feat: add some base config migration logic, start implementing wrappers for conversation and expiry types

libsession-util/src/main/java/network/loki/messenger/libsession_util/Config.kt

@@ -65,4 +65,20 @@ class UserProfile(pointer: Long) : ConfigBase(pointer) {
     external fun getName(): String?
     external fun getPic(): UserPic?
     external fun setPic(userPic: UserPic)
+}
+
+class ConversationConfig(pointer: Long): ConfigBase(pointer) {
+    companion object {
+        init {
+            System.loadLibrary("session_util")
+        }
+
+        external fun newInstance(ed25519SecretKey: ByteArray): ConversationConfig
+
+        external fun newInstance(ed25519SecretKey: ByteArray, initialDump: ByteArray): ConversationConfig
+
+    }
+
+    external fun todo()
+
 }

libsession-util/src/main/java/network/loki/messenger/libsession_util/util/Conversations.kt

@@ -0,0 +1,44 @@
+package network.loki.messenger.libsession_util.util
+
+sealed class Conversation {
+    data class OneToOne(
+        val sessionId: String,
+        val lastRead: Long,
+        val expiryMode: ExpiryMode,
+    ): Conversation()
+
+    data class OpenGroup(
+        val baseUrl: String,
+        val room: String,
+        val pubKey: ByteArray,
+        val lastRead: Long,
+    ) : Conversation() {
+        override fun equals(other: Any?): Boolean {
+            if (this === other) return true
+            if (javaClass != other?.javaClass) return false
+
+            other as OpenGroup
+
+            if (baseUrl != other.baseUrl) return false
+            if (room != other.room) return false
+            if (!pubKey.contentEquals(other.pubKey)) return false
+            if (lastRead != other.lastRead) return false
+
+            return true
+        }
+
+        override fun hashCode(): Int {
+            var result = baseUrl.hashCode()
+            result = 31 * result + room.hashCode()
+            result = 31 * result + pubKey.contentHashCode()
+            result = 31 * result + lastRead.hashCode()
+            return result
+        }
+    }
+
+    data class LegacyClosedGroup(
+        val groupId: String,
+        val lastRead: Long,
+        val expiryMode: ExpiryMode
+    ): Conversation()
+}

libsession-util/src/main/java/network/loki/messenger/libsession_util/util/ExpiryMode.kt

@@ -0,0 +1,7 @@
+package network.loki.messenger.libsession_util.util
+
+sealed class ExpiryMode(val expiryMinutes: Long) {
+    object NONE: ExpiryMode(0)
+    class AfterSend(minutes: Long): ExpiryMode(minutes)
+    class AfterRead(minutes: Long): ExpiryMode(minutes)
+}