class RuboCop::Cop::Style::OneLineConditional

end
doo
else
boo
if foo
# good
if foo then boo end
boo if foo
foo ? boo : doo
# good
unless foo then boo else goo end
if foo then boo else doo end
# bad
@example
Checks for uses of if/then/else/end on a single line.
TODO: Make configurable.

def autocorrect(node) 

def autocorrect(node)
  lambda do |corrector|
    corrector.replace(node.source_range, replacement(node))
  end
end

def expr_replacement(node) 

def expr_replacement(node)
  return 'nil' if node.nil?
  requires_parentheses?(node) ? "(#{node.source})" : node.source
end

def keyword_with_changed_precedence?(node) 

def keyword_with_changed_precedence?(node)
  return false unless node.keyword?
  return true if node.prefix_not?
  node.arguments? && !node.parenthesized_call?
end

def message(node) 

def message(node)
  format(MSG, keyword: node.keyword)
end

def method_call_with_changed_precedence?(node) 

def method_call_with_changed_precedence?(node)
  return false unless node.send_type? && node.arguments?
  return false if node.parenthesized_call?
  !node.operator_method?
end

def on_normal_if_unless(node) 

def on_normal_if_unless(node)
  return unless node.single_line? && node.else_branch
  add_offense(node)
end

def replacement(node) 

def replacement(node)
  return to_ternary(node) unless node.parent
  if %i[and or].include?(node.parent.type)
    return "(#{to_ternary(node)})"
  end
  if node.parent.send_type? && node.parent.operator_method?
    return "(#{to_ternary(node)})"
  end
  to_ternary(node)
end

def requires_parentheses?(node) 

def requires_parentheses?(node)
  return true if %i[and or if].include?(node.type)
  return true if node.assignment?
  return true if method_call_with_changed_precedence?(node)
  keyword_with_changed_precedence?(node)
end

def to_ternary(node) 

def to_ternary(node)
  condition, if_branch, else_branch = *node
  "#{expr_replacement(condition)} ? " \
    "#{expr_replacement(if_branch)} : " \
    "#{expr_replacement(else_branch)}"
end