WFDASH-WEBAPP/n8n_workfows/WFDASH — Purchase Order Send.json

{
  "name": "WFDASH — Purchase Order Send",
  "description": "Sends supplier PO emails with the latest PO PDF attached. Fired by Next.js route /api/v1/purchase-orders/[id]/send-email after it builds the full render-ready payload (recipient + subject + body + PDF attachment URL + AGENT_API_KEY + dashboard base URL). n8n never reads PocketBase or env vars directly. Records success/failure back to the dashboard via the outcome callback route.",
  "tags": [
    { "name": "wfdash", "id": "wf-tag-wfdash" }
  ],
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "wf-po-send",
        "responseMode": "lastNode",
        "options": {}
      },
      "id": "wf-po-send-webhook",
      "name": "PO Send Webhook",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2,
      "position": [0, 0],
      "webhookId": "wf-po-send"
    },
    {
      "parameters": {
        "jsCode": "// Resolve any attachment URLs into { name, content (base64), type }\n// entries the n8n emailSend node accepts. Returns the original input\n// shape unchanged when there are no attachments.\n//\n// n8n Code node: no $env.* access in this environment\n// (N8N_BLOCK_ENV_ACCESS_IN_NODE=true in docker-compose). The dashboard\n// route pushes everything we need (incl. the agentApiKey Bearer\n// credential) on the webhook body. The file proxy whitelist now\n// includes purchase_orders so the GET succeeds without further auth\n// headers from the cookie-less n8n-worker.\nconst first = ($input.first() || {}).json || {};\nconst body = first.body || first;\nconst attachments = body.attachments || [];\nconst agentApiKey = body.agentApiKey || '';\n\nif (!Array.isArray(attachments) || attachments.length === 0) {\n  return [{ json: { ...first, body: { ...body, attachments: [] }, attachmentsResolved: [] } }];\n}\n\nconst resolved = [];\nfor (const att of attachments) {\n  try {\n    const res = await this.helpers.httpRequest({\n      method: 'GET',\n      url: att.url,\n      headers: agentApiKey\n        ? { 'Authorization': 'Bearer ' + agentApiKey }\n        : {},\n      encoding: 'base64',\n      returnBinary: false,\n      timeout: 15000,\n    });\n    resolved.push({\n      name: att.filename || 'attachment.pdf',\n      content: typeof res === 'string' ? res : (res && res.data) || '',\n      type: att.contentType || 'application/pdf',\n    });\n  } catch (err) {\n    return [{ json: {\n      ...first,\n      body: {\n        ...body,\n        attachments: [],\n        _attachmentFetchError: 'PDF fetch failed: ' + (err.message || String(err)),\n      },\n      attachmentsResolved: [],\n    } }];\n  }\n}\n\nreturn [{ json: {\n  ...first,\n  body: { ...body, attachments: [] },\n  attachmentsResolved: resolved,\n} }];"
      },
      "id": "wf-po-send-fetch-pdf",
      "name": "Fetch PDF attachment bytes",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [220, 0]
    },
    {
      "parameters": {
        "fromEmail": "={{ $json.body.fromEmail || 'orders@wfdash.local' }}",
        "toEmail": "={{ $json.body.recipient }}",
        "ccEmail": "={{ $json.body.cc }}",
        "bccEmail": "={{ $json.body.bcc }}",
        "subject": "={{ $json.body.subject }}",
        "text": "={{ $json.body.body }}",
        "html": "={{ $json.body.body }}",
        "options": {
          "attachments": "={{ $json.attachmentsResolved && $json.attachmentsResolved.length ? $json.attachmentsResolved : [] }}"
        }
      },
      "id": "wf-po-send-smtp",
      "name": "Send PO email (SMTP)",
      "type": "n8n-nodes-base.emailSend",
      "typeVersion": 2.1,
      "position": [440, 0]
    },
    {
      "parameters": {
        "jsCode": "// Resolve the SMTP result from the Send PO email (SMTP) node, then\n// POST the outcome back to the dashboard's\n// /api/v1/purchase-orders/[id]/send-email/outcome route. The dashboard\n// owns the canonical write (status flip + order_items.item_status flip)\n// using its own admin PB auth. n8n never carries the admin token.\n//\n// The Bearer key and dashboard base URL are pushed on the webhook body\n// (not $env.*) because the docker-compose has\n// N8N_BLOCK_ENV_ACCESS_IN_NODE=true — Code nodes cannot read env vars\n// at runtime.\nconst first = ($input.first() || {}).json || {};\nconst body = first.body || first;\nconst agentApiKey = body.agentApiKey || '';\nconst dashboardBase = (body.dashboardBaseUrl || '').replace(/\\/$/, '');\nconst poId = body.poId;\n\nif (!agentApiKey) {\n  return [{ json: {\n    poId,\n    ok: false,\n    error: 'agentApiKey missing from webhook body — route did not push it',\n  } }];\n}\nif (!dashboardBase) {\n  return [{ json: {\n    poId,\n    ok: false,\n    error: 'dashboardBaseUrl missing from webhook body — route did not push it',\n  } }];\n}\n\nconst sendResult = ($('Send PO email (SMTP)').first().json) || {};\nconst ok = !sendResult.error && sendResult.ok !== false;\nconst messageId = sendResult.messageId || sendResult.message_id || '';\nconst errorMessage = ok ? '' : (sendResult.error || sendResult.response || 'Unknown SMTP error').toString().slice(0, 990);\n\ntry {\n  const out = await this.helpers.httpRequest({\n    method: 'POST',\n    url: dashboardBase + '/api/v1/purchase-orders/' + poId + '/send-email/outcome',\n    headers: {\n      'Content-Type': 'application/json',\n      'Authorization': 'Bearer ' + agentApiKey,\n    },\n    json: true,\n    body: {\n      outcome: ok ? 'success' : 'failure',\n      messageId,\n      errorMessage,\n    },\n  });\n  return [{ json: { poId, ok, messageId, error: errorMessage, outcome: out } }];\n} catch (err) {\n  return [{ json: {\n    poId,\n    ok,\n    messageId,\n    error: 'Outcome callback failed: ' + (err.message || String(err)),\n  } }];\n}"
      },
      "id": "wf-po-send-record-outcome",
      "name": "Record outcome to PB",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [660, 0]
    }
  ],
  "connections": {
    "PO Send Webhook": {
      "main": [
        [
          {
            "node": "Fetch PDF attachment bytes",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Fetch PDF attachment bytes": {
      "main": [
        [
          {
            "node": "Send PO email (SMTP)",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Send PO email (SMTP)": {
      "main": [
        [
          {
            "node": "Record outcome to PB",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1",
    "saveDataSuccessExecution": "all",
    "saveDataErrorExecution": "all",
    "saveManualExecutions": true,
    "saveExecutionProgress": true,
    "timezone": "Africa/Johannesburg"
  },
  "staticData": null,
  "pinData": {},
  "versionId": 1,
  "triggerCount": 1,
  "meta": {
    "instanceId": "wfdash-po-send",
    "templateCredsSetupCompleted": false,
    "description": "After import: open the workflow, attach an SMTP credential to the 'Send PO email (SMTP)' node (any name; the SDK does not pin a credential id). Then activate."
  }
}