instiki/app/models/page_set.rb

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# 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.revised_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.revised_at }).reverse
end
def pages_that_reference(page_name)
all_referring_pages = WikiReference.pages_that_reference(@web, page_name)
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self.select { |page| all_referring_pages.include?(page.name) }
end
def pages_that_link_to(page_name)
all_linking_pages = WikiReference.pages_that_link_to(@web, page_name)
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self.select { |page| all_linking_pages.include?(page.name) }
end
def pages_that_include(page_name)
all_including_pages = WikiReference.pages_that_include(@web, page_name)
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self.select { |page| all_including_pages.include?(page.name) }
end
def pages_authored_by(author)
all_pages_authored_by_the_author =
Page.connection.select_all(sanitize_sql([
"SELECT page_id FROM revision WHERE author = '?'", 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.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
def pages_in_category(category)
self.select { |page|
WikiReference.pages_in_category(web, category).map.include?(page.name)
}
end
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# 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
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}.flatten.uniq.sort
end
end