euv-ui 0.34.0

use super::*;

/// A notification stack pinned to the top right of the viewport.
///
/// The component is purely presentational: it renders the notifications it
/// is given and reports the clicks through the item callbacks. It owns no
/// queue and starts no timers, so the auto-dismiss timing stays with the
/// caller — `use_timer` or `App::use_interval` — and the rendered tree
/// stays deterministic and testable. The stack container is always
/// mounted, even when `items` is empty, so a caller can push notifications
/// in without remounting the component.
///
/// # Arguments
///
/// - `VirtualNode<EuvNotificationProps>` - The props node containing the notifications.
///
/// # Returns
///
/// - `VirtualNode` - The notification stack virtual DOM tree.
#[component]
pub fn euv_notification(node: VirtualNode<EuvNotificationProps>) -> VirtualNode {
    let EuvNotificationProps { items }: EuvNotificationProps =
        node.try_get_props().unwrap_or_default();
    let notifications: Vec<VirtualNode> = items
        .into_iter()
        .enumerate()
        .map(
            |(index, item): (usize, notification::view::r#struct::EuvNotificationItem)| {
                euv_notification_item(index, item)
            },
        )
        .collect();
    html! {
        div {
            class: c_euv_notification_stack()
            notifications
        }
    }
}

/// Renders one notification: its body and the optional close button.
///
/// # Arguments
///
/// - `usize` - The index of the notification in the stack, used as the diff key.
/// - `EuvNotificationItem` - The notification to render, consumed.
///
/// # Returns
///
/// - `VirtualNode` - The notification virtual DOM tree.
fn euv_notification_item(index: usize, item: EuvNotificationItem) -> VirtualNode {
    let EuvNotificationItem {
        title,
        text,
        on_close,
        dismissible,
    }: EuvNotificationItem = item;
    let is_dismissible: bool = dismissible || on_close.is_some();
    let close_handler: Option<Rc<dyn Fn(Event)>> = notification_callback_handler(on_close);
    html! {
        div {
            key: index.to_string()
            class: c_euv_notification()
            div {
                class: c_euv_notification_body()
                div {
                    class: c_euv_notification_title()
                    title
                }
                div {
                    class: c_euv_notification_text()
                    text
                }
            }
            if is_dismissible {
                button {
                    class: c_euv_notification_close()
                    onclick: close_handler
                    "×"
                }
            }
        }
    }
}

/// Builds the click handler that fires a caller's notification callback.
///
/// The event type is a parameter so the DOM-free test suite can drive the
/// handler with a stand-in event; the component always instantiates it
/// with [`Event`].
///
/// # Arguments
///
/// - `Option<Rc<dyn Fn()>>` - The callback fired by the handler.
///
/// # Returns
///
/// - `Option<Rc<dyn Fn(E)>>` - The click handler, or `None` when there is no callback.
pub fn notification_callback_handler<E: 'static>(
    callback: Option<Rc<dyn Fn()>>,
) -> Option<Rc<dyn Fn(E)>> {
    callback.map(|handler: Rc<dyn Fn()>| -> Rc<dyn Fn(E)> {
        Rc::new(move |_: E| {
            handler();
        })
    })
}