engine/app/uploaders/theme_asset_uploader.rb

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# encoding: utf-8
class ThemeAssetUploader < AssetUploader
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process :set_content_type
process :set_size
process :set_width_and_height
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version :thumb do
process :resize_to_fill => [50, 50]
process :convert => 'png'
end
version :medium do
process :resize_to_fill => [80, 80]
process :convert => 'png'
end
version :preview do
process :resize_to_fit => [880, 1100]
process :convert => 'png'
end
def store_dir
"sites/#{model.site_id}/themes/#{model.id}"
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end
def extension_white_list
%w(jpg jpeg gif png css js)
end
def filename
if model.slug.present?
model.filename
else
extension = File.extname(original_filename)
basename = File.basename(original_filename, extension).slugify(:underscore => true)
"#{basename}#{extension}"
end
end
end