Class: Etna::Injection

Inherits:
Object
  • Object
show all
Defined in:
lib/etna/injection.rb

Defined Under Namespace

Modules: FromHash

Class Method Summary collapse

Class Method Details

.inject_new(cls, hash, hash_has_string_keys, rest: nil, key_rest: nil, &missing_req_param_cb) ⇒ Object 



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# File 'lib/etna/injection.rb', line 12

def self.inject_new(cls, hash, hash_has_string_keys, rest: nil, key_rest: nil, &missing_req_param_cb)
  args, kwds = prep_args(
    cls.instance_method(:initialize), hash, hash_has_string_keys,
    rest: rest, key_rest: key_rest, &missing_req_param_cb
  )

  cls.new(*args, **kwds)
end

.prep_args(method, hash, hash_has_string_keys, rest: nil, key_rest: nil, &missing_req_param_cb) ⇒ Object 



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# File 'lib/etna/injection.rb', line 21

def self.prep_args(method, hash, hash_has_string_keys, rest: nil, key_rest: nil, &missing_req_param_cb)
  new_k_params = {}
  new_p_params = []

  method.parameters.each do |type, p_key|
    h_key = hash_has_string_keys ? p_key.to_s : p_key
    if type == :rest && rest
      new_p_params.append(*rest)
    elsif type == :keyrest && key_rest
      new_k_params.update(key_rest)
    elsif type == :req || type == :opt
      if hash.include?(h_key)
        new_p_params << hash[h_key]
      elsif type == :req
        if block_given?
          new_p_params << missing_req_param_cb.call(h_key)
        else
          new_p_params << nil
        end
      end
    elsif type == :keyreq || type == :key
      if hash.include?(h_key)
        new_k_params[p_key] = hash[h_key]
      elsif type == :keyreq
        if block_given?
          new_k_params[p_key] = missing_req_param_cb.call(h_key)
        else
          new_k_params[p_key] = nil
        end
      end
    end
  end

  [new_p_params, new_k_params]
end