matrix-docker-ansible-deploy/roles/custom/matrix-element-call/tasks/update_element_web_config.yml

- name: Load Element Web config.json content
  ansible.builtin.slurp:
    src: "{{ element_web_config_path }}"
  register: element_web_config_content_raw
  ignore_errors: no

- name: Parse Element Web config.json content
  ansible.builtin.set_fact:
    element_web_config_content: "{{ element_web_config_content_raw['content'] | b64decode | from_json }}"
  when: element_web_config_content_raw is defined and element_web_config_content_raw['content'] is defined

- name: Update Element Web config.json settings
  ansible.builtin.set_fact:
    element_web_config_content:
      "{{ element_web_config_content | combine({
        'features': {
          'feature_video_rooms': true,
          'feature_new_room_decoration_ui': true,
          'feature_group_calls': true,
          'feature_element_call_video_rooms': true
        },
        'element_call': {
          'url': 'https://{{ matrix_element_call_domain }}',
          'participant_limit': 8,
          'brand': 'Element Call',
          'use_exclusively': true
        }
      }, recursive=True) }}"
  when: element_web_config_content is defined

- name: Write updated Element Web config.json back to disk
  ansible.builtin.copy:
    content: "{{ element_web_config_content | to_nice_json }}"
    dest: "{{ element_web_config_path }}"
    mode: '0644'
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_groupname }}"
  when: element_web_config_content is defined