mastodon reblog file name with original poster and texts posts?

[traplover4200]

how/can i have gallery-dl name the files from reblog with original poster username_reposter username_post id
and how can i save only text posts

[mikf]

name the files from reblog with original poster username_reposter username_post id

Conditional filename format strings

and how can i save only text posts

metadata postprocessor with "event": "post"

{
    "extractor": {
        "mastodon": {
            "reblogs": true,
            "text-posts": true,

            "filename": {
                "reblog": "{reblog['account']['acct']} {account['acct']} {id}_{num}.{extension}",
                ""      : "{account['acct']} {id}_{num}.{extension}"
            },

            "postprocessors": {
                "name": "metadata",
                "event": "post",
                "filename": "{id}.txt",
                "format": "{content}\n{reblog[content]:?/\n/}"
            }
        }
    }
}