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/*
* This file is licensed under the Affero General Public License (AGPL) version 3.
*
* Copyright (C) 2024 New Vector, Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* See the GNU Affero General Public License for more details:
* <https://www.gnu.org/licenses/agpl-3.0.html>.
*/
//! # Matrix Identifiers
//!
//! This module contains definitions and utilities for working with matrix identifiers.
use std::{fmt, ops::Deref};
/// Errors that can occur when parsing a matrix identifier.
#[derive(Clone, Debug, PartialEq)]
pub enum IdentifierError {
IncorrectSigil,
MissingColon,
}
impl fmt::Display for IdentifierError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{:?}", self)
}
}
/// A Matrix user_id.
#[derive(Clone, Debug, PartialEq)]
pub struct UserID(String);
impl UserID {
/// Returns the `localpart` of the user_id.
pub fn localpart(&self) -> &str {
&self[1..self.colon_pos()]
}
/// Returns the `server_name` / `domain` of the user_id.
pub fn server_name(&self) -> &str {
&self[self.colon_pos() + 1..]
}
/// Returns the position of the ':' inside of the user_id.
/// Used when splitting the user_id into it's respective parts.
fn colon_pos(&self) -> usize {
self.find(':').unwrap()
}
}
impl TryFrom<&str> for UserID {
type Error = IdentifierError;
/// Will try creating a `UserID` from the provided `&str`.
/// Can fail if the user_id is incorrectly formatted.
fn try_from(s: &str) -> Result<Self, Self::Error> {
if !s.starts_with('@') {
return Err(IdentifierError::IncorrectSigil);
}
if s.find(':').is_none() {
return Err(IdentifierError::MissingColon);
}
Ok(UserID(s.to_string()))
}
}
impl Deref for UserID {
type Target = str;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl fmt::Display for UserID {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.0)
}
}
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