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MessagesViewModel.kt
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MessagesViewModel.kt
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package io.iohk.atala.prism.sampleapp.ui.messages
import android.app.Application
import androidx.lifecycle.AndroidViewModel
import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.viewModelScope
import io.iohk.atala.prism.sampleapp.Sdk
import io.iohk.atala.prism.sampleapp.db.AppDatabase
import io.iohk.atala.prism.sampleapp.db.DatabaseClient
import io.iohk.atala.prism.walletsdk.domain.models.Credential
import io.iohk.atala.prism.walletsdk.domain.models.CredentialType
import io.iohk.atala.prism.walletsdk.domain.models.DID
import io.iohk.atala.prism.walletsdk.domain.models.DIDDocument
import io.iohk.atala.prism.walletsdk.domain.models.InputFieldFilter
import io.iohk.atala.prism.walletsdk.domain.models.Message
import io.iohk.atala.prism.walletsdk.domain.models.PresentationClaims
import io.iohk.atala.prism.walletsdk.domain.models.StringPredicate
import io.iohk.atala.prism.walletsdk.prismagent.DIDCOMM1
import io.iohk.atala.prism.walletsdk.prismagent.DIDCOMM_MESSAGING
import io.iohk.atala.prism.walletsdk.prismagent.protocols.ProtocolType
import io.iohk.atala.prism.walletsdk.prismagent.protocols.issueCredential.IssueCredential
import io.iohk.atala.prism.walletsdk.prismagent.protocols.issueCredential.OfferCredential
import io.iohk.atala.prism.walletsdk.prismagent.protocols.proofOfPresentation.RequestPresentation
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import java.time.LocalDateTime
import io.iohk.atala.prism.sampleapp.db.Message as MessageEntity
class MessagesViewModel(application: Application) : AndroidViewModel(application) {
private var messages: MutableLiveData<List<Message>> = MutableLiveData()
private var proofRequestToProcess: MutableLiveData<Pair<Message, List<Credential>>> =
MutableLiveData()
private val issuedCredentials: ArrayList<String> = arrayListOf()
private val processedOffers: ArrayList<String> = arrayListOf()
private val db: AppDatabase = DatabaseClient.getInstance()
init {
viewModelScope.launch(Dispatchers.IO) {
db.messageDao().isMessageRead("")
}
}
private suspend fun insertMessages(list: List<Message>) {
list.forEach { msg ->
db.messageDao()
.insertMessage(MessageEntity(messageId = msg.id, isRead = false))
}
}
fun messagesStream(): LiveData<List<Message>> {
viewModelScope.launch(Dispatchers.IO) {
Sdk.getInstance().agent.let {
it.handleReceivedMessagesEvents().collect { list ->
insertMessages(list)
messages.postValue(list)
processMessages(list)
}
}
}
return messages
}
fun sendMessage(toDID: DID? = null) {
CoroutineScope(Dispatchers.Default).launch {
val sdk = Sdk.getInstance()
val did = sdk.agent.createNewPeerDID(
arrayOf(
DIDDocument.Service(
DIDCOMM1,
arrayOf(DIDCOMM_MESSAGING),
DIDDocument.ServiceEndpoint(sdk.handler.mediatorDID.toString())
)
),
true
)
val time = LocalDateTime.now()
val message = Message(
// TODO: This should be on ProtocolTypes as an enum
piuri = "https://didcomm.org/basicmessage/2.0/message",
from = did,
to = toDID ?: did,
body = "{\"msg\":\"This is a new test message ${time}\"}"
)
sdk.mercury.sendMessage(message)
}
}
fun sendVerificationRequest(toDID: String) {
CoroutineScope(Dispatchers.Default).launch {
val sdk = Sdk.getInstance()
sdk.agent.initiatePresentationRequest(
type = CredentialType.JWT,
toDID = DID(toDID),
presentationClaims = PresentationClaims(
claims = mapOf(
// "$.issuer" to InputFieldFilter(
// type = "string",
// value = "did:prism:8b5321c004d4a11e87ef3601350eaa8b472a546d11677c9c6845c55a490f02f4"
// ),
"$.vp.emailAddress" to InputFieldFilter(
type = "string",
pattern = "corporate@tomate.domain.com"
)
),
issuer = "did:prism:8b5321c004d4a11e87ef3601350eaa8b472a546d11677c9c6845c55a490f02f4"
),
domain = "domain",
challenge = "challenge"
)
}
}
fun proofRequestToProcess(): LiveData<Pair<Message, List<Credential>>> {
return proofRequestToProcess
}
fun preparePresentationProof(credential: Credential, message: Message) {
val sdk = Sdk.getInstance()
sdk.agent.let { agent ->
sdk.mercury.let { mercury ->
viewModelScope.launch {
val presentation = agent.preparePresentationForRequestProof(
RequestPresentation.fromMessage(message),
credential
)
mercury.sendMessage(presentation.makeMessage())
}
}
}
}
private suspend fun processMessages(messages: List<Message>) {
val sdk = Sdk.getInstance()
val messageIds: List<String> = messages.map { it.id }
val messagesReadStatus =
db.messageDao().areMessagesRead(messageIds).associate { it.messageId to it.isRead }
messages.forEach { message ->
if (messagesReadStatus[message.id] == false) {
sdk.agent.let { agent ->
sdk.pluto.let { pluto ->
sdk.mercury.let { mercury ->
if (message.piuri == ProtocolType.DidcommOfferCredential.value) {
message.thid?.let {
println("Processed offers: $it")
if (!processedOffers.contains(it)) {
println("Processing offer: $it")
processedOffers.add(it)
viewModelScope.launch {
// val credentials = pluto.getAllCredentials().first()
// if (credentials.isEmpty()) {
val offer = OfferCredential.fromMessage(message)
val subjectDID = agent.createNewPrismDID()
val request =
agent.prepareRequestCredentialWithIssuer(
subjectDID,
offer
)
mercury.sendMessage(request.makeMessage())
// }
}
}
}
}
if (message.piuri == ProtocolType.DidcommIssueCredential.value) {
message.thid?.let {
if (!issuedCredentials.contains(it)) {
issuedCredentials.add(it)
viewModelScope.launch {
agent.processIssuedCredentialMessage(
IssueCredential.fromMessage(
message
)
)
}
}
}
}
if (message.piuri == ProtocolType.DidcommRequestPresentation.value && message.direction == Message.Direction.RECEIVED) {
viewModelScope.launch {
agent.getAllCredentials().collect {
proofRequestToProcess.postValue(Pair(message, it))
}
}
}
}
db.messageDao()
.updateMessage(MessageEntity(messageId = message.id, isRead = true))
}
}
}
}
}
}