Civitai support for inline queries

[jacklul]

They have pretty straightforward API.
Can be used without an API key, though any kind of NSFW content won't be returned.

I have no idea about Rust, completely different language to what I've been working with so far so I won't even attempt at PRing or vibecoding it.

These are what I'm using in my bot:

Regex: civitai\.(?:com|red)/(?P<type>posts|images)/(?P<id>\d+)
Endpoint: GET https://civitai.com/api/v1/images (handles both civitai.com and civitai.red)
Auth header: Authorization: Bearer <API KEY>

Query parameters:

• limit - default is 50, I've set it to 200 but I doubt you will ever see that many results
• page if you decide to fetch more than 200
• browsingLevel - filtering bitmask, use 16 to be able to view everything (equivalent to deprecated nsfwLevel=X)
• postId if requesting images of a post (type=posts)
• imageId if requesting single image (type=images)

Results will be at json.items[] array.
Each result has url, type (image, video), username fields, no thumbnails.
Linking to author - probably a good idea to link https://civitai.red/user/<username> for NSFW images and https://civitai.com/user/<username> for non-NSFW images as they are a different gallery listings.

Video results - I guess they must be skipped because Civitai does not provide any thumbnail for them.

Full endpoint docs: https://developer.civitai.com/site/reference/images

Potential issues:

Regex might conflict with e621/e926/e6ai as they both have /posts/ in URL path.