134 lines
4.3 KiB
Ruby
134 lines
4.3 KiB
Ruby
require 'diff'
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# Temporary class containing all rendering stuff from a Revision
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# I want to shift all rendering loguc to the controller eventually
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class PageRenderer
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include HTMLDiff
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def self.setup_url_generator(url_generator)
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@@url_generator = url_generator
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end
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def self.teardown_url_generator
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@@url_generator = nil
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end
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attr_reader :revision
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def initialize(revision = nil)
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self.revision = revision
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end
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def revision=(r)
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@revision = r
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@display_content = @display_published = @wiki_words_cache = @wiki_includes_cache =
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@wiki_references_cache = nil
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end
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def display_content(update_references = false)
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@display_content ||= render(:update_references => update_references)
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end
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def display_content_for_export
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render :mode => :export
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end
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def display_published
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@display_published ||= render(:mode => :publish)
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end
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def display_diff
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previous_revision = @revision.page.previous_revision(@revision)
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if previous_revision
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rendered_previous_revision = WikiContent.new(previous_revision, @@url_generator).render!
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diff(rendered_previous_revision, display_content)
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else
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display_content
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end
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end
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# Returns an array of all the WikiIncludes present in the content of this revision.
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def wiki_includes
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unless @wiki_includes_cache
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chunks = display_content.find_chunks(Include)
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@wiki_includes_cache = chunks.map { |c| ( c.escaped? ? nil : c.page_name ) }.compact.uniq
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end
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@wiki_includes_cache
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end
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# Returns an array of all the WikiReferences present in the content of this revision.
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def wiki_references
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unless @wiki_references_cache
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chunks = display_content.find_chunks(WikiChunk::WikiReference)
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@wiki_references_cache = chunks.map { |c| ( c.escaped? ? nil : c.page_name ) }.compact.uniq
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end
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@wiki_references_cache
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end
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# Returns an array of all the WikiWords present in the content of this revision.
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def wiki_words
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@wiki_words_cache ||= find_wiki_words(display_content)
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end
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def find_wiki_words(rendering_result)
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wiki_links = rendering_result.find_chunks(WikiChunk::WikiLink)
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# Exclude backslash-escaped wiki words, such as \WikiWord, as well as links to files
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# and pictures, such as [[foo.txt:file]] or [[foo.jpg:pic]]
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wiki_links.delete_if { |link| link.escaped? or [:pic, :file].include?(link.link_type) }
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# convert to the list of unique page names
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wiki_links.map { |link| ( link.page_name ) }.uniq
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end
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# Returns an array of all the WikiWords present in the content of this revision.
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# that already exists as a page in the web.
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def existing_pages
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wiki_words.select { |wiki_word| @revision.page.web.page(wiki_word) }
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end
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# Returns an array of all the WikiWords present in the content of this revision
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# that *doesn't* already exists as a page in the web.
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def unexisting_pages
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wiki_words - existing_pages
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end
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private
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def render(options = {})
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rendering_result = WikiContent.new(@revision, @@url_generator, options).render!
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update_references(rendering_result) if options[:update_references]
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rendering_result
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end
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def update_references(rendering_result)
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WikiReference.delete_all ['page_id = ?', @revision.page_id]
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references = @revision.page.wiki_references
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wiki_words = find_wiki_words(rendering_result)
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# TODO it may be desirable to save links to files and pictures as WikiReference objects
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# present version doesn't do it
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wiki_words.each do |referenced_name|
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# Links to self are always considered linked
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if referenced_name == @revision.page.name
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link_type = WikiReference::LINKED_PAGE
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else
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link_type = WikiReference.link_type(@revision.page.web, referenced_name)
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end
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references.build :referenced_name => referenced_name, :link_type => link_type
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end
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include_chunks = rendering_result.find_chunks(Include)
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includes = include_chunks.map { |c| ( c.escaped? ? nil : c.page_name ) }.compact.uniq
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includes.each do |included_page_name|
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references.build :referenced_name => included_page_name,
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:link_type => WikiReference::INCLUDED_PAGE
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end
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categories = rendering_result.find_chunks(Category).map { |cat| cat.list }.flatten
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categories.each do |category|
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references.build :referenced_name => category, :link_type => WikiReference::CATEGORY
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end
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end
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end
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