factorio-scenario-ExpCluster/exp_legacy/module/modules/addons/chat-popups.lua

--- Creates flying text entities when a player sends a message in chat;
-- also displays a ping above users who are named in the message
-- @addon Chat-Popups

local FloatingText = require("modules/exp_util/floating_text")
local Event = require("modules/exp_legacy/utils/event") --- @dep utils.event
local config = require("modules.exp_legacy.config.popup_messages") --- @dep config.popup_messages

local send_text = FloatingText.print_as_player -- (player, text)

Event.add(defines.events.on_console_chat, function(event)
    if not event.player_index or event.player_index < 1 then return end
    local player = game.players[event.player_index]

    -- Some basic sanity checks
    if not player then return end
    if not event.message then return end

    -- Sends the message as text above them
    if config.show_player_messages then
        send_text(player, {'chat-popup.message', player.name, event.message})
    end

    if not config.show_player_mentions then return end

    -- Makes lower and removes white space from the message
    local search_string = event.message:lower():gsub("%s+", "")

    -- Loops over online players to see if they name is included
    for _, mentioned_player in pairs(game.connected_players) do
        if mentioned_player.index ~= player.index then
            if search_string:find(mentioned_player.name:lower(), 1, true) then
                send_text(mentioned_player, {'chat-popup.ping', player.name})
            end
        end
    end

end)