69 lines
1.9 KiB
Ruby
69 lines
1.9 KiB
Ruby
# frozen_string_literal: true
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class WikiDirectory
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include ActiveModel::Validations
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attr_accessor :slug, :entries
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validates :slug, presence: true
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alias_method :to_param, :slug
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class << self
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# Groups a list of wiki pages into a nested collection of WikiPage and WikiDirectory objects,
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# preserving the order of the passed pages.
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#
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# Returns an array with all entries for the toplevel directory.
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#
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# @param [Array<WikiPage>] pages
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# @return [Array<WikiPage, WikiDirectory>]
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#
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def group_pages(pages)
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# Build a hash to map paths to created WikiDirectory objects,
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# and recursively create them for each level of the path.
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# For the toplevel directory we use '' as path, as that's what WikiPage#directory returns.
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directories = Hash.new do |_, path|
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directories[path] = new(path).tap do |directory|
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if path.present?
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parent = File.dirname(path)
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parent = '' if parent == '.'
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directories[parent].entries << directory
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directories[parent].entries.delete_if do |item|
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item.is_a?(WikiPage) && item.slug.casecmp?(directory.slug)
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end
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end
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end
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end
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pages.each do |page|
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next unless directory_for_page?(directories[page.directory], page)
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directories[page.directory].entries << page
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end
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directories[''].entries
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end
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private
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def directory_for_page?(directory, page)
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directory.entries.none? do |item|
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item.is_a?(WikiDirectory) && item.slug.casecmp?(page.slug)
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end
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end
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end
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def initialize(slug, entries = [])
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@slug = slug
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@entries = entries
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end
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def title
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WikiPage.unhyphenize(File.basename(slug))
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end
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# Relative path to the partial to be used when rendering collections
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# of this object.
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def to_partial_path
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'shared/wikis/wiki_directory'
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end
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end
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