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# OCaml SSR React APP on Eio
This app is a WIP to implement a blog as a React webapp using Ocaml, mlx for JSX, Piaf for HTTP handling, Caqti to handle database queries, using Eio across the app for async.
## Build the app
To compile the app and see if the code is correct do:
`dune clean && dune build`
## Things to take into account
### Ocaml Routes library
#### The `@-->` Operator
The `@-->` operator is from the `routes` library and is used to bind route patterns to handler functions.
##### Example:
```ocaml
`GET, (s "posts" /? nil) @--> Handler.get_posts
```
##### Breaking it down:
- `s "posts"` - matches the string "posts" in the URL path
- `/?` - path concatenation operator
- `nil` - end of path (no more segments)
- `@-->` - "maps to" operator that binds the route to the handler
So `(s "posts" /? nil) @--> Handler.get_posts` means "the route `/posts` maps to the `Handler.get_posts` function".
##### Other common operators in the routes library:
- `/:` for path parameters (e.g., `s "user" /: int /? nil` matches `/user/123`)
- `//` for wildcard paths
- `<$>` for transforming matched values
It's a DSL (domain-specific language) for expressing routes in a concise, type-safe way.
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