feat(nodered): add export external nodes playbook

this playbook queries the `/nodes` API from node-RED
and obtain the information external nodes and try downloading
it from NPM registry as tarballs in the `deploy_dir/nodered`
directory

Closes #110

Signed-off-by: Shantanoo 'Shan' Desai <[email protected]>

.vscode/settings.json

@@ -3,6 +3,7 @@
         "https://raw.githubusercontent.com/ansible/ansible-lint/main/src/ansiblelint/schemas/ansible.json#/$defs/playbook": [
             "generate_stack.yml",
             "export_flow_nodered.yml",
+            "export_nodes_nodered.yml",
             "tests/test_*.yml"
         ],
         "https://raw.githubusercontent.com/ansible/ansible-lint/main/src/ansiblelint/schemas/ansible.json#/$defs/tasks": [

export_nodes_nodered.yml

@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+#
+# Komponist - Generate Your Favourite Compose Stack With the Least Effort
+#
+# Copyright (C) 2023  Shantanoo "Shan" Desai <[email protected]>
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU Affero General Public License as published
+#   by the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU Affero General Public License for more details.
+#
+#   You should have received a copy of the GNU Affero General Public License
+#   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# export_nodes_nodered.yml: Ansible Playbook that exports any external Node-RED nodes
+# for offline installation
+---
+- name: Export Node-RED Nodes from Node-RED for Offline Installation
+  hosts: localhost
+  gather_facts: true
+  vars_files:
+    - vars/config.yml
+    - vars/creds.yml
+  module_defaults:
+    ansible.builtin.uri:
+      method: POST
+      headers:
+        Content-Type: application/json
+
+  tasks:
+    - name: Get Node-RED user with all Privileges
+      ansible.builtin.set_fact:
+        nodered_creds: "{{ item }}"
+      when: "item.permissions is defined and item['permissions'] == '*'"
+      loop: "{{ credentials.nodered.users }}"
+      no_log: true
+
+    - name: Obtain Authentication Token
+      ansible.builtin.uri:
+        url: "http://localhost/nodered/auth/token"
+        body:
+          client_id: node-red-admin
+          grant_type: password
+          scope: "{{ nodered_creds.permissions }}"
+          username: "{{ nodered_creds.username }}"
+          password: "{{ nodered_creds.password }}"
+        body_format: json
+        status_code: 200
+      register: auth_token
+      when: nodered_creds is defined
+
+    - name: Lookup Nodes from Node-RED instance
+      ansible.builtin.set_fact:
+        node_set: "{{ lookup('ansible.builtin.url', 'http://localhost/nodered/nodes', headers=headers) }}"
+      vars:
+        headers:
+          Accept: application/json
+          Authorization: "{{ auth_token.json.token_type }} {{ auth_token.json.access_token }}"
+
+    - name: External Nodes in Node-RED instance
+      ansible.builtin.get_url:
+        url: "https://registry.npmjs.org/{{ item.module }}/-/{{ item.module }}-{{ item.version }}.tgz"
+        dest: "{{ komponist.deploy_dir }}/nodered/"
+        mode: "0640"
+      loop: "{{ node_set }}"
+      when: item.module != 'node-red'
+
+    - name: Revoke Authentication Token
+      ansible.builtin.uri:
+        url: http://localhost/nodered/auth/revoke
+        headers:
+          Authorization: "{{ auth_token.json.token_type }} {{ auth_token.json.access_token }}"
+        body:
+          token: "{{ auth_token.json.access_token }}"
+        body_format: json
+        status_code: 200