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module Settingslogic
# A simple settings solution using a YAML file. See README for more information.
class Settings < Hash
class << self
def name # :nodoc:
instance.key?("name") ? instance.name : super
end
# Resets the singleton instance. Useful if you are changing the configuration on the fly. If you are changing the configuration on the fly you should consider creating instances.
def reset!
@instance = nil
end
private
def instance
@instance ||= new
end
def method_missing(name, *args, &block)
instance.send(name, *args, &block)
end
end
attr_accessor :_settings
# Initializes a new settings object. You can initialize an object in any of the following ways:
#
# Settings.new(:application) # will look for config/application.yml
# Settings.new("application.yaml") # will look for application.yaml
# Settings.new("/var/configs/application.yml") # will look for /var/configs/application.yml
# Settings.new(:config1 => 1, :config2 => 2)
#
# Basically if you pass a symbol it will look for that file in the configs directory of your rails app, if you are using this in rails. If you pass a string it should be an absolute path to your settings file.
# Then you can pass a hash, and it just allows you to access the hash via methods.
def initialize(name_or_hash = Config.settings_file)
case name_or_hash
when Hash
self.update name_or_hash
when String, Symbol
root_path = defined?(RAILS_ROOT) ? "#{RAILS_ROOT}/config/" : ""
file_path = name_or_hash.is_a?(Symbol) ? "#{root_path}#{name_or_hash}.yml" : name_or_hash
self.update YAML.load(ERB.new(File.read(file_path)).result).to_hash
self.update self[RAILS_ENV] if defined?(RAILS_ENV)
else
raise ArgumentError.new("Your settings must be a hash, a symbol representing the name of the .yml file in your config directory, or a string representing the abosolute path to your settings file.")
end
define_settings!
end
private
def method_missing(name, *args, &block)
raise NoMethodError.new("no configuration was specified for #{name}")
end
def define_settings!
self.each do |key, value|
case value
when Hash
instance_eval <<-"end_eval", __FILE__, __LINE__
def #{key}
@#{key} ||= self.class.new(self["#{key}"])
end
end_eval
else
instance_eval <<-"end_eval", __FILE__, __LINE__
def #{key}
@#{key} ||= self["#{key}"]
end
end_eval
end
end
end
end
end
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