conquest/src/client/main.nim

import whisky
import tables, strutils, strformat, json, parsetoml, base64, os # native_dialogs
import ./utils/[appImGui, globals]
import ./views/[dockspace, sessions, listeners, eventlog, console]
import ../common/[types, utils, crypto]
import ./websocket

import sugar 

proc main(ip: string = "localhost", port: int = 37573) = 
    var app = createApp(1024, 800, imnodes = true, title = "Conquest", docking = true)
    defer: app.destroyApp()

    var 
        profile: Profile
        views: Table[string, ptr bool]
        showConquest = true
        showSessionsTable = true
        showListeners = true
        showEventlog = true
        consoles: Table[string, ConsoleComponent]

    var 
        dockTop: ImGuiID = 0
        dockBottom: ImGuiID = 0
        dockTopLeft: ImGuiID = 0
        dockTopRight: ImGuiID = 0

    views["Sessions [Table View]"] = addr showSessionsTable 
    views["Listeners"] = addr showListeners
    views["Eventlog"] = addr showEventlog

    # Create components
    var 
        dockspace = Dockspace()
        sessionsTable = SessionsTable("Sessions [Table View]", addr consoles) 
        listenersTable = ListenersTable("Listeners")
        eventlog = Eventlog("Eventlog")

    let io = igGetIO()

    # Create key pair 
    let clientKeyPair = generateKeyPair() 
        
    # Initiate WebSocket connection
    var connection = WsConnection(
        ws: newWebSocket(fmt"ws://{ip}:{$port}"),
        sessionKey: default(Key)
    )
    defer: connection.ws.close() 

    # main loop
    while not app.handle.windowShouldClose:
        pollEvents()

        # Reduce rendering activity when window is minimized 
        if app.isIconifySleep():
            continue 
        newFrame()

        # Initialize dockspace and docking layout
        dockspace.draw(addr showConquest, views, addr dockTop, addr dockBottom, addr dockTopLeft, addr dockTopRight)
        
        #[
            WebSocket communication with the team server
        ]# 
        # Continuously send heartbeat messages
        connection.ws.sendHeartbeat()

        # Receive and parse websocket response message 
        let event = recvEvent(connection.ws.receiveMessage().get(), connection.sessionKey)
        case event.eventType:
        of CLIENT_KEY_EXCHANGE: 
            connection.sessionKey = deriveSessionKey(clientKeyPair, decode(event.data["publicKey"].getStr()).toKey())            
            connection.sendPublicKey(clientKeyPair.publicKey)

        of CLIENT_PROFILE:
           profile = parsetoml.parseString(event.data["profile"].getStr())
        
        of CLIENT_LISTENER_ADD: 
            let listener = event.data.to(UIListener)
            listenersTable.listeners.add(listener)

        of CLIENT_AGENT_ADD: 
            let agent = event.data.to(UIAgent)

            # The ImGui Multi Select only works well with seq's, so we maintain a
            # separate table of the latest agent heartbeats to have the benefit of quick and direct O(1) access
            sessionsTable.agents.add(agent)
            sessionsTable.agentActivity[agent.agentId] = agent.latestCheckin

            # Initialize position of console windows to bottom by drawing them once when they are added
            # By default, the consoles are attached to the same DockNode as the Listeners table (Default: bottom), 
            # so if you place your listeners somewhere else, the console windows show up somewhere else too
            # The only case that is not covered is when the listeners table is hidden and the bottom panel was split
            var agentConsole = Console(agent)
            consoles[agent.agentId] = agentConsole
            let listenersWindow = igFindWindowByName("Listeners") 
            if listenersWindow != nil and listenersWindow.DockNode != nil:
                igSetNextWindowDockID(listenersWindow.DockNode.ID, ImGuiCond_FirstUseEver.int32)
            else:
                igSetNextWindowDockID(dockBottom, ImGuiCond_FirstUseEver.int32)
            consoles[agent.agentId].draw(connection)
            consoles[agent.agentId].showConsole = false

        of CLIENT_AGENT_CHECKIN: 
            sessionsTable.agentActivity[event.data["agentId"].getStr()] = event.timestamp

        of CLIENT_AGENT_PAYLOAD: 
            let payload = decode(event.data["payload"].getStr())
            try: 
                let outFilePath = fmt"{CONQUEST_ROOT}/bin/monarch.x64.exe"

                # TODO: Using native file dialogs to have the client select the output file path (does not work in WSL) 
                # let outFilePath = callDialogFileSave("Save Payload") 

                writeFile(outFilePath, payload)
            except IOError:
                discard 

        of CLIENT_CONSOLE_ITEM: 
            let agentId = event.data["agentId"].getStr() 
            consoles[agentId].addItem(
                cast[LogType](event.data["logType"].getInt()), 
                event.data["message"].getStr(), 
                event.timestamp
            )
        
        of CLIENT_EVENTLOG_ITEM: 
            eventlog.addItem(
                cast[LogType](event.data["logType"].getInt()), 
                event.data["message"].getStr(), 
                event.timestamp
            )
        
        else: discard 

        # Draw/update UI components/views
        if showSessionsTable: sessionsTable.draw(addr showSessionsTable)   
        if showListeners: listenersTable.draw(addr showListeners, connection)
        if showEventlog: eventlog.draw(addr showEventlog)

        # Show console windows
        var newConsoleTable: Table[string, ConsoleComponent]
        for agentId, console in consoles.mpairs():
            if console.showConsole:
                # Ensure that new console windows are docked to the bottom panel by default
                igSetNextWindowDockID(dockBottom, ImGuiCond_FirstUseEver.int32)
                console.draw(connection)    
                newConsoleTable[agentId] = console
            
        # Update the consoles table with only those sessions that have not been closed yet
        # This is done to ensure that closed console windows can be opened again
        consoles = newConsoleTable

        #  igShowDemoWindow(nil)

        # render
        app.render()

        if not showConquest: 
            app.handle.setWindowShouldClose(true)

when isMainModule:
    import cligen; dispatch main