Class: LFA::Router::Config

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tree, dirname) ⇒ Config

Returns a new instance of Config.



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# File 'lib/LFA/router/config.rb', line 22

def initialize(tree, dirname)
  # TODO: path-method-to-function cache
  raise "functions is not specified" unless tree[:functions]
  raise "resources is not specified" unless tree[:resources]
  @functions = Hash[*(tree[:functions].map{|f| Function.new(f, dirname) }.map{|f| [f.name, f] }.flatten)]
  @resources = tree[:resources].map{|r| Resource.new(r, @functions) }
end

Instance Attribute Details

#functions ⇒ Object (readonly)

Returns the value of attribute functions.



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# File 'lib/LFA/router/config.rb', line 12

def functions
  @functions
end

#resources ⇒ Object (readonly)

Returns the value of attribute resources.



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# File 'lib/LFA/router/config.rb', line 12

def resources
  @resources
end

Class Method Details

.parse(yaml_filename) ⇒ Object 



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# File 'lib/LFA/router/config.rb', line 14

def self.parse(yaml_filename)
  tree = File.open(yaml_filename) do |file|
    YAML.load(file.read, symbolize_names: true, aliases: true)
  end
  dirname = File.dirname(File.absolute_path(yaml_filename))
  Config.new(tree, dirname)
end

Instance Method Details

#dig(path, method) ⇒ Object 



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# File 'lib/LFA/router/config.rb', line 30

def dig(path, method)
  raise "invalid path" unless path.start_with?("/")
  parts = if path == "/"
            ["/"]
          else
            path.split("/").filter{|str| str.size > 0 }.map{|part| "/" + part}
          end
  resource = self
  path_parameters = {}
  parts.each_with_index do |part, index|
    resource = resource.resources.find{|r| r.is_wildcard? || r.path == part }
    if resource
      if resource.is_wildcard? && resource.is_greedy_wildcard?
        path_parameters[resource.parameter_name] = (parts[index..-1].join)[1..-1] # omit heading '/'
        break
      elsif resource.is_wildcard?
        path_parameters[resource.parameter_name] = part[1..-1] # omit heading '/'
      end
    else # resource == nil
      break
    end
  end
  if resource
    if resource.is_greedy_wildcard?
      MatchedFunction.new(
        function: resource.methods.fetch(:ANY),
        path_parameters: path_parameters,
      )
    else
      func = resource.methods[method.to_sym]
      if func
        MatchedFunction.new(
          function: func,
          path_parameters: path_parameters.size > 0 ? path_parameters : nil,
        )
      else
        nil
      end
    end
  else
    nil # when the resource is not found
  end
end