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require 'yaml'
class Settings
def initialize
@settings = {}
@setting_callbacks = {}
end
def on_change(key, &proc)
@setting_callbacks[key] ||= []
@setting_callbacks[key] << proc
end
def load(path)
File.open(path, 'r') { |file|
load_settings_from_file(file)
} rescue nil
self
end
def save(path)
File.open(path, 'w') { |file|
save_settings_to_file(file)
} rescue nil
self
end
def [](key)
@settings[key]
end
def []=(key, value)
return if (@settings[key] && @settings[key] == value)
@settings[key] = value
@setting_callbacks[key].each { |proc| proc.call(value) } if @setting_callbacks[key]
end
private
def load_settings_from_file(file)
settings = YAML.load(file)
@settings = settings if settings.is_a? Hash
end
def save_settings_to_file(file)
YAML.dump(@settings, file)
end
end
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