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//! Scope configurator for a binding for types inside of a [`DIContainer`].
use std::marker::PhantomData;
use crate::di_container::blocking::binding::when_configurator::BindingWhenConfigurator;
use crate::di_container::BindingOptions;
use crate::errors::di_container::BindingScopeConfiguratorError;
use crate::interfaces::injectable::Injectable;
use crate::provider::blocking::{SingletonProvider, TransientTypeProvider};
use crate::ptr::SingletonPtr;
use crate::util::use_double;
use_double!(crate::dependency_history::DependencyHistory);
use_double!(crate::di_container::blocking::DIContainer);
/// Scope configurator for a binding for type `Interface` inside a [`DIContainer`].
pub struct BindingScopeConfigurator<'di_container, Interface, Implementation>
where
Interface: 'static + ?Sized,
Implementation: Injectable<DIContainer>,
{
di_container: &'di_container DIContainer,
dependency_history_factory: fn() -> DependencyHistory,
interface_phantom: PhantomData<Interface>,
implementation_phantom: PhantomData<Implementation>,
}
impl<'di_container, Interface, Implementation>
BindingScopeConfigurator<'di_container, Interface, Implementation>
where
Interface: 'static + ?Sized,
Implementation: Injectable<DIContainer>,
{
pub(crate) fn new(
di_container: &'di_container DIContainer,
dependency_history_factory: fn() -> DependencyHistory,
) -> Self
{
Self {
di_container,
dependency_history_factory,
interface_phantom: PhantomData,
implementation_phantom: PhantomData,
}
}
/// Configures the binding to be in a transient scope.
///
/// This is the default.
///
/// # Examples
/// ```
/// # use syrette::{DIContainer, injectable};
/// #
/// # struct Authenticator {}
/// #
/// # #[injectable]
/// # impl Authenticator
/// # {
/// # fn new() -> Self
/// # {
/// # Self {}
/// # }
/// # }
/// #
/// # fn main() -> Result<(), Box<dyn std::error::Error>> {
/// let mut di_container = DIContainer::new();
///
/// di_container
/// .bind::<Authenticator>()
/// .to::<Authenticator>()?
/// .in_transient_scope();
/// #
/// # Ok(())
/// # }
/// ```
#[allow(clippy::must_use_candidate)]
pub fn in_transient_scope(self) -> BindingWhenConfigurator<'di_container, Interface>
{
self.set_in_transient_scope();
BindingWhenConfigurator::new(self.di_container)
}
/// Configures the binding to be in a singleton scope.
///
/// # Errors
/// Will return Err if resolving the implementation fails.
///
/// # Examples
/// ```
/// # use std::sync::atomic::{AtomicBool, Ordering};
/// # use syrette::{DIContainer, injectable};
/// #
/// # struct AudioManager
/// # {
/// # is_sound_playing: AtomicBool
/// # }
/// #
/// # #[injectable]
/// # impl AudioManager
/// # {
/// # fn new() -> Self
/// # {
/// # Self { is_sound_playing: AtomicBool::new(false) }
/// # }
/// #
/// # fn play_long_sound(&self)
/// # {
/// # self.is_sound_playing.store(true, Ordering::Relaxed);
/// # }
/// #
/// # fn is_sound_playing(&self) -> bool
/// # {
/// # self.is_sound_playing.load(Ordering::Relaxed)
/// # }
/// #
/// # }
/// #
/// # fn main() -> Result<(), Box<dyn std::error::Error>> {
/// let mut di_container = DIContainer::new();
///
/// di_container
/// .bind::<AudioManager>()
/// .to::<AudioManager>()?
/// .in_singleton_scope();
///
/// {
/// let audio_manager = di_container.get::<AudioManager>()?.singleton()?;
///
/// audio_manager.play_long_sound();
/// }
///
/// let audio_manager = di_container.get::<AudioManager>()?.singleton()?;
///
/// assert!(audio_manager.is_sound_playing());
/// #
/// # Ok(())
/// # }
/// ```
pub fn in_singleton_scope(
self,
) -> Result<
BindingWhenConfigurator<'di_container, Interface>,
BindingScopeConfiguratorError,
>
{
let singleton: SingletonPtr<Implementation> = SingletonPtr::from(
Implementation::resolve(
self.di_container,
(self.dependency_history_factory)(),
)
.map_err(BindingScopeConfiguratorError::SingletonResolveFailed)?,
);
self.di_container.set_binding::<Interface>(
BindingOptions::new(),
Box::new(SingletonProvider::new(singleton)),
);
Ok(BindingWhenConfigurator::new(self.di_container))
}
pub(crate) fn set_in_transient_scope(&self)
{
self.di_container.set_binding::<Interface>(
BindingOptions::new(),
Box::new(TransientTypeProvider::<Implementation, DIContainer>::new()),
);
}
}
#[cfg(test)]
mod tests
{
use super::*;
use crate::dependency_history::MockDependencyHistory;
use crate::di_container::blocking::MockDIContainer;
use crate::test_utils::subjects;
#[test]
fn in_transient_scope_works()
{
let mut di_container_mock = MockDIContainer::new();
di_container_mock
.expect_set_binding::<dyn subjects::IUserManager>()
.withf(|options, _provider| options.name.is_none())
.return_once(|_name, _provider| ())
.once();
let binding_scope_configurator = BindingScopeConfigurator::<
dyn subjects::IUserManager,
subjects::UserManager,
>::new(
&di_container_mock, MockDependencyHistory::new
);
binding_scope_configurator.in_transient_scope();
}
#[test]
fn in_singleton_scope_works()
{
let mut di_container_mock = MockDIContainer::new();
di_container_mock
.expect_set_binding::<dyn subjects::IUserManager>()
.withf(|options, _provider| options.name.is_none())
.return_once(|_name, _provider| ())
.once();
let binding_scope_configurator = BindingScopeConfigurator::<
dyn subjects::IUserManager,
subjects::UserManager,
>::new(
&di_container_mock, MockDependencyHistory::new
);
assert!(binding_scope_configurator.in_singleton_scope().is_ok());
}
}
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