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require 'action_mailer/adv_attr_accessor'
require 'action_mailer/part_container'
require 'action_mailer/utils'
module ActionMailer
# Represents a subpart of an email message. It shares many similar
# attributes of ActionMailer::Base. Although you can create parts manually
# and add them to the #parts list of the mailer, it is easier
# to use the helper methods in ActionMailer::PartContainer.
class Part
include ActionMailer::AdvAttrAccessor
include ActionMailer::PartContainer
# Represents the body of the part, as a string. This should not be a
# Hash (like ActionMailer::Base), but if you want a template to be rendered
# into the body of a subpart you can do it with the mailer's #render method
# and assign the result here.
adv_attr_accessor :body
# Specify the charset for this subpart. By default, it will be the charset
# of the containing part or mailer.
adv_attr_accessor :charset
# The content disposition of this part, typically either "inline" or
# "attachment".
adv_attr_accessor :content_disposition
# The content type of the part.
adv_attr_accessor :content_type
# The filename to use for this subpart (usually for attachments).
adv_attr_accessor :filename
# Accessor for specifying additional headers to include with this part.
adv_attr_accessor :headers
# The transfer encoding to use for this subpart, like "base64" or
# "quoted-printable".
adv_attr_accessor :transfer_encoding
# Create a new part from the given +params+ hash. The valid params keys
# correspond to the accessors.
def initialize(params)
@content_type = params[:content_type]
@content_disposition = params[:disposition] || "inline"
@charset = params[:charset]
@body = params[:body]
@filename = params[:filename]
@transfer_encoding = params[:transfer_encoding] || "quoted-printable"
@headers = params[:headers] || {}
@parts = []
end
# Convert the part to a mail object which can be included in the parts
# list of another mail object.
def to_mail(defaults)
part = TMail::Mail.new
real_content_type, ctype_attrs = parse_content_type(defaults)
if @parts.empty?
part.content_transfer_encoding = transfer_encoding || "quoted-printable"
case (transfer_encoding || "").downcase
when "base64" then
part.body = TMail::Base64.folding_encode(body)
when "quoted-printable"
part.body = [Utils.normalize_new_lines(body)].pack("M*")
else
part.body = body
end
# Always set the content_type after setting the body and or parts!
# Also don't set filename and name when there is none (like in
# non-attachment parts)
if content_disposition == "attachment"
ctype_attrs.delete "charset"
part.set_content_type(real_content_type, nil,
squish("name" => filename).merge(ctype_attrs))
part.set_content_disposition(content_disposition,
squish("filename" => filename).merge(ctype_attrs))
else
part.set_content_type(real_content_type, nil, ctype_attrs)
part.set_content_disposition(content_disposition)
end
else
if String === body
@parts.unshift Part.new(:charset => charset, :body => @body, :content_type => 'text/plain')
@body = nil
end
@parts.each do |p|
prt = (TMail::Mail === p ? p : p.to_mail(defaults))
part.parts << prt
end
part.set_content_type(real_content_type, nil, ctype_attrs) if real_content_type =~ /multipart/
end
headers.each { |k,v| part[k] = v }
part
end
private
def squish(values={})
values.delete_if { |k,v| v.nil? }
end
end
end
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