val lessonLength = sharedPreferences.getString("lessonLength", "").toString()
+
         setContent {
             CleverClassTheme {
                 Surface(
                     modifier = Modifier.fillMaxSize(),
                     color = MaterialTheme.colorScheme.background
                 ) {
+                    println(maxLessons)
+                    //println(lessonLength)
+                    if (maxLessons.isEmpty() || lessonLength.isEmpty()) {
+                        val intent = Intent(this@StundenplanActivity, TimeTableSetupActivity::class.java).apply {
+                            putExtra(TimeTableSetupActivity.TYPE_KEY, "FirstSetup")
+                        }
+                        startActivity(intent)
+                    }
+
                     StundenplanContent(activity = this)
                 }
             }
@@ -64,7 +96,46 @@ fun StundenplanContent(activity: ComponentActivity){
         )
 
         Column() {
-
+            listOfDays.forEach() {currentDay ->
+                Day(currentDay)
+            }
         }
     }
 }
+
+data class LessonData(
+    val subject: String,
+    val teacher: String,
+    val room: String
+)
+
+@Composable
+fun Day(day: String) {
+    var lessons = emptyList<LessonData>()
+    val context = LocalContext.current
+    Column {
+        LaunchedEffect(lessons, context) {
+            getLessons(context, day).collect { savedLessons ->
+                lessons = savedLessons.toMutableList()
+            }
+        }
+        lessons.forEach() {
+            Lesson(subject = it.subject, teacher = it.teacher, room = it.room)
+        }
+    }
+}
+
+@Composable
+fun Lesson(subject: String, teacher: String, room: String) {
+    Box(modifier = Modifier
+        .size(200.dp, 100.dp)
+        .padding(3.dp)
+    ) {
+        Text(modifier = Modifier.align(Alignment.Center),
+            text = "$subject\n@$room\n/w$teacher")
+    }
+}
+
+fun currentDay(): String {
+    return "hi"
+}

