instiki/app/models/wiki_file.rb

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class WikiFile < ActiveRecord::Base
belongs_to :web
before_save :write_content_to_file
before_destroy :delete_content_file
validates_presence_of %w( web file_name )
validates_length_of :file_name, :within=>1..50
validates_length_of :description, :maximum=>255
def self.find_by_file_name(file_name)
find(:first, :conditions => ['file_name = ?', file_name])
end
SANE_FILE_NAME = /^[a-zA-Z0-9\-_\. ]*$/
def validate
if file_name
if file_name !~ SANE_FILE_NAME
errors.add("file_name", "is invalid. Only latin characters, digits, dots, underscores, " +
"dashes and spaces are accepted")
elsif file_name == '.' or file_name == '..'
errors.add("file_name", "cannot be '.' or '..'")
end
end
if @web and @content
if (@content.size > @web.max_upload_size.kilobytes)
errors.add("content", "size (#{(@content.size / 1024.0).round} kilobytes) exceeds " +
"the maximum (#{web.max_upload_size} kilobytes) set for this wiki")
end
end
errors.add("content", "is empty") if @content.nil? or @content.empty?
end
def content=(content)
if content.respond_to? :read
@content = content.read
else
@content = content
end
end
def content
@content ||= ( File.open(content_path, 'rb') { |f| f.read } )
end
def content_path
web.files_path + '/' + file_name
end
def write_content_to_file
web.create_files_directory unless File.exists?(web.files_path)
File.open(self.content_path, 'wb') { |f| f.write(@content) }
end
def delete_content_file
require 'fileutils'
FileUtils.rm_f(content_path) if File.exists?(content_path)
end
end