kkv 1.2.1

A Peer-to-Peer Decentralized, Temporary and Anonymous Message System.
Documentation 
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/**************************************************************************
 *   src/axum.rs  --  This file is part of kkv.                           *
 *                                                                        *
 *   Copyright (C) 2025 Mateo Lafalce                                     *
 *                                                                        *
 *   kkv is free software: you can redistribute it and/or modify          *
 *   it under the terms of the GNU General Public License as published    *
 *   by the Free Software Foundation, either version 3 of the License,    *
 *   or (at your option) any later version.                               *
 *                                                                        *
 *   kkv is distributed in the hope that it will be useful,               *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty          *
 *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.              *
 *   See the GNU General Public License for more details.                 *
 *                                                                        *
 *   You should have received a copy of the GNU General Public License    *
 *   along with this program.  If not, see http://www.gnu.org/licenses/.  *
 *                                                                        *
 **************************************************************************/

use axum::{
    extract::{rejection::FormRejection, FromRequest, Request},
    http::StatusCode,
    response::{IntoResponse, Response},
    Form,
};
use serde::de::DeserializeOwned;
use thiserror::Error;
use validator::Validate;

/// Validated form for HTTP request
#[derive(Debug, Clone, Copy, Default)]
pub struct ValidatedForm<T>(pub T);

impl<T, S> FromRequest<S> for ValidatedForm<T>
where
    T: DeserializeOwned + Validate,
    S: Send + Sync,
    Form<T>: FromRequest<S, Rejection = FormRejection>,
{
    type Rejection = ServerError;

    async fn from_request(req: Request, state: &S) -> Result<Self, Self::Rejection> {
        let Form(value) = Form::<T>::from_request(req, state).await?;
        value.validate()?;
        Ok(ValidatedForm(value))
    }
}

/// Error enums
#[derive(Debug, Error)]
pub enum ServerError {
    #[error(transparent)]
    ValidationError(#[from] validator::ValidationErrors),

    #[error(transparent)]
    AxumFormRejection(#[from] FormRejection),
}

impl IntoResponse for ServerError {
    fn into_response(self) -> Response {
        match self {
            ServerError::ValidationError(_) => {
                let message = format!("Input validation error: [{:?}]", self).replace('\n', ", ");
                (StatusCode::BAD_REQUEST, message)
            }
            ServerError::AxumFormRejection(_) => (StatusCode::BAD_REQUEST, self.to_string()),
        }
        .into_response()
    }
}