First one (#8)

Reviewed-on: phoenix/textsender_api#8

src/auth/mod.rs

@@ -0,0 +1,61 @@
+use axum::{
+    Json,
+    http::{Request, StatusCode},
+    middleware::Next,
+    response::IntoResponse,
+};
+use axum_extra::extract::cookie::CookieJar;
+use jsonwebtoken::{DecodingKey, Validation, decode};
+
+#[derive(Debug, serde::Serialize)]
+pub struct ErrorResponse {
+    pub status: &'static str,
+    pub message: String,
+}
+
+pub async fn auth<B>(
+    cookie_jar: CookieJar,
+    req: Request<axum::body::Body>,
+    next: Next,
+) -> Result<impl IntoResponse, (StatusCode, Json<ErrorResponse>)> {
+    let token = cookie_jar
+        .get("token")
+        .map(|cookie| cookie.value().to_string())
+        .or_else(|| {
+            req.headers()
+                .get(axum::http::header::AUTHORIZATION)
+                .and_then(|auth_header| auth_header.to_str().ok())
+                .and_then(|auth_value| auth_value.strip_prefix("Bearer ").map(String::from))
+        });
+
+    let token = token.ok_or_else(|| {
+        let json_error = ErrorResponse {
+            status: "fail",
+            message: "You are not logged in, please provide token".to_string(),
+        };
+        (StatusCode::UNAUTHORIZED, Json(json_error))
+    })?;
+
+    let secret_key = textsender_models::envy::environment::get_secret_main_key()
+        .await
+        .value;
+
+    let mut validation = Validation::new(jsonwebtoken::Algorithm::HS256);
+    validation.set_audience(&["textsender"]); // Must match exactly what's in the token
+    let _claims = decode::<textsender_models::token::Claims>(
+        &token,
+        &DecodingKey::from_secret(secret_key.as_ref()),
+        &validation,
+    )
+    .map_err(|err| {
+        eprintln!("Error: {err:?}");
+        let json_error = ErrorResponse {
+            status: "fail",
+            message: "Invalid token - Error decoding claims".to_string(),
+        };
+        (StatusCode::UNAUTHORIZED, Json(json_error))
+    })?
+    .claims;
+
+    Ok(next.run(req).await)
+}