112 lines
3 KiB
Ruby
112 lines
3 KiB
Ruby
require 'date'
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require 'page_lock'
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require 'revision'
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require 'wiki_words'
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require 'chunks/wiki'
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class Page
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include PageLock
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attr_reader :name, :web
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attr_accessor :revisions
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def initialize(web, name, content, created_at, author)
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@web, @name, @revisions = web, name, []
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revise(content, created_at, author)
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end
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def revise(content, created_at, author)
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if not @revisions.empty? and content == @revisions.last.content
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raise Instiki::ValidationError.new(
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"You have tried to save page '#{name}' without changing its content")
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end
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# A user may change a page, look at it and make some more changes - several times.
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# Not to record every such iteration as a new revision, if the previous revision was done
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# by the same author, not more than 30 minutes ago, then update the last revision instead of
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# creating a new one
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if !@revisions.empty? && continous_revision?(created_at, author)
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@revisions.last.created_at = created_at
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@revisions.last.content = content
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@revisions.last.clear_display_cache
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else
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@revisions << Revision.new(self, @revisions.length, content, created_at, author)
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end
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self.revisions.last.force_rendering
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# at this point the page may not be inserted in the web yet, and therefore
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# references to the page itself are rendered as "unresolved". Clearing the cache allows
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# the page to re-render itself once again, hopefully _after_ it is inserted in the web
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self.revisions.last.clear_display_cache
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@web.refresh_pages_with_references(@name) if @revisions.length == 1
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end
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def rollback(revision_number, created_at, author_ip = nil)
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roll_back_revision = @revisions[revision_number].dup
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revise(roll_back_revision.content, created_at, Author.new(roll_back_revision.author, author_ip))
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end
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def revisions?
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revisions.length > 1
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end
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def revised_on
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created_on
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end
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def in_category?(cat)
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cat.nil? || cat.empty? || categories.include?(cat)
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end
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def categories
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display_content.find_chunks(Category).map { |cat| cat.list }.flatten
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end
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def authors
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revisions.collect { |rev| rev.author }
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end
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def references
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@web.select.pages_that_reference(name)
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end
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def linked_from
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@web.select.pages_that_link_to(name)
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end
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def included_from
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@web.select.pages_that_include(name)
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end
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# Returns the original wiki-word name as separate words, so "MyPage" becomes "My Page".
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def plain_name
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@web.brackets_only ? name : WikiWords.separate(name)
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end
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# used to build chunk ids.
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def id
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@id ||= name.unpack('H*').first
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end
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def link(options = {})
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@web.make_link(name, nil, options)
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end
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def author_link(options = {})
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@web.make_link(author, nil, options)
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end
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private
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def continous_revision?(created_at, author)
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@revisions.last.author == author && @revisions.last.created_at + 30.minutes > created_at
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end
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# Forward method calls to the current revision, so the page responds to all revision calls
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def method_missing(method_symbol)
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revisions.last.send(method_symbol)
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end
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end
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