NexconnChatSDK/ai.nexconn.chat/NCEngine/registerCustomMessages

registerCustomMessages

public final Unit registerCustomMessages(List<Class<? extends MessageContent>> messageClasses)

Registers custom message types.

Define custom messages by extending CustomMessageContent or CustomMediaMessageContent, then call this method after initialize and before connect to register them.

The SDK will automatically:

Read metadata such as message type identifier and storage policy
Register the message class type internally
Handle encoding and decoding during send/receive

// 1. Define a custom message (extends CustomMessageContent)
class CardMessage : CustomMessageContent() {
    var title: String = ""
    var imageUrl: String = ""
    var linkUrl: String = ""

    override fun messageType(): String = "app:card"
    override fun persistentFlag(): Int = MessagePersistent.COUNT

    override fun encodeFields(): Map<String, Any?> = mapOf(
        "title" to title,
        "imageUrl" to imageUrl,
        "linkUrl" to linkUrl
    )

    override fun decodeFields(fields: Map<String, Any?>) {
        title = fields["title"] as? String ?: ""
        imageUrl = fields["imageUrl"] as? String ?: ""
        linkUrl = fields["linkUrl"] as? String ?: ""
    }
}

// 2. Register the custom message
NCEngine.registerCustomMessages(listOf(CardMessage::class.java))

Parameters

messageClasses

List of custom message classes extending CustomMessageContent or CustomMediaMessageContent