Add messsage_l10n

serde_valid/README.md

@@ -176,6 +176,10 @@ assert_eq!(
 
 You can also use [fluent](https://projectfluent.org/) localization by using `fluent` feature.
 
+Allow the following attributes:
+- `#[validate(..., fluent("message-id", key1 = value1, ...))]`
+- `#[validate(..., message_l10n = fluent("message-id", key1 = value1, ...))]`
+
 ```rust
 use unic_langid::LanguageIdentifier;
 use serde_json::json;

serde_valid/src/lib.rs

@@ -176,6 +176,10 @@
 //!
 //! You can also use [fluent](https://projectfluent.org/) localization by using `fluent` feature.
 //!
+//! Allow the following attributes:
+//! - `#[validate(..., fluent("message-id", key1 = value1, ...))]`
+//! - `#[validate(..., message_l10n = fluent("message-id", key1 = value1, ...))]`
+//!
 //! ```rust
 //! # #[cfg(feature = "fluent")] {
 //! # use fluent::{FluentBundle, FluentResource};

serde_valid/tests/message_l10n_fluent_test.rs

@@ -0,0 +1,54 @@
+#[cfg(feature = "fluent")]
+mod tests {
+    use fluent::{FluentBundle, FluentResource};
+    use serde::Deserialize;
+    use serde_json::json;
+    use serde_valid::{fluent::Localize, Validate};
+    use unic_langid::LanguageIdentifier;
+
+    fn get_bundle(source: impl Into<String>) -> FluentBundle<FluentResource> {
+        let res = FluentResource::try_new(source.into()).expect("Failed to parse an FTL string.");
+
+        let langid_en: LanguageIdentifier = "en-US".parse().expect("Parsing failed");
+        let mut bundle = FluentBundle::new(vec![langid_en]);
+        bundle.add_resource(res).unwrap();
+
+        bundle
+    }
+
+    #[test]
+    fn fluent_error() {
+        #[derive(Debug, Deserialize, Validate)]
+        struct Test {
+            #[validate(minimum = 5, message_l10n = fluent("hello-world"))]
+            a: u32,
+            #[validate(maximum = 10, message_l10n = fluent("intro", name = "taro"))]
+            b: u32,
+        }
+
+        let test = Test { a: 1, b: 11 };
+        let a = test.validate().unwrap_err().localize(&get_bundle(
+            ["hello-world = Hello, world!", "intro = Welcome, { $name }."].join("\n"),
+        ));
+
+        assert_eq!(
+            a.to_string(),
+            json!({
+                "errors": [],
+                "properties": {
+                    "a": {
+                        "errors": [
+                            "Hello, world!"
+                        ]
+                    },
+                    "b": {
+                        "errors": [
+                            "Welcome, \u{2068}taro\u{2069}."
+                        ]
+                    }
+                }
+            })
+            .to_string()
+        );
+    }
+}

serde_valid_derive/src/attribute.rs

@@ -145,9 +145,19 @@ enum_str! {
     }
 }
 
+#[cfg(not(feature = "fluent"))]
+enum_str! {
+    pub enum MetaNameValueCustomMessage {
+        Message = "message",
+        MessageFn = "message_fn",
+    }
+}
+
+#[cfg(feature = "fluent")]
 enum_str! {
     pub enum MetaNameValueCustomMessage {
         Message = "message",
         MessageFn = "message_fn",
+        MessageL10n = "message_l10n",
     }
 }

serde_valid_derive/src/attribute/common/message_format.rs

@@ -84,7 +84,7 @@ fn extract_custom_message_format_from_meta_list(
             }),
         #[cfg(feature = "fluent")]
         message_type @ (MetaListCustomMessage::I18n | MetaListCustomMessage::Fluent) => {
-            get_fluent_message(message_type, path, &message_fn_define)
+            get_fluent_message_from_meta(message_type, path, &message_fn_define)
         }
     }
 }
@@ -96,6 +96,11 @@ fn extract_custom_message_format_from_name_value(
     match custom_message_type {
         MetaNameValueCustomMessage::Message => get_message(&name_value.value),
         MetaNameValueCustomMessage::MessageFn => get_message_fn_from_meta_name_value(name_value),
+        #[cfg(feature = "fluent")]
+        MetaNameValueCustomMessage::MessageL10n => match &name_value.value {
+            syn::Expr::Call(call) => get_fluent_message_from_call_expr(call),
