123 lines
3.9 KiB
Ruby
123 lines
3.9 KiB
Ruby
require 'diff'
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class Revision < ActiveRecord::Base
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belongs_to :page
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composed_of :author, :mapping => [ %w(author name), %w(ip ip) ]
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def created_on
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created_at.to_date
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end
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def pretty_created_at
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# Must use DateTime because Time doesn't support %e on at least some platforms
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DateTime.new(
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created_at.year, created_at.mon, created_at.day, created_at.hour, created_at.min
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).strftime "%B %e, %Y %H:%M"
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end
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# todo: drop next_revision, previuous_revision and number from here - unused code
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def next_revision
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Revision.find_by_number_and_page_id(number+1, page_id)
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end
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def previous_revision
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@previous_revions ||= number > 0 ? Revision.find_by_number_and_page_id(number-1, page_id) : nil
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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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unless @wiki_words_cache
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wiki_chunks = display_content.find_chunks(WikiChunk::WikiLink)
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@wiki_words_cache = wiki_chunks.map { |c| ( c.escaped? ? nil : c.page_name ) }.compact.uniq
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end
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@wiki_words_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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# 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| 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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# Explicit check for new type of display cache with chunks_by_type method.
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# Ensures new version works with older snapshots.
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def display_content
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unless @display_cache && @display_cache.respond_to?(:chunks_by_type)
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@display_cache = WikiContent.new(self)
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@display_cache.render!
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end
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@display_cache
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end
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def display_diff
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previous_revision ? HTMLDiff.diff(previous_revision.display_content, display_content) : display_content
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end
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def clear_display_cache
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@wiki_words_cache = @published_cache = @display_cache = @wiki_includes_cache =
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@wiki_references_cache = nil
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end
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def display_published
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unless @published_cache && @published_cache.respond_to?(:chunks_by_type)
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@published_cache = WikiContent.new(self, {:mode => :publish})
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@published_cache.render!
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end
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@published_cache
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end
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def display_content_for_export
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WikiContent.new(self, {:mode => :export} ).render!
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end
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def force_rendering
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begin
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display_content.render!
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rescue => e
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logger.error "Failed rendering page #{@name}"
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logger.error e
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message = e.message
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# substitute content with an error message
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self.content = <<-EOL
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<p>Markup engine has failed to render this page, raising the following error:</p>
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<p>#{message}</p>
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<pre>#{self.content}</pre>
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EOL
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clear_display_cache
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raise e
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end
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end
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protected
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before_create :set_revision_number
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after_create :force_rendering
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after_save :clear_display_cache
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def set_revision_number
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self.number = self.class.count(['page_id = ?', page_id]) + 1
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end
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end
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