93 lines
3.5 KiB
Rust
93 lines
3.5 KiB
Rust
//! Tools for registering users & persisting arbitrary user data
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//!
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//! Many Gemini applications use some form of a login method in order to allow users to
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//! persist personal data, authenticate themselves, and login from multiple devices using
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//! multiple certificates.
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//!
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//! This module contains tools to help you build a system like this without stress. A
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//! typical workflow looks something like this:
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//!
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//! * Call [`Request::user()`] to retrieve information about a user
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//! * Direct any users without a certificate to create a certificate
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//! * Ask users with a certificate not yet linked to an account to create an account using
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//! [`NotSignedInUser::register()`] or link their certificate to an existing account
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//! with a password using [`NotSignedInUser::attach()`].
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//! * You should now have a [`SignedInUser`] either from registering/attaching a
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//! [`NotSignedInUser`] or because the user was already registered
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//! * Access and modify user data using [`SignedInUser::as_mut()`], changes are
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//! automatically persisted to the database (on user drop).
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//!
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//! Use of this module requires the `user_management` feature to be enabled
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pub mod user;
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mod manager;
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pub use manager::UserManager;
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pub use user::User;
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pub use manager::CertificateData;
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#[derive(Debug)]
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pub enum UserManagerError {
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UsernameNotUnique,
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PasswordNotSet,
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DatabaseError(sled::Error),
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DatabaseTransactionError(sled::transaction::TransactionError),
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DeserializeError(bincode::Error),
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Argon2Error(argon2::Error),
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}
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impl From<sled::Error> for UserManagerError {
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fn from(error: sled::Error) -> Self {
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Self::DatabaseError(error)
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}
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}
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impl From<sled::transaction::TransactionError> for UserManagerError {
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fn from(error: sled::transaction::TransactionError) -> Self {
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Self::DatabaseTransactionError(error)
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}
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}
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impl From<bincode::Error> for UserManagerError {
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fn from(error: bincode::Error) -> Self {
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Self::DeserializeError(error)
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}
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}
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impl From<argon2::Error> for UserManagerError {
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fn from(error: argon2::Error) -> Self {
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Self::Argon2Error(error)
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}
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}
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impl std::error::Error for UserManagerError {
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fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
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match self {
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Self::DatabaseError(e) => Some(e),
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Self::DatabaseTransactionError(e) => Some(e),
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Self::DeserializeError(e) => Some(e),
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Self::Argon2Error(e) => Some(e),
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_ => None
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}
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}
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}
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impl std::fmt::Display for UserManagerError {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::result::Result<(), std::fmt::Error> {
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match self {
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Self::UsernameNotUnique =>
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write!(f, "Attempted to create a user using a username that's already been taken"),
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Self::PasswordNotSet =>
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write!(f, "Attempted to check the password of a user who has not set one yet"),
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Self::DatabaseError(e) =>
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write!(f, "Error accessing the user database: {}", e),
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Self::DatabaseTransactionError(e) =>
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write!(f, "Error accessing the user database: {}", e),
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Self::DeserializeError(e) =>
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write!(f, "Recieved messy data from database, possible corruption: {}", e),
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Self::Argon2Error(e) =>
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write!(f, "Argon2 Error, likely malformed password hash, possible database corruption: {}", e),
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}
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}
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}
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pub type Result<T> = std::result::Result<T, UserManagerError>;
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