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|
use rustc_error_messages::{
fluent_bundle::resolver::errors::{ReferenceKind, ResolverError},
FluentArgs, FluentError,
};
use std::borrow::Cow;
use std::error::Error;
use std::fmt;
#[derive(Debug)]
pub enum TranslateError<'args> {
One {
id: &'args Cow<'args, str>,
args: &'args FluentArgs<'args>,
kind: TranslateErrorKind<'args>,
},
Two {
primary: Box<TranslateError<'args>>,
fallback: Box<TranslateError<'args>>,
},
}
impl<'args> TranslateError<'args> {
pub fn message(id: &'args Cow<'args, str>, args: &'args FluentArgs<'args>) -> Self {
Self::One { id, args, kind: TranslateErrorKind::MessageMissing }
}
pub fn primary(id: &'args Cow<'args, str>, args: &'args FluentArgs<'args>) -> Self {
Self::One { id, args, kind: TranslateErrorKind::PrimaryBundleMissing }
}
pub fn attribute(
id: &'args Cow<'args, str>,
args: &'args FluentArgs<'args>,
attr: &'args str,
) -> Self {
Self::One { id, args, kind: TranslateErrorKind::AttributeMissing { attr } }
}
pub fn value(id: &'args Cow<'args, str>, args: &'args FluentArgs<'args>) -> Self {
Self::One { id, args, kind: TranslateErrorKind::ValueMissing }
}
pub fn fluent(
id: &'args Cow<'args, str>,
args: &'args FluentArgs<'args>,
errs: Vec<FluentError>,
) -> Self {
Self::One { id, args, kind: TranslateErrorKind::Fluent { errs } }
}
pub fn and(self, fallback: TranslateError<'args>) -> TranslateError<'args> {
Self::Two { primary: Box::new(self), fallback: Box::new(fallback) }
}
}
#[derive(Debug)]
pub enum TranslateErrorKind<'args> {
MessageMissing,
PrimaryBundleMissing,
AttributeMissing { attr: &'args str },
ValueMissing,
Fluent { errs: Vec<FluentError> },
}
impl fmt::Display for TranslateError<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
use TranslateErrorKind::*;
match self {
Self::One { id, args, kind } => {
writeln!(f, "failed while formatting fluent string `{id}`: ")?;
match kind {
MessageMissing => writeln!(f, "message was missing")?,
PrimaryBundleMissing => writeln!(f, "the primary bundle was missing")?,
AttributeMissing { attr } => {
writeln!(f, "the attribute `{attr}` was missing")?;
writeln!(f, "help: add `.{attr} = <message>`")?;
}
ValueMissing => writeln!(f, "the value was missing")?,
Fluent { errs } => {
for err in errs {
match err {
FluentError::ResolverError(ResolverError::Reference(
ReferenceKind::Message { id, .. }
| ReferenceKind::Variable { id, .. },
)) => {
if args.iter().any(|(arg_id, _)| arg_id == id) {
writeln!(
f,
"argument `{id}` exists but was not referenced correctly"
)?;
writeln!(f, "help: try using `{{${id}}}` instead")?;
} else {
writeln!(
f,
"the fluent string has an argument `{id}` that was not found."
)?;
let vars: Vec<&str> =
args.iter().map(|(a, _v)| a).collect();
match &*vars {
[] => writeln!(f, "help: no arguments are available")?,
[one] => writeln!(
f,
"help: the argument `{one}` is available"
)?,
[first, middle @ .., last] => {
write!(f, "help: the arguments `{first}`")?;
for a in middle {
write!(f, ", `{a}`")?;
}
writeln!(f, " and `{last}` are available")?;
}
}
}
}
_ => writeln!(f, "{err}")?,
}
}
}
}
}
// If someone cares about primary bundles, they'll probably notice it's missing
// regardless or will be using `debug_assertions`
// so we skip the arm below this one to avoid confusing the regular user.
Self::Two { primary: box Self::One { kind: PrimaryBundleMissing, .. }, fallback } => {
fmt::Display::fmt(fallback, f)?;
}
Self::Two { primary, fallback } => {
writeln!(
f,
"first, fluent formatting using the primary bundle failed:\n {primary}\n \
while attempting to recover by using the fallback bundle instead, another error occurred:\n{fallback}"
)?;
}
}
Ok(())
}
}
impl Error for TranslateError<'_> {}
|
