Event Listener?

Questions
3

You probably also only want to check for changes happening to the score, and only sending the message when such a change has brought the score over one of these levels. If the score is only incremented and this doesn’t happen for too many things, something like this could work:

function init(self)
    self.score_levels = {250, 500}
end

local notify(self, score)
    -- for each listener:
         msg.post(listener, "score_reached", {score = score})
end

local function incr_score(self, value)
    self.score = self.score + value
    local next_level = self.score_levels[1]
    while (next_level and next_level <= self.score) do
         notify(self, next_level)
         table.remove(self.score_levels, 1)
         next_level = self.score_levels[1]
    end
end
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