ADD: Network Communication

app/build.gradle.kts

@@ -63,4 +63,7 @@ dependencies {
     implementation(libs.compose.runtime.livedata)
     implementation(libs.coil.compose)
     ksp(libs.androidx.room.compiler)
+    implementation(libs.retrofit)
+    implementation(libs.converter.gson)
+    implementation(libs.logging.interceptor)
 }

app/src/main/AndroidManifest.xml

@@ -1,6 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           xmlns:tools="http://schemas.android.com/tools">
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 
     <application
             android:allowBackup="true"

app/src/main/java/come/stormborntales/notevault/data/local/AppDatabase.kt

@@ -8,8 +8,9 @@ import androidx.room.RoomDatabase
 import androidx.room.TypeConverters
 import come.stormborntales.notevault.data.local.dao.NoteDao
 import come.stormborntales.notevault.data.local.entity.NoteEntity
+import come.stormborntales.notevault.data.local.entity.SyncTime
 
-@Database(entities = [NoteEntity::class], version = 1)
+@Database(entities = [NoteEntity::class, SyncTime::class], version = 1)
 @TypeConverters(UriListConverter::class)
 abstract class AppDatabase : RoomDatabase() {
     abstract fun noteDao(): NoteDao

app/src/main/java/come/stormborntales/notevault/data/local/entity/NoteEntity.kt

@@ -3,6 +3,11 @@ package come.stormborntales.notevault.data.local.entity
 import androidx.room.Entity
 import androidx.room.PrimaryKey
 
+enum class SyncStatus {
+    PENDING,  // Lokale Änderungen warten auf Synchronisation
+    SYNCHRONIZED,  // Der Eintrag wurde mit dem Server synchronisiert
+    DELETED  // Der Eintrag wurde lokal gelöscht und wartet auf Serverabgleich
+}
 @Entity(tableName = "notes")
 data class NoteEntity(
     @PrimaryKey(autoGenerate = true) val id: Int = 0,
@@ -12,5 +17,10 @@ data class NoteEntity(
     var year: Int?,
     var genre: String?,
     var description: String?,
-    val imagePreview: String
+    val imagePreview: String,
+
+    val remoteId: String? = null,
+    val localModificationTimestamp: Long = System.currentTimeMillis(),  // Zeitstempel der letzten lokalen Änderung
+    val syncStatus: SyncStatus = SyncStatus.PENDING  // Status der Synchronisation
+
 )

app/src/main/java/come/stormborntales/notevault/data/local/entity/SyncTime.kt

@@ -0,0 +1,10 @@
+package come.stormborntales.notevault.data.local.entity
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "sync_time_table")
+data class SyncTime(
+    @PrimaryKey val id: Long = 1,  // Einziger Eintrag für das Gerät
+    val lastSyncTimestamp: Long = System.currentTimeMillis()  // Zeitstempel des letzten Syncsy
+)

app/src/main/java/come/stormborntales/notevault/data/remote/ApiInterface.kt

@@ -0,0 +1,13 @@
+package come.stormborntales.notevault.data.remote
+
+import come.stormborntales.notevault.data.remote.model.user.RegisterRequest
+import retrofit2.Response
+
+import retrofit2.http.Body
+import retrofit2.http.GET
+import retrofit2.http.POST
+
+interface ApiInterface {
+    @POST("user/register")
+    suspend fun register(@Body user: RegisterRequest): Response<Unit>
+}

app/src/main/java/come/stormborntales/notevault/data/remote/Retrofit.kt

@@ -0,0 +1,27 @@
+package come.stormborntales.notevault.data.remote
+
+import okhttp3.OkHttpClient
+import okhttp3.logging.HttpLoggingInterceptor
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import kotlin.getValue
+
+object ApiClient {
+
+    private const val BASE_URL = "https://notevault.fawkes100.de" // <– Anpassen!
+
+    val logging = HttpLoggingInterceptor().apply {
+        level = HttpLoggingInterceptor.Level.BODY
+    }
+    val client = OkHttpClient.Builder()
+        .addInterceptor(logging)
+        .build()
+
+    val retrofit = Retrofit.Builder()
+        .baseUrl(BASE_URL)
+        .client(client)
+        .addConverterFactory(GsonConverterFactory.create())
+        .build()
+
+
+}

app/src/main/java/come/stormborntales/notevault/data/remote/model/user/RegisterRequest.kt

