Module: LHS::Problems::Nested::Base

Included in:
Errors, Warnings
Defined in:
lib/lhs/problems/nested/base.rb

Instance Method Summary collapse

Instance Method Details

#nest(messages, scope = nil) ⇒ Object

Filters base errors by scope and reduces key by given scope name; returns plain array if end of tree is reached


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# File 'lib/lhs/problems/nested/base.rb', line 9

def nest(messages, scope = nil)
  scope = translate_rails_to_api_scope(scope)
  return messages unless scope
  messages = messages.select do |key, _|
    key.match(/^#{scope}/)
  end
  # if only one key and this key has no dots, exit with plain
  if reached_leaf?(messages)
    messages.first[1]
  else
    remove_scope(messages, scope)
  end
end

#reached_leaf?(messages) ⇒ Boolean

Identifies if the end of nested errors tree is reached

Returns:

  • (Boolean)

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# File 'lib/lhs/problems/nested/base.rb', line 24

def reached_leaf?(messages)
  messages.keys.length == 1 &&
    !messages.first[0].match(/\./)
end

#remove_scope(messages, scope) ⇒ Object

Removes scope from given messages' key


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# File 'lib/lhs/problems/nested/base.rb', line 30

def remove_scope(messages, scope)
  messages.each_with_object({}) do |element, hash|
    key = element[0].to_s.gsub(/^#{scope}\./, '')
    hash[key.to_sym] = element[1]
  end
end

#translate_rails_to_api_scope(scope) ⇒ Object

Translates rails like accessors for collections like first, second, last to api error paths


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# File 'lib/lhs/problems/nested/base.rb', line 39

def translate_rails_to_api_scope(scope)
  case scope
  when :first
    0
  when :second
    1
  when :last
    return values.length - 1 if messages.present?
    0
  else
    scope
  end
end