print("Notification board v1.0")

-- Number of rows
local lineSize = 12

-- Text array
local arr = {}

-- Initialize the array
for i = 1, lineSize do
    arr[i] = ""
end

-- Add text
function addText(text)

    -- Shift the position of the text
    for i = 0, lineSize - 2 do
        arr[lineSize-i] = arr[lineSize-i-1]
    end

    -- Shift the latest text to the top
    arr[1] = text

    -- Synthesize the text
    for i = 2, lineSize do
        text = text..'\n'..arr[i]
    end

    -- Display the text
    vci.assets._ALL_SetText("Text", text)
end

-- Receive notification
function onMessage(sender, name, message)
    local text

    if message == 'joined' then
        text = sender.name..'joined the room.'
    elseif message == 'left' then
        text = sender.name..'left the room.'
    end

    print(text)

    if vci.assets.IsMine then
        addText(text)
    end
end

-- Subscribe the notification
vci.message.On('notification', onMessage)

-- Dummy notification for testing
function test()
    for i = 1, 50 do
        local sender = { name='Test'..i }
        local message = 'joined'
        if i % 2 == 0 then
            message = 'left'
        end
        onMessage(sender, 'notification', message)
    end
end

-- Run the test code
test()