duckquill 0.2.5

Parquet-backed text2sql engine and CLI for schema-first querying workflows
Documentation 
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use std::string::FromUtf8Error;

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

pub type AppResult<T> = Result<T, AppError>;

#[derive(Debug, Error)]
pub enum AppError {
    #[error("failed to bind TCP listener: {0}")]
    Bind(#[source] std::io::Error),
    #[error("HTTP server stopped unexpectedly: {0}")]
    Serve(#[source] std::io::Error),
    #[error("duckdb error: {0}")]
    DuckDb(#[from] duckdb::Error),
    #[error("CSV error: {0}")]
    Csv(#[from] csv::Error),
    #[error("spreadsheet error: {0}")]
    Spreadsheet(#[from] calamine::Error),
    #[error("JSON error: {0}")]
    Json(#[from] serde_json::Error),
    #[error("UTF-8 error: {0}")]
    Utf8(#[from] FromUtf8Error),
    #[error("task join error: {0}")]
    Join(#[from] tokio::task::JoinError),
    #[error("I/O error: {0}")]
    Io(#[from] std::io::Error),
    #[error("validation error: {0}")]
    Validation(String),
}

impl IntoResponse for AppError {
    fn into_response(self) -> Response {
        let status = match self {
            AppError::Validation(_) => StatusCode::BAD_REQUEST,
            _ => StatusCode::INTERNAL_SERVER_ERROR,
        };
        let body = Json(json!({"error": self.to_string()}));
        (status, body).into_response()
    }
}