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module Griddler
module Mailgun
class Adapter
attr_reader :params
def initialize(params)
@params = params
end
def self.normalize_params(params)
adapter = new(params)
adapter.normalize_params
end
def normalize_params
{
to: to_recipients,
cc: cc_recipients,
bcc: Array.wrap(param_or_header(:Bcc)),
from: determine_sender,
subject: params[:subject],
text: params['body-plain'],
html: params['body-html'],
attachments: attachment_files,
headers: serialized_headers,
vendor_specific: {
stripped_text: params["stripped-text"],
stripped_signature: params["stripped-signature"],
stripped_html: params["stripped-html"]
}
}
end
private
def determine_sender
sender = param_or_header(:From)
sender ||= params[:sender]
end
def to_recipients
to_emails = param_or_header(:To)
to_emails ||= params[:recipient]
to_emails.split(',').map(&:strip)
end
def cc_recipients
cc = param_or_header(:Cc) || ''
cc.split(',').map(&:strip)
end
def headers
@headers ||= extract_headers
end
def extract_headers
extracted_headers = {}
if params['message-headers']
parsed_headers = JSON.parse(params['message-headers'])
parsed_headers.each{ |h| extracted_headers[h[0]] = h[1] }
end
ActiveSupport::HashWithIndifferentAccess.new(extracted_headers)
end
def serialized_headers
# Griddler expects unparsed headers to pass to ActionMailer, which will manually
# unfold, split on line-endings, and parse into individual fields.
#
# Mailgun already provides fully-parsed headers in JSON -- so we're reconstructing
# fake headers here for now, until we can find a better way to pass the parsed
# headers directly to Griddler
headers.to_a.collect { |header| "#{header[0]}: #{header[1]}" }.join("\n")
end
def param_or_header(key)
if params[key].present?
params[key]
elsif headers[key].present?
headers[key]
else
nil
end
end
def attachment_files
if params["attachment-count"].present?
attachment_count = params["attachment-count"].to_i
attachment_count.times.map do |index|
params.delete("attachment-#{index+1}")
end
else
params["attachments"] || []
end
end
end
end
end