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

@@ -0,0 +1,316 @@
+package com.schoolapp.cleverclass
+
+import android.content.Context
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.text.selection.TextSelectionColors
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material.icons.outlined.Delete
+import androidx.compose.material.icons.outlined.Info
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextFieldDefaults
+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.graphics.Color
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.text.input.VisualTransformation
+import androidx.compose.ui.unit.dp
+import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
+import com.schoolapp.cleverclass.ui.theme.InputPrimaryColor
+import com.schoolapp.cleverclass.ui.theme.InputSecondaryColor
+
+private lateinit var activityType : String
+
+class TimeTableSetupActivity : ComponentActivity() {
+    companion object{
+        const val TYPE_KEY = "type_key"
+    }
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        activityType = intent.getStringExtra(TYPE_KEY).toString()
+
+        setContent {
+            CleverClassTheme {
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background
+                ) {
+                    TimeTableSetupContent(activity = this)
+                }
+            }
+        }
+    }
+}
+
+
+// Content of TimeTableSetup
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun TimeTableSetupContent(activity: ComponentActivity){
+    val inputFieldColors = TextFieldDefaults.outlinedTextFieldColors(
+        textColor = MaterialTheme.colorScheme.onPrimaryContainer,
+        containerColor = MaterialTheme.colorScheme.secondaryContainer,
+        cursorColor = InputPrimaryColor,
+        selectionColors = TextSelectionColors(
+            handleColor = InputPrimaryColor,
+            backgroundColor = InputSecondaryColor
+        ),
+        focusedBorderColor = InputSecondaryColor,
+        unfocusedBorderColor = Color.Transparent
+    )
+
+    val sharedPreferences = activity.getSharedPreferences("TimeTable", Context.MODE_PRIVATE)
+    val editor = sharedPreferences.edit()
+
+    var maxLessons by remember {
+        mutableStateOf(sharedPreferences.getString("maxLessons", "-1").toString())
+    }
+    var lessonLength by remember {
+        mutableStateOf(sharedPreferences.getString("lessonLength", "-1").toString())
+    }
+    var showPassword by remember {
+        mutableStateOf(false)
+    }
+
+    var showInfo by remember {
+        mutableStateOf(false)
+    }
+    var showDeleteConfirmation by remember {
+        mutableStateOf(false)
+    }
+
+    Column {
+        TopAppBar(
+            colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.primaryContainer),
+            title = { Text(text = "") },
+            navigationIcon = {
+                IconButton(onClick = { activity.finish() }) {
+                    Icon(
+                        imageVector = Icons.Filled.ArrowBack,
+                        contentDescription = null,
+                        modifier = Modifier.size(28.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer
+                    )
+                }
+            },
+            modifier = Modifier.fillMaxWidth()
+        )
+
+        Column(
+            verticalArrangement = Arrangement.Center,
+            modifier = Modifier
+                .fillMaxHeight()
+                .verticalScroll(rememberScrollState())
+        ) {
+            Surface(
+                color = MaterialTheme.colorScheme.primaryContainer,
+                shape = RoundedCornerShape(20),
+                modifier = Modifier.padding(16.dp)
+            ) {
+                Column(horizontalAlignment = Alignment.CenterHorizontally,
+                    modifier = Modifier.padding(16.dp)
+                ) {
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        Text(
+                            text = "Stundenplan Setup",
+                            style = MaterialTheme.typography.labelMedium,
+                            color = MaterialTheme.colorScheme.onPrimaryContainer,
+                            modifier = Modifier.padding(10.dp)
+                        )
+                        
+                        Spacer(modifier = Modifier.weight(1f))
+                        
+                        if (activityType == "Settings")
+                            IconButton(onClick = { showDeleteConfirmation = !showDeleteConfirmation }) {
+                                Icon(
+                                    imageVector = Icons.Outlined.Delete,
+                                    contentDescription = null,
+                                    modifier = Modifier.size(28.dp),
+                                    tint = MaterialTheme.colorScheme.onPrimaryContainer
+                                )
+                            }
+                        else if (activityType == "FirstSetup")
+                            IconButton(onClick = { showInfo = !showInfo }) {
+                                Icon(
+                                    imageVector = Icons.Outlined.Info,
+                                    contentDescription = null,
+                                    tint = MaterialTheme.colorScheme.onPrimaryContainer
+                                )
+                            }
+                    }
+                    
+                    Spacer(modifier = Modifier.height(16.dp))
+
+                    OutlinedTextField(
+                        value = maxLessons,
+                        onValueChange = { maxLessons = it },
+                        placeholder = {
+                            Text(
+                                text = "Maximale Stundenanzahl an einem Tag",
+                                style = MaterialTheme.typography.labelMedium,
+                                color = MaterialTheme.colorScheme.primaryContainer
+                            )
+                        },
+                        modifier = Modifier.fillMaxWidth(),
+                        singleLine = true,
+                        shape = RoundedCornerShape(20),
+                        textStyle = MaterialTheme.typography.labelMedium,
+                        colors = inputFieldColors
+                    )
+
+                    Spacer(modifier = Modifier.height(16.dp))
+
+                    OutlinedTextField(
+                        value = lessonLength,
+                        onValueChange = { lessonLength = it },
+                        placeholder = {
+                            Text(
+                                text = "Länge einer Schulstunde",
+                                style = MaterialTheme.typography.labelMedium,
+                                color = MaterialTheme.colorScheme.primaryContainer
+                            )
+                        },
+                        modifier = Modifier.fillMaxWidth(),
+                        singleLine = true,
+                        shape = RoundedCornerShape(20),
+                        textStyle = MaterialTheme.typography.labelMedium,
+                        colors = inputFieldColors,
+                        visualTransformation = if(showPassword) VisualTransformation.None else PasswordVisualTransformation(),
+                        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Password),
+                        trailingIcon = {
+                            IconButton(onClick = { showPassword = !showPassword })
+                            {
+                                Image(
+                                    painter = painterResource(
+                                        id = if(showPassword)
+                                            R.drawable.baseline_visibility_24
+                                        else
+                                            R.drawable.baseline_visibility_off_24
+                                    ),
+                                    contentDescription = null,
+                                )
+                            }
+                        }
+                    )
+
+                    Spacer(modifier = Modifier.height(10.dp))
+
+                    Box(
+                        contentAlignment = Alignment.Center,
+                        modifier = Modifier.clickable {
+                            editor.putString("maxLessons", maxLessons)
+                            editor.putString("lessonLength", lessonLength)
+                            editor.apply()
+                            activity.finish()
+                        }
+                    ) {
+                        Text(
+                            text = "Speichen",
+                            color = MaterialTheme.colorScheme.secondary,
+                            style = MaterialTheme.typography.labelMedium,
+                            modifier = Modifier.padding(10.dp)
+                        )
+                    }
+                }
+            }
+        }
+    }
+
+    if (showInfo) {
+        AlertDialog(
+            onDismissRequest = { showInfo = false },
+            text = {
+                Text(
+                    text = "Der Benutzername und das Passwort können später in den Einstellungen geändert werden",
+                    color = MaterialTheme.colorScheme.onPrimaryContainer,
+                    style = MaterialTheme.typography.labelMedium)
+            },
+            confirmButton = {
+                Text(
+                    text = "Schließen",
+                    color = MaterialTheme.colorScheme.secondary,
+                    style = MaterialTheme.typography.labelMedium,
+                    modifier = Modifier.clickable { showInfo = false }
+                )
+            },
+            containerColor = MaterialTheme.colorScheme.primaryContainer,
+            modifier = Modifier
+                .padding(5.dp)
+        )
+    }
+
+    if (showDeleteConfirmation) {
+        AlertDialog(
+            onDismissRequest = { showDeleteConfirmation = false },
+            text = {
+                Text(
+                    text = "Möchten Sie wirklich die Anmeldedaten löschen?",
+                    color = MaterialTheme.colorScheme.onPrimaryContainer,
+                    style = MaterialTheme.typography.labelMedium
+                )
+            },
+            confirmButton = {
+                Row(modifier = Modifier.fillMaxWidth()){
+                    Text(
+                        text = "Bestätigen",
+                        color = MaterialTheme.colorScheme.secondary,
+                        style = MaterialTheme.typography.labelMedium,
+                        modifier = Modifier.clickable {
+                            editor.putString("username", "")
+                            editor.putString("password", "")
+                            editor.apply()
+                            showDeleteConfirmation = false
+                            activity.finish()
+                        }
+                    )
+
+                    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
+        )
+    }
+}

app/src/main/res/values/strings.xml

@@ -9,4 +9,5 @@
     <string name="title_activity_dsbactivity">DSBActivity</string>
     <string name="title_activity_dsbday_view">DSBDayViewActivity</string>
     <string name="title_activity_dsblogin">DSBLoginActivity</string>
+    <string name="title_activity_timetable_setup">TimetableSetupActivity</string>
 </resources>