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module PixelatedService
class ContactsObserver
def initialize(contacts)
@contacts = contacts
end
def extract_addresses(*addrs)
addrs.flatten.compact
end
def all_receivers(mail, &block)
extract_addresses(mail.to, mail.cc, mail.bcc).each(&block)
end
def all_senders(mail, &block)
extract_addresses(mail.from).each(&block)
end
def new_receivers(before, after, &block)
(extract_addresses(after.to, after.cc, after.bcc) - extract_addresses(before.to, before.cc, before.bcc)).each(&block)
end
def new_senders(before, after, &block)
(extract_addresses(after.from) - extract_addresses(before.from)).each(&block)
end
def timestamp_from(mail)
mail.headers[:date]
end
def mail_added(mail)
timestamp = timestamp_from(mail)
all_receivers(mail) do |rcv|
@contacts.new_mail_to(rcv, timestamp)
end
all_senders(mail) do |s|
@contacts.new_mail_from(s, timestamp)
end
end
def mail_removed(mail)
end
def mail_updated(before, after)
timestamp = timestamp_from(after)
new_receivers(before, after) do |rcv|
@contacts.new_mail_to(rcv, timestamp)
end
new_senders(before, after) do |s|
@contacts.new_mail_from(s, timestamp)
end
end
end
end
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