logic/helpers/hash.rb


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62

# frozen_string_literal: true

module NanoBot
  module Logic
    module Helpers
      module Hash
        def self.deep_merge(hash1, hash2)
          hash1.merge(hash2) do |_key, old_val, new_val|
            if old_val.is_a?(::Hash) && new_val.is_a?(::Hash)
              deep_merge(old_val, new_val)
            else
              new_val
            end
          end
        end

        def self.symbolize_keys(object)
          case object
          when ::Hash
            object.each_with_object({}) do |(key, value), result|
              result[key.to_sym] = symbolize_keys(value)
            end
          when Array
            object.map { |e| symbolize_keys(e) }
          else
            object
          end
        end

        def self.stringify_keys(object)
          case object
          when ::Hash
            object.each_with_object({}) do |(key, value), result|
              result[key.to_s] = stringify_keys(value)
            end
          when Array
            object.map { |e| stringify_keys(e) }
          else
            object
          end
        end

        def self.fetch(object, path)
          node = object

          return nil unless node

          path.each do |key|
            unless node.is_a?(::Hash)
              node = nil
              break
            end
            node = node[key]
            break if node.nil?
          end

          node
        end
      end
    end
  end
end