button-api

-- this is all completely untested so it might not work xd

local BUTTONS = {}
local CLICKED = {}

function createButton(id, x, y, w, h, callback)
    local x2 = x + w - 1
    local y2 = y + h - 1
    local button = {
        x1 = x, y1 = y,
        x2 = x2, y2 = y2,
        id = id, callback = callback
    }

    table.insert(BUTTONS, id, button)
    return button
end

function getHitScan(x, y)
    for key, value in pairs(BUTTONS) do
        if (x >= value.x1 and x <= value.x2) then
            if (y >= value.y1 and y <= value.y2) then
                return value
            end
        end
    end

    return nil
end

function onScreenHit(x, y)
    local hit = getHitScan(x, y)
    if (hit == nil) then
        return
    end

    table.insert(CLICKED, hit.id, hit)
    hit.callback(x, y, hit.id)
end

function pullClickEvent()
    local mouse,x,y = os.pullEvent("mouse_click")
    onScreenHit(x, y)
end

function getButtons()
    return BUTTONS
end

function getClickedButtons()
    return CLICKED
end