ComfyFactorio/maps/wave_of_death/intro.lua

--luacheck: ignore
local event = require 'utils.event'

local info =
    [[
Hello Players,

on this map you battle with your team against up to 3 other teams.

Each team can call its own wave of biters and spitters at any time and they get stronger with each wave.
Each wave, when defeated, sends a percentage of their enemys to all other teams.

To call a wave, you have to rotate the loader.
But remember that you must also be able to defeat the enemy.

Your task is to defend your loader. If it is destroyed, you have lost!

A round is over when only one team has it's loader left.

Credits:
Map made by MewMew and Kyte
]]

local function create_map_intro_button(player)
    if player.gui.top['map_intro_button'] then
        return
    end
    local b = player.gui.top.add({type = 'sprite-button', caption = '?', name = 'map_intro_button', tooltip = 'Map Info'})
    b.style.font_color = {r = 0.1, g = 0.8, b = 0.1}
    b.style.font = 'heading-1'
    b.style.minimal_height = 38
    b.style.minimal_width = 38
    b.style.top_padding = 2
    b.style.left_padding = 4
    b.style.right_padding = 4
    b.style.bottom_padding = 2
end

local function create_map_intro(player)
    if player.gui.left['map_intro_frame'] then
        player.gui.left['map_intro_frame'].destroy()
    end
    local frame = player.gui.left.add {type = 'frame', name = 'map_intro_frame', direction = 'vertical'}

    local t = frame.add {type = 'table', column_count = 1}

    local b = frame.add {type = 'button', caption = 'Close', name = 'close_map_intro_frame', align = 'right'}
    b.style.font = 'default'
    b.style.minimal_height = 30
    b.style.minimal_width = 30
    b.style.top_padding = 2
    b.style.left_padding = 4
    b.style.right_padding = 4
    b.style.bottom_padding = 2

    local frame = t.add {type = 'frame'}
    local l = frame.add {type = 'label', caption = info}
    l.style.single_line = false
    l.style.font = 'heading-2'
    l.style.font_color = {r = 0.60, g = 0.8, b = 0.60}
end

local function on_player_joined_game(event)
    local player = game.players[event.player_index]
    create_map_intro_button(player)
    if player.online_time == 0 then
        create_map_intro(player)
    end
end

local function on_gui_click(event)
    if not event then
        return
    end
    if not event.element then
        return
    end
    if not event.element.valid then
        return
    end
    local player = game.players[event.element.player_index]
    if event.element.name == 'close_map_intro_frame' then
        player.gui.left['map_intro_frame'].destroy()
        return
    end
    if event.element.name == 'map_intro_button' then
        if player.gui.left['map_intro_frame'] then
            player.gui.left['map_intro_frame'].destroy()
        else
            create_map_intro(player)
        end
        return
    end
end

event.add(defines.events.on_player_joined_game, on_player_joined_game)
event.add(defines.events.on_gui_click, on_gui_click)