Workflow: Emailreadimap Nextcloud

{
    "nodes": [
        {
            "name": "IMAP Email",
            "type": "n8n-nodes-base.emailReadImap",
            "position": [
                240,
                420
            ],
            "parameters": {
                "format": "resolved",
                "mailbox": "Invoices",
                "options": {
                    "customEmailConfig": "[\"ALL\"]"
                }
            },
            "typeVersion": 1
        },
        {
            "name": "Nextcloud",
            "type": "n8n-nodes-base.nextCloud",
            "position": [
                940,
                420
            ],
            "parameters": {
                "path": "=Documents\/Invoices\/{{$json[\"date\"]}}_{{$json[\"from\"]}}_{{$binary.file.fileName}}",
                "binaryDataUpload": true,
                "binaryPropertyName": "file"
            },
            "typeVersion": 1
        },
        {
            "name": "Map each attachment",
            "type": "n8n-nodes-base.function",
            "position": [
                620,
                420
            ],
            "parameters": {
                "functionCode": "const _ = require('lodash')\n\nconst sanitize = str => _.chain(str)\n  .replace(\/[^A-Za-z0-9&.-]\/g, '-') \/\/ sanitise via whitelist of characters\n  .replace(\/-(?=-)\/g, '') \/\/ remove repeated dashes - https:\/\/regexr.com\/6ag8h\n  .trim('-') \/\/ trim any leading\/trailing dashes\n  .truncate({\n    length: 60,\n    omission: '-' \/\/ when the string ends with '-', you'll know it was truncated\n  })\n  .value()\n\nconst result = _.flatMap(items.map(item => {\n  \/\/console.log({item})\n\n  \/\/ Maps each attachment to a separate item\n  return _.values(item.binary).map(file => {\n    console.log(\"Saving attachement:\", file.fileName, 'from:', ...item.json.from.value)\n    \n    \/\/ sanitize filename but exclude extension\n    const filename_parts = file.fileName.split('.')\n    const ext = _.slice(filename_parts, filename_parts.length-1)\n    const filename_main = _.join(_.dropRight(filename_parts), '.')\n    file.fileName = sanitize(filename_main) + '.' + ext\n    \n    return {\n      json: {\n        from: sanitize(item.json.from.value[0].name),\n        date: sanitize(new Date(item.json.date).toISOString().split(\"T\")[0]) \/\/ get date part \"2020-01-01\"\n      }, \n      binary: { file }\n    }\n  })\n}))\n\n\/\/console.log(result)\nreturn result"
            },
            "typeVersion": 1
        }
    ],
    "connections": {
        "IMAP Email": {
            "main": [
                [
                    {
                        "node": "Map each attachment",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        },
        "Map each attachment": {
            "main": [
                [
                    {
                        "node": "Nextcloud",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        }
    }
}