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# encoding: utf-8
# frozen_string_literal: true
#
# = Message-ID Field
#
# The Message-ID field inherits from StructuredField and handles the
# Message-ID: header field in the email.
#
# Sending message_id to a mail message will instantiate a Mail::Field object that
# has a MessageIdField as its field type. This includes all Mail::CommonMessageId
# module instance metods.
#
# Only one MessageId field can appear in a header, and syntactically it can only have
# one Message ID. The message_ids method call has been left in however as it will only
# return the one message id, ie, an array of length 1.
#
# Note that, the #message_ids method will return an array of message IDs without the
# enclosing angle brackets which per RFC are not syntactically part of the message id.
#
# == Examples:
#
# mail = Mail.new
# mail.message_id = '<F6E2D0B4-CC35-4A91-BA4C-C7C712B10C13@test.me.dom>'
# mail.message_id #=> '<F6E2D0B4-CC35-4A91-BA4C-C7C712B10C13@test.me.dom>'
# mail[:message_id] #=> '#<Mail::Field:0x180e5e8 @field=#<Mail::MessageIdField:0x180e1c4
# mail['message_id'] #=> '#<Mail::Field:0x180e5e8 @field=#<Mail::MessageIdField:0x180e1c4
# mail['Message-ID'] #=> '#<Mail::Field:0x180e5e8 @field=#<Mail::MessageIdField:0x180e1c4
#
# mail[:message_id].message_id #=> 'F6E2D0B4-CC35-4A91-BA4C-C7C712B10C13@test.me.dom'
# mail[:message_id].message_ids #=> ['F6E2D0B4-CC35-4A91-BA4C-C7C712B10C13@test.me.dom']
#
require 'mail/fields/common/common_message_id'
module Mail
class MessageIdField < StructuredField
include Mail::CommonMessageId
FIELD_NAME = 'message-id'
CAPITALIZED_FIELD = 'Message-ID'
def initialize(value = nil, charset = 'utf-8')
self.charset = charset
@uniq = 1
if Utilities.blank?(value)
self.name = CAPITALIZED_FIELD
self.value = generate_message_id
else
super(CAPITALIZED_FIELD, strip_field(FIELD_NAME, value), charset)
end
self.parse
self
end
def name
'Message-ID'
end
def message_ids
[message_id]
end
def to_s
"<#{message_id}>"
end
def encoded
do_encode(CAPITALIZED_FIELD)
end
def decoded
do_decode
end
private
def generate_message_id
"<#{Mail.random_tag}@#{::Socket.gethostname}.mail>"
end
end
end
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