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Contents
module Locomotive
class PageTreeService < Struct.new(:site)
# Returns the tree of pages from the site with the most minimal amount of queries.
# This method should only be used for read-only purpose since
# the mongodb returns the minimal set of required attributes to build
# the tree.
#
# @return [ Array ] The first array of pages (index + page not found + pages with depth == 1)
#
def build_tree
pages, page_not_found = pages_with_minimun_attributes, nil
[].tap do |tree|
while page = pages.shift
if page.not_found?
# move the "page not found" (404) at the end of the array
page_not_found = page
elsif page.index?
# make the index page without children
tree << [page, nil]
elsif !page.is_layout_or_related?
tree << _build_tree(page, pages)
end
end
tree << [page_not_found, nil]
end
end
protected
#:nodoc:
def pages_with_minimun_attributes
site.pages.unscoped.
minimal_attributes.
order_by_depth_and_position.
to_a
end
#:nodoc:
def _build_tree(current_page, pages)
i, children = 0, []
while !pages.empty?
page = pages[i]
break if page.nil? # end of the array
if page.parent_id == current_page.id
page = pages.delete_at(i)
children << _build_tree(page, pages)
else
i += 1
end
end
[current_page, children]
end
end
end
Version data entries
41 entries across 41 versions & 1 rubygems