Class: Wallaby::Sorting::HashBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/services/wallaby/sorting/hash_builder.rb

Overview

Turn a string e.g.'name asc,id desc' into sort hash e.g.{name: 'asc', id: 'desc'}

Constant Summary collapse

SORT_REGEX = 
/(([^\s,]+)\s+(asc|desc))\s*,?\s*/i.freeze

Class Method Summary collapse

Class Method Details

.build(sort_string) ⇒ Hash

Turn a string e.g.'name asc,id desc' into sort hash e.g.{name: 'asc', id: 'desc'}

Parameters:

  • sort_string (String)

Returns:

  • (Hash) —

    { field_name => 'asc|desc' }



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# File 'lib/services/wallaby/sorting/hash_builder.rb', line 12

def self.build(sort_string)
  ::ActiveSupport::HashWithIndifferentAccess.new.tap do |hash|
    (sort_string || EMPTY_STRING).scan(SORT_REGEX) { |_, key, order| hash[key] = order }
  end
end

.to_str(hash) ⇒ Object 



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# File 'lib/services/wallaby/sorting/hash_builder.rb', line 18

def self.to_str(hash)
  hash.each_with_object(EMPTY_STRING.dup) do |(name, sort), str|
    next unless /\A(asc|desc)( nulls (first|last))?\Z/i.match?(sort)

    str << (str == EMPTY_STRING ? str : COMMA)
    str << name.to_s << SPACE << sort << (block_given? ? yield(name) : EMPTY_STRING)
  end
end