decide-core 0.1.1

A fast, lightweight permission engine for Rust and TypeScript with condition support.
Documentation 
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use rhai::{Engine, Scope};
use rhai::Dynamic;
use crate::types::{User, Resource};

pub fn evaluate_condition(expr: &str, user: &User, resource: &Resource) -> bool {
    // Create engine and scope
    let engine = Engine::new();
    let mut scope = Scope::new();

    // Exposing fields for user to use in conditions
    scope.push("user_id", Dynamic::from(user.id.clone()));
    scope.push("user_roles", Dynamic::from_array(
        user.roles.iter().map(|r| Dynamic::from(r.clone())).collect()
    ));
    scope.push("resource_owner", Dynamic::from(resource.owner_id.clone()));
    scope.push("resource_name", Dynamic::from(resource.resource_name.clone()));
    scope.push("resource_type", Dynamic::from(resource.resource_type.clone()));

    match engine.eval_with_scope::<bool>(&mut scope, expr) {
        Ok(result) => result,
        Err(e) => {
            // Return value
            false
        }
    }
}