bug: Incorrect Scrobble Modification Documentation

[PierreSenpai]

Please check existing knowledge before opening an issue

• I have checked the FAQ and documentation
• I have searched through existing issues and discussions.

Describe the Bug

I was following the documentation on how to modify the artists field before the scrobble gets send to last.fm. I changed my config.json to this

...
"sources": [
    {
	"type": "vlc",
	"enable": true,
	"name": "MyVlc",
	"data": {
	    "url": "localhost:8080",
	    "password": "123"
	},
	"options": {
	    "playTransform": {
		"preCompare": {
		    "artists": [
			[
			    "/(?<!^K)/[^ ].*/"
			]
		    ]
	        },
	    }
	}
    }
],
...

but starting multi-scrobbler gives multiple schema errors (see log).
To fix this, I asked ChatGPT and changed this part to the following, which works fine.

"sources": [
    {
	"type": "vlc",
	"enable": true,
	"name": "MyVlc",
	"data": {
	    "url": "localhost:8080",
	    "password": "123"
	},
	"options": {
	    "playTransform": {
		"preCompare": [
                    {
		        "artists": [
			    "/(?<!^K)/[^ ].*/"
			]
		    }
	        ]
	    }
	}
    }
],

Platform

Local (NodeJS)

Versions

• multi-scrobbler 0.9.1
• nodejs 22.13.1

Logs

[2025-01-26 13:34:01.326 +0100] ERROR  : [App] [Sources] Source config 1 (vlc - MyVlc) in config.json is invalid and will not be used.
Error: Source config 1 (vlc - MyVlc) in config.json is invalid and will not be used.
    at ScrobbleSources.buildSourcesFromConfig (CWD\src\backend\sources\ScrobbleSources.ts:213:33)
    at async <anonymous> (CWD\src\backend\index.ts:121:9)
caused by: Error: Json config was not valid. Please use schema to check validity.

Schema Error:
At: /options/playTransform/preCompare
type: #/type => must be array

Schema Error:
At: /options/playTransform/preCompare/artists/0
type: #/anyOf/0/type => must be string

Schema Error:
At: /options/playTransform/preCompare/artists/0
type: #/type => must be object

Schema Error:
At: /options/playTransform/preCompare/artists/0
anyOf: #/anyOf => must match a schema in anyOf

Schema Error:
At: /options/playTransform/preCompare
anyOf: #/anyOf => must match a schema in anyOf
    at validateJson (CWD\src\backend\utils\ValidationUtils.ts:59:15)
    at ScrobbleSources.buildSourcesFromConfig (CWD\src\backend\sources\ScrobbleSources.ts:211:21)
    at async <anonymous> (CWD\src\backend\index.ts:121:9)

Additional Context

No response

[FoxxMD]

Thanks for spotting this issue. There was an extra array in the lastfm title example that has now been removed.