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https://github.com/technix/ham_radio.git
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32 lines
979 B
Lua
32 lines
979 B
Lua
function ham_radio.validate_frequency(frequency)
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local num_freq = tonumber(frequency)
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local freq = tostring(num_freq)
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return freq == frequency
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and num_freq ~= nil
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and num_freq == math.floor(num_freq)
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and num_freq >= ham_radio.settings.frequency.min
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and num_freq <= ham_radio.settings.frequency.max
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end
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function ham_radio.find_transmitters(frequency)
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local transmitter_list = {}
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for key, transmitter in pairs(ham_radio.transmitters) do
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if transmitter.frequency == frequency then
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transmitter_list[key] = transmitter
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end
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end
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return transmitter_list
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end
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function ham_radio.find_free_frequency()
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local frequency = -1
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while frequency == -1 do
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frequency = tostring(math.floor(math.random(ham_radio.settings.frequency.min, ham_radio.settings.frequency.max)));
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local are_there_transmitters = ham_radio.find_transmitters(frequency)
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if next(are_there_transmitters) then
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frequency = -1
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end
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end
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return frequency
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end
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