Add support for hardcover.app

[brianpipa]

They have an API. See if it's feasible

[brianpipa]

Did some research and this looks totally doable...

I see two thing a user would want to query:

1. The main categories (not sure what they are called in hardcover). "want-to-read", "currently-reading", etc
2. User lists

So here's the queries:
This is for the main categories:
Set these as status_id
1 = want to read
2 = currently reading
3 = read
5 = DNF
if you don't set it at all, it will use ALL

USERNAME is the @username, without the @, so if the username is @john, then the USERNAME is John

{
  user_books(
    where: {user: {username: {_eq: "USERNAME"}}, status_id: {_eq: 2}}    
    distinct_on: book_id
  ) {
    book {
      title
      slug
      rating
      image {
        url
      }
      contributions {
        author {
          name
        }
      }
    }
  }
}

Then for lists:
USERNAME is the @username, without the @, so if the username is @john, then the USERNAME is John
LISTNAME_FROM_URL - if the list URL is https://hardcover.app/@adam/lists/classics then the LISTNAME is classics

{
  users(where: {username: {_eq: "USERNAME"}}) {
    lists(where: {slug: {_eq: "LISTNAME_FROM_URL"}}) {
      list_books {
        book {
          title
          slug
          rating
      image {
        url
      }
          contributions {
            author {
              name
            }
          }
        }
      }
    }
  }
}

[brianpipa]

For image, the URL comes back like: https://assets.hardcover.app/editions/30404856/2814039534798139.jpg
but that's HUGE (994x1500). Looks like they have a resizing method - for this one it looks like
https://img.hardcover.app/enlarge?url=https://assets.hardcover.app/editions/30404856/2814039534798139.jpg&width=270&height=408&type=webp
May be worth figuring that out or putting something in place to handle images better

Looks like the Hardcover standard size is 270 width. The full size image dimensions can be retrieved then I could do a little math to figure out what the height should be for the URL. Maybe?

[brianpipa]

Done in 5.0.0