Initial import

app/models/wiki_page.rb

@@ -0,0 +1,59 @@
+# Engenharia de Software 2007.1
+# Copyright (C) 2007, Adriano, Alinson, Andre, Rafael e Bustamante
+# 
+# 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.
+
+require 'acts_as_versioned'
+require 'tempfile'
+
+class WikiPage < ActiveRecord::Base
+
+	belongs_to :course
+	belongs_to :user
+
+	generate_validations
+	validates_uniqueness_of :title, :scope => :course_id
+	validates_format_of :title, :with => /^[^0-9]/
+
+	acts_as_paranoid
+	acts_as_list :scope => 'course_id = #{course_id}'
+	acts_as_versioned :if_changed => [ :content, :description, :title ]
+	self.non_versioned_fields << 'position'
+
+	def to_html(text = self.content)
+		return BlueCloth.new(text).to_html
+	end
+
+	def to_param
+		self.title
+	end
+
+	def WikiPage.diff(from, to)
+		# Cria um arquivo com o conteudo da versao antiga
+		original_content_file = Tempfile.new("old")
+		original_content_file << from.content << "\n"
+		original_content_file.flush
+
+		# Cria um arquivo com o conteudo da versao nova
+		new_content_file = Tempfile.new("new")
+		new_content_file << to.content << "\n"
+		new_content_file.flush
+		
+		# Calcula as diferencas
+		diff = `diff -u #{original_content_file.path()} #{new_content_file.path()}`
+
+		# Fecha os arquivos temporarios
+		new_content_file.close!
+		original_content_file.close!
+
+		return diff
+	end
+end