Notes

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-- Constants and variables
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local player_notes  = database.read("player_notes") or {}
local player_list   = ui.reference("PLAYERS", "Players", "Player list")
local callbacks     = {}

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-- Utility functions
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local function update_players()
    for i=0, 64 do
        local steamid = entity.get_steam64(i)
        if steamid ~= 0 and steamid ~= nil then
            if player_notes[steamid] == nil then
                player_notes[steamid] = string.format("Player added at: %d:%d:%d", client.system_time())
            end
        end
    end
end

local function set_callback(reference, func)
    if callbacks[reference] == nil then
        callbacks[reference] = {ui.get(reference)}
    end
    table.insert(callbacks[reference], func)
end

local function handle_callbacks()
    for reference, data in pairs(callbacks) do
        local value = ui.get(reference)
        local call = value ~= data[1]
        if call then
            for i=2, #data do
                xpcall(data[i], client.error_log, reference)
            end
        end
        data[1] = value
    end
    client.delay_call(0.01, handle_callbacks)
end

handle_callbacks()
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-- Menu handling
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local enabled   = ui.new_checkbox("PLAYERS", "Adjustments", "Player notes")
local note_text = ui.new_textbox("PLAYERS", "Adjustments", "\nNote textbox")

local function handle_menu()
    local state = ui.get(enabled)
    ui.set_visible(note_text, state)
end

handle_menu()
ui.set_callback(enabled, handle_menu)

local function update_note_text(ref)
    if not ui.get(enabled) then
        return
    end
    local entindex = ui.get(ref)
    local ent_steam64 = entity.get_steam64(entindex)
    if ent_steam64 == nil then
        return
    end
    if player_notes[ent_steam64] == nil then update_players() end
    ui.set(note_text, player_notes[ent_steam64])
end

local function update_textbox(ref)
    if not ui.get(enabled) then
        return
    end
    local note = ui.get(ref)
    local entindex = ui.get(player_list)
    local ent_steam64 = entity.get_steam64(entindex)
    if ent_steam64 == nil then
        return
    end
    player_notes[ent_steam64] = note
end

set_callback(note_text, update_textbox)
set_callback(player_list, update_note_text)

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-- Game event handling
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local function player_connect()
    if not ui.get(enabled) then
        return
    end
    update_players()
end

local function round_start()
    if not ui.get(enabled) then
        return
    end
    update_players()
end

local function shutdown()
    database.write("player_notes", player_notes)
end

client.set_event_callback("shutdown", shutdown)
client.set_event_callback("round_start", round_start)
client.set_event_callback("player_connect", player_connect)