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use crate::Trust;
impl Trust {
/// Derive `Full` trust if `path` is owned by the user executing the current process, or `Reduced` trust otherwise.
pub fn from_path_ownership(path: &std::path::Path) -> std::io::Result<Self> {
Ok(if crate::identity::is_path_owned_by_current_user(path)? {
Trust::Full
} else {
Trust::Reduced
})
}
}
/// A trait to help creating default values based on a trust level.
pub trait DefaultForLevel {
/// Produce a default value for the given trust `level`.
fn default_for_level(level: Trust) -> Self;
}
/// Associate instructions for how to deal with various `Trust` levels as they are encountered in the wild.
pub struct Mapping<T> {
/// The value for fully trusted resources.
pub full: T,
/// The value for resources with reduced trust.
pub reduced: T,
}
impl<T> Default for Mapping<T>
where
T: DefaultForLevel,
{
fn default() -> Self {
Mapping {
full: T::default_for_level(Trust::Full),
reduced: T::default_for_level(Trust::Reduced),
}
}
}
impl<T> Mapping<T> {
/// Obtain the value for the given trust `level`.
pub fn by_level(&self, level: Trust) -> &T {
match level {
Trust::Full => &self.full,
Trust::Reduced => &self.reduced,
}
}
/// Obtain the value for the given `level` once.
pub fn into_value_by_level(self, level: Trust) -> T {
match level {
Trust::Full => self.full,
Trust::Reduced => self.reduced,
}
}
}
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