Blitzbase is a project inspired by pocketbase & supabase with realtime subscriptions and a simple REST API written in go.
(make sure that sqlite is installed in your device.)
$ go run ./cmd/
Extended parser from Writing An Interpreter In Go, highly recommend the book.
This is a lexer and parser lib for use in Blitzbase. It is used to parse the language for assigning access permission for collections. Extra features in this particular parser include, property accessors parser for syntax like, collection.name or $request.auth.id.
The parser parses expression in a right-to-left manner, no operator precedence in this parser.
A statement like this
$request.data.is_valid_date & collection.exists | collection.id != 10;
will be parsed as such;
($request.data.count != (collection.exists | (collection.id = 10)))
This language is supposed to have only one statement in the entire program, we chain a bunch of expressions to evaluate if the request to access the collection or any kind of data is valid or not.
This is inspired by pocketbase's access permission language. To check permission use $request and the request is supposed to have, these attributes for now,
- auth: includes record data of the auth-collection which the auth_token points to.
- data: contains the data coming with the request, in case of POST/PUT/PATH requests.
- method: is the request method, GET/POST/PUT/PATCH/DELETE...
So, an example check could be,
$request.auth.name ~= $request.data.name
This is supposed to check, the tokens, auth-record name to the name field in the incoming data and run a LIKE check on them, and if it passes then request will be able to access the collection.