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/// Update availability state.
///
/// `hint` defaults to `""` via `#[derive(Default)]`. In practice `App::new()`
/// always overwrites it with the detected install method, so the empty default
/// is only visible when constructing `UpdateState` in isolation (e.g. tests).
#[derive(Default)]
pub struct UpdateState {
/// Available version string (None if up to date or unchecked).
pub(in crate::app) available: Option<String>,
/// Update announcement headline.
pub(in crate::app) headline: Option<String>,
/// Update hint string (install command suggestion).
pub(in crate::app) hint: &'static str,
}
impl UpdateState {
/// Construct with the current install-method hint detected at runtime.
pub fn with_current_hint(env: &crate::runtime::env::Env) -> Self {
Self {
hint: crate::update::update_hint(env),
..Self::default()
}
}
pub fn available(&self) -> Option<&String> {
self.available.as_ref()
}
pub fn headline(&self) -> Option<&str> {
self.headline.as_deref()
}
pub fn hint(&self) -> &'static str {
self.hint
}
pub fn announce(&mut self, version: String, headline: Option<String>) {
self.available = Some(version);
self.headline = headline;
}
}