Class: TypeStruct::Generator

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

Overview

Respects:

http://json2struct.mervine.net/
https://mholt.github.io/json-to-go/

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Generator

Returns a new instance of Generator.



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# File 'lib/type_struct/generator.rb', line 6

def initialize
  @io = StringIO.new
end

Instance Method Details

#parse(name, h) ⇒ Object

call-seq:

parse(name, hash) -> String

Auto Generate TypeStruct definition from Hash object.

require ‘type_struct/generator’

puts TypeStruct::Generator.new.parse(“AutoGeneratedStruct”, ‘world!’) # => “AutoGeneratedStruct = TypeStruct.new(\nhello: String,\n)\n”

See also type_struct/generator/json,yaml.rb



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# File 'lib/type_struct/generator.rb', line 21

def parse(name, h)
  io = StringIO.new
  io.puts "#{name} = TypeStruct.new("
  h.each do |key, value|
    io.puts "  #{key}: #{parse_one(io, key, value)},"
  end
  io.puts ")"
  @io.print io.string
  @io.string
end

#parse_one(io, key, value) ⇒ Object 



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# File 'lib/type_struct/generator.rb', line 32

def parse_one(io, key, value)
  case value
  when Array
    if value.empty?
      "Array"
    else
      "ArrayOf(#{parse_one(io, key, value.first)})"
    end
  when Hash
    if value.empty?
      "Hash"
    else
      type_struct = key.to_s.gsub(/e?s\z/, '').split('_').map(&:capitalize).join
      parse(type_struct, value)
      type_struct
    end
  when NilClass
    "Object"
  when TrueClass, FalseClass
    "TrueClass | FalseClass"
  else
    value.class.to_s
  end
end