status-desktop/ui/app/AppLayouts/Wallet/services/dapps/DAppsService.qml

import QtQuick 2.15

import StatusQ 0.1
import StatusQ.Core.Utils 0.1 as SQUtils

import AppLayouts.Wallet 1.0
import AppLayouts.Wallet.services.dapps 1.0
import AppLayouts.Wallet.services.dapps.types 1.0
import shared.popups.walletconnect 1.0

import SortFilterProxyModel 0.2
import utils 1.0

import "types"

SQUtils.QObject {
    id: root

    required property DAppsModule dappsModule
    required property string selectedAddress
    required property var accountsModel

    property bool walletConnectFeatureEnabled: true
    property bool connectorFeatureEnabled: true

    // Output properties
    /// Model contaning all dApps available for the currently selected account
    readonly property var dappsModel: d.filteredDappsModel
    /// Model containig the dApps session requests to be resolved by the user
    readonly property SessionRequestsModel sessionRequestsModel: dappsModule.requestsModel
    /// Service can interact with the current address selection
    /// Default value: true
    readonly property bool serviceAvailableToCurrentAddress: !root.selectedAddress ||
                SQUtils.ModelUtils.contains(root.accountsModel, "address", root.selectedAddress, Qt.CaseInsensitive)

    readonly property bool isServiceOnline: dappsModule.isServiceOnline

    // signals
    signal connectDApp(var dappChains, url dappUrl, string dappName, url dappIcon, string connectorIcon, string key)
    // Emitted as a response to DAppsService.approveSession
    // @param key The key of the session proposal
    // @param error The error message
    // @param topic The new topic of the session
    signal approveSessionResult(string key, var error, string topic)
    // Emitted when a new session is requested by a dApp
    signal sessionRequest(string id)
    // Emitted when the services requests to display a toast message
    // @param message The message to display
    // @param type The type of the message. Maps to Constants.ephemeralNotificationType
    signal displayToastMessage(string message, int type)
    // Emitted as a response to DAppsService.validatePairingUri or other DAppsService.pair
    // and DAppsService.approvePair errors
    signal pairingValidated(int validationState)

    // methods
    /// Triggers the signing process for the given session request
    /// @param topic The topic of the session
    /// @param id The id of the session request
    function sign(topic, id) {
        // The authentication triggers the signing process
        // authenticate -> sign -> inform the dApp
        d.sign(topic, id)
    }

    function rejectSign(topic, id, hasError) {
        d.rejectSign(topic, id, hasError)
    }

    function signRequestIsLive(topic, id) {
        d.signRequestIsLive(topic, id)
    }

    /// Validates the pairing URI
    function validatePairingUri(uri) {
        d.validatePairingUri(uri)
    }

    /// Initiates the pairing process with the given URI
    function pair(uri) {
        timeoutTimer.start()
        dappsModule.pair(uri)
    }

    /// Approves or rejects the session proposal
    function approvePairSession(key, approvedChainIds, accountAddress) {
        dappsModule.approvePairSession(key, approvedChainIds, accountAddress)
    }


    /// Rejects the session proposal
    function rejectPairSession(id) {
        dappsModule.rejectPairSession(id)
    }

    /// Disconnects the dApp with the given topic
    /// @param topic The topic of the dApp
    /// @param source The source of the dApp; either "walletConnect" or "connector"
    function disconnectDapp(topic) {
        d.disconnectDapp(topic)
    }

    SQUtils.QObject {
        id: d

        readonly property var filteredDappsModel: SortFilterProxyModel {
            id: dappsFilteredModel
            objectName: "DAppsModelFiltered"
            sourceModel: root.dappsModule.dappsModel
            readonly property string selectedAddress: root.selectedAddress
            readonly property var connectorIcons: Constants.dappImageByType

            proxyRoles: [
                FastExpressionRole {
                    name: "connectorBadge"
                    expression: dappsFilteredModel.connectorIcons[connectorId]
                    expectedRoles: "connectorId"
                }
            ]
            filters: FastExpressionFilter {
                enabled: !!dappsFilteredModel.selectedAddress

                function isAddressIncluded(accountAddressesSubModel, selectedAddress) {
                    if (!accountAddressesSubModel) {
                        return false
                    }
                    const addresses = SQUtils.ModelUtils.modelToFlatArray(accountAddressesSubModel, "address")
                    return addresses.includes(selectedAddress)
                }
                expression: isAddressIncluded(model.accountAddresses, dappsFilteredModel.selectedAddress)

                expectedRoles: "accountAddresses"
            }
        }

        function disconnectDapp(connectionId) {
            dappsModule.disconnectSession(connectionId)
        }

