instiki/lib/page_set.rb
2005-08-09 02:20:28 +00:00

90 lines
2.3 KiB
Ruby

# Container for a set of pages with methods for manipulation.
class PageSet < Array
attr_reader :web
def initialize(web, pages = nil, condition = nil)
@web = web
# if pages is not specified, make a list of all pages in the web
if pages.nil?
super(web.pages)
# otherwise use specified pages and condition to produce a set of pages
elsif condition.nil?
super(pages)
else
super(pages.select { |page| condition[page] })
end
end
def most_recent_revision
self.map { |page| page.created_at }.max || Time.at(0)
end
def by_name
PageSet.new(@web, sort_by { |page| page.name })
end
alias :sort :by_name
def by_revision
PageSet.new(@web, sort_by { |page| page.created_at }).reverse
end
def pages_that_reference(page_name)
self.select { |page| page.wiki_references.include?(page_name) }
end
def pages_that_link_to(page_name)
self.select { |page| page.wiki_words.include?(page_name) }
end
def pages_that_include(page_name)
self.select { |page| page.wiki_includes.include?(page_name) }
end
def pages_authored_by(author)
self.select { |page| page.authors.include?(author) }
end
def characters
self.inject(0) { |chars,page| chars += page.content.size }
end
# Returns all the orphaned pages in this page set. That is,
# pages in this set for which there is no reference in the web.
# The HomePage and author pages are always assumed to have
# references and so cannot be orphans
# Pages that refer to themselves and have no links from outside are oprphans.
def orphaned_pages
never_orphans = web.select.authors + ['HomePage']
self.select { |page|
if never_orphans.include? page.name
false
else
references = pages_that_reference(page.name)
references.empty? or references == [page]
end
}
end
# Returns all the wiki words in this page set for which
# there are no pages in this page set's web
def wanted_pages
wiki_words - web.select.names
end
def names
self.map { |page| page.name }
end
def wiki_words
self.inject([]) { |wiki_words, page| wiki_words << page.wiki_words }.flatten.uniq
end
def authors
self.inject([]) { |authors, page| authors << page.authors }.flatten.uniq.sort
end
end