Start integration with app: adds Hilt for dep injection, implements a view model

backend/src/main/java/net/buzzert/kordophone/backend/model/Conversation.kt

@@ -27,6 +27,11 @@ data class Conversation(
     @SerializedName("lastMessage")
     var lastMessage: Message?,
 ) {
+
+    fun formattedDisplayName(): String {
+        return displayName ?: participants.joinToString(", ")
+    }
+
     override fun equals(other: Any?): Boolean {
         if (other == null || javaClass != other.javaClass) return false
 
@@ -39,4 +44,15 @@ data class Conversation(
             unreadCount == o.unreadCount
         )
     }
+
+    override fun hashCode(): Int {
+        var result = guid.hashCode()
+        result = 31 * result + date.hashCode()
+        result = 31 * result + participants.hashCode()
+        result = 31 * result + (displayName?.hashCode() ?: 0)
+        result = 31 * result + unreadCount
+        result = 31 * result + (lastMessagePreview?.hashCode() ?: 0)
+        result = 31 * result + (lastMessage?.hashCode() ?: 0)
+        return result
+    }
 }

backend/src/test/java/net/buzzert/kordophone/backend/MockServer.kt

@@ -30,6 +30,7 @@ import retrofit2.Response
 import java.util.Date
 import java.util.UUID
 
+@OptIn(ExperimentalStdlibApi::class)
 class MockServer {
     val version = "Kordophone-2.0"
     val conversations: MutableList<Conversation> = mutableListOf()