Workflow:

{
    "\"nodes\"": "[",
    "\"id\"": "\"a80e6528-cf79-4229-8c58-6856fd86b6e7\",",
    "\"name\"": "\"Sticky Note6\",",
    "\"type\"": "\"main\",",
    "\"position\"": "[",
    "\"parameters\"": "{",
    "\"fileId\"": "{",
    "\"__rl\"": "true,",
    "\"mode\"": "\"list\",",
    "\"value\"": "\"={\\n \\\"name\\\": \\\"generate_schema\\\",\\n \\\"description\\\": \\\"Generate schema for an array of objects representing items with their descriptions, quantities, unit prices, and amounts.\\\",\\n \\\"strict\\\": true,\\n \\\"schema\\\": {\\n \\\"type\\\": \\\"object\\\",\\n \\\"required\\\": [\\n \\\"items\\\"\\n ],\\n \\\"properties\\\": {\\n \\\"items\\\": {\\n \\\"type\\\": \\\"array\\\",\\n \\\"description\\\": \\\"Array of item objects\\\",\\n \\\"items\\\": {\\n \\\"type\\\": \\\"object\\\",\\n \\\"required\\\": [\\n \\\"description\\\",\\n \\\"qty\\\",\\n \\\"unit_price\\\",\\n \\\"amount\\\"\\n ],\\n \\\"properties\\\": {\\n \\\"description\\\": {\\n \\\"type\\\": \\\"string\\\",\\n \\\"description\\\": \\\"Description of the item\\\"\\n },\\n \\\"qty\\\": {\\n \\\"type\\\": \\\"string\\\",\\n \\\"description\\\": \\\"Quantity of the item\\\"\\n },\\n \\\"unit_price\\\": {\\n \\\"type\\\": \\\"string\\\",\\n \\\"description\\\": \\\"Unit price of the item formatted as a string\\\"\\n },\\n \\\"amount\\\": {\\n \\\"type\\\": \\\"string\\\",\\n \\\"description\\\": \\\"Total amount for the item formatted as a string\\\"\\n }\\n },\\n \\\"additionalProperties\\\": false\\n }\\n }\\n },\\n \\\"additionalProperties\\\": false\\n }\\n}\"",
    "\"options\"": "{},",
    "\"operation\"": "\"create\"",
    "\"credentials\"": "{",
    "\"googleDriveOAuth2Api\"": "{",
    "\"typeVersion\"": "1",
    "\"url\"": "\"=https:\/\/api.openai.com\/v1\/chat\/completions\",",
    "\"method\"": "\"POST\",",
    "\"sendBody\"": "true,",
    "\"contentType\"": "\"multipart-form-data\",",
    "\"sendHeaders\"": "true,",
    "\"bodyParameters\"": "{",
    "\"parameterType\"": "\"formBinaryData\",",
    "\"inputDataFieldName\"": "\"data\"",
    "\"headerParameters\"": "{",
    "\"event\"": "\"fileCreated\",",
    "\"pollTimes\"": "{",
    "\"item\"": "[",
    "\"triggerOn\"": "\"specificFolder\",",
    "\"folderToWatch\"": "{",
    "\"cachedResultUrl\"": "\"https:\/\/airtable.com\/appndgSF4faN4jPXi\/tblIuVR9ocAomznzK\",",
    "\"cachedResultName\"": "\"Line Items\"",
    "\"base\"": "{",
    "\"table\"": "{",
    "\"columns\"": "{",
    "\"schema\"": "[",
    "\"display\"": "true,",
    "\"removed\"": "false,",
    "\"readOnly\"": "false,",
    "\"required\"": "false,",
    "\"displayName\"": "\"Invoices\",",
    "\"defaultMatch\"": "false,",
    "\"canBeUsedToMatch\"": "true",
    "\"mappingMode\"": "\"defineBelow\",",
    "\"matchingColumns\"": "[]",
    "\"airtableTokenApi\"": "{",
    "\"Qty\"": "\"={{ $json.qty }}\",",
    "\"Amount\"": "\"={{ parseFloat($json.amount.replace('$', '').trim()) }}\",",
    "\"Invoices\"": "\"=[\\\"{{ $('Create Invoice').item.json.id }}\\\"]\",",
