监控血库库存并发送低血型警报

• •Google Sheets API 凭证

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        "jsCode": "// Check for low blood stock levels\nconst items = $input.all();\nconst lowBloodStock = [];\n\nfor (const item of items) {\n  const bloodStock = item.json;\n  // Threshold per blood group, can be set in data or default to 10 units\n  const threshold = bloodStock.threshold || 10;\n  if (bloodStock.quantity <= threshold) {\n    lowBloodStock.push({\n      blood_group: bloodStock.blood_group,\n      quantity: bloodStock.quantity,\n      threshold: threshold,\n      alert_message: `Low blood stock alert: ${bloodStock.blood_group} has only ${bloodStock.quantity} units left (threshold: ${threshold})`\n    });\n  }\n}\n\nreturn lowBloodStock.map(blood => ({ json: blood }));\n"
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        "content": "## 工作流程"
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            "node": "Check Stock Availability",
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