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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use std::{error, fmt, result, str::Utf8Error, sync::PoisonError};
use nserror::{
nsresult, NS_ERROR_ALREADY_INITIALIZED, NS_ERROR_FAILURE, NS_ERROR_INVALID_ARG,
NS_ERROR_NOT_AVAILABLE, NS_ERROR_UNEXPECTED,
};
pub type Result<T> = result::Result<T, Error>;
#[derive(Debug)]
pub enum Error {
/// A wrapped FxA error.
FxAError(fxa_client::Error),
/// A wrapped XPCOM error.
Nsresult(nsresult),
/// A punt already ran.
AlreadyRan(&'static str),
/// A punt didn't run on the background task queue.
DidNotRun(&'static str),
/// A punt was already torn down when used.
AlreadyTornDown,
/// A Gecko string couldn't be converted to UTF-8.
MalformedString(Box<dyn error::Error + Send + Sync + 'static>),
/// The FxA object has already been initialized.
AlreadyInitialized,
/// The FxA object has not been initialized before use.
Unavailable,
/// Failure acquiring a lock on the FxA object in the background thread.
PoisonError,
}
impl error::Error for Error {
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
match self {
Error::MalformedString(error) => Some(error.as_ref()),
_ => None,
}
}
}
impl From<Error> for nsresult {
fn from(error: Error) -> nsresult {
match error {
Error::FxAError(_) => NS_ERROR_FAILURE,
Error::AlreadyRan(_)
| Error::DidNotRun(_)
| Error::AlreadyTornDown
| Error::PoisonError => NS_ERROR_UNEXPECTED,
Error::Nsresult(result) => result,
Error::MalformedString(_) => NS_ERROR_INVALID_ARG,
Error::AlreadyInitialized => NS_ERROR_ALREADY_INITIALIZED,
Error::Unavailable => NS_ERROR_NOT_AVAILABLE,
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
Error::FxAError(error) => error.fmt(f),
Error::Nsresult(result) => write!(f, "Operation failed with {}", result.error_name()),
Error::AlreadyRan(what) => write!(f, "`{}` already ran on the background thread", what),
Error::DidNotRun(what) => write!(f, "Failed to run `{}` on background thread", what),
Error::AlreadyTornDown => {
write!(f, "Can't use a storage area that's already torn down")
}
Error::MalformedString(error) => error.fmt(f),
Error::AlreadyInitialized => f.write_str("The resource has already been initialized"),
Error::Unavailable => f.write_str("A resource for this operation is unavailable"),
Error::PoisonError => f.write_str("Error getting read/write lock"),
}
}
}
impl From<nsresult> for Error {
fn from(result: nsresult) -> Error {
Error::Nsresult(result)
}
}
impl From<Utf8Error> for Error {
fn from(error: Utf8Error) -> Error {
Error::MalformedString(error.into())
}
}
impl<T> From<PoisonError<T>> for Error {
fn from(_error: PoisonError<T>) -> Error {
Error::PoisonError
}
}
impl From<fxa_client::error::Error> for Error {
fn from(result: fxa_client::error::Error) -> Error {
Error::FxAError(result)
}
}
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