Function validate_label_selector

crates/openshell-server/src/grpc/validation.rs:540–573

Validate a label selector string format. Format: "key1=value1,key2=value2" Each key and value is validated using `validate_label_key` and `validate_label_value`. Empty selectors are allowed. Trailing commas are ignored.

(selector: &str)

/// Each key and value is validated using `validate_label_key` and `validate_label_value`.
/// Empty selectors are allowed. Trailing commas are ignored.
pub(super) fn validate_label_selector(selector: &str) -> Result<(), Status> {
    if selector.trim().is_empty() {
        return Ok(());
    }

    for pair in selector.split(',') {
        let pair = pair.trim();
        if pair.is_empty() {
            continue;
        }

        let parts: Vec<&str> = pair.splitn(2, '=').collect();
        if parts.len() != 2 {
            return Err(Status::invalid_argument(format!(
                "invalid label selector: expected 'key=value', got '{pair}'"
            )));
        }

        let key = parts[0].trim();
        let value = parts[1].trim();

        if key.is_empty() {
            return Err(Status::invalid_argument(format!(
                "invalid label selector: key cannot be empty in '{pair}'"
            )));
        }

        // Validate key and value using the Kubernetes-compliant validators
        validate_label_key(key)?;
        validate_label_value(value)?;
    }

    Ok(())
}

// ---------------------------------------------------------------------------
// Object metadata validation