spectator mode

maps/wave_of_death/WoD.lua

@@ -19,6 +19,28 @@ function soft_teleport(player, destination)
 	player.teleport(pos, surface)
 end
 
+local function spectate_button(player)
+	if player.gui.top.spectate_button then return end
+	local button = player.gui.top.add({type = "button", name = "spectate_button", caption = "Spectate"})
+	button.style.font = "default-bold"
+	button.style.font_color = {r = 0.0, g = 0.0, b = 0.0}
+	button.style.minimal_height = 38
+	button.style.minimal_width = 38
+	button.style.top_padding = 2
+	button.style.left_padding = 4
+	button.style.right_padding = 4
+	button.style.bottom_padding = 2
+end
+
+local function create_spectate_confirmation(player)
+	if player.gui.center.spectate_confirmation_frame then return end
+	local frame = player.gui.center.add({type = "frame", name = "spectate_confirmation_frame", caption = "Are you sure you want to spectate? This can not be undone."})
+	frame.style.font = "default"
+	frame.style.font_color = {r = 0.3, g = 0.65, b = 0.3}
+	frame.add({type = "button", name = "confirm_spectate", caption = "Spectate"})
+	frame.add({type = "button", name = "cancel_spectate", caption = "Cancel"})
+end
+
 local function autojoin_lane(player)
 	local lowest_player_count = 256
 	local lane_number = 1
@@ -38,8 +60,9 @@ end
 
 local function on_player_joined_game(event)
 	init()
-	
+		
 	local player = game.players[event.player_index]
+	spectate_button(player)
 	if player.online_time == 0 then autojoin_lane(player) return end
 	
 	if global.wod_lane[tonumber(player.force.name)].game_lost == true then
@@ -71,6 +94,30 @@ local function on_tick(event)
 	game_status.restart_server()
 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 == "cancel_spectate" then player.gui.center["spectate_confirmation_frame"].destroy() return end
+	if event.element.name == "confirm_spectate" then
+		player.gui.center["spectate_confirmation_frame"].destroy()
+		game.permissions.get_group("spectator").add_player(player)
+		player.force = game.forces.player
+		if player.character then player.character.die() end
+		return 
+	end
+	if event.element.name == "spectate_button" then
+		if player.gui.center["spectate_confirmation_frame"] then
+			player.gui.center["spectate_confirmation_frame"].destroy()
+		else
+			create_spectate_confirmation(player)
+		end
+		return
+	end
+end
+
+event.add(defines.events.on_gui_click, on_gui_click)
 event.add(defines.events.on_tick, on_tick)
 event.add(defines.events.on_chunk_generated, on_chunk_generated)
 event.add(defines.events.on_entity_damaged, on_entity_damaged)

maps/wave_of_death/init.lua

@@ -20,6 +20,7 @@ local function init_surface()
 	game.map_settings.enemy_evolution.pollution_factor = 0
 	game.map_settings.pollution.enabled = false	
 	game.map_settings.enemy_expansion.enabled = false
+	game.difficulty_settings.technology_price_multiplier = 0.8
 	
 	return surface
 end
@@ -47,6 +48,34 @@ local function init_forces(surface)
 			end
 		end
 	end
+	
+	for i = 1, 4, 1 do
+		game.forces[i].set_friend("player", true)
+		game.forces["player"].set_friend(game.forces[i].name, true)
+	end
+	game.forces["player"].set_spawn_position({x = 32, y = 0}, surface)
+	
+	local p = game.permissions.create_group("spectator")
+	for action_name, _ in pairs(defines.input_action) do
+		p.set_allows_action(defines.input_action[action_name], false)
+	end	
+	local defs = {
+		defines.input_action.write_to_console,
+		defines.input_action.gui_click,
+		defines.input_action.gui_selection_state_changed,
+		defines.input_action.gui_checked_state_changed	,
+		defines.input_action.gui_elem_changed,
+		defines.input_action.gui_text_changed,
+		defines.input_action.gui_value_changed,
+		defines.input_action.start_walking,
+		defines.input_action.open_kills_gui,
+		defines.input_action.open_character_gui,
+		defines.input_action.edit_permission_group,
+		defines.input_action.toggle_show_entity_info,
+		defines.input_action.rotate_entity,
+		defines.input_action.start_research
+	}	
+	for _, d in pairs(defs) do p.set_allows_action(d, true) end
 end
 
 local function init_globals()

maps/wave_of_death/spectate.lua

@@ -0,0 +1,7 @@
+local function spectate_button()
+end
+
+local function on_gui_click()
+end
+
+event.add(defines.events.on_gui_click, on_gui_click)