Class: Resat::Config

Inherits:
Object
  • Object
show all
Defined in:
lib/config.rb

Constant Summary collapse

DEFAULT_FILE = 
'config/resat.yaml'
DEFAULT_SCHEMA_DIR = 
File.expand_path(File.join(File.dirname(__FILE__), '..', 'schemas'))
DEFAULTS = 
{
  'base_url' => '',
  'use_ssl' => false,
  'variables' => {}
}

Instance Method Summary collapse

Constructor Details

#initialize(filename, schemasdir) ⇒ Config 



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# File 'lib/config.rb', line 46

def initialize(filename, schemasdir)
  (self.methods - (Object.instance_methods + [ 'init', 'valid?', 'method_missing' ])).each { |m| self.class.send(:remove_method, m.to_sym) }
  schemafile = File.join(schemasdir || DEFAULT_SCHEMA_DIR, 'config.yaml')
  unless File.exists?(schemafile)
    Log.error("Missing configuration file schema '#{schemafile}'")
    @valid = false
    return
  end
  schema    = Kwalify::Yaml.load_file(schemafile)
  validator = Kwalify::Validator.new(schema)
  parser    = Kwalify::Yaml::Parser.new(validator)
  @valid    = true
  @config   = { 'use_ssl' => false, 'username' => nil, 'password' => nil, 'port' => nil }
  cfg_file  = filename || DEFAULT_FILE
  config    = parser.parse_file(cfg_file)
  if parser.errors.empty?
    if config.nil?
      Log.error("Configuration file '#{cfg_file}' is empty.")
      @valid = false
    else
      @config.merge!(config)
      # Dynamically define the methods to forward to the config hash
      @config.each_key do |meth|
        self.class.send(:define_method, meth) do |*args|
          @config[meth] || DEFAULTS[meth]
        end
      end
    end
  else
    errors = parser.errors.inject("") do |msg, e|
      msg << "#{e.linenum}:#{e.column} [#{e.path}] #{e.message}\n\n"
    end
    Log.error("Configuration file '#{cfg_file}' is invalid:\n#{errors}")
    @valid = false
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(*args) ⇒ Object 



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# File 'lib/config.rb', line 87

def method_missing(*args)
  nil
end

Instance Method Details

#valid? ⇒ Boolean 



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# File 'lib/config.rb', line 83

def valid?
  @valid
end