Redmine 4.1.1

app/models/wiki_content_version.rb

@@ -0,0 +1,119 @@
+# frozen_string_literal: true
+
+# Redmine - project management software
+# Copyright (C) 2006-2019  Jean-Philippe Lang
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+require 'zlib'
+
+class WikiContentVersion < ActiveRecord::Base
+  belongs_to :page, :class_name => 'WikiPage'
+  belongs_to :author, :class_name => 'User'
+
+  acts_as_event :title => Proc.new {|o| "#{l(:label_wiki_edit)}: #{o.page.title} (##{o.version})"},
+                :description => :comments,
+                :datetime => :updated_on,
+                :type => 'wiki-page',
+                :group => :page,
+                :url => Proc.new {|o| {:controller => 'wiki', :action => 'show', :project_id => o.page.wiki.project, :id => o.page.title, :version => o.version}}
+
+  acts_as_activity_provider :type => 'wiki_edits',
+                            :timestamp => "#{table_name}.updated_on",
+                            :author_key => "#{table_name}.author_id",
+                            :permission => :view_wiki_edits,
+                            :scope => select("#{table_name}.updated_on, #{table_name}.comments, " +
+                                             "#{table_name}.version, #{WikiPage.table_name}.title, " +
+                                             "#{table_name}.page_id, #{table_name}.author_id, " +
+                                             "#{table_name}.id").
+                                      joins("LEFT JOIN #{WikiPage.table_name} ON #{WikiPage.table_name}.id = #{table_name}.page_id " +
+                                            "LEFT JOIN #{Wiki.table_name} ON #{Wiki.table_name}.id = #{WikiPage.table_name}.wiki_id " +
+                                            "LEFT JOIN #{Project.table_name} ON #{Project.table_name}.id = #{Wiki.table_name}.project_id")
+
+  after_destroy :page_update_after_destroy
+
+  def text=(plain)
+    case Setting.wiki_compression
+    when 'gzip'
+    begin
+      self.data = Zlib::Deflate.deflate(plain, Zlib::BEST_COMPRESSION)
+      self.compression = 'gzip'
+    rescue
+      self.data = plain
+      self.compression = ''
+    end
+    else
+      self.data = plain
+      self.compression = ''
+    end
+    plain
+  end
+
+  def text
+    @text ||= begin
+      str = case compression
+            when 'gzip'
+              Zlib::Inflate.inflate(data)
+            else
+              # uncompressed data
+              data
+            end
+      str.force_encoding("UTF-8")
+      str
+    end
+  end
+
+  def project
+    page.project
+  end
+
+  def attachments
+    page.nil? ? [] : page.attachments
+  end
+
+  # Return true if the content is the current page content
+  def current_version?
+    page.content.version == self.version
+  end
+
+  # Returns the previous version or nil
+  def previous
+    @previous ||= WikiContentVersion.
+      reorder(version: :desc).
+      includes(:author).
+      where("wiki_content_id = ? AND version < ?", wiki_content_id, version).first
+  end
+
+  # Returns the next version or nil
+  def next
+    @next ||= WikiContentVersion.
+      reorder(version: :asc).
+      includes(:author).
+      where("wiki_content_id = ? AND version > ?", wiki_content_id, version).first
+  end
+
+  private
+
+  # Updates page's content if the latest version is removed
+  # or destroys the page if it was the only version
+  def page_update_after_destroy
+    latest = page.content.versions.reorder(version: :desc).first
+    if latest && page.content.version != latest.version
+      raise ActiveRecord::Rollback unless page.content.revert_to!(latest)
+    elsif latest.nil?
+      raise ActiveRecord::Rollback unless page.destroy
+    end
+  end
+end