        function validatePairingUri(uri) {
            // Check if emoji inside the URI
            if(Constants.regularExpressions.emoji.test(uri)) {
                root.pairingValidated(Pairing.errors.tooCool)
                return
            } else if(!DAppsHelpers.validURI(uri)) {
                root.pairingValidated(Pairing.errors.invalidUri)
                return
            }

            dappsModule.validatePairingUri(uri)
        }

        function signRequestIsLive(topic, id) {
            const request = root.sessionRequestsModel.findRequest(topic, id)
            if (!request) {
                console.error("Session request not found")
                return
            }
            request.setActive()
        }
        
        function sign(topic, id) {
            const request = root.sessionRequestsModel.findRequest(topic, id)
            if (!request) {
                console.error("Session request not found")
                return
            }
            request.accept()
        }

        function rejectSign(topic, id, hasError) {
            const request = root.sessionRequestsModel.findRequest(topic, id)
            if (!request) {
                console.error("Session request not found")
                return
            }
            request.reject(hasError)
        }

        function reportPairErrorState(state) {
            timeoutTimer.stop()
            root.pairingValidated(state)
        }
    }

    Connections {
        target: root.dappsModule
        enabled: root.walletConnectFeatureEnabled || root.connectorFeatureEnabled
        function onPairingValidated(state) {
            timeoutTimer.stop()
            root.pairingValidated(state)
        }

        function onPairingResponse(key, state) {
            timeoutTimer.stop()
            if (state != Pairing.errors.uriOk) {
                d.reportPairErrorState(state)
            }
        }

        function onConnectDApp(dappChains, dappUrl, dappName, dappIcon, connectorId, key) {
            const connectorIcon = Constants.dappImageByType[connectorId]
            root.connectDApp(dappChains, dappUrl, dappName, dappIcon, connectorIcon, key)
        }

        function onDappConnected(proposal, topic, url, connectorId) {
            const dappDomain = SQUtils.StringUtils.extractDomainFromLink(url)
            const connectorName = connectorId === Constants.WalletConnect ? "WalletConnect" : "Status Connector"
            root.displayToastMessage(qsTr("Connected to %1 via %2").arg(dappDomain).arg(connectorName), Constants.ephemeralNotificationType.success)
            root.approveSessionResult(proposal, null, topic)
        }

        function onDappDisconnected(topic, url) {
            const appDomain = SQUtils.StringUtils.extractDomainFromLink(url)
            root.displayToastMessage(qsTr("Disconnected from %1").arg(appDomain), Constants.ephemeralNotificationType.success)
        }

        function onNewConnectionFailed(key, url, error) {
            timeoutTimer.stop()
            const dappDomain = SQUtils.StringUtils.extractDomainFromLink(url)
            if (error === Pairing.errors.userRejected) {
                root.displayToastMessage(qsTr("Connection request for %1 was rejected").arg(dappDomain), Constants.ephemeralNotificationType.success)
            }
            if (error === Pairing.errors.rejectFailed) {
                root.displayToastMessage(qsTr("Failed to reject connection request for %1").arg(dappDomain), Constants.ephemeralNotificationType.danger)
            }
            d.reportPairErrorState(error)
            root.approveSessionResult(key, error, "")
        }

        function onSignCompleted(topic, id, userAccepted, error) {
            const request = root.sessionRequestsModel.findRequest(topic, id)
            if (!request) {
                console.error("Session request not found")
                return
            }

            const methodStr = SessionRequest.methodToUserString(request.method)
            const appUrl = request.dappUrl
            const appDomain = SQUtils.StringUtils.extractDomainFromLink(appUrl)
            if (!methodStr) {
                console.error("Error finding user string for method", request.method)
                return
            }

            if (error) {
                root.displayToastMessage(qsTr("Fail to %1 from %2").arg(methodStr).arg(appDomain), Constants.ephemeralNotificationType.danger)
                return
            }

            const requestExpired = request.isExpired()
            if (requestExpired) {
                root.displayToastMessage("%1 sign request timed out".arg(appDomain), Constants.ephemeralNotificationType.normal)
                return
            }

            const actionStr = userAccepted ? qsTr("accepted") : qsTr("rejected")
            root.displayToastMessage("%1 %2 %3".arg(appDomain).arg(methodStr).arg(actionStr), Constants.ephemeralNotificationType.success)
        }

        function onSiweCompleted(topic, id, userAccepted, error) {
            if (error) {
                root.displayToastMessage(error, Constants.ephemeralNotificationType.danger)
            }
            root.approveSessionResult(id, error, topic)
        }
    }

    // Timeout for the corner case where the URL was already dismissed and the SDK doesn't respond with an error nor advances with the proposal
    Timer {
        id: timeoutTimer

        interval: 10000 // (10 seconds)
        running: false
        repeat: false

        onTriggered: {
            d.reportPairErrorState(Pairing.errors.unknownError)
        }
    }
}