backend/src/main.rs

// Invoke-WebRequest -Uri https://ias-tea-axum.shuttleapp.rs/alltea -Method POST -Body '{"note":"Earl Grey Premium"}' -ContentType 'application/json'
// cargo shuttle resource delete database::shared::postgres
// cargo shuttle resource list

use axum::{
    extract::{Path, State},
    http::StatusCode,
    response::IntoResponse,
    routing::{get, post},
    Json, Router,
};
use serde::{Deserialize, Serialize};
use sqlx::{FromRow, PgPool};
use tower_http::services::ServeFile;

async fn retrieve(
    Path(id): Path<i32>,
    State(state): State<MyState>,
) -> Result<impl IntoResponse, impl IntoResponse> {
    println!("retrieve");
    match sqlx::query_as::<_, Tea>("SELECT * FROM tea WHERE id = $1")
        .bind(id)
        .fetch_one(&state.pool)
        .await
    {
        Ok(tea) => Ok((StatusCode::OK, Json(tea))),
        Err(e) => Err((StatusCode::BAD_REQUEST, e.to_string())),
    }
}

async fn retrieve_by_rfid(
    Path(rfid): Path<String>,
    State(state): State<MyState>,
) -> Result<impl IntoResponse, impl IntoResponse> {
    println!("retrieve by rfid");
    match sqlx::query_as::<_, Tea>("SELECT * FROM tea WHERE rfidcode = $1 LIMIT 1")
        .bind(rfid)
        .fetch_optional(&state.pool)
        .await
    {
        Ok(tea) => Ok((StatusCode::OK, Json(tea))),
        Err(e) => Err((StatusCode::BAD_REQUEST, e.to_string())),
    }
}

async fn retrieve_all(
    State(state): State<MyState>,
) -> Result<impl IntoResponse, impl IntoResponse> {
    println!("retrieve all");
    match sqlx::query_as::<_, Tea>("SELECT * FROM tea LIMIT 100")
        .fetch_all(&state.pool)
        .await
    {
        Ok(all_tea) => Ok((StatusCode::OK, Json(all_tea))),
        Err(e) => Err((StatusCode::BAD_REQUEST, e.to_string())),
    }
}

async fn add(
    State(state): State<MyState>,
    Json(data): Json<TeaNew>,
) -> Result<impl IntoResponse, impl IntoResponse> {
    println!("add");
    match sqlx::query_as::<_, Tea>("INSERT INTO tea (teaname, rfidcode, watertemp, steepingseconds) VALUES ($1, $2, $3, $4) RETURNING id, teaname, rfidcode, watertemp, steepingseconds")
        .bind(&data.teaname)
        .bind(&data.rfidcode)
        .bind(&data.watertemp)
        .bind(&data.steepingseconds)
        .fetch_one(&state.pool)
        .await
    {
        Ok(tea) => Ok((StatusCode::CREATED, Json(tea))),
        Err(e) => Err((StatusCode::BAD_REQUEST, e.to_string())),
    }
}

#[derive(Clone)]
struct MyState {
    pool: PgPool,
}

#[shuttle_runtime::main]
async fn main(#[shuttle_shared_db::Postgres] pool: PgPool) -> shuttle_axum::ShuttleAxum {
    sqlx::migrate!()
        .run(&pool)
        .await
        .expect("Failed to run migrations");

    let state = MyState { pool };
    let router = Router::new()
        .nest_service("/", ServeFile::new("assets/index.html"))
        .route("/addtea", post(add))
        .route("/tea/:id", get(retrieve))
        .route("/teabyrfid/:rfid", get(retrieve_by_rfid))
        .route("/alltea", get(retrieve_all))
        .with_state(state);

    Ok(router.into())
}

#[derive(Deserialize)]
struct TeaNew {
    pub teaname: String,
    pub rfidcode: String,
    pub watertemp: i32,
    pub steepingseconds: i32,
}

#[derive(Serialize, FromRow)]
struct Tea {
    pub id: i32,
    pub teaname: String,
    pub rfidcode: String,
    pub watertemp: i32,
    pub steepingseconds: i32,
}