Reverse Auction Logic

public class ChatHub : Hub
{
    // Called when a vendor submits a new bid
    [HubMethodName("sendBid")]
    public void SendBid()
    {
        IHubContext context = GlobalHost.ConnectionManager.GetHubContext<ChatHub>();
        context.Clients.All.updatedData();  // Broadcast to all
    }

    // Called for general data updates (rank changes, time extensions)
    [HubMethodName("sendData")]
    public void SendData()
    {
        IHubContext context = GlobalHost.ConnectionManager.GetHubContext<ChatHub>();
        context.Clients.All.send();
    }
}

// Initialize SignalR connection
var hubNotif = $.connection.chatHub;

// Handle real-time bid updates
hubNotif.client.updatedData = function() {
    $.ajax({
        url: RootUrl + 'ReverseAuction/VendorLiveRA',
        data: { RASlno: RASlno, SignalRChat: "true" },
        success: function(data) {
            $('#vendorRank').text(data.InitialRank);  // Update rank
            $('#RAToMinute').val(data.ToTimeMinutes);  // Update time if extended
        }
    });
};

// Start connection and submit bids
$.connection.hub.start().done(function() {
    $("#btn_save").click(function() {
        $.ajax({
            url: RootUrl + 'ReverseAuction/VendorLiveRA',
            type: 'POST',
            data: formData,
            success: function() {
                hubNotif.server.sendBid();   // Broadcast to all
                hubNotif.server.sendData();
            }
        });
    });
});

function validateDiscount(discountType, discountValue, initialBid, minDecrement) {
    if (discountType === 'P') {  // Percentage-based
        if (discountValue < minDecrement || discountValue >= 100) {
            return { valid: false,
                     error: `Discount must be >= ${minDecrement}% and < 100%` };
        }
        var newBidPrice = initialBid - (initialBid * discountValue / 100);
    } else if (discountType === 'A') {  // Amount-based
        if (discountValue < minDecrement || discountValue >= initialBid) {
            return { valid: false,
                     error: `Discount must be >= ${minDecrement} and < ${initialBid}` };
        }
        var newBidPrice = initialBid - discountValue;
    }
    return { valid: true, newBidPrice: newBidPrice };
}