Module: ScrapCbf::DepthSearch

Included in:
MatchesHelper
Defined in:
lib/scrap_cbf/helpers/lib/depth_search.rb

Overview

This module use recursion and regex to find specifics methods on the dom. A better use case for this method is searching on a component view that has small text wrapped only on a html tag without a specific class

Instance Method Summary collapse

Instance Method Details

#depth_search(element, proc) ⇒ Object?

Search element’s children recursively and returns first assertion matched.

The assertion must be passed through a proc, and must return nil for false assertions and the element searched for true assetions.

Parameters:

  • element (Nokogiri::XML::Element) —

    to be searched.

  • proc (Proc) —

    with logic to test assertion.

Returns:

  • (Object, nil) —

    object may be text element or a dom element.



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# File 'lib/scrap_cbf/helpers/lib/depth_search.rb', line 16

def depth_search(element, proc)
  res = nil
  counter = 0
  number_of_children = element.children.length

  while counter < number_of_children

    child = element.children[counter]
    res = proc.call(child)

    return res if res # recursion base case #1 - return when found

    res = depth_search(child, proc)

    return res if res # recursion base case #2 - return from recursion

    counter += 1
  end
  res
end