Checkout of Instiki Trunk 1/21/2007.

app/models/wiki_file.rb

@@ -0,0 +1,64 @@
+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