366 lines
19 KiB
Kotlin
366 lines
19 KiB
Kotlin
package org.session.libsession.messaging.sending_receiving
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import nl.komponents.kovenant.Promise
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import nl.komponents.kovenant.deferred
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import org.session.libsession.messaging.MessagingModuleConfiguration
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import org.session.libsession.messaging.jobs.JobQueue
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import org.session.libsession.messaging.jobs.MessageSendJob
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import org.session.libsession.messaging.jobs.NotifyPNServerJob
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import org.session.libsession.messaging.messages.Destination
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import org.session.libsession.messaging.messages.Message
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import org.session.libsession.messaging.messages.control.ClosedGroupControlMessage
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import org.session.libsession.messaging.messages.control.ConfigurationMessage
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import org.session.libsession.messaging.messages.control.ExpirationTimerUpdate
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import org.session.libsession.messaging.messages.control.UnsendRequest
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import org.session.libsession.messaging.messages.visible.*
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import org.session.libsession.messaging.open_groups.*
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import org.session.libsession.messaging.utilities.MessageWrapper
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import org.session.libsession.snode.RawResponsePromise
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import org.session.libsession.snode.SnodeAPI
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import org.session.libsession.snode.SnodeMessage
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import org.session.libsession.snode.SnodeModule
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import org.session.libsession.utilities.Address
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import org.session.libsession.utilities.GroupUtil
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import org.session.libsession.utilities.SSKEnvironment
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import org.session.libsignal.crypto.PushTransportDetails
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import org.session.libsignal.protos.SignalServiceProtos
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import org.session.libsignal.utilities.Base64
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import org.session.libsignal.utilities.Log
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import org.session.libsignal.utilities.hexEncodedPublicKey
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import org.session.libsession.messaging.sending_receiving.attachments.Attachment as SignalAttachment
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import org.session.libsession.messaging.sending_receiving.link_preview.LinkPreview as SignalLinkPreview
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import org.session.libsession.messaging.sending_receiving.quotes.QuoteModel as SignalQuote
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object MessageSender {
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// Error
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sealed class Error(val description: String) : Exception(description) {
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object InvalidMessage : Error("Invalid message.")
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object ProtoConversionFailed : Error("Couldn't convert message to proto.")
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object NoUserED25519KeyPair : Error("Couldn't find user ED25519 key pair.")
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object SigningFailed : Error("Couldn't sign message.")
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object EncryptionFailed : Error("Couldn't encrypt message.")
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// Closed groups
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object NoThread : Error("Couldn't find a thread associated with the given group public key.")
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object NoKeyPair: Error("Couldn't find a private key associated with the given group public key.")
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object InvalidClosedGroupUpdate : Error("Invalid group update.")
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internal val isRetryable: Boolean = when (this) {
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is InvalidMessage, ProtoConversionFailed, InvalidClosedGroupUpdate -> false
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else -> true
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}
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}
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// Convenience
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fun send(message: Message, destination: Destination): Promise<Unit, Exception> {
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if (destination is Destination.OpenGroupV2) {
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return sendToOpenGroupDestination(destination, message)
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} else {
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return sendToSnodeDestination(destination, message)
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}
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}
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// One-on-One Chats & Closed Groups
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private fun sendToSnodeDestination(destination: Destination, message: Message, isSyncMessage: Boolean = false): Promise<Unit, Exception> {
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val deferred = deferred<Unit, Exception>()
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val promise = deferred.promise
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val storage = MessagingModuleConfiguration.shared.storage
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val userPublicKey = storage.getUserPublicKey()
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// Set the timestamp, sender and recipient
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if (message.sentTimestamp == null) {
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message.sentTimestamp = System.currentTimeMillis() // Visible messages will already have their sent timestamp set
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}
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message.sender = userPublicKey
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val isSelfSend = (message.recipient == userPublicKey)
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// Set the failure handler (need it here already for precondition failure handling)
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fun handleFailure(error: Exception) {
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handleFailedMessageSend(message, error)
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if (destination is Destination.Contact && message is VisibleMessage && !isSelfSend) {
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SnodeModule.shared.broadcaster.broadcast("messageFailed", message.sentTimestamp!!)
