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- name: Install Dovecot
  apt: pkg={{ item }}
  with_items:
    - dovecot-core
    - dovecot-ldap
    - dovecot-imapd
    - dovecot-lmtpd
    - dovecot-antispam
    - dovecot-managesieved
    - dovecot-sieve

- name: Create a user 'vmail'
  user: name=vmail system=yes
        createhome=no
        home=/home/mail
        shell=/bin/false
        password=!
        state=present

## TODO: make a LDAP query listing all users using iterate_attrs and
## iterate_filter.  (Alternatively, use a dict, see
## https://www.opensource.apple.com/source/dovecot/dovecot-293/dovecot.Config/dovecot-dict-auth.conf.ext)
## Required for dbox, see
## http://wiki2.dovecot.org/MailboxFormat/dbox#Multi-dbox
#- name: Create a nightly cron job to purge expunged messages
#  cron: name="Purge expunged messages"
#        minute=7 hour=5
#        user=vmail cron_file=doveadm-purge
#        job="/usr/bin/doveadm purge -A"

# The ownership and permissions ensure that dovecot won't try to
# deliver mails under an umounted mountpoint.
- name: Create a home directory for user 'vmail'
  file: path=/home/mail
        state=directory
        owner=root group=root
        mode=0755

- name: Create /home/mail/virtual
  file: path=/home/mail/virtual
        state=directory
        owner=vmail group=vmail
        mode=0700

- name: Create virtual mailbox directories
  file: path=/etc/dovecot/virtual/{{ item }}
        state=directory
        owner=root group=root
        mode=0755
  with_items:
    - all
    - flagged
    - recent
    - unseen

- name: Create virtual mailboxes
  copy: src=etc/dovecot/virtual/{{ item }}/dovecot-virtual
        dest=/etc/dovecot/virtual/{{ item }}/dovecot-virtual
        owner=root group=root
        mode=0644
  with_items:
    - all
    - flagged
    - recent
    - unseen

- name: Create directory /home/mail/spamspool
  file: path=/home/mail/spamspool
        state=directory
        owner=vmail group=vmail
        mode=0700

- name: Create directory /etc/dovecot/ssl
  file: path=/etc/dovecot/ssl
        state=directory
        owner=root group=root
        mode=0755

- name: Generate a private key and a X.509 certificate for Dovecot
  command: genkeypair.sh x509
                         --pubkey=/etc/dovecot/ssl/imap.fripost.org.pem
                         --privkey=/etc/dovecot/ssl/imap.fripost.org.key
                         --ou=IMAP --cn=imap.fripost.org
                         -t rsa -b 4096 -h sha512
  register: r1
  changed_when: r1.rc == 0
  failed_when: r1.rc > 1
  notify:
    - Restart Dovecot
  tags:
    - genkey

- name: Fetch Dovecot's X.509 certificate
  # Ensure we don't fetch private data
  sudo: False
  fetch: src=/etc/dovecot/ssl/imap.fripost.org.pem
         dest=certs/dovecot/
         fail_on_missing=yes
         flat=yes
  tags:
    - genkey

- name: Configure Dovecot
  copy: src=etc/dovecot/{{ item }}
        dest=/etc/dovecot/{{ item }}
        owner=root group=root
        mode=0644
  register: r2
  with_items:
    - conf.d/10-auth.conf
    - conf.d/10-logging.conf
    - conf.d/10-mail.conf
    - conf.d/10-master.conf
    - conf.d/10-ssl.conf
    - conf.d/15-mailboxes.conf
    - conf.d/20-imap.conf
    - conf.d/20-lmtp.conf
    - conf.d/90-plugin.conf
    - conf.d/90-sieve.conf
    - conf.d/auth-ldap.conf.ext
    - dovecot-ldap.conf.ext
    - dovecot-ldap-userdb.conf.ext
  notify:
    - Restart Dovecot

- name: Tell Dovecot we have a remote IMAP proxy
  # XXX: we should have an automatic lookup here
  lineinfile: dest=/etc/dovecot/dovecot.conf
              regexp='^(\s*#)?\s*login_trusted_networks\s*='
              line='login_trusted_networks = 171.25.193.76/32'
              state=present
              create=yes
              owner=root group=root
              mode=0644
  register: r3
  when: "'IMAP' in group_names and 'webmail' not in group_names"
  notify:
    - Restart Dovecot

- name: Start Dovecot
  service: name=dovecot state=started
  when: not (r1.changed or r2.changed or r3.changed)

- meta: flush_handlers