ansible-role-nagios/tasks/configure_custom_theme.yml

---
- name: Get theme
  unarchive:
    remote_src: true
    src: "{{ custom_theme_url }}"
    dest: /usr/src/nagio4_theme

- name: Get current stylesheets stats
  stat:
    path: /etc/nagios4/stylesheets
  register: stylesheets

- name: Copy old stylesheets
  copy:
    remote_src: true
    src: /etc/nagios4/stylesheets
    dest: /etc/nagios4/stylesheets_original
  when: not stylesheets.stat.islnk

- name: Remove old stylesheets
  file:
    state: absent
    path: /etc/nagios4/stylesheets
  when: not stylesheets.stat.islnk

- name: Create link to custom theme
  file:
    state: link
    path: /etc/nagios4/stylesheets
    src: /usr/src/nagio4_theme/stylesheets

- name: Get custom theme index.php stats
  stat:
    path: /usr/src/nagio4_theme/index.php
  register: index_php

- name: Backup previous index.php
  copy:
    remote_src: true
    src: /usr/share/nagios4/htdocs/index.php
    dest: /usr/share/nagios4/htdocs/index_previous.php
  when: index_php.stat.exists

- name: Copy custom index.php
  copy:
    remote_src: true
    src: /usr/src/nagio4_theme/index.php
    dest: /usr/share/nagios4/htdocs/index.php
  when: index_php.stat.exists