Class: ArelConverter::Translator::Options

Inherits:
Base
  • Object
show all
Defined in:
lib/arel_converter/translators/options.rb

Constant Summary collapse

LINE_LENGTH = 
1_000

Instance Method Summary collapse

Methods inherited from Base

#format_for_hash, parse, #post_processing, translate

Instance Method Details

#hash_to_arel(lhs, rhs) ⇒ Object 



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# File 'lib/arel_converter/translators/options.rb', line 41

def hash_to_arel(lhs, rhs)
  key = lhs.sub(':','')
  case key
  when 'conditions'
    key = 'where'
  when 'include'
    key = 'includes'
  when 'none', 'reverse_order'
    return key
  end
  rhs = rhs.gsub(/\A\[(.*)\]\z/, '\1').gsub(/\A\{(.*)\}\z/, '\1')
  "#{key}(#{rhs})"
end

#logger ⇒ Object 



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# File 'lib/arel_converter/translators/options.rb', line 7

def logger
  @logger ||= setup_logger
end

#process_call(exp) ⇒ Object 



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# File 'lib/arel_converter/translators/options.rb', line 33

def process_call(exp)
  if valid_arel_method?(exp[1])
    @depth ||= 0
    @depth += 1 if @depth == 0
  end
  super
end

#process_hash(exp) ⇒ Object

:nodoc:



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# File 'lib/arel_converter/translators/options.rb', line 11

def process_hash(exp) # :nodoc:
  @depth ||= 0
  @depth += 1

  result = []

  until exp.empty?
    lhs = process(exp.shift)
    rhs = process(exp.shift)
    result << (@depth > 1 ? format_for_hash(lhs,rhs) : hash_to_arel(lhs,rhs))
  end

  @depth -= 1

  case @depth
  when 0
    result.empty? ? "" : result.join('.')
  else
    result.empty? ? "{}" : "{ #{result.join(', ')} }"
  end
end

#process_if(exp) ⇒ Object

:nodoc:



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# File 'lib/arel_converter/translators/options.rb', line 105

def process_if(exp) # :nodoc:
  expand = Ruby2Ruby::ASSIGN_NODES.include? exp.first.first
  c = process exp.shift
  t = process exp.shift
  f = process exp.shift

  c = "(#{c.chomp})" if c =~ /\n/

  if t then
    unless expand then
      if f then
        r = "#{c} ? (#{t}) : (#{f})"
        r = nil if r =~ /return/ # HACK - need contextual awareness or something
      else
        r = "#{t} if #{c}"
      end
      return r if r and (@indent+r).size < LINE_LENGTH and r !~ /\n/
    end

    r = "if #{c} then\n#{indent(t)}\n"
    r << "else\n#{indent(f)}\n" if f
    r << "end"

    r
  elsif f
    unless expand then
      r = "#{f} unless #{c}"
      return r if (@indent+r).size < LINE_LENGTH and r !~ /\n/
    end
    "unless #{c} then\n#{indent(f)}\nend"
  else
    # empty if statement, just do it in case of side effects from condition
    "if #{c} then\n#{indent '# do nothing'}\nend"
  end
end

#process_iter(exp) ⇒ Object

Have to override super class to get the overridden LINE_LENGTH constant to work



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# File 'lib/arel_converter/translators/options.rb', line 57

def process_iter(exp) # :nodoc:
  iter = process exp.shift
  args = exp.shift
  body = exp.empty? ? nil : process(exp.shift)

  args = case args
         when 0 then
           iter = '->' # no args? let's use a stubby
           ''
         else
           a = process(args)[1..-2]
           a = " |#{a}|" unless a.empty?
           a
         end
  
  b, e = if iter == "END" then
           [ "{", "}" ]
         else
           [ "do", "end" ]
         end

  iter.sub!(/\(\)$/, '')

  # REFACTOR: ugh
  result = []
  result << "#{iter} {"
  result << args
  if body then
    result << " #{body.strip} "
  else
    result << ' '
  end
  result << "}"
  result = result.join
  return result if result !~ /\n/ and result.size < LINE_LENGTH

  result = []
  result << "#{iter} #{b}"
  result << args
  result << "\n"
  if body then
    result << indent(body.strip)
    result << "\n"
  end
  result << e
  result.join
end