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}
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deferred.reject(error)
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}
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try {
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when (destination) {
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is Destination.Contact -> message.recipient = destination.publicKey
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is Destination.ClosedGroup -> message.recipient = destination.groupPublicKey
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is Destination.OpenGroupV2 -> throw IllegalStateException("Destination should not be an open group.")
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}
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// Validate the message
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if (!message.isValid()) { throw Error.InvalidMessage }
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// Stop here if this is a self-send, unless it's:
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// • a configuration message
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// • a sync message
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// • a closed group control message of type `new`
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var isNewClosedGroupControlMessage = false
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if (message is ClosedGroupControlMessage && message.kind is ClosedGroupControlMessage.Kind.New) isNewClosedGroupControlMessage = true
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if (isSelfSend && message !is ConfigurationMessage && !isSyncMessage && !isNewClosedGroupControlMessage && message !is UnsendRequest) {
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handleSuccessfulMessageSend(message, destination)
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deferred.resolve(Unit)
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return promise
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}
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// Attach the user's profile if needed
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if (message is VisibleMessage) {
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val displayName = storage.getUserDisplayName()!!
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val profileKey = storage.getUserProfileKey()
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val profilePictureUrl = storage.getUserProfilePictureURL()
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if (profileKey != null && profilePictureUrl != null) {
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message.profile = Profile(displayName, profileKey, profilePictureUrl)
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} else {
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message.profile = Profile(displayName)
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}
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}
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// Convert it to protobuf
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val proto = message.toProto() ?: throw Error.ProtoConversionFailed
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// Serialize the protobuf
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val plaintext = PushTransportDetails.getPaddedMessageBody(proto.toByteArray())
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// Encrypt the serialized protobuf
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val ciphertext: ByteArray
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when (destination) {
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is Destination.Contact -> ciphertext = MessageEncrypter.encrypt(plaintext, destination.publicKey)
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is Destination.ClosedGroup -> {
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val encryptionKeyPair = MessagingModuleConfiguration.shared.storage.getLatestClosedGroupEncryptionKeyPair(destination.groupPublicKey)!!
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ciphertext = MessageEncrypter.encrypt(plaintext, encryptionKeyPair.hexEncodedPublicKey)
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}
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is Destination.OpenGroupV2 -> throw IllegalStateException("Destination should not be open group.")
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}
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// Wrap the result
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val kind: SignalServiceProtos.Envelope.Type
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val senderPublicKey: String
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when (destination) {
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is Destination.Contact -> {
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kind = SignalServiceProtos.Envelope.Type.SESSION_MESSAGE
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senderPublicKey = ""
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}
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is Destination.ClosedGroup -> {
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kind = SignalServiceProtos.Envelope.Type.CLOSED_GROUP_MESSAGE
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senderPublicKey = destination.groupPublicKey
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}
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is Destination.OpenGroupV2 -> throw IllegalStateException("Destination should not be open group.")
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}
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val wrappedMessage = MessageWrapper.wrap(kind, message.sentTimestamp!!, senderPublicKey, ciphertext)
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// Send the result
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if (destination is Destination.Contact && message is VisibleMessage && !isSelfSend) {
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SnodeModule.shared.broadcaster.broadcast("calculatingPoW", message.sentTimestamp!!)
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}
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val base64EncodedData = Base64.encodeBytes(wrappedMessage)
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// Send the result
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val timestamp = message.sentTimestamp!! + SnodeAPI.clockOffset
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val snodeMessage = SnodeMessage(message.recipient!!, base64EncodedData, message.ttl, timestamp)
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if (destination is Destination.Contact && message is VisibleMessage && !isSelfSend) {
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SnodeModule.shared.broadcaster.broadcast("sendingMessage", message.sentTimestamp!!)
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}
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SnodeAPI.sendMessage(snodeMessage).success { promises: Set<RawResponsePromise> ->
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var isSuccess = false
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val promiseCount = promises.size
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var errorCount = 0
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promises.iterator().forEach { promise: RawResponsePromise ->
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promise.success {
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if (isSuccess) { return@success } // Succeed as soon as the first promise succeeds
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isSuccess = true
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if (destination is Destination.Contact && message is VisibleMessage && !isSelfSend) {
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SnodeModule.shared.broadcaster.broadcast("messageSent", message.sentTimestamp!!)
