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 AdvAttrAccessor, PartContainer, Utils # 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 = [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