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48 lines
1.5 KiB
48 lines
1.5 KiB
require 'dotenv'
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# Hot Live Constants
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module HotConstants
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HOTENV = {} # rubocop:disable Style/MutableConstant
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LOGGER = SemanticLogger[to_s]
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class << self
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def initialize
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@on_change_listeners = {}
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env_sample = Dotenv.parse('.env.sample') # TODO: able to detect add/remove, then either call define_method or undef_method!
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env_sample.each do |key, value|
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dkey = key.downcase
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method = method_from_value(value)
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singleton_class.define_method(dkey) { method.call(key, value) }
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LOGGER.info("create method <#{dkey}> performing <#{method.name}> with default value <#{value}> ")
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end
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reload!
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end
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def reload!
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HOTENV.replace Dotenv.parse # TODO: detect true changes before processing block below (or yield)
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@on_change_listeners.each_pair do |key, block|
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old_value = nil # TODO: remember last previous value
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new_value = method(key).call
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block.call(new_value)
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end
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end
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def on_change(key, &block)
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@on_change_listeners[key.downcase.to_sym] = block
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end
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private
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def load_boolean(key, default) = HOTENV.fetch(key, default).to_s.downcase == 'true'
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def load_integer(key, default) = HOTENV.fetch(key, default).to_i
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def load_string(key, default) = HOTENV.fetch(key, default)
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def method_from_value(value)
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case value.downcase
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when /^(true|false)$/ then method(:load_boolean)
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when /^\d+$/ then method(:load_integer)
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else method(:load_string)
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end
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end
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end
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end
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