+            _ => Err(vec![crate::Error::l10n_need_fn_call(&name_value.value)]),
+        },
     }
 }
 
@@ -151,7 +156,7 @@ fn get_message(expr: &syn::Expr) -> Result<WithWarnings<MessageFormat>, crate::E
 }
 
 #[cfg(feature = "fluent")]
-fn get_fluent_message(
+fn get_fluent_message_from_meta(
     message_type: &MetaListCustomMessage,
     path: &syn::Path,
     fn_define: &CommaSeparatedNestedMetas,
@@ -210,6 +215,54 @@ fn get_fluent_message(
     }
 }
 
+#[cfg(feature = "fluent")]
+fn get_fluent_message_from_call_expr(
+    fn_define: &syn::ExprCall,
+) -> Result<WithWarnings<MessageFormat>, crate::Errors> {
+    use quote::ToTokens;
+
+    if fn_define.func.to_token_stream().to_string() != "fluent" {
+        Err(vec![crate::Error::l10n_fn_name_not_allow(&fn_define.func)])?
+    };
+
+    let mut fn_args = fn_define.args.iter();
+    let fluent_id = match fn_args.next() {
+        Some(syn::Expr::Lit(syn::ExprLit {
+            lit: syn::Lit::Str(fluent_id),
+            ..
+        })) => fluent_id,
+        Some(expr) => Err(vec![crate::Error::fluent_id_must_be_str_lit(expr)])?,
+        None => Err(vec![crate::Error::fluent_id_not_found(
+            &fn_define.paren_token,
+        )])?,
+    };
+
+    let mut errors = vec![];
+    let fluent_args = TokenStream::from_iter(fn_args.filter_map(|arg| {
+        if let syn::Expr::Assign(assign) = arg {
+            let key = &assign.left.to_token_stream().to_string();
+            let value = &assign.right;
+            Some(quote!((#key, ::serde_valid::export::fluent::FluentValue::from(#value))))
+        } else {
+            errors.push(crate::Error::fluent_allow_arg(arg));
+            None
+        }
+    }));
+
+    if errors.is_empty() {
+        Ok(WithWarnings::new(quote!(
+            ::serde_valid::validation::error::Format::Fluent(
+                ::serde_valid::fluent::Message{
+                    id: #fluent_id,
+                    args: vec![#fluent_args]
+                }
+            )
+        )))
+    } else {
+        Err(errors)
+    }
+}
+
 #[cfg(feature = "fluent")]
 fn get_fluent_id(nested_meta: &NestedMeta) -> Option<&syn::LitStr> {
     match nested_meta {

serde_valid_derive/src/error.rs

@@ -348,6 +348,8 @@ impl Error {
         let candidates = &(MetaPathCustomMessage::iter().map(|x| x.name()))
             .chain(MetaListCustomMessage::iter().map(|x| x.name()))
             .chain(MetaNameValueCustomMessage::iter().map(|x| x.name()))
+            .unique()
+            .sorted()
             .collect::<Vec<_>>();
 
         let filterd_candidates =
@@ -471,6 +473,47 @@ impl Error {
         )
     }
 
+    #[cfg(feature = "fluent")]
+    pub fn l10n_need_fn_call(expr: &syn::Expr) -> Self {
+        Self::new(
+            expr.span(),
+            "#[validate(..., message_l10n = ???)] needs fn calling.".to_string(),
+        )
+    }
+
+    #[cfg(feature = "fluent")]
+    pub fn l10n_fn_name_not_allow(fn_name: &syn::Expr) -> Self {
+        Self::new(
+            fn_name.span(),
+            "#[validate(..., message_l10n = ???(...))] allows only \"fluent\".".to_string(),
+        )
+    }
+
+    #[cfg(feature = "fluent")]
+    pub fn fluent_id_must_be_str_lit(expr: &syn::Expr) -> Self {
+        Self::new(
+            expr.span(),
+            "#[validate(..., message_l10n = fluent(???, ...))] allow only string literal of the fluent id.",
+        )
+    }
+
+    #[cfg(feature = "fluent")]
+    pub fn fluent_id_not_found(paren: &syn::token::Paren) -> Self {
+        Self::new(
+            paren.span.span(),
+            "#[validate(..., message_l10n = fluent(???))] need the fluent id.",
+        )
+    }
+
+    #[cfg(feature = "fluent")]
+    pub fn fluent_allow_arg(expr: &syn::Expr) -> Self {
+        Self::new(
+            expr.span(),
+            "#[validate(..., message_l10n = fluent(..., ???))] allows only \"key=value\" of the fluent arg."
+                .to_string(),
+        )
+    }
+
     pub fn literal_only(span: impl Spanned) -> Self {
         Self::new(span.span(), "Allow literal only.")
     }