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}
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val hash = it["hash"] as? String
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message.serverHash = hash
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handleSuccessfulMessageSend(message, destination, isSyncMessage)
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var shouldNotify = ((message is VisibleMessage || message is UnsendRequest) && !isSyncMessage)
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/*
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if (message is ClosedGroupControlMessage && message.kind is ClosedGroupControlMessage.Kind.New) {
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shouldNotify = true
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}
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*/
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if (shouldNotify) {
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val notifyPNServerJob = NotifyPNServerJob(snodeMessage)
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JobQueue.shared.add(notifyPNServerJob)
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}
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deferred.resolve(Unit)
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}
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promise.fail {
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errorCount += 1
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if (errorCount != promiseCount) { return@fail } // Only error out if all promises failed
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handleFailure(it)
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}
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}
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}.fail {
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Log.d("Loki", "Couldn't send message due to error: $it.")
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handleFailure(it)
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}
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} catch (exception: Exception) {
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handleFailure(exception)
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}
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return promise
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}
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// Open Groups
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private fun sendToOpenGroupDestination(destination: Destination, message: Message): Promise<Unit, Exception> {
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val deferred = deferred<Unit, Exception>()
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val storage = MessagingModuleConfiguration.shared.storage
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if (message.sentTimestamp == null) {
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message.sentTimestamp = System.currentTimeMillis()
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}
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message.sender = storage.getUserPublicKey()
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// Set the failure handler (need it here already for precondition failure handling)
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fun handleFailure(error: Exception) {
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handleFailedMessageSend(message, error)
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deferred.reject(error)
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}
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try {
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when (destination) {
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is Destination.Contact, is Destination.ClosedGroup -> throw IllegalStateException("Invalid destination.")
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is Destination.OpenGroupV2 -> {
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message.recipient = "${destination.server}.${destination.room}"
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val server = destination.server
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val room = destination.room
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// Attach the user's profile if needed
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if (message is VisibleMessage) {
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val displayName = storage.getUserDisplayName()!!
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val profileKey = storage.getUserProfileKey()
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val profilePictureUrl = storage.getUserProfilePictureURL()
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if (profileKey != null && profilePictureUrl != null) {
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message.profile = Profile(displayName, profileKey, profilePictureUrl)
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} else {
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message.profile = Profile(displayName)
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}
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}
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// Validate the message
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if (message !is VisibleMessage || !message.isValid()) {
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throw Error.InvalidMessage
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}
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val proto = message.toProto()!!
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val plaintext = PushTransportDetails.getPaddedMessageBody(proto.toByteArray())
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val openGroupMessage = OpenGroupMessageV2(
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sender = message.sender,
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sentTimestamp = message.sentTimestamp!!,
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base64EncodedData = Base64.encodeBytes(plaintext),
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)
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OpenGroupAPIV2.send(openGroupMessage,room,server).success {
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message.openGroupServerMessageID = it.serverID
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handleSuccessfulMessageSend(message, destination, openGroupSentTimestamp = it.sentTimestamp)
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deferred.resolve(Unit)
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}.fail {
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handleFailure(it)
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}
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}
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}
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} catch (exception: Exception) {
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handleFailure(exception)
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}
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return deferred.promise
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}
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// Result Handling
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fun handleSuccessfulMessageSend(message: Message, destination: Destination, isSyncMessage: Boolean = false, openGroupSentTimestamp: Long = -1) {
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val storage = MessagingModuleConfiguration.shared.storage
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val userPublicKey = storage.getUserPublicKey()!!
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// Ignore future self-sends
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storage.addReceivedMessageTimestamp(message.sentTimestamp!!)
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storage.getMessageIdInDatabase(message.sentTimestamp!!, message.sender?:userPublicKey)?.let { messageID ->
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if (openGroupSentTimestamp != -1L && message is VisibleMessage) {
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storage.addReceivedMessageTimestamp(openGroupSentTimestamp)
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storage.updateSentTimestamp(messageID, message.isMediaMessage(), openGroupSentTimestamp, message.threadID!!)
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message.sentTimestamp = openGroupSentTimestamp
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}
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// When the sync message is successfully sent, the hash value of this TSOutgoingMessage
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// will be replaced by the hash value of the sync message. Since the hash value of the
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// real message has no use when we delete a message. It is OK to let it be.
