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|
use mingling_picker_macros::internal_repeat;
use crate::{Pickable, PickerArg, PickerArgResult, PickerArgs};
internal_repeat!(1..=32 => {
#[doc(hidden)]
pub struct PickerPattern$<'a, (T$,+), Route>
where (T$: Pickable<'a>,+)
{
pub args: PickerArgs<'a>,
pub error_route: Option<Route>,
(
pub(crate) arg_$: &'a PickerArg<'a, T$>,
pub(crate) result_$: PickerArgResult<T$>,
pub(crate) default_$: Option<Box<dyn FnOnce() -> T$>>,
pub(crate) route_$: Option<Box<dyn FnOnce() -> Route>>,
pub(crate) post_$: Option<Box<dyn FnOnce(T$) -> T$>>,
+)
}
});
internal_repeat!(1..=32 => {
impl<'a, (T$,+), Route> PickerPattern$<'a, (T$,+), Route>
where (T$: Pickable<'a>,+)
{
/// Sets a default value provider for this arg.
///
/// If the arg is not provided by the user at runtime, the given closure will be
/// called to produce a default value. The closure is expected to return `T$`.
///
/// # Example
///
/// ```ignore
/// let pattern = picker
/// .pick(&my_arg)
/// .or(|| 42);
/// ```
#[allow(clippy::type_complexity)]
pub fn or<F>(mut self, func: F) -> Self
where
F: FnMut() -> T$,
F: 'static,
{
self.default_$ = Some(Box::new(func));
self
}
/// Uses the default value for this arg's type if the arg is not provided.
///
/// If the arg is not provided by the user at runtime, the default value for `T$`
/// (as defined by the `Default` trait) will be used.
///
/// # Example
///
/// ```ignore
/// let pattern = picker
/// .pick(&my_arg)
/// .or_default();
/// ```
#[allow(clippy::type_complexity)]
pub fn or_default(mut self) -> Self
where
T$: Default,
{
self.default_$ = Some(Box::new(|| T$::default()));
self
}
/// Sets a route for when the arg is not provided.
///
/// If the arg is not provided by the user at runtime, the given closure will be
/// called to produce a route value that will be returned early.
///
/// # Example
///
/// ```ignore
/// let pattern = picker
/// .pick(&my_arg)
/// .or_route(|| Redirect::home());
/// ```
pub fn or_route<F>(mut self, func: F) -> Self
where
F: FnMut() -> Route,
F: 'static,
{
self.route_$ = Some(Box::new(func));
self
}
/// Resets the route for this picker pattern, allowing a different route type.
///
/// This method converts the current `PickerPattern` into a new one with a different
/// route type `NewRoute`. All existing arg configurations, defaults, and post-
/// processing functions are preserved, but the `error_route` and individual
/// `route_$` fields are cleared (set to `None`).
///
/// This is useful when you want to change the error/redirect route type mid-chain,
/// for example when composing patterns from different contexts that use different
/// route enums.
#[allow(clippy::type_complexity)]
pub fn with_route<NewRoute>(self) -> PickerPattern$<'a, (T$,+), NewRoute>
{
PickerPattern$ {
args: self.args,
error_route: None,
(
arg_$: self.arg_$,
result_$: self.result_$,
default_$: self.default_$,
route_$: None,
post_$: self.post_$,
+)
}
}
/// Attaches a post-processing function to this arg.
///
/// After the arg's value is parsed (or defaulted), the given closure will be
/// invoked with the parsed value and its return value will be used as the final
/// result. This allows transforming or validating the parsed value.
///
/// # Example
///
/// ```ignore
/// let pattern = picker
/// .pick(&my_arg)
/// .post(|val| val * 2);
/// ```
#[allow(clippy::type_complexity)]
pub fn post<F>(mut self, func: F) -> Self
where
F: FnMut(T$) -> T$,
F: 'static,
{
self.post_$ = Some(Box::new(func));
self
}
}
});
internal_repeat!(1..32 => {
impl<'a, (T$,+), Route> PickerPattern$<'a, (T$,+), Route>
where (T$: Pickable<'a>,+)
{
#[allow(clippy::type_complexity)]
/// Adds a new arg to the picking chain, returning a new `PickerPattern` with one more type parameter.
///
/// This method extends the current picking pattern by appending an additional arg.
/// The previous args and their results are preserved as part of the new pattern.
/// The new arg's result is initially `Unparsed`.
pub fn pick<N>(self, arg: impl Into<&'a PickerArg<'a, N>>) -> PickerPattern$+<'a, (T$,+), N, Route>
where
N: Pickable<'a>,
{
PickerPattern$+ {
// Args
args: self.args,
error_route: self.error_route,
// Current
arg_$+: arg.into(),
result_$+: PickerArgResult::Unparsed,
default_$+: None,
route_$+: None,
post_$+: None,
// Prev
(
arg_$: self.arg_$,
result_$: self.result_$,
default_$: self.default_$,
route_$: self.route_$,
post_$: self.post_$,
+)
}
}
/// Picks a new arg with a default value provider in a single call.
///
/// This is a shorthand for calling `.pick(arg).or(func)`.
///
/// # Example
///
/// ```ignore
/// let pattern = picker
/// .pick_or(&my_arg, || 42);
/// ```
#[allow(clippy::type_complexity)]
pub fn pick_or<N, F>(self, arg: impl Into<&'a PickerArg<'a, N>>, func: F) -> PickerPattern$+<'a, (T$,+), N, Route>
where
N: Pickable<'a>,
F: FnMut() -> N + 'static,
F: 'static,
{
self.pick(arg).or(func)
}
/// Picks a new arg with a default value in a single call.
///
/// This is a shorthand for calling `.pick(arg).or_default()`.
///
/// # Example
///
/// ```ignore
/// let pattern = picker
/// .pick_or_default(&my_arg);
/// ```
#[allow(clippy::type_complexity)]
pub fn pick_or_default<N>(self, arg: impl Into<&'a PickerArg<'a, N>>) -> PickerPattern$+<'a, (T$,+), N, Route>
where
N: Pickable<'a> + Default,
{
self.pick(arg).or_default()
}
/// Picks a new arg with a route in a single call.
///
/// This is a shorthand for calling `.pick(arg).or_route(func)`.
///
/// # Example
///
/// ```ignore
/// let pattern = picker
/// .pick_or_route(&my_arg, || Redirect::home());
/// ```
#[allow(clippy::type_complexity)]
pub fn pick_or_route<N, F>(self, arg: impl Into<&'a PickerArg<'a, N>>, func: F) -> PickerPattern$+<'a, (T$,+), N, Route>
where
N: Pickable<'a>,
F: FnMut() -> Route + 'static,
F: 'static,
{
self.pick(arg).or_route(func)
}
}
});
|
