Excel Generator /generate endpoint throws error when excelConfigs missing; TypingMind UI omits this field

[mmynsted]

Describe the Bug

When using the Excel Generator server plugin (/excel-generator/generate endpoint) with the standard TypingMind personal (license) app, the plugins-server throws an error if the excelConfigs field is missing from the request body. However, TypingMind’s built-in Excel Generator plugin only sends the sheetsData field and does not provide excelConfigs.

As a result, the server returns a 500 error, and the plugin cannot be used without code modification.

Steps to Reproduce

1. Deploy plugins-server from main branch (latest).
2. In TypingMind, set the Excel Generator's Plugin Server setting to point to the deployed server (e.g. http://localhost:3000/excel-generator). Replace localhost with the actual ip address, if applicable.
3. In chat, trigger the Excel Generator plugin with a prompt like "Create an Excel file with a ‘Sales’ sheet".
4. Observe: Internal server error (500) is returned by /excel-generator/generate, and the plugin does not produce a file.

Here is the docker-compose I am using to run the plugin server. (I redacted the IP address.)

version: '3.8'

services:
  plugin-server:
    build: .
    ports:
      - "3000:3000"
    restart: unless-stopped
    volumes:
      - ./data:/app/data 
    environment:
      - PUBLIC_HOST=http://redacted:3000

1. Plugin: Excel Generator
2. Actions: Attempt to generate any excel file.
3. Configuration: Configure with defaults.

Expected Behavior

• The plugins-server should gracefully handle cases where excelConfigs is missing or undefined (treating it as {}).
• Users should be able to use the Excel Generator plugin in TypingMind without supplying excelConfigs (keeping backwards compatibility).

** Proposed fix **

In /src/routes/excelGenerator/:

• Change code to default excelConfigs to an empty object if missing:

  const excelConfigs = body.excelConfigs ?? {};

Environment Information

• TypingMind Proxy Version: Main, hash 8af113f1a42.
• Plugin Name and Version: Excel Generator, hosted version is from the plugin sever main, hash 8af113f1a42.
• Operating System: Host from uname is Linux amber 5.10.0-34-amd64 #1 SMP Debian 5.10.234-1 (2025-02-24) x86_64 GNU/Linux
• Browser (if applicable): Firefox 138.0.4 (aarch64)
• Other Relevant Software: TypingMind Latest version running in Firefox as of 2025-05-26.

Visuals (Optional but Helpful)

• Screenshots:

• Code Snippets: Here is what is sent to the server, reproduced using curl. The ip address is redacted.

curl -X 'POST' \
  'http://redacted:3000/excel-generator/generate' \
  -H 'accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{"sheetsData":[{"sheetName":"Sales Report","tables":[{"columns":[{"name":"Product","type":"string"},{"type>   'http://redacted:3000/excel-generator/generate' \
>   -H 'accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{"sheetsData":[{"sheetName":"Sales Report","tables":[{"columns":[{"name":"Product","type":"string"},{"type":"number","name":"Quantity"},{"name":"Price","type":"currency","format":"$#,##0.00"}],"rows":[[{"type":"static_value","value":"Product A"},{"type":"static_value","value":"10"},{"type":"static_value","value":"5.99"}],[{"type":"static_value","value":"Product B"},{"type":"static_value","value":"5"},{"type":"static_value","value":"12.50"}]],"title":"Sales Data","startCell":"A1"}]}]}'
>   -H 'Content-Type: application/json' \
>   -d '{"sheetsData":[{"sheetName":"Sales Report","tables":[{"columns":[{"name":"Product","type":"string"},{"type":"number","name":"Quantity"},{"name":"Price","type":"currency","format":"$#,##0.00"}],"rows":[[{"type":"static_value","value":"Product A"},{"type":"static_value","value":"10"},{"type":"static_value","value":"5.99"}],[{"type":"static_value","value":"Product B"},{"type":"static_value","value":"5"},{"type":"static_value","value":"12.50"}]],"title":"Sales Data","startCell":"A1"}]}]}'
{"success":false,"message":"Error Cannot read properties of undefined (reading 'fontFamily')","responseObject":"Sorry, we couldn't generate excel file.","statusCode":500}

Additional Context

• Error Messages:

{"level":50,"time":1748311896837,"pid":31,"hostname":"e65d9d431da0","request":{"id":"eb70695f-fd88-4bf6-9ed0-62e24f67790d","method":"POST","url":"/excel-generator/generate",...},"response":{"statusCode":500,"headers":{...}},"error":{"type":"Error","message":"failed with status code 500","stack":"Error: failed with status code 500\n    at onResFinished ..."},"timeTaken":11,"msg":"request errored with status code: 500"}

Basically: Error Cannot read properties of undefined (reading 'fontFamily')

• Impact: Causes the Excel plugin to fail using default values and exiting code.