    "\"Unit price\"": "\"={{ parseFloat($json.unit_price.replace('$', '').trim()) }}\",",
    "\"Description\"": "\"={{ $json.description }}\"",
    "\"jsonBody\"": "\"={\\n \\\"model\\\": \\\"gpt-4o-mini\\\",\\n \\\"messages\\\": [\\n {\\n \\\"role\\\": \\\"system\\\",\\n \\\"content\\\": {{ JSON.stringify($('Set Fields').item.json.prompt) }}\\n },\\n {\\n \\\"role\\\": \\\"user\\\",\\n \\\"content\\\": {{ JSON.stringify( JSON.stringify($('Webhook').item.json.body.json[0].items) ) }}\\n }\\n ],\\n \\\"response_format\\\":{ \\\"type\\\": \\\"json_schema\\\", \\\"json_schema\\\": {{ $('Set Fields').item.json.schema }}\\n\\n }\\n }\",",
    "\"specifyBody\"": "\"json\",",
    "\"authentication\"": "\"predefinedCredentialType\",",
    "\"nodeCredentialType\"": "\"openAiApi\"",
    "\"openAiApi\"": "{",
    "\"assignments\"": "[",
    "\"jsCode\"": "\"\/\/ Get the input from the \\\"OpenAI - Extract Line Items\\\" node\\nconst input = $(\\\"OpenAI - Extract Line Items\\\").first().json;\\n\\n\/\/ Initialize an array for the output\\nconst outputItems = [];\\n\\n\/\/ Navigate to the 'content' field in the choices array\\nconst content = input.choices[0]?.message?.content;\\n\\nif (content) {\\n try {\\n \/\/ Parse the stringified JSON in the 'content' field\\n const parsedContent = JSON.parse(content);\\n\\n \/\/ Extract 'items' and add them to the output array\\n if (Array.isArray(parsedContent.items)) {\\n outputItems.push(...parsedContent.items.map(i => ({ json: i })));\\n }\\n } catch (error) {\\n \/\/ Handle any parsing errors\\n console.error('Error parsing content:', error);\\n }\\n}\\n\\n\/\/ Return the extracted items\\nreturn outputItems;\\n\"",
    "\"webhookId\"": "\"0f7f5ebb-8b66-453b-a818-20cc3647c783\",",
    "\"path\"": "\"0f7f5ebb-8b66-453b-a818-20cc3647c783\",",
    "\"httpMethod\"": "\"POST\"",
    "\"width\"": "280,",
    "\"height\"": "626,",
    "\"content\"": "\"### Set up steps\\n\\n1. **Google Drive Trigger**: \\n - Set up a trigger to detect new files in a specified folder dedicated to invoices.\\n\\n2. **File Upload to LlamaParse**: \\n - Create an HTTP request that sends the invoice file to LlamaParse for parsing, including relevant header settings and webhook URL.\\n\\n3. **Webhook Processing**: \\n - Establish a webhook node to handle parsed results from LlamaParse, extracting needed invoice details effectively.\\n\\n4. **Invoice Record Creation**: \\n - Create initial records for invoices in your database using the parsed details received from the webhook.\\n\\n5. **Line Item Processing**: \\n - Transform string data into structured line item arrays and create individual records for each item linked to the main invoice.\"",
    "\"color\"": "7,",
    "\"pinData\"": "{},",
    "\"connections\"": "{",
    "\"Webhook\"": "{",
    "\"main\"": "[",
    "\"node\"": "\"Create Invoice\",",
    "\"index\"": "0",
    "\"Set Fields\"": "{",
    "\"Google Drive\"": "{",
    "\"Create Invoice\"": "{",
    "\"Process Line Items\"": "{",
    "\"Google Drive Trigger\"": "{",
    "\"OpenAI - Extract Line Items\"": "{"
}