Creation of a reminder via web api

Concurrently run the reminder service as well as an web endpoint to
create a new reminder. Note that a new reminder does not notify the
reminder service yet.

Cargo update dependencies

src/api.rs

@@ -0,0 +1,69 @@
+use crate::{schema, NewReminder};
+use anyhow::Error;
+use axum::{
+    extract::State,
+    http::StatusCode,
+    response::{IntoResponse, Response, Result},
+    Json,
+};
+use diesel::{
+    prelude::*,
+    r2d2::{ConnectionManager, Pool},
+};
+use serde::Deserialize;
+use time::OffsetDateTime;
+use tracing::{error, trace};
+
+pub struct ServerError(Error);
+
+impl IntoResponse for ServerError {
+    fn into_response(self) -> Response {
+        error!("{}", self.0);
+        (StatusCode::INTERNAL_SERVER_ERROR, "Something went wrong.").into_response()
+    }
+}
+
+impl<E> From<E> for ServerError
+where
+    E: Into<Error>,
+{
+    fn from(err: E) -> Self {
+        Self(err.into())
+    }
+}
+
+#[derive(Debug, Deserialize)]
+pub struct CreateReminder {
+    #[serde(with = "time::serde::iso8601")]
+    planned: OffsetDateTime,
+    title: String,
+    message: String,
+    receiver: String,
+}
+
+#[allow(clippy::unused_async)]
+pub async fn create_reminder(
+    State(db_pool): State<Pool<ConnectionManager<PgConnection>>>,
+    Json(data): Json<CreateReminder>,
+) -> Result<impl IntoResponse, ServerError> {
+    let reminder = NewReminder {
+        created: OffsetDateTime::now_utc(),
+        planned: data.planned,
+        title: &data.title,
+        message: &data.message,
+        receiver: &data.receiver,
+    };
+
+    trace!(?data, "received data");
+
+    diesel::insert_into(schema::reminders::table)
+        .values(&reminder)
+        .execute(&mut db_pool.get()?)?;
+
+    Ok((StatusCode::CREATED, "Reminder created".to_string()))
+}
+
+#[allow(clippy::unused_async)]
+pub async fn not_found() -> impl IntoResponse {
+    (StatusCode::NOT_FOUND, "Page not found")
+}