Class: VcShortcut::ChainManager

Inherits:
Object
  • Object
show all
Defined in:
lib/vc_shortcut/chain_manager.rb

Constant Summary collapse

TREE = 
{}

Instance Method Summary collapse

Constructor Details

#initialize(shortcut, process, find, view_context) ⇒ ChainManager

Returns a new instance of ChainManager.



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# File 'lib/vc_shortcut/chain_manager.rb', line 5

def initialize(shortcut, process, find, view_context)
  @tree = TREE[shortcut] ||= {}
  @process = process
  @find = find
  @context = ChainContext.new(view_context)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, **kwargs, &block) ⇒ Object 



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# File 'lib/vc_shortcut/chain_manager.rb', line 12

def method_missing(method, *args, **kwargs, &block)
  @context.chain << method

  # If we haven't seen this path before, let's attempt constantization
  if @tree[method].nil?
    result = @find.call(@context)

    if result == :has_more
      # We matched with a module
      @tree[method] = {}
    elsif result
      # We matched with a leaf
      @tree[method] = result
    else
      raise NameError, "Cannot find a component or module matching. Chain: #{@context.chain.join('.')}"
    end
  end

  leaf_or_subtree = @tree[method]
  # We are at a module. Continue chaining
  if leaf_or_subtree.is_a?(Hash)
    @tree = leaf_or_subtree
    return self
  end

  # Otherwise, we are at the leaf node (i.e a component)
  @context.component = leaf_or_subtree
  @context.call_args = args
  @context.call_kwargs = kwargs
  @context.call_block = block
  @process.call(@context)
end