add umbrella crate

captcha/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "viendesu-captcha"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+eva.workspace = true
+viendesu-core.workspace = true

captcha/src/error.rs

@@ -0,0 +1,22 @@
+use eva::str::ToCompactString as _;
+
+use viendesu_core::{
+    errors::{Aux, Generic},
+    mk_error,
+};
+
+pub type CaptchaResult<T> = Result<T, CaptchaError>;
+
+mk_error!(CaptchaError);
+
+impl From<CaptchaError> for Aux {
+    fn from(value: CaptchaError) -> Self {
+        Self::Captcha(value.0.to_compact_string())
+    }
+}
+
+impl<S> From<CaptchaError> for Generic<S> {
+    fn from(value: CaptchaError) -> Self {
+        Self::Aux(value.into())
+    }
+}

captcha/src/lib.rs

@@ -0,0 +1,32 @@
+use eva::fut::Fut;
+
+use viendesu_core::{
+    bail,
+    types::captcha::Token,
+    world::{World, WorldMut},
+};
+
+use self::error::CaptchaResult;
+
+pub mod error;
+
+pub trait Service: Send + Sync {
+    fn verify<W: WorldMut>(
+        &self,
+        w: World<W>,
+        token: &Token,
+    ) -> impl Fut<Output = CaptchaResult<()>>;
+}
+
+impl Service for bool {
+    async fn verify<W: WorldMut>(&self, w: World<W>, token: &Token) -> CaptchaResult<()> {
+        _ = w;
+        _ = token;
+
+        if *self {
+            Ok(())
+        } else {
+            bail!("invalid captcha")
+        }
+    }
+}