@@ -0,0 +1,10 @@
+package come.stormborntales.notevault.data.remote.model.user
+
+data class RegisterRequest(
+    val email: String,
+    val password: String
+)
+
+data class RegisterResponse(
+    val userId: String
+)

app/src/main/java/come/stormborntales/notevault/ui/screens/SettingsScreen.kt

@@ -1,5 +1,6 @@
 package come.stormborntales.notevault.ui.screens
 
+import android.util.Log
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
@@ -13,12 +14,20 @@ import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
+import come.stormborntales.notevault.data.remote.ApiClient
+import come.stormborntales.notevault.data.remote.ApiInterface
+import come.stormborntales.notevault.data.remote.model.user.RegisterRequest
+import kotlinx.coroutines.launch
 
 @Composable
 fun SettingsScreen() {
+    val coroutineScope = rememberCoroutineScope()
+    val syncApi = remember { ApiClient.retrofit.create(ApiInterface::class.java) }
     Column(
         modifier = Modifier
             .fillMaxSize()
@@ -70,10 +79,25 @@ fun SettingsScreen() {
         Spacer(modifier = Modifier.height(32.dp))
 
         OutlinedButton(
-            onClick = { /* TODO: Impressum anzeigen */ },
+            onClick = {
+                coroutineScope.launch {
+                    try {
+                        val request = RegisterRequest("test@example.com", "123456")
+                        val response = syncApi.register(request)
+
+                        if(response.isSuccessful) {
+                            Log.d("Response", "Response was successful")
+                        } else {
+                            Log.d("Response", "Error: ${response.errorBody()}")
+                        }
+                    } catch (e: Exception) {
+                        println("Netzwerkfehler: ${e.message}")
+                    }
+                }
+            },
             modifier = Modifier.fillMaxWidth()
         ) {
-            Text("Impressum")
+            Text("Registrierung testen")
         }
     }
 }

gradle/libs.versions.toml

@@ -1,6 +1,7 @@
 [versions]
 agp = "8.8.2"
 composeBomVersion = "2024.01.00"
+converterGson = "2.9.0"
 kotlin = "2.0.0"
 coreKtx = "1.10.1"
 junit = "4.13.2"
@@ -9,14 +10,17 @@ espressoCore = "3.6.1"
 lifecycleRuntimeKtx = "2.8.7"
 activityCompose = "1.8.0"
 composeBom = "2024.04.01"
+loggingInterceptor = "4.12.0"
 navigationCompose = "2.8.9"
+retrofit = "2.9.0"
 room = "2.7.1"
-ksp="2.1.21-RC-2.0.0"
+ksp="2.0.0-1.0.21"
 compose = "1.6.0" # oder was immer deine aktuelle Compose-Version ist
 
 [libraries]
 coil-compose = { group = "io.coil-kt", name = "coil-compose", version = "2.5.0" } # oder aktueller
 compose-runtime-livedata = { group = "androidx.compose.runtime", name = "runtime-livedata", version.ref = "compose" }
+converter-gson = { module = "com.squareup.retrofit2:converter-gson", version.ref = "converterGson" }
 lifecycle-livedata-ktx = "androidx.lifecycle:lifecycle-livedata-ktx:2.8.7"
 androidx-compose-bom-v20240100 = { module = "androidx.compose:compose-bom", version.ref = "composeBomVersion" }
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
@@ -39,6 +43,8 @@ androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit
 androidx-material3 = { group = "androidx.compose.material3", name = "material3" }
 androidx-room-ktx = { module = "androidx.room:room-ktx", version.ref = "room" }
 androidx-room-compiler = { module = "androidx.room:room-compiler", version.ref = "room" }
+logging-interceptor = { module = "com.squareup.okhttp3:logging-interceptor", version.ref = "loggingInterceptor" }
+retrofit = { module = "com.squareup.retrofit2:retrofit", version.ref = "retrofit" }
 
 
 [plugins]