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|
use axum::{
Router,
extract::{Query, State},
http::StatusCode,
response::{IntoResponse, Json, Response},
routing::{get, post},
};
use chrono::{DateTime, NaiveDate, Utc};
use dotenvy::dotenv;
use serde::{Deserialize, Serialize};
use serde_json::{Value, from_value};
use sqlx::{PgPool, postgres::PgPoolOptions};
use std::env;
use uuid::Uuid;
const DATABASE_URL_FALLBACK: &str = "postgres://health:health@127.0.0.1:5432/health";
#[derive(sqlx::Type, Serialize, Deserialize)]
#[sqlx(type_name = "metric_type")]
pub enum MetricType {
BodyWeight,
Hip,
Waist,
}
#[derive(sqlx::Type, Serialize, Deserialize)]
#[sqlx(type_name = "unit")]
pub enum Unit {
Kilogram,
Centimeter,
}
#[derive(Serialize)]
pub struct MeasurementView {
id: Uuid,
measured_at: DateTime<Utc>,
metric_type: MetricType,
value: f64,
unit: Unit,
}
#[derive(Deserialize)]
pub struct MeasurementData {
measured_at: DateTime<Utc>,
metric_type: MetricType,
value: f64,
unit: Unit,
}
#[derive(Deserialize)]
pub struct DateQuery {
date: Option<String>,
from: Option<String>,
to: Option<String>,
}
#[tokio::main]
async fn main() -> anyhow::Result<()> {
tracing_subscriber::fmt::init();
dotenv().ok();
let database_url =
env::var("DATABASE_URL").unwrap_or_else(|_| DATABASE_URL_FALLBACK.to_owned());
let pool = PgPoolOptions::new()
.max_connections(5)
.connect(&database_url)
.await?;
let app = Router::new()
.route("/", get(index))
.route("/all", get(all))
.route("/add", post(add))
.route("/search", get(search))
.with_state(pool);
let listener = tokio::net::TcpListener::bind("0.0.0.0:3000").await?;
tracing::info!("listening at 0.0.0.0:3000");
axum::serve(listener, app).await?;
Ok(())
}
async fn index() -> &'static str {
"Hello World!"
}
async fn all(State(pool): State<PgPool>) -> Result<Json<Vec<MeasurementView>>, StatusCode> {
sqlx::query_as!(MeasurementView, "SELECT * FROM measurement")
.fetch_all(&pool)
.await
.map(Json)
.map_err(|e| {
tracing::error!("failed to fetch measurements: {e}");
StatusCode::INTERNAL_SERVER_ERROR
})
}
async fn add(State(pool): State<PgPool>, Json(row): Json<Value>) -> Response {
if let Ok(insert_row) = from_value::<MeasurementData>(row) {
match sqlx::query!(
"
INSERT INTO measurement (id, measured_at, metric_type, value, unit)
VALUES ($1, $2, $3, $4, $5)
RETURNING id
",
Uuid::now_v7(),
insert_row.measured_at,
insert_row.metric_type,
insert_row.value,
insert_row.unit
)
.fetch_one(&pool)
.await
{
Ok(rec) => (StatusCode::CREATED, Json(rec.id)).into_response(),
Err(sqlx::Error::Database(e)) if e.is_unique_violation() => {
StatusCode::CONFLICT.into_response()
}
Err(_) => StatusCode::INTERNAL_SERVER_ERROR.into_response(),
}
} else {
StatusCode::UNPROCESSABLE_ENTITY.into_response()
}
}
async fn search(
State(pool): State<PgPool>,
Query(date_query): Query<DateQuery>,
) -> Result<Json<Vec<MeasurementView>>, StatusCode> {
if date_query.date.is_some() && (date_query.from.is_some() || date_query.to.is_some()) {
return Err(StatusCode::BAD_REQUEST);
}
let (start, end) = if let Some(date) = &date_query.date {
let Ok(date) = date.parse::<NaiveDate>() else {
return Err(StatusCode::BAD_REQUEST);
};
let Some(next_day) = date.succ_opt() else {
return Err(StatusCode::BAD_REQUEST);
};
(
Some(date.and_hms_opt(0, 0, 0).unwrap().and_utc()),
Some(next_day.and_hms_opt(0, 0, 0).unwrap().and_utc()),
)
} else {
let start = match &date_query.from {
Some(from) => {
let Ok(from) = from.parse::<NaiveDate>() else {
return Err(StatusCode::BAD_REQUEST);
};
Some(from.and_hms_opt(0, 0, 0).unwrap().and_utc())
}
None => None,
};
let end = match &date_query.to {
Some(to) => {
let Ok(to) = to.parse::<NaiveDate>() else {
return Err(StatusCode::BAD_REQUEST);
};
let Some(next_day) = to.succ_opt() else {
return Err(StatusCode::BAD_REQUEST);
};
Some(next_day.and_hms_opt(0, 0, 0).unwrap().and_utc())
}
None => None,
};
(start, end)
};
if start.is_none() && end.is_none() {
return Err(StatusCode::BAD_REQUEST);
}
if let (Some(start), Some(end)) = (start, end)
&& start >= end
{
return Err(StatusCode::BAD_REQUEST);
}
sqlx::query_as!(
MeasurementView,
"SELECT * FROM measurement
WHERE ($1::timestamptz IS NULL OR measured_at >= $1)
AND ($2::timestamptz IS NULL OR measured_at < $2)",
start,
end
)
.fetch_all(&pool)
.await
.map(Json)
.map_err(|e| {
tracing::error!("failed to fetch measurements: {e}");
StatusCode::INTERNAL_SERVER_ERROR
})
}
|
