AwesomeXmlDsl

gem 'awesome_xml_dsl'

data_source = {
  basic_data_attribute: 'I have a value',
  nested_data: {
    just_a_value: 'Me too',
    a_conditional_existing_attribute: 'Count on me',
    local_reference: {
      local_data_attribute: 'I have a value (Now in local reference)',
      another_conditional_existing_attribute: 'Count on me (Even in local reference)'
    },
    a_collection: [
      {
        first_attribute: 'First Attribute 1',
        conditional_attribute: 'Conditional Attribute 1',
        has_nested: true
      },
      {
        first_attribute: 'First Attribute 2',
        conditional_attribute: 'Conditional Attribute 2',
        has_nested: false
      },
      {
        first_attribute: 'First Attribute 3',
        conditional_attribute: 'Conditional Attribute 3',
        has_nested: false
      }
    ]
  }
}

AwesomeXmlDsl::Generator.new(data_source: data_source, template: 'template.xml.rb').generate

# template.xml.rb

tag 'simple-tag' do
  a 'simple', 'attribute'
  a 'with_data', basic_data_attribute
  a 'a_reference_attribute', nested_data[:just_a_value]
  a 'a_conditional_existing_reference_attribute', if: :a_conditional_existing_attribute, of: nested_data
  a 'a_conditional_non_existing_reference_attribute', if: :dont_expect_to_see_me, of: nested_data

  tag 'nested-tag' do
    a 'simple', 'attribute'
    a 'with_data', basic_data_attribute
    a 'a_reference_attribute', nested_data[:just_a_value]
    a 'a_conditional_existing_reference_attribute', if: :a_conditional_existing_attribute, of: nested_data
    a 'a_conditional_non_existing_reference_attribute', if: :dont_expect_to_see_me, of: nested_data
  end

  tag 'nested-conditional-existing-tag', if: :local_reference, of: nested_data do
    a 'simple', 'attribute'
    a 'with_data', local_reference[:local_data_attribute]
    a 'a_conditional_existing_reference_attribute', if: :another_conditional_existing_attribute, of: local_reference
    a 'a_conditional_non_existing_reference_attribute', if: :dont_expect_to_see_me_here_too, of: local_reference
  end

  tag 'nested-conditional-existing-tag-but-other-name', if: :local_reference, of: nested_data, as: :other_name do
    a 'simple', 'attribute'
    a 'with_data', other_name[:local_data_attribute]
    a 'a_conditional_existing_reference_attribute', if: :another_conditional_existing_attribute, of: other_name
    a 'a_conditional_non_existing_reference_attribute', if: :dont_expect_to_see_me_here_too, of: other_name
  end

  tag 'nested-conditional-absent-tag', if: :why_are_you_still_expecting_me, of: nested_data do
    a 'i_wont_be_rendered', 'attribute'
  end

  tag 'repeating-tag', collection: nested_data[:a_collection], as: :element do
    a 'simple', 'attribute'
    a 'with_data', element[:first_attribute]
    a 'existing_conditional', if: :conditional_attribute, of: element
    a 'non_existing_conditional', if: :you_should_talk_to_somebody, of: element

    tag 'with-a-nested-tag', if: element[:has_nested] do
      a 'simple', 'attribute'
      a 'with_data', element[:first_attribute]
    end
  end

  partial 'with_local_value', locals: { a_local_value: 'I am a local value' }
  partial 'with_global_value'
  partial 'as_a_collection', collection: nested_data[:a_collection], as: :element
end

# Attributes

tag 'tag1' do
  a 'attr1', ''
  a 'attr2', if: :value, of: { value: 'value' }
  a 'attr3', if: :value, of: { no_value: 'value' }
end

# Tag with a name
tag 'tag1'

# Conditional tags (true)
tag 'tag1', if: true do
  a 'if_is_true', ''
end

tag 'tag2', if: 17 > 4 do
  a 'if_is_true', ''
end

tag 'tag3', if: :value, of: { value: 'string' } do
  a 'value_is', value
end

# Conditional tags (false)

tag 'tag1', if: false do
  a 'if_is_false', ''
end

tag 'tag2', if: 4 > 6 do
  a 'if_is_false_2', ''
end

tag 'tag3', if: :value, of: { not_value: 'string' } do
  a 'no_key_value', value
end

# Collection tags

tag 'tag1', collection: ['a', 'b', 'c'], as: :some_name do
  a 'collection_element', some_name
end

tag 'tag2', collection: ['a', 'b', 'c'], as: :some_name, if: true do
  a 'collection_element', some_name
end

tag 'tag3', collection: ['a', 'b', 'c'], as: :some_name, if: false do
  a 'collection_element', some_name
end

# Nested Tags

tag 'tag1', collection: ['a', 'b', 'c'], as: :some_name do
  tag 'tag2', locals: { value: 'some value' } do
    tag 'tag3' do
      a 'some_name', some_name
      a 'value', value
    end
  end
end