Reduce_Read_Time.lua

-- Reduce Read Time
-- require "TimedActions/ISReadABook"

--SIMPLE INJECTION

local old_fn = ISReadABook.new; -- We put the link to the old function in a variable "old_fn".

-- Replacing the old function with new one.
-- The old function continues to exist and we have the link in the variable old_fn.
function ISReadABook:new(...) -- "..." means any parameters. ":" means unlisted "self" parameter.
    local o = old_fn(self, ...); -- We call old function and give all parameters to it.
    -- The result o is saved in a local variable o.
    -- AFTER old function is finished, we apply our patch.
    -- Sadly, injection in the middle of the function (if possible) should be more complicated.
    -- So we keep it simple:
    -- We only have to take into account that at the end of the old function, time can be overwritten by 1.
    if o.maxTime ~= 1 then
        o.maxTime = o.maxTime * 0.5;
    end
    return o; --We return o as old function did.
end
-- Now nobody (except us) has access to the old function.