- name: stat current zone file
  stat:
    path: /etc/nsd/{{ zone.name }}.zone
  register: current_zone_file

- name: get current serial
  command: dig @{{ zone.slave_nameservers | first | default('127.0.0.1') }} +short SOA {{ zone.name }}
  register: zone_soa
  changed_when: no

- name: check if zone serial needs to be regenerated
  block:
    - name: create temporary zone file
      copy:
        content: |
          {{ nsd_soa_block }}
          {{ zone.content }}
        dest: /tmp/.ansible-{{ zone.name }}.zone.tmp
      vars:
        serial: '{{ zone_soa.stdout.split()[2] | default(nsd_init_serial) }}'
      changed_when: no

    - name: stat temporary zone file
      stat:
        path: /tmp/.ansible-{{ zone.name }}.zone.tmp
      register: temp_zone_file

    - name: remove temporary zone file
      file:
        path: /tmp/.ansible-{{ zone.name }}.zone.tmp
        state: absent
      changed_when: no
  when: current_zone_file.stat.exists

- name: generate zone file
  copy:
    content: |
      {{ nsd_soa_block }}
      {{ zone.content }}
    dest: /etc/nsd/{{ zone.name }}.zone
  vars:
    serial: >-
      {{
      nsd_init_serial if not zone_soa.stdout.split()[2]
      else
      (zone_soa.stdout.split()[2] | int) if ((not current_zone_file.stat.exists) or current_zone_file.stat.checksum == temp_zone_file.stat.checksum)
      else
      (zone_soa.stdout.split()[2] | int) + 1
      }}
  notify: reload nsd