---
- name: Collect Prosody Onion domains.
  register: onion_result
  shell: >
    cat {{ tor_onion_services_dir | default('/var/lib/tor') + '/' + item.name + '/hostname' | quote }}
    | cut -d ' ' -f 1 | sort | uniq
  loop: "{{ prosody_virtualhost_onions }}"
  changed_when: false

- name: Register Prosody Onion VirtualHosts.
  when: not ansible_check_mode
  set_fact:
    prosody_onion_virtualhosts: "{{ onion_result.results | map(attribute='stdout_lines') | list | flatten | unique }}"

# This task is a bit of a clever hack: it updates the `prosody_config`
# dictionary in-place by using the `|combine()` filter, after looping
# over the `options` dictionary in the `prosody_virtualhost_onions`
# variable. In order to do this entirely in a single task, some Jinja
# tricks are employed, notably using no-op `if` blocks to actually
# update the values of the items in the `item.1.options` dictionary.
- name: Insert Prosody Onion VirtualHosts to Prosody configuration.
  when: prosody_onion_virtualhosts is defined
  set_fact:
    prosody_config: >-
      {%- if item.1.options is defined -%}
      {%- for k, v in item.1.options.items() -%}
        {%- if v is string -%}
          {%- if item.1.options.update({k: v | replace('__PROSODY_DOMAIN__', item.0)}) -%}{%- endif -%}
        {%- elif v is mapping -%}{#- TODO: Handle dictionaries as well? -#}
        {%- elif v is sequence -%}
          {%- for x in v -%}
            {%- if item.1.options[k].__setitem__(loop.index0, x | replace('__PROSODY_DOMAIN__', item.0)) -%}{%- endif -%}
          {%- endfor -%}
        {%- endif -%}
      {%- endfor -%}
      {%- endif -%}
      {{ prosody_config | combine({
          'VirtualHosts': prosody_config.VirtualHosts + [{
              'domain': item.0
          } | combine(item.1.options | default({}), recursive=True)]
      }, recursive=True) }}
  loop: "{{ prosody_onion_virtualhosts | product(prosody_virtualhost_onions) | list }}"