Rename acts_as_file to has_one_file and clean up some code.

app/models/attachment.rb

@@ -16,7 +16,7 @@ class Attachment < ActiveRecord::Base
   belongs_to :page
   belongs_to :site
   scope_by_site_id
-  acts_as_file DB_ATTACHMENTS_PATH
+  has_one_file :path => DB_ATTACHMENTS_PATH
 
   def visible_to?(person)
     (message and person.can_see?(message)) or page

app/models/publication.rb

@@ -16,7 +16,7 @@ class Publication < ActiveRecord::Base
 
   scope_by_site_id
 
-  acts_as_file DB_PUBLICATIONS_PATH
+  has_one_file :path => DB_PUBLICATIONS_PATH
   acts_as_logger LogItem
 
   validates_presence_of :name

vendor/plugins/has_one_file/init.rb

@@ -0,0 +1 @@
+require 'has_one_file'

vendor/plugins/has_one_file/lib/has_one_file.rb

@@ -0,0 +1,93 @@
+require 'active_record'
+
+module Seven1m
+  module HasOneFile
+
+    def self.included(mod)
+      mod.extend(ClassMethods)
+    end
+
+    module ClassMethods
+      def has_one_file(options)
+        options.symbolize_keys!
+        file_env = RAILS_ENV == 'production' ? '' : ('.' + RAILS_ENV)
+        class_eval <<-END
+          CONTENT_TYPES = {
+            'gif' => "image/gif",
+            'jpg' => "image/jpeg",
+            'png' => "image/png",
+            'swf' => "application/x-shockwave-flash",
+            'pdf' => "application/pdf",
+            'doc' => "application/msword",
+            'zip' => "application/zip",
+            'mp3' => "audio/mpeg",
+            'wma' => "audio/x-ms-wma",
+            'wav' => "audio/x-wav",
+            'css' => "text/css",
+            'html' => "text/html",
+            'js' => "text/javascript",
+            'txt' => "text/plain",
+            'xml' => "text/xml",
+            'mpeg' => "video/mpeg",
+            'mpg' => "video/mpeg",
+            'mov' => "video/quicktime",
+            'avi' => "video/x-msvideo",
+            'asf' => "video/x-ms-asf",
+            'wmv' => "video/x-ms-wmv"
+          }
+        
+          def has_file?
+            !file_path.nil?
+          end
+          
+          def file_name
+            return nil unless id
+            matches = Dir[File.join('#{options[:path]}', id.to_s + '#{file_env}.*')].select { |p| p.index('#{file_env}') }.map { |p| File.split(p).last }
+            matches.any? ? matches.first : nil
+          end
+          
+          def file_path
+            file_name ? File.join('#{options[:path]}', file_name) : nil
+          end
+          
+          def base_file_path
+            return nil unless id
+            File.join('#{options[:path]}', id.to_s + '#{file_env}')
+          end
+          
+          def file_content_type
+            file_name ? CONTENT_TYPES[file_name.split('.').last] : nil
+          end
+          
+          def file_size
+            @file_size ||= File::Stat.new(file_path).size
+          end
+          
+          def file=(file)
+            raise 'Cannot save file before saving record.' unless id
+            File.delete file_path if file_path
+            if file
+              filename = file.original_filename
+              file = file.read
+              output_path = File.join('#{options[:path]}', id.to_s + '#{file_env}.' + filename.split('.').last.downcase)
+              File.open(output_path, 'w') do |f|
+                f.write(file)
+              end
+            end
+          end
+          
+          def destroy_with_file_deletion
+            self.file = nil
+            destroy_without_file_deletion
+          end
+          alias_method_chain :destroy, :file_deletion
+        END
+      end
+    end
+
+  end
+end
+
+ActiveRecord::Base.class_eval do
+  include Seven1m::HasOneFile
+end