vertigo-forms 0.1.3

use vertigo::{
    AttrGroup, Computed, Value, bind, component, computed_tuple, dom, render::render_list,
};

/// Simple Select component based on map of `i64`->`T` values.
///
/// Example:
/// ```
/// use vertigo::{DomNode, dom, Value};
/// use vertigo_forms::DictSelect;
///
/// let value = Value::new(1);
/// let options = Value::new(
///     vec![
///         (1, "foo".to_string()),
///         (2, "bar".to_string()),
///         (3, "baz".to_string()),
///     ]
/// );
///
/// dom! {
///     <DictSelect
///         value={value.clone()}
///         options={options}
///     />
/// };
/// ```
#[component]
pub fn DictSelect<T: Clone + From<String> + PartialEq + ToString + 'static>(
    value: Value<i64>,
    options: Computed<Vec<(i64, T)>>,
    select: AttrGroup,
) {
    let on_change = bind!(value, |new_value: String| {
        value.set(new_value.parse().unwrap_or_default());
    });

    // Generate empty option only if initial value does not match any of provided options
    let empty = computed_tuple!(value, options).render_value_option(|(value, options)| {
        options
            .iter()
            .all(|(key, _)| key != &value)
            .then(|| dom! { <option value="" selected="selected" /> })
    });

    let list = bind!(
        options,
        value.render_value(move |value| render_list(
            &options,
            |(key, _)| key.to_string(),
            move |(key, item)| {
                let text_item = item.to_string();
                if key == &value {
                    dom! { <option value={&key} selected="selected">{text_item}</option> }
                } else {
                    dom! { <option value={&key}>{text_item}</option> }
                }
            }
        ))
    );

    dom! {
        <select {on_change} {..select}>
            {empty}
            {list}
        </select>
    }
}