Class: Levels::Setup::Input

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

Overview

This class transforms any supported object into Level data. The object can be any of:

* A file path to Ruby, JSON or YAML
* Ruby, JSON or YAML code
* An object that responds to `#read(level)`.

Instance Method Summary collapse

Constructor Details

#initialize(source) ⇒ Input 



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# File 'lib/levels/setup.rb', line 84

def initialize(source)
  @source = source
end

Instance Method Details

#identify ⇒ Object

Determine the format of the source and read it from disk if it’s a file.



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# File 'lib/levels/setup.rb', line 109

def identify
  if @source.respond_to?(:read)
    return :custom, @source
  end
  pn = Pathname.new(@source)
  if pn.exist?
    case pn.extname
    when ".rb"           then [:ruby, pn.read, pn.to_s, 1]
    when ".json"         then [:json, pn.read]
    when ".yaml", ".yml" then [:yaml, pn.read]
    else raise ArgumentError, "Could not identify the file type: #{pn.extname}"
    end
  else
    case @source
    when /\A\w*{/     then [:json, @source]
    when /\A---$/     then [:yaml, @source]
    when /\A\w*group/ then [:ruby, @source, "Code from String", 1]
    else raise ArgumentError, "Could not identify the source: #{@source.inspect}"
    end
  end
end

#input ⇒ Object

Returns a Levels::Input. Raises an ArgumentError if the format couldn’t be determined.



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# File 'lib/levels/setup.rb', line 96

def input
  format, source, *args = identify
  case format
  when :custom then source
  when :ruby   then Levels::Input::Ruby.new(source, *args)
  when :json   then Levels::Input::JSON.new(source)
  when :yaml   then Levels::Input::YAML.new(source)
  else raise ArgumentError, "Could not identify the format: #{format.inspect}"
  end
end

#read(level) ⇒ Object

Read the input into a Level. Raises an ArgumentError if the source cannot be used as an input.



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# File 'lib/levels/setup.rb', line 90

def read(level)
  input.read(level)
end