NexconnChatSDK/ai.nexconn.chat.message/CustomMessageContent

CustomMessageContent

public abstract class CustomMessageContent extends MessageContent

Base class for custom message content.

Extend this class to define custom message types. The SDK handles registration, sending, and decoding automatically — no internal SDK types are needed.

Subclasses must:

Provide a no-argument constructor (the SDK creates instances via reflection)
Implement messageType, persistentFlag, encodeFields, decodeFields

Usage example:

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 ?: ""
    }
}

NCEngine.registerCustomMessages(listOf(CardMessage::class.java))

Constructors

CustomMessageContent

public CustomMessageContent CustomMessageContent()

Inherited properties

private Long destructTime

Auto-destruct duration in seconds after the message is read.

private String extra

Extra data attached to the message content (sent along with the message, synced remotely).

private Boolean isDestruct

Whether this is a burn-after-reading message.

private MentionedInfo mentionedInfo

Mention (@) info.

Functions

public abstract Unit decodeFields(Map<String, Object> fields)

Decodes the message content from field data.

public abstract Map<String, Object> encodeFields()

Encodes the message content into serializable key-value pairs.

public abstract String messageType()

Message type identifier.

public abstract Integer persistentFlag()

Message storage policy flag.

searchableWords

public List<String> searchableWords()

Returns a list of keywords to be indexed for message search.

Inherited functions

getDestructTime

public final Long getDestructTime()

Auto-destruct duration in seconds after the message is read.

public final String getExtra()

Extra data attached to the message content (sent along with the message, synced remotely).

getMentionedInfo

public final MentionedInfo getMentionedInfo()

Mention (@) info.

public final Boolean isDestruct()

Whether this is a burn-after-reading message.

public final Unit setDestruct(Boolean isDestruct)

Whether this is a burn-after-reading message.

setDestructTime

public final Unit setDestructTime(Long destructTime)

Auto-destruct duration in seconds after the message is read.

public final Unit setExtra(String extra)

Extra data attached to the message content (sent along with the message, synced remotely).

setMentionedInfo

public final Unit setMentionedInfo(MentionedInfo mentionedInfo)

Mention (@) info.

public String toString()