Inject nginx configuration for ldap proxy at runtime

roles/matrix-ldap-registration-proxy/tasks/init.yml

@@ -4,8 +4,55 @@
 - name: Fail if trying to self-build on Ansible < 2.8
   ansible.builtin.fail:
     msg: "To self-build the matrix_ldap_registration_proxy image, you should use Ansible 2.8 or higher. See docs/ansible.md"
-  when: "ansible_version.major == 2 and ansible_version.minor < 8 and matrix_matrix_ldap_registration_proxy_container_image_self_build and matrix_matrix_ldap_registration_proxy_enabled | bool"
+  when: "ansible_version.major == 2 and ansible_version.minor < 8 and matrix_ldap_registration_proxy_container_image_self_build and matrix_ldap_registration_proxy_enabled | bool"
 
 - ansible.builtin.set_fact:
     matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-matrix-ldap-registration-proxy.service'] }}"
-  when: matrix_matrix_ldap_registration_proxy_enabled | bool
+  when: matrix_ldap_registration_proxy_enabled | bool
+
+- block:
+   - name: Fail if matrix-nginx-proxy role already executed
+     ansible.builtin.fail:
+       msg: >-
+         Trying to append Matrix LDAP registration proxy's reverse-proxying configuration to matrix-nginx-proxy,
+         but it's pointless since the matrix-nginx-proxy role had already executed.
+         To fix this, please change the order of roles in your playbook,
+         so that the matrix-nginx-proxy role would run after the matrix-bridge-mautrix-telegram role.
+     when: matrix_nginx_proxy_role_executed | default(False) | bool
+
+   - name: Generate Matrix LDAP registration proxy proxying configuration for matrix-nginx-proxy
+     ansible.builtin.set_fact:
+       matrix_ldap_registration_proxy_matrix_nginx_proxy_configuration: |
+         location {{ matrix_ldap_registration_proxy_public_endpoint }} {
+         {% if matrix_nginx_proxy_enabled | default(False) %}
+            {# Use the embedded DNS resolver in Docker containers to discover the service #}
+            resolver 127.0.0.11 valid=5s;
+            set $backend "{{ matrix_ldap_registration_proxy_registration_addr_with_container }}";
+            proxy_pass http://$backend/register;;
+         {% else %}
+            {# Generic configuration for use outside of our container setup #}
+            proxy_pass http://{{ matrix_ldap_registration_proxy_registration_addr_sans_container }}/register;
+         {% endif %}
+         }
+
+   - name: Register Matrix LDAP registration proxy proxying configuration with matrix-nginx-proxy
+     ansible.builtin.set_fact:
+       matrix_nginx_proxy_proxy_matrix_additional_server_configuration_blocks: |
+         {{
+           matrix_nginx_proxy_proxy_matrix_additional_server_configuration_blocks | default([])
+           +
+           [matrix_ldap_registration_proxy_matrix_nginx_proxy_configuration]
+         }}
+   - name: Warn about reverse-proxying if matrix-nginx-proxy not used
+     ansible.builtin.debug:
+       msg: >-
+         NOTE: You've enabled the Matrix LDAP registration proxy bridge but are not using the matrix-nginx-proxy
+         reverse proxy.
+         Please make sure that you're proxying the `{{ matrix_ldap_registration_proxy_public_endpoint }}`
+         URL endpoint to the matrix-matrix-ldap-proxy container.
+         You can expose the container's port using the `matrix_ldap_registration_proxy_container_http_host_bind_port` variable.
+     when: "not matrix_nginx_proxy_enabled | default(False) | bool"
+
+  tags:
+   - always
+  when: matrix_ldap_registration_proxy_enabled | bool and matrix_ldap_registration_proxy_appservice_public_enabled | bool