From eabeb7ed7b641dea0b8e71ab33ab97b4ed7a4cda Mon Sep 17 00:00:00 2001
From: Ilion Beyst <ilion.beyst@gmail.com>
Date: Mon, 13 Dec 2021 22:41:20 +0100
Subject: start implementing basic login functionality

---
 backend/src/routes/mod.rs   |   1 +
 backend/src/routes/users.rs | 100 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 101 insertions(+)
 create mode 100644 backend/src/routes/mod.rs
 create mode 100644 backend/src/routes/users.rs

(limited to 'backend/src/routes')

diff --git a/backend/src/routes/mod.rs b/backend/src/routes/mod.rs
new file mode 100644
index 0000000..913bd46
--- /dev/null
+++ b/backend/src/routes/mod.rs
@@ -0,0 +1 @@
+pub mod users;
diff --git a/backend/src/routes/users.rs b/backend/src/routes/users.rs
new file mode 100644
index 0000000..274b712
--- /dev/null
+++ b/backend/src/routes/users.rs
@@ -0,0 +1,100 @@
+use crate::db::{sessions, users};
+use crate::{
+    db::users::{Credentials, User},
+    DbConn,
+};
+use rocket::serde::json::Json;
+use serde::{Deserialize, Serialize};
+
+use rocket::http::Status;
+use rocket::request::{self, FromRequest, Outcome, Request};
+
+#[derive(Debug)]
+pub enum AuthTokenError {
+    BadCount,
+    Missing,
+    Invalid,
+}
+
+// TODO: error handling and proper lifetimes
+#[rocket::async_trait]
+impl<'r> FromRequest<'r> for User {
+    type Error = AuthTokenError;
+
+    async fn from_request(request: &'r Request<'_>) -> Outcome<Self, Self::Error> {
+        let keys: Vec<_> = request.headers().get("Authorization").collect();
+        let token = match keys.len() {
+            0 => return Outcome::Failure((Status::BadRequest, AuthTokenError::Missing)),
+            1 => keys[0].to_string(),
+            _ => return Outcome::Failure((Status::BadRequest, AuthTokenError::BadCount)),
+        };
+        let db = request.guard::<DbConn>().await.unwrap();
+        let (_session, user) = db
+            .run(move |conn| sessions::find_user_by_session(&token, conn))
+            .await
+            .unwrap();
+        Outcome::Success(user)
+    }
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct UserData {
+    pub user_id: i32,
+    pub username: String,
+}
+
+impl From<User> for UserData {
+    fn from(user: User) -> Self {
+        UserData {
+            user_id: user.user_id,
+            username: user.username,
+        }
+    }
+}
+
+#[derive(Deserialize)]
+pub struct RegistrationParams {
+    pub username: String,
+    pub password: String,
+}
+
+#[post("/register", data = "<params>")]
+pub async fn register(db_conn: DbConn, params: Json<RegistrationParams>) -> Json<UserData> {
+    db_conn
+        .run(move |conn| {
+            let credentials = Credentials {
+                username: &params.username,
+                password: &params.password,
+            };
+            let user = users::create_user(&credentials, conn).unwrap();
+            Json(user.into())
+        })
+        .await
+}
+
+#[derive(Deserialize)]
+pub struct LoginParams {
+    pub username: String,
+    pub password: String,
+}
+
+#[post("/login", data = "<params>")]
+pub async fn login(db_conn: DbConn, params: Json<LoginParams>) -> String {
+    db_conn
+        .run(move |conn| {
+            let credentials = Credentials {
+                username: &params.username,
+                password: &params.password,
+            };
+            // TODO: handle failures
+            let user = users::authenticate_user(&credentials, conn).unwrap();
+            let session = sessions::create_session(&user, conn);
+            return session.token;
+        })
+        .await
+}
+
+#[get("/users/me")]
+pub async fn current_user(user: User) -> Json<UserData> {
+    Json(user.into())
+}
-- 
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