Module: Crystalline::MetadataFields::ClassMethods

Extended by:
T::Sig
Defined in:
lib/crystalline/metadata_fields.rb

Instance Method Summary collapse

Instance Method Details

#field(field_name, type, metadata = {}) ⇒ Object 



30
31
32
33
34
 
# File 'lib/crystalline/metadata_fields.rb', line 30

def field(field_name, type, metadata = {})
  attr_accessor field_name

  fields << Field.new(field_name, type, metadata)
end

#field_augmented? ⇒ Boolean

Returns:

  • (Boolean) 


36
37
38
 
# File 'lib/crystalline/metadata_fields.rb', line 36

def field_augmented?
  true
end

#fields ⇒ Object 



24
25
26
27
28
 
# File 'lib/crystalline/metadata_fields.rb', line 24

def fields
  @__fields__ = [] if @__fields__.nil?

  @__fields__
end

#from_dict(d) ⇒ Object 



71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
 
# File 'lib/crystalline/metadata_fields.rb', line 71

def from_dict(d)
  to_build = new

  fields.each do |field|
    field_type = field.type
    if T.nilable? field_type
      field_type = T.nilable_of(field_type)
    end

    key = "#{field.name}="
    lookup = field.metadata.fetch(:format_json, {}).fetch(:letter_case, nil).call
    value = d[lookup]
    
    # If field is not nilable, and the value is not in the dict, raise a KeyError
    raise KeyError, "key #{lookup} not found in hash" if value.nil? && !T.nilable?(field.type)
    # If field is nilable, and the value is not in the dict, just move to the next field
    next if value.nil?

    if T.arr? field_type
      inner_type = T.arr_of(field_type)
      unmarshalled_array = value.map { |f| unmarshal_single(inner_type, f) }
      to_build.send(key, unmarshalled_array)
    elsif T.hash? field_type
      val_type = T.hash_of(field_type)

      # rubocop:disable Style/HashTransformValues
      unmarshalled_hash = value.map { |k, v| [k, unmarshal_single(val_type, v)] }.to_h
      # rubocop:enable Style/HashTransformValues
      to_build.send(key, unmarshalled_hash)
    elsif T.union? field_type
      discriminator = field.metadata.fetch(:discriminator, nil)
      if !discriminator.nil?
        type_to_deserialize = value.fetch(discriminator)
        type_to_deserialize = T.get_union_types(field_type).find { |t| t.name.split('::').last == type_to_deserialize }              
        unmarshalled_val = Crystalline.unmarshal_json(value, type_to_deserialize)
        to_build.send(key, unmarshalled_val)
      else
        union_types = T.get_union_types(field_type)
        union_types = union_types.sort_by { |klass| Crystalline.non_nilable_attr_count(klass) }

        union_types.each do |union_type|
          begin
            unmarshalled_val = Crystalline.unmarshal_json(value, union_type)
            to_build.send(key, unmarshalled_val)
          rescue TypeError
            next
          rescue NoMethodError
            next
          rescue KeyError
            next
          end
          break
        end
      end
    elsif field_type.instance_of?(Class) && field_type.include?(::Crystalline::MetadataFields)
      unmarshalled = Crystalline.unmarshal_json(value, field_type)
      to_build.send(key, unmarshalled)
    else
      decoder = field.metadata.fetch(:format_json, {}).fetch(:decoder, nil)
      final_value = unmarshal_single(field_type, value, decoder)
      to_build.send(key, final_value)
    end
  end

  to_build
end

#from_json(json_obj) ⇒ Object 



61
62
63
64
65
66
67
68
 
# File 'lib/crystalline/metadata_fields.rb', line 61

def from_json(json_obj)
  begin
    d = JSON.parse(json_obj)
  rescue TypeError, JSON::ParserError
    d = json_obj
  end
  from_dict(d)
end

#unmarshal_single(field_type, value, decoder = nil) ⇒ Object 



40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
 
# File 'lib/crystalline/metadata_fields.rb', line 40

def unmarshal_single(field_type, value, decoder = nil)
  if field_type.instance_of?(Class) && field_type.include?(::Crystalline::MetadataFields)
    unmarshalled = field_type.from_dict(value)
    return unmarshalled
  elsif field_type.to_s == 'Object'
    # rubocop:disable Lint/SuppressedException
    begin
      value = JSON.parse(value)
    rescue TypeError, JSON::ParserError
    end
    # rubocop:enable Lint/SuppressedException
    return value
  end
  if decoder.nil?
    value
  else
    decoder.call(value)
  end
end