initial code with basic option/validation tests

git-svn-id: http://svn.techno-weenie.net/projects/plugins/attachment_fu@2551 567b1171-46fb-0310-a4c9-b4bef9110e78

lib/technoweenie/attachment_fu.rb

@@ -76,6 +76,11 @@ module Technoweenie # :nodoc:
         validate              :attachment_attributes_valid?
       end
 
+      # Returns true or false if the given content type is recognized as an image.
+      def image?(content_type)
+        content_types.include?(content_type)
+      end
+
       # Callback after an attachment has been saved either to the file system or the DB.
       # Only called if the file has been changed, not necessarily if the record is updated.
       #
@@ -91,6 +96,19 @@ module Technoweenie # :nodoc:
     end
 
     module InstanceMethods
+      # Checks whether the attachment's content type is an image content type
+      def image?
+        self.class.image?(content_type)
+      end
+      
+      def thumbnailable?
+        image? && respond_to?(:parent_id)
+      end
+
+      def thumbnail_class
+        self.class.thumbnail_class
+      end
+
       # Gets the thumbnail name for a filename.  'foo.jpg' becomes 'foo_thumbnail.jpg'
       def thumbnail_name_for(thumbnail = nil)
         return filename if thumbnail.blank?

test/fixtures/attachment.rb

@@ -32,53 +32,53 @@ class ImageOrPdfAttachment < Attachment
   has_attachment :content_type => ['pdf', :image], :resize_to => 'x50'
 end
 
-#class ImageWithThumbsAttachment < Attachment
-#  has_attachment :thumbnails => { :thumb => [50, 50], :geometry => 'x50' }, :resize_to => [55,55]
+class ImageWithThumbsAttachment < Attachment
+  has_attachment :thumbnails => { :thumb => [50, 50], :geometry => 'x50' }, :resize_to => [55,55]
   #after_resize do |record, img|
   #  record.aspect_ratio = img.columns.to_f / img.rows.to_f
   #end
-#end
+end
 
 class FileAttachment < ActiveRecord::Base
   has_attachment :file_system_path => 'vendor/plugins/attachment_fu/test/files'
   validates_as_attachment
 end
 
-#class ImageFileAttachment < FileAttachment
-#  has_attachment :file_system_path => 'vendor/plugins/attachment_fu/test/files', 
-#    :content_type => :image, :resize_to => [50,50]
-#end
-#
-#class ImageWithThumbsFileAttachment < FileAttachment
-#  has_attachment :file_system_path => 'vendor/plugins/attachment_fu/test/files',
-#    :thumbnails => { :thumb => [50, 50], :geometry => 'x50' }, :resize_to => [55,55]
+class ImageFileAttachment < FileAttachment
+  has_attachment :file_system_path => 'vendor/plugins/attachment_fu/test/files', 
+    :content_type => :image, :resize_to => [50,50]
+end
+
+class ImageWithThumbsFileAttachment < FileAttachment
+  has_attachment :file_system_path => 'vendor/plugins/attachment_fu/test/files',
+    :thumbnails => { :thumb => [50, 50], :geometry => 'x50' }, :resize_to => [55,55]
   #after_resize do |record, img|
   #  record.aspect_ratio = img.columns.to_f / img.rows.to_f
   #end
-#end
-#
-#class ImageWithThumbsClassFileAttachment < FileAttachment
-#  has_attachment :file_system_path => 'vendor/plugins/attachment_fu/test/files',
-#    :thumbnails => { :thumb => [50, 50] }, :resize_to => [55,55],
-#    :thumbnail_class => 'ImageThumbnail'
-#end
-#
-#class ImageThumbnail < FileAttachment
-#  has_attachment :file_system_path => 'vendor/plugins/attachment_fu/test/files/thumbnails'
-#end
-#
-## no parent
-#class OrphanAttachment < ActiveRecord::Base
-#  has_attachment
-#  validates_as_attachment
-#end
-#
-## no filename, no size, no content_type
-#class MinimalAttachment < ActiveRecord::Base
-#  has_attachment :file_system_path => 'vendor/plugins/attachment_fu/test/files'
-#  validates_as_attachment
-#  
-#  def filename
-#    "#{id}.file"
-#  end
-#end
+end
+
+class ImageWithThumbsClassFileAttachment < FileAttachment
+  has_attachment :file_system_path => 'vendor/plugins/attachment_fu/test/files',
+    :thumbnails => { :thumb => [50, 50] }, :resize_to => [55,55],
+    :thumbnail_class => 'ImageThumbnail'
+end
+
+class ImageThumbnail < FileAttachment
+  has_attachment :file_system_path => 'vendor/plugins/attachment_fu/test/files/thumbnails'
+end
+
+# no parent
+class OrphanAttachment < ActiveRecord::Base
+  has_attachment
+  validates_as_attachment
+end
+
+# no filename, no size, no content_type
+class MinimalAttachment < ActiveRecord::Base
+  has_attachment :file_system_path => 'vendor/plugins/attachment_fu/test/files'
+  validates_as_attachment
+  
+  def filename
+    "#{id}.file"
+  end
+end