ggen-api 5.1.0

REST API layer for ggen monetization: marketplace, billing, and SaaS operations
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//! API error types and handling

use axum::{
    http::StatusCode,
    response::{IntoResponse, Response},
    Json,
};
use serde_json::json;
use thiserror::Error;

#[derive(Error, Debug)]
pub enum ApiError {
    #[error("Unauthorized: {0}")]
    Unauthorized(String),

    #[error("Forbidden: {0}")]
    Forbidden(String),

    #[error("Not found: {0}")]
    NotFound(String),

    #[error("Bad request: {0}")]
    BadRequest(String),

    #[error("Conflict: {0}")]
    Conflict(String),

    #[error("Quota exceeded: {0}")]
    QuotaExceeded(String),

    #[error("Internal server error: {0}")]
    InternalError(String),

    #[error("Payment error: {0}")]
    PaymentError(String),

    #[error("Authentication failed: {0}")]
    AuthenticationFailed(String),
}

impl IntoResponse for ApiError {
    fn into_response(self) -> Response {
        let (status, error_message) = match self {
            ApiError::Unauthorized(msg) => (StatusCode::UNAUTHORIZED, msg),
            ApiError::Forbidden(msg) => (StatusCode::FORBIDDEN, msg),
            ApiError::NotFound(msg) => (StatusCode::NOT_FOUND, msg),
            ApiError::BadRequest(msg) => (StatusCode::BAD_REQUEST, msg),
            ApiError::Conflict(msg) => (StatusCode::CONFLICT, msg),
            ApiError::QuotaExceeded(msg) => (StatusCode::PAYMENT_REQUIRED, msg),
            ApiError::InternalError(msg) => (StatusCode::INTERNAL_SERVER_ERROR, msg),
            ApiError::PaymentError(msg) => (StatusCode::PAYMENT_REQUIRED, msg),
            ApiError::AuthenticationFailed(msg) => (StatusCode::UNAUTHORIZED, msg),
        };

        let body = Json(json!({
            "error": error_message,
            "status": status.as_u16(),
        }));

        (status, body).into_response()
    }
}

pub type ApiResult<T> = Result<T, ApiError>;