64 lines
1.8 KiB
Ruby
64 lines
1.8 KiB
Ruby
class Weather
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def self.get_weather(zone, hash = hash(get_seed))
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total = 0
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APP_DATA[zone][:weather].each do |arr|
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name, rate = arr
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if (total += rate) > hash
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return name
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end
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end
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end
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def self.forecast(zone, seed = get_seed, count = 50)
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res = []
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prev_hash = hash(seed - 1)
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prev_weather = get_weather(zone, prev_hash)
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count.times do |_|
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curr_hash = hash(seed)
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curr_weather = get_weather(zone, curr_hash)
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res.push({ zone: zone, prev_weather: prev_weather, curr_weather: curr_weather, weather_name: get_weather_name(curr_weather), seed: seed, time: Time.at(seed * 1400000.0 / 1000) })
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prev_hash = curr_hash
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prev_weather = curr_weather
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seed += 1
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end
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res
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end
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def self.round_to_last_weather_time(time)
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last_hour = time.hour / 8 * 8
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time.change(hour: last_hour)
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end
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def self.get_weather_name(name)
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case name
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when "fair" then "Fair Skies"
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when "showers" then "Showers"
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when "gales" then "Gales"
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when "blizzards" then "Blizzards"
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when "heat" then "Heat"
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when "thunder" then "Thunderstorms"
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when "gloom" then "Gloom"
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when "snow" then "Snow"
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when "fog" then "Fog"
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when "umbral_wind" then "Umbral Wind"
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else "Unknown Weather"
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end
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end
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def self.get_seed
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(Time.now.utc.to_i * 1000 / 1400000.0).floor
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end
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def self.hash(seed = get_seed)
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base = (seed / 3).floor * 100 + ((seed + 1) % 3) * 8
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# Ruby has no other convenient way to convert a signed integer into an unsigned one
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step1 = [ ((base << 11) ^ base) ].pack("L").unpack("L").first
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step2 = [ (([ (step1 >> 8) ].pack("L").unpack("L").first.to_i ^ step1)) ].pack("L").unpack("L").first.to_i
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step2 % 100
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end
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def self.unsigned_right(input, by)
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input << by & 0xFF00 | input >> by & 0xFF
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end
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end
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