Class: Curlybars::Node::Path

Inherits:
Struct
  • Object
show all
Defined in:
lib/curlybars/node/path.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#path ⇒ Object

Returns the value of attribute path

Returns:

  • (Object) —

    the current value of path



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# File 'lib/curlybars/node/path.rb', line 3

def path
  @path
end

#position ⇒ Object

Returns the value of attribute position

Returns:

  • (Object) —

    the current value of position



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# File 'lib/curlybars/node/path.rb', line 3

def position
  @position
end

Instance Method Details

#cache_key ⇒ Object 



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# File 'lib/curlybars/node/path.rb', line 128

def cache_key
  [
    path,
    self.class.name
  ].join("/")
end

#collection_value?(value) ⇒ Boolean

Returns:



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# File 'lib/curlybars/node/path.rb', line 42

def collection_value?(value)
  value.is_a?(Array) && value.first.is_a?(Hash)
end

#collectionlike?(branches) ⇒ Boolean

Returns:



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# File 'lib/curlybars/node/path.rb', line 77

def collectionlike?(branches)
  presenter_collection?(branches) || generic_collection_helper?(branches)
end

#compile ⇒ Object 



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# File 'lib/curlybars/node/path.rb', line 4

def compile
  # NOTE: the following is a heredoc string, representing the ruby code fragment
  # outputted by this node.
  <<-RUBY
  rendering.path(
      #{path.inspect},
      rendering.position(#{position.line_number}, #{position.line_offset})
    )
  RUBY
end

#generic_collection_helper?(branches) ⇒ Boolean

Returns:



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# File 'lib/curlybars/node/path.rb', line 70

def generic_collection_helper?(branches)
  value = resolve(branches)
  value.is_a?(Array) &&
    value.first == :helper &&
    collection_value?(value.last)
end

#generic_helper?(branches) ⇒ Boolean

Returns:



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# File 'lib/curlybars/node/path.rb', line 63

def generic_helper?(branches)
  value = resolve(branches)
  value.is_a?(Array) &&
    value.first == :helper &&
    presenter_value?(value.last)
end

#helper?(branches) ⇒ Boolean

Returns:



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# File 'lib/curlybars/node/path.rb', line 59

def helper?(branches)
  resolve(branches) == :helper
end

#leaf?(branches) ⇒ Boolean

Returns:



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# File 'lib/curlybars/node/path.rb', line 50

def leaf?(branches)
  value = resolve(branches)
  value.nil?
end

#partial?(branches) ⇒ Boolean

Returns:



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# File 'lib/curlybars/node/path.rb', line 55

def partial?(branches)
  resolve(branches) == :partial
end

#presenter?(branches) ⇒ Boolean

Returns:



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# File 'lib/curlybars/node/path.rb', line 34

def presenter?(branches)
  resolve(branches).is_a?(Hash)
end

#presenter_collection?(branches) ⇒ Boolean

Returns:



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# File 'lib/curlybars/node/path.rb', line 46

def presenter_collection?(branches)
  collection_value?(resolve(branches))
end

#presenter_value?(value) ⇒ Boolean

Returns:



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# File 'lib/curlybars/node/path.rb', line 38

def presenter_value?(value)
  value.is_a?(Hash)
end

#presenterlike?(branches) ⇒ Boolean

Returns:



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# File 'lib/curlybars/node/path.rb', line 81

def presenterlike?(branches)
  presenter?(branches) || generic_helper?(branches)
end

#resolve(branches) ⇒ Object 



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# File 'lib/curlybars/node/path.rb', line 89

def resolve(branches)
  @value ||= begin
    if Curlybars.global_helpers_dependency_tree.key?(path.to_sym)
      dep_node = Curlybars.global_helpers_dependency_tree[path.to_sym]

      return :helper if dep_node.nil?

      return [:helper, dep_node]
    end

    path_split_by_slashes = path.split('/')
    backward_steps_on_branches = path_split_by_slashes.count - 1
    base_tree_position = branches.length - backward_steps_on_branches
    base_tree_index = base_tree_position - 1

    raise Curlybars::Error::Validate.new('unallowed_path', "'#{path}' goes out of scope", position) if base_tree_index < 0

    base_tree = branches[base_tree_index]

    dotted_path_side = path_split_by_slashes.last

    offset_adjustment = 0
    dotted_path_side.split(/\./).map(&:to_sym).inject(base_tree) do |sub_tree, step|
      if step == :this
        next sub_tree
      elsif step == :length && (sub_tree.is_a?(Array) && sub_tree.first.is_a?(Hash))
        next nil # :length is synthesised leaf
      elsif !(sub_tree.is_a?(Hash) && sub_tree.key?(step))
        message = step.to_s == path ? "'#{path}' does not exist" : "not possible to access `#{step}` in `#{path}`"
        raise Curlybars::Error::Validate.new('unallowed_path', message, position, offset_adjustment, path: path, step: step)
      end

      sub_tree[step]
    ensure
      offset_adjustment += step.length + 1 # '1' is the length of the dot
    end
  end
end

#resolve_and_check!(branches, check_type: :anything) ⇒ Object 



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# File 'lib/curlybars/node/path.rb', line 26

def resolve_and_check!(branches, check_type: :anything)
  value = resolve(branches)

  check_type_of(branches, check_type)

  value
end

#subexpression? ⇒ Boolean

Returns:



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# File 'lib/curlybars/node/path.rb', line 85

def subexpression?
  false
end

#validate(branches, check_type: :anything) ⇒ Object 



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# File 'lib/curlybars/node/path.rb', line 19

def validate(branches, check_type: :anything)
  resolve_and_check!(branches, check_type: check_type)
  []
rescue Curlybars::Error::Validate => path_error
  path_error
end

#validate_as_value(branches) ⇒ Object 



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# File 'lib/curlybars/node/path.rb', line 15

def validate_as_value(branches)
  validate(branches, check_type: :leaf)
end