improve new chat member difference

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/chat/member/ChatMember.kt

@@ -2,6 +2,7 @@ package dev.inmo.tgbotapi.types.chat.member
 
 import dev.inmo.tgbotapi.abstracts.WithUser
 import dev.inmo.tgbotapi.types.statusField
+import dev.inmo.tgbotapi.types.untilDateField
 import dev.inmo.tgbotapi.utils.RiskFeature
 import dev.inmo.tgbotapi.utils.nonstrictJsonFormat
 import kotlinx.serialization.DeserializationStrategy
@@ -11,6 +12,7 @@ import kotlinx.serialization.builtins.serializer
 import kotlinx.serialization.descriptors.SerialDescriptor
 import kotlinx.serialization.encoding.Decoder
 import kotlinx.serialization.encoding.Encoder
+import kotlinx.serialization.json.JsonElement
 import kotlinx.serialization.json.JsonObject
 import kotlinx.serialization.json.jsonPrimitive
 
@@ -19,11 +21,13 @@ sealed interface ChatMember : WithUser {
     @Serializable(StatusSerializer::class)
     enum class Status(
         val status: String,
-        val deserializationStrategy: DeserializationStrategy<ChatMember>
+        val deserializationStrategy: DeserializationStrategy<ChatMember>,
+        val checker: (String, JsonObject) -> Boolean = { outerStatus, _ -> outerStatus == status },
     ) {
         Creator("creator", OwnerChatMember.serializer()),
         Administrator("administrator", AdministratorChatMemberImpl.serializer()),
-        Member("member", MemberChatMemberImpl.serializer()),
+        Member("member", MemberChatMemberImpl.serializer(), { status, json -> status == "member" && json[untilDateField] ?.jsonPrimitive == null }),
+        SubscriptionMember("member", SubscriptionMemberChatMemberImpl.serializer(), { status, json -> status == "member" && json[untilDateField] ?.jsonPrimitive != null }),
         Restricted("restricted", RestrictedChatMember.serializer()),
         Left("left", LeftChatMemberImpl.serializer()),
         Kicked("kicked", KickedChatMember.serializer())
@@ -56,7 +60,7 @@ object ChatMemberSerializer : KSerializer<ChatMember> {
         val json = JsonObject.serializer().deserialize(decoder)
         val status = json[statusField] ?.jsonPrimitive ?.content ?: error("Status field of chat member must be specified, but incoming json contains next: $json")
         return ChatMember.Status.values().firstNotNullOfOrNull {
-            if (it.status == status) {
+            if (it.checker(status, json)) {
                 nonstrictJsonFormat.decodeFromJsonElement(it.deserializationStrategy, json)
             } else {
                 null
@@ -68,6 +72,7 @@ object ChatMemberSerializer : KSerializer<ChatMember> {
         when (value) {
             is OwnerChatMember -> OwnerChatMember.serializer().serialize(encoder, value)
             is AdministratorChatMemberImpl -> AdministratorChatMemberImpl.serializer().serialize(encoder, value)
+            is SubscriptionMemberChatMemberImpl -> SubscriptionMemberChatMemberImpl.serializer().serialize(encoder, value)
             is MemberChatMemberImpl -> MemberChatMemberImpl.serializer().serialize(encoder, value)
             is RestrictedChatMember -> RestrictedChatMember.serializer().serialize(encoder, value)
             is LeftChatMemberImpl -> LeftChatMemberImpl.serializer().serialize(encoder, value)

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/chat/member/MemberChatMember.kt

@@ -1,11 +1,6 @@
 package dev.inmo.tgbotapi.types.chat.member
 
-import dev.inmo.tgbotapi.abstracts.types.UntilDate
-import korlibs.time.DateTime
 import kotlinx.serialization.Serializable
 
 @Serializable(ChatMemberSerializer::class)
-sealed interface MemberChatMember : ChatMember, UntilDate {
+sealed interface MemberChatMember : ChatMember
-    val until: DateTime?
-        get() = untilDate ?.asDate
-}

