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use crate::SharedString;
/// The query order.
#[derive(Debug, Clone)]
pub struct QueryOrder {
/// The sort field.
field: SharedString,
/// The sort order.
descending: bool,
/// Whether the nulls appear first or last.
nulls_first: Option<bool>,
}
impl QueryOrder {
/// Creates a new instance.
#[inline]
pub fn new(field: impl Into<SharedString>, descending: bool) -> Self {
Self {
field: field.into(),
descending,
nulls_first: None,
}
}
/// Sets the nulls first.
#[inline]
pub fn set_nulls_first(&mut self) {
self.nulls_first = Some(true);
}
/// Sets the nulls last.
#[inline]
pub fn set_nulls_last(&mut self) {
self.nulls_first = Some(false);
}
/// Returns the sort field.
#[inline]
pub fn field(&self) -> &str {
self.field.as_ref()
}
/// Returns `true` if the sort order is ascending.
#[inline]
pub fn is_ascending(&self) -> bool {
!self.descending
}
/// Returns `true` if the sort order is descending.
#[inline]
pub fn is_descending(&self) -> bool {
self.descending
}
/// Returns `true` if the nulls appear first.
#[inline]
pub fn nulls_first(&self) -> bool {
self.nulls_first.is_some_and(|b| b)
}
/// Returns `true` if the nulls appear last.
#[inline]
pub fn nulls_last(&self) -> bool {
self.nulls_first.is_some_and(|b| !b)
}
}