---
- name: Patching and Updating Linux Systems
  hosts: all
  become: true
  vars:
   GOTIFY_IP: xxx #[Your gotify host IP goes here]
   GOTIFY_PORT: xxx #[Your gotify port goes here]
   GOTIFY_TOKEN: xxx #[Your app token goes here]  
   ansible_python_interpreter: /usr/bin/python3

  tasks:
    - name: Update Debian-based Systems
      when: ansible_os_family == 'Debian' or ansible_os_family == 'Ubuntu'
      apt:
        update_cache: yes
        upgrade: dist

    - name: Update RHEL-based Systems
      when: ansible_os_family == 'RedHat'
      yum:
        name: '*'
        state: latest

    - name: List installed and updated packages
      shell: grep -E "^$(date +%Y-%m-%d).+ (install|upgrade) " /var/log/dpkg.log |cut -d " " -f 3-5
      register: result 

    - name: Check if Docker is installed
      command: which docker
      register: docker_installed
      ignore_errors: true
      changed_when: false

    - name: Upgrade Python pip modules for Docker support (only if Docker is installed)
      when: docker_installed.rc == 0 and ansible_os_family == 'RedHat'
      pip:
        name:
          - docker
          - requests
        state: latest
        executable: pip3  

    - name: Show Output of updated files
      debug: msg="{{ result.stdout_lines }}"

    - name: Check if reboot is required
      stat:
        path: /var/run/reboot-required
      register: reboot_required_file

    - name: Show Output of required reboots
      debug: msg="{{ reboot_required_file.stat.exists == true }}" 

    - name: Rebooting machine
      shell: sleep 2 && shutdown -r now "Ansible updates triggered"
      async: 1
      poll: 0
      ignore_errors: true
      when: reboot_required_file.stat.exists

    - name: Waiting for the machine to come back
      local_action: wait_for host={{ ansible_host }} state=started port=22 delay=30
      become: false
      when: reboot_required_file.stat.exists
###
    - name: Remove DNF dependencies that are no longer required.
      when: ansible_os_family == 'RedHat'
      ansible.builtin.dnf:
        autoremove: yes

    - name: Remove APT dependencies that are no longer required.
      when: ansible_os_family == 'Debian' or ansible_os_family == 'Ubuntu'
      ansible.builtin.apt:
        autoremove: yes        

    - name: notify via Gotify
      uri:
        url: 'http://{{ GOTIFY_IP }}:{{ GOTIFY_PORT }}/message?token={{ GOTIFY_TOKEN }}'
        method: POST
        body:
          title:
            content: All Packages Update
          message: 
            content: The upgrade-packages playbook has completed for {{ ansible_host }} and is now updated. A required reboot is {{ reboot_required_file.stat.exists == true }}.
          priority:
            content: '5'
        body_format: form-multipart
      register: result
...