68 lines
2.3 KiB
Ruby
68 lines
2.3 KiB
Ruby
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module CouchRest
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module Mixins
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module ExtendedAttachments
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# creates a file attachment to the current doc
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def create_attachment(args={})
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raise ArgumentError unless args[:file] && args[:name]
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return if has_attachment?(args[:name])
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self['_attachments'] ||= {}
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set_attachment_attr(args)
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rescue ArgumentError => e
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raise ArgumentError, 'You must specify :file and :name'
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end
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# reads the data from an attachment
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def read_attachment(attachment_name)
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Base64.decode64(database.fetch_attachment(self.id, attachment_name))
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end
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# modifies a file attachment on the current doc
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def update_attachment(args={})
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raise ArgumentError unless args[:file] && args[:name]
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return unless has_attachment?(args[:name])
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delete_attachment(args[:name])
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set_attachment_attr(args)
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rescue ArgumentError => e
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raise ArgumentError, 'You must specify :file and :name'
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end
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# deletes a file attachment from the current doc
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def delete_attachment(attachment_name)
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return unless self['_attachments']
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self['_attachments'].delete attachment_name
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end
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# returns true if attachment_name exists
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def has_attachment?(attachment_name)
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!!(self['_attachments'] && self['_attachments'][attachment_name] && !self['_attachments'][attachment_name].empty?)
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end
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# returns URL to fetch the attachment from
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def attachment_url(attachment_name)
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return unless has_attachment?(attachment_name)
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"#{database.root}/#{self.id}/#{attachment_name}"
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end
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private
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def encode_attachment(data)
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::Base64.encode64(data).gsub(/\r|\n/,'')
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end
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def get_mime_type(file)
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::MIME::Types.type_for(file.path).empty? ?
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'text\/plain' : MIME::Types.type_for(file.path).first.content_type.gsub(/\//,'\/')
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end
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def set_attachment_attr(args)
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content_type = args[:content_type] ? args[:content_type] : get_mime_type(args[:file])
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self['_attachments'][args[:name]] = {
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'content-type' => content_type,
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'data' => encode_attachment(args[:file].read)
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}
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end
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end # module ExtendedAttachments
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end
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end
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