Initial import

app/models/attachment.rb

@@ -0,0 +1,66 @@
+# 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 'fileutils.rb'
+
+class Attachment < ActiveRecord::Base
+
+	belongs_to :course
+	generate_validations
+	acts_as_paranoid
+
+	# Atributo virtual file
+	def file=(new_file)
+		@tmp_file = new_file
+		self.size = new_file.size
+	end
+
+	# Limpa o nome do arquivo
+	protected
+	def sanitize(filename)
+		filename = File.basename(filename)
+		filename.gsub(/[^\w\.\-]/, '_')
+	end
+
+	# Verifica se o arquivo é válido
+	def validate
+		if @tmp_file
+			errors.add("file") if @tmp_file.size == 0
+			errors.add("file", "is too large"[]) if @tmp_file.size > App.max_upload_file_size
+		else
+			# Caso o objeto possua id, significa que ele já está no banco de dados.
+			# Um arquivo em branco, entao, não é inválido: significa que a pessoa só quer
+			# modificar a descrição, ou algo assim..
+			errors.add("file", "is needed"[]) if not self.id
+		end
+	end
+
+	# Salva o arquivo fisicamente no HD
+	def after_save
+		@file_path = "#{RAILS_ROOT}/public/upload/#{course.id}/#{self.id}"
+		FileUtils.mkdir_p(File.dirname(@file_path))
+
+		if @tmp_file
+			logger.debug("Saving #{self.id}")
+			File.open(@file_path, "wb") do |f|
+				f.write(@tmp_file.read)
+			end
+		end
+	end
+
+	# Deleta o arquivo
+	#def after_destroy
+	#	@file_path = "#{RAILS_ROOT}/public/upload/#{course.id}/#{self.id}"
+	#	File.delete(@file_path) if File.exists?(@file_path)
+	#end
+end