server-desktop-01/scripts/build-n8n-workflows.rb

#!/usr/bin/env ruby
# frozen_string_literal: true
#
# Generates importable n8n workflow JSON from component pieces.
# Run: ruby scripts/build-n8n-workflows.rb
# Output: scripts/n8n-workflow-receiver.json
#         scripts/n8n-workflow-reporter.json
#
# Before running:
#   1. Complete Task 7 and verify DATATABLE_TYPE / DATATABLE_TYPE_VERSION below.
#   2. After Task 10 (credentials set up), replace REPLACE_WITH_*_CREDENTIAL_ID
#      in the generated JSON and re-run to regenerate clean files before import.

require 'json'
require 'securerandom'

SCRIPTS_DIR = File.dirname(__FILE__)

# Verify against the exported scratch-workflow JSON from Task 7.
DATATABLE_TYPE         = 'n8n-nodes-base.dataTable'
DATATABLE_TYPE_VERSION = 1

evaluate_sources_js = File.read(File.join(SCRIPTS_DIR, 'n8n-evaluate-sources.js'))
build_email_js      = File.read(File.join(SCRIPTS_DIR, 'n8n-build-email.js'))

# ── Workflow 1: Receiver ──────────────────────────────────────────────────────

receiver = {
  name: 'Backup Monitor — Receiver',
  nodes: [
    {
      parameters: {
        httpMethod: 'POST',
        path: 'backup-notify',
        authentication: 'headerAuth',
        responseMode: 'responseNode',
        options: {}
      },
      id: SecureRandom.uuid,
      name: 'Webhook',
      type: 'n8n-nodes-base.webhook',
      typeVersion: 2,
      position: [240, 300],
      webhookId: SecureRandom.uuid,
      credentials: {
        httpHeaderAuth: {
          id: 'REPLACE_WITH_BACKUP_CREDENTIAL_ID',
          name: 'backup-monitor-token'
        }
      }
    },
    {
      parameters: {
        resource: 'row',
        operation: 'insert',
        dataTableId: {
          '__rl' => true,
          mode: 'list',
          value: 'REPLACE_WITH_DATATABLE_ID',
          cachedResultName: 'backup_runs'
        },
        columns: {
          mappingMode: 'defineBelow',
          value: {
            timestamp:         '={{ $json.body.timestamp }}',
            machine:           '={{ $json.body.machine }}',
            destination:       '={{ $json.body.destination }}',
            status:            '={{ $json.body.status }}',
            bytes_transferred: '={{ $json.body.bytes_transferred }}',
            snapshot_id:       '={{ $json.body.snapshot_id }}',
            log_path:          '={{ $json.body.log_path }}',
            notes:             '={{ $json.body.notes }}'
          }
        }
      },
      id: SecureRandom.uuid,
      name: 'Insert to backup_runs',
      type: DATATABLE_TYPE,
      typeVersion: DATATABLE_TYPE_VERSION,
      position: [520, 300]
    },
    {
      parameters: {
        respondWith: 'json',
        responseBody: '={{ JSON.stringify({ ok: true }) }}',
        options: { responseCode: 200 }
      },
      id: SecureRandom.uuid,
      name: 'Respond 200',
      type: 'n8n-nodes-base.respondToWebhook',
      typeVersion: 1.1,
      position: [800, 300]
    }
  ],
  connections: {
    'Webhook'               => { main: [[{ node: 'Insert to backup_runs', type: 'main', index: 0 }]] },
    'Insert to backup_runs' => { main: [[{ node: 'Respond 200',           type: 'main', index: 0 }]] }
  },
  active: false,
  settings: { executionOrder: 'v1' },
  pinData: {},
  meta: { templateCredsSetupCompleted: true },
  tags: []
}

