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• 0.12.0-309
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• Message.kt

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org.jetbrains.kotlinx.jupyter.messaging.Message.kt Maven / Gradle / Ivy

package org.jetbrains.kotlinx.jupyter.messaging

import kotlinx.serialization.encodeToString
import kotlinx.serialization.json.JsonElement
import kotlinx.serialization.json.JsonObject
import kotlinx.serialization.json.decodeFromJsonElement
import kotlinx.serialization.json.encodeToJsonElement
import kotlinx.serialization.json.jsonObject
import org.jetbrains.kotlinx.jupyter.api.libraries.RawMessage
import org.jetbrains.kotlinx.jupyter.protocol.MessageFormat
import org.jetbrains.kotlinx.jupyter.protocol.PROTOCOL_VERSION
import org.jetbrains.kotlinx.jupyter.protocol.RawMessageImpl
import org.jetbrains.kotlinx.jupyter.protocol.data
import java.time.ZonedDateTime
import java.time.format.DateTimeFormatter
import java.util.UUID

data class Message(
    val id: List = listOf(),
    val data: MessageData = MessageData(),
) {
    val type: MessageType
        get() = data.header!!.type

    val content: MessageContent
        get() = data.content!!

    override fun toString(): String =
        "msg[${id.joinToString { it.toString(charset = Charsets.UTF_8) }}] " +
            MessageFormat.encodeToString(data)
}

fun RawMessage.toMessage(): Message {
    return Message(id, MessageFormat.decodeFromJsonElement(data))
}

fun Message.toRawMessage(): RawMessage {
    val dataJson = MessageFormat.encodeToJsonElement(data).jsonObject
    return RawMessageImpl(
        id,
        dataJson["header"]!!.jsonObject,
        dataJson["parent_header"] as? JsonObject,
        dataJson["metadata"] as? JsonObject,
        dataJson["content"]!!,
    )
}

fun makeReplyMessage(
    msg: RawMessage,
    msgType: MessageType? = null,
    sessionId: String? = null,
    header: MessageHeader? = null,
    parentHeader: MessageHeader? = null,
    metadata: JsonElement? = null,
    content: MessageContent? = null,
) = Message(
    id = msg.id,
    MessageData(
        header = header ?: makeHeader(msgType = msgType, incomingMsg = msg, sessionId = sessionId),
        parentHeader = parentHeader ?: MessageFormat.decodeFromJsonElement(msg.header),
        metadata = metadata,
        content = content,
    ),
)

fun makeHeader(
    msgType: MessageType? = null,
    incomingMsg: RawMessage? = null,
    sessionId: String? = null,
): MessageHeader {
    val parentHeader = incomingMsg?.header?.let { MessageFormat.decodeFromJsonElement(it) }
    return makeHeader(
        msgType ?: MessageType.NONE,
        parentHeader?.session ?: sessionId,
        parentHeader?.username ?: "kernel",
    )
}

private val ISO8601DateFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSSSSSSSxxx'['VV']'")
val ISO8601DateNow: String get() = ZonedDateTime.now().format(ISO8601DateFormatter)

fun makeHeader(
    type: MessageType,
    sessionId: String?,
    username: String?,
): MessageHeader {
    return MessageHeader(
        UUID.randomUUID().toString(),
        type,
        sessionId,
        username,
        PROTOCOL_VERSION,
        ISO8601DateNow,
    )
}