122 lines
3.6 KiB
Ruby
122 lines
3.6 KiB
Ruby
class Page < ActiveRecord::Base
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belongs_to :web
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has_many :revisions, :order => 'id'
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has_many :wiki_references, :order => 'referenced_name'
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has_one :current_revision, :class_name => 'Revision', :order => 'id DESC'
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def revise(content, time, author, renderer)
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revisions_size = new_record? ? 0 : revisions.size
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if (revisions_size > 0) and content == current_revision.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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author = Author.new(author.to_s) unless author.is_a?(Author)
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# Try to render content to make sure that markup engine can take it,
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renderer.revision = Revision.new(
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:page => self, :content => content, :author => author, :revised_at => time)
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renderer.display_content(update_references = true)
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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_size > 0) && continous_revision?(time, author)
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current_revision.update_attributes(:content => content, :revised_at => time)
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else
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revisions.build(:content => content, :author => author, :revised_at => time)
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end
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save
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self
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end
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def rollback(revision_number, time, author_ip, renderer)
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roll_back_revision = self.revisions[revision_number]
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if roll_back_revision.nil?
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raise Instiki::ValidationError.new("Revision #{revision_number} not found")
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end
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author = Author.new(roll_back_revision.author.name, author_ip)
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revise(roll_back_revision.content, time, author, renderer)
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end
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def revisions?
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revisions.size > 1
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end
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def previous_revision(revision)
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revision_index = revisions.each_with_index do |rev, index|
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if rev.id == revision.id
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break index
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else
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nil
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end
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end
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if revision_index.nil? or revision_index == 0
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nil
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else
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revisions[revision_index - 1]
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end
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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 wiki_words
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wiki_references.select { |ref| ref.wiki_word? }.map { |ref| ref.referenced_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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LOCKING_PERIOD = 30.minutes
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def lock(time, locked_by)
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update_attributes(:locked_at => time, :locked_by => locked_by)
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end
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def lock_duration(time)
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((time - locked_at) / 60).to_i unless locked_at.nil?
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end
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def unlock
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update_attribute(:locked_at, nil)
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end
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def locked?(comparison_time)
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locked_at + LOCKING_PERIOD > comparison_time unless locked_at.nil?
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end
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def to_param
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name
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end
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private
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def continous_revision?(time, author)
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(current_revision.author == author) && (revised_at + 30.minutes > time)
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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_id, *args, &block)
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method_name = method_id.to_s
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# Perform a hand-off to AR::Base#method_missing
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if @attributes.include?(method_name) or md = /(=|\?|_before_type_cast)$/.match(method_name)
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super(method_id, *args, &block)
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else
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current_revision.send(method_id)
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end
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end
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end
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