# ── Workflow 2: Reporter ──────────────────────────────────────────────────────

reporter = {
  name: 'Backup Monitor — Reporter',
  nodes: [
    {
      parameters: {
        rule: {
          interval: [
            {
              field: 'weeks',
              weeksInterval: 1,
              triggerAtDay: [5],
              triggerAtHour: 8,
              triggerAtMinute: 0
            }
          ]
        }
      },
      id: SecureRandom.uuid,
      name: 'Every Friday 8 AM',
      type: 'n8n-nodes-base.scheduleTrigger',
      typeVersion: 1.2,
      position: [240, 300]
    },
    {
      parameters: {
        mode: 'manual',
        includeOtherFields: false,
        assignments: {
          assignments: [
            {
              id: SecureRandom.uuid,
              name: 'sources',
              value: '={{ [{"machine":"desktop","destination":"synology"},{"machine":"desktop","destination":"backblaze-b2"},{"machine":"vps-ovh-prod-01","destination":"local"}] }}',
              type: 'arrayValue'
            }
          ]
        },
        options: {}
      },
      id: SecureRandom.uuid,
      name: 'Set sources',
      type: 'n8n-nodes-base.set',
      typeVersion: 3.4,
      position: [460, 300]
    },
    {
      parameters: {
        resource: 'row',
        operation: 'getMany',
        dataTableId: {
          '__rl' => true,
          mode: 'list',
          value: 'REPLACE_WITH_DATATABLE_ID',
          cachedResultName: 'backup_runs'
        },
        filters: {
          conditions: [
            {
              keyName: 'timestamp',
              condition: 'gt',
              keyValue: '={{ $now.minus({days: 7}).toISO() }}'
            }
          ]
        },
        options: {}
      },
      id: SecureRandom.uuid,
      name: 'Get backup_runs (last 7d)',
      type: DATATABLE_TYPE,
      typeVersion: DATATABLE_TYPE_VERSION,
      position: [680, 300]
    },
    {
      parameters: {
        mode: 'runOnceForAllItems',
        language: 'javaScript',
        jsCode: evaluate_sources_js
      },
      id: SecureRandom.uuid,
      name: 'Evaluate Sources',
      type: 'n8n-nodes-base.code',
      typeVersion: 2,
      position: [900, 300]
    },
    {
      parameters: {
        mode: 'runOnceForAllItems',
        language: 'javaScript',
        jsCode: build_email_js
      },
      id: SecureRandom.uuid,
      name: 'Build Email',
      type: 'n8n-nodes-base.code',
      typeVersion: 2,
      position: [1120, 300]
    },
    {
      parameters: {
        method: 'POST',
        url: 'https://app.mailpace.com/api/v1/send',
        authentication: 'genericCredentialType',
        genericAuthType: 'httpHeaderAuth',
        sendBody: true,
        specifyBody: 'json',
        jsonBody: '={{ { from: "REPLACE_WITH_MAILPACE_FROM_ADDRESS", to: "jaredmswanson@gmail.com", subject: $json.subject, text_body: $json.body } }}',
        options: {}
      },
      id: SecureRandom.uuid,
      name: 'Send via MailPace',
      type: 'n8n-nodes-base.httpRequest',
      typeVersion: 4.2,
      position: [1340, 300],
      credentials: {
        httpHeaderAuth: {
          id: 'REPLACE_WITH_MAILPACE_CREDENTIAL_ID',
          name: 'mailpace-token'
        }
      }
    }
  ],
  connections: {
    'Every Friday 8 AM'         => { main: [[{ node: 'Set sources',               type: 'main', index: 0 }]] },
    'Set sources'               => { main: [[{ node: 'Get backup_runs (last 7d)', type: 'main', index: 0 }]] },
    'Get backup_runs (last 7d)' => { main: [[{ node: 'Evaluate Sources',          type: 'main', index: 0 }]] },
    'Evaluate Sources'          => { main: [[{ node: 'Build Email',               type: 'main', index: 0 }]] },
    'Build Email'               => { main: [[{ node: 'Send via MailPace',         type: 'main', index: 0 }]] }
  },
  active: false,
  settings: { executionOrder: 'v1' },
  pinData: {},
  meta: { templateCredsSetupCompleted: true },
  tags: []
}

File.write(File.join(SCRIPTS_DIR, 'n8n-workflow-receiver.json'), JSON.pretty_generate(receiver))
File.write(File.join(SCRIPTS_DIR, 'n8n-workflow-reporter.json'), JSON.pretty_generate(reporter))

puts 'Generated:'
puts "  #{SCRIPTS_DIR}/n8n-workflow-receiver.json"
puts "  #{SCRIPTS_DIR}/n8n-workflow-reporter.json"