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message.serverHash?.let {
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storage.setMessageServerHash(messageID, it)
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}
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// Track the open group server message ID
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if (message.openGroupServerMessageID != null && destination is Destination.OpenGroupV2) {
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val encoded = GroupUtil.getEncodedOpenGroupID("${destination.server}.${destination.room}".toByteArray())
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val threadID = storage.getThreadId(Address.fromSerialized(encoded))
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if (threadID != null && threadID >= 0) {
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storage.setOpenGroupServerMessageID(messageID, message.openGroupServerMessageID!!, threadID, !(message as VisibleMessage).isMediaMessage())
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}
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}
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// Mark the message as sent
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storage.markAsSent(message.sentTimestamp!!, message.sender?:userPublicKey)
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storage.markUnidentified(message.sentTimestamp!!, message.sender?:userPublicKey)
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// Start the disappearing messages timer if needed
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if (message is VisibleMessage && !isSyncMessage) {
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SSKEnvironment.shared.messageExpirationManager.startAnyExpiration(message.sentTimestamp!!, message.sender?:userPublicKey)
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}
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}
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// Sync the message if:
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// • it's a visible message
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// • the destination was a contact
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// • we didn't sync it already
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if (destination is Destination.Contact && !isSyncMessage) {
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if (message is VisibleMessage) { message.syncTarget = destination.publicKey }
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if (message is ExpirationTimerUpdate) { message.syncTarget = destination.publicKey }
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sendToSnodeDestination(Destination.Contact(userPublicKey), message, true)
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}
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}
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fun handleFailedMessageSend(message: Message, error: Exception) {
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val storage = MessagingModuleConfiguration.shared.storage
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val userPublicKey = storage.getUserPublicKey()!!
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storage.setErrorMessage(message.sentTimestamp!!, message.sender?:userPublicKey, error)
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}
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// Convenience
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@JvmStatic
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fun send(message: VisibleMessage, address: Address, attachments: List<SignalAttachment>, quote: SignalQuote?, linkPreview: SignalLinkPreview?) {
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val messageDataProvider = MessagingModuleConfiguration.shared.messageDataProvider
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val attachmentIDs = messageDataProvider.getAttachmentIDsFor(message.id!!)
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message.attachmentIDs.addAll(attachmentIDs)
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message.quote = Quote.from(quote)
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message.linkPreview = LinkPreview.from(linkPreview)
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message.linkPreview?.let { linkPreview ->
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if (linkPreview.attachmentID == null) {
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messageDataProvider.getLinkPreviewAttachmentIDFor(message.id!!)?.let { attachmentID ->
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message.linkPreview!!.attachmentID = attachmentID
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message.attachmentIDs.remove(attachmentID)
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}
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}
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}
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send(message, address)
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}
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@JvmStatic
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fun send(message: Message, address: Address) {
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val threadID = MessagingModuleConfiguration.shared.storage.getOrCreateThreadIdFor(address)
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message.threadID = threadID
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val destination = Destination.from(address)
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val job = MessageSendJob(message, destination)
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JobQueue.shared.add(job)
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}
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fun sendNonDurably(message: VisibleMessage, attachments: List<SignalAttachment>, address: Address): Promise<Unit, Exception> {
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val attachmentIDs = MessagingModuleConfiguration.shared.messageDataProvider.getAttachmentIDsFor(message.id!!)
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message.attachmentIDs.addAll(attachmentIDs)
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return sendNonDurably(message, address)
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}
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fun sendNonDurably(message: Message, address: Address): Promise<Unit, Exception> {
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val threadID = MessagingModuleConfiguration.shared.storage.getOrCreateThreadIdFor(address)
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message.threadID = threadID
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val destination = Destination.from(address)
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return send(message, destination)
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}
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// Closed groups
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fun createClosedGroup(name: String, members: Collection<String>): Promise<String, Exception> {
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return create(name, members)
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}
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fun explicitNameChange(groupPublicKey: String, newName: String) {
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return setName(groupPublicKey, newName)
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}
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fun explicitAddMembers(groupPublicKey: String, membersToAdd: List<String>) {
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return addMembers(groupPublicKey, membersToAdd)
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}
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fun explicitRemoveMembers(groupPublicKey: String, membersToRemove: List<String>) {
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return removeMembers(groupPublicKey, membersToRemove)
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}
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@JvmStatic
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fun explicitLeave(groupPublicKey: String, notifyUser: Boolean): Promise<Unit, Exception> {
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return leave(groupPublicKey, notifyUser)
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}
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} |