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/chat/member/MemberChatMemberImpl.kt

@@ -8,10 +8,7 @@ import kotlinx.serialization.*
 @Serializable
 data class MemberChatMemberImpl(
     @SerialName(userField)
-    override val user: User,
+    override val user: User
-    @SerialName(untilDateField)
-    @Serializable(TelegramDateSerializer::class)
-    override val untilDate: TelegramDate? = null
 ) : MemberChatMember {
     @SerialName(statusField)
     @Required

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/chat/member/SubscriptionMemberChatMember.kt

@@ -0,0 +1,13 @@
+package dev.inmo.tgbotapi.types.chat.member
+
+import dev.inmo.tgbotapi.abstracts.types.UntilDate
+import dev.inmo.tgbotapi.types.TelegramDate
+import korlibs.time.DateTime
+import kotlinx.serialization.Serializable
+
+@Serializable(ChatMemberSerializer::class)
+sealed interface SubscriptionMemberChatMember : MemberChatMember, UntilDate {
+    override val untilDate: TelegramDate
+    val until: DateTime
+        get() = untilDate.asDate
+}

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/chat/member/SubscriptionMemberChatMemberImpl.kt

@@ -0,0 +1,20 @@
+package dev.inmo.tgbotapi.types.chat.member
+
+import dev.inmo.tgbotapi.types.*
+import dev.inmo.tgbotapi.types.chat.User
+import korlibs.time.DateTime
+import kotlinx.serialization.*
+
+@Serializable
+data class SubscriptionMemberChatMemberImpl(
+    @SerialName(userField)
+    override val user: User,
+    @SerialName(untilDateField)
+    @Serializable(TelegramDateSerializer::class)
+    override val untilDate: TelegramDate
+) : SubscriptionMemberChatMember {
+    @SerialName(statusField)
+    @Required
+    @EncodeDefault
+    override val status: ChatMember.Status = ChatMember.Status.SubscriptionMember
+}

tgbotapi.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCastsNew.kt

@@ -170,6 +170,7 @@ import dev.inmo.tgbotapi.types.chat.member.MemberChatMember
 import dev.inmo.tgbotapi.types.chat.member.OwnerChatMember
 import dev.inmo.tgbotapi.types.chat.member.RestrictedChatMember
 import dev.inmo.tgbotapi.types.chat.member.SpecialRightsChatMember
+import dev.inmo.tgbotapi.types.chat.member.SubscriptionMemberChatMember
 import dev.inmo.tgbotapi.types.dice.BasketballDiceAnimationType
 import dev.inmo.tgbotapi.types.dice.BowlingDiceAnimationType
 import dev.inmo.tgbotapi.types.dice.CubeDiceAnimationType
@@ -772,6 +773,18 @@ public inline fun <T>
     OptionallyWithUser.ifSpecialRightsChatMember(block: (SpecialRightsChatMember) -> T): T? =
     specialRightsChatMemberOrNull() ?.let(block)
 
+public inline fun OptionallyWithUser.subscriptionMemberChatMemberOrNull():
+    SubscriptionMemberChatMember? = this as?
+    dev.inmo.tgbotapi.types.chat.member.SubscriptionMemberChatMember
+
+public inline fun OptionallyWithUser.subscriptionMemberChatMemberOrThrow():
+    SubscriptionMemberChatMember = this as
+    dev.inmo.tgbotapi.types.chat.member.SubscriptionMemberChatMember
+
+public inline fun <T>
+    OptionallyWithUser.ifSubscriptionMemberChatMember(block: (SubscriptionMemberChatMember) -> T):
+    T? = subscriptionMemberChatMemberOrNull() ?.let(block)
+
 public inline fun OptionallyWithUser.leftChatMemberEventOrNull(): LeftChatMemberEvent? = this as?
     dev.inmo.tgbotapi.types.message.ChatEvents.LeftChatMemberEvent