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//! Error module for `tor-dirserver`
//!
//! TODO DIRMIRROR: The way on how we structure errors needs further discussion.
#[allow(unused_imports)]
use deadpool::managed::Pool;
#[allow(unused_imports)]
use std::sync::PoisonError;
use thiserror::Error;
/// An error while building a builder struct to the target structure.
#[derive(Debug, Error)]
#[non_exhaustive]
pub enum BuilderError {
/// Some builders have mandatory fields (i.e. fields that must be set before
/// calling `.build()`). In those cases, we need to yield a semantic error.
#[error("missing field: {0}")]
MissingField(&'static str),
}
/// An error while interacting with the database.
#[derive(Debug, Error)]
#[non_exhaustive]
pub(crate) enum DatabaseError {
/// A low-level SQLite error, independent of deadpool, has occurred, which
/// can have a basically infinite amount of reasons, all of them outlined in
/// the actual SQLite and rusqlite documentations.
#[error("low-level rusqlite error: {0}")]
LowLevel(#[from] rusqlite::Error),
/// This is an application level error meaning that the database can be
/// successfully accessed but its content implies it is of a schema version
/// we do not support.
///
/// Keep in mind that an unrecognized schema is not equal to no schema.
/// In the latter case we actually initialize the database, whereas in the
/// previous one, we fail early in order to not corrupt an existing database.
/// Future versions of this crate should continue with this promise in order
/// to ensure forward compatability.
#[error("unrecognized schema version: {0}")]
IncompatibleSchema(String),
}
/// An error related around the HTTP protocol.
#[derive(Debug, Error)]
#[non_exhaustive]
pub(crate) enum HttpError {
/// The `Content-Encoding` and/or `Accept-Encoding` header are (partially)
/// invalid.
#[error("invalid encoding: {0}")]
InvalidEncoding(String),
}
/// An error related around the StoreCache.
#[derive(Debug, Error)]
#[non_exhaustive]
pub(crate) enum StoreCacheError {
/// An interaction with the database failed.
#[error("database error: {0}")]
Database(#[from] DatabaseError),
/// An underlying programming problem.
#[error("internal problem")]
Bug(#[from] tor_error::Bug),
}
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