Reorganize and consolidate HTTP routes.

HTTP routes are now defined in a single, unified module, pulling them out of the topical modules they were formerly part of.

This is intended to improve the navigability of the codebase. Previously, finding the handler corresponding to a specific endpoint required prior familiarity, though in practice you could usually guess from topic area. Now, all routes are defined in one place; if you know the path, you can read down the list to find the handler.

Handlers themselves live with the domain they are most appropriately "part of," generally (in this version, universally) in a `handlers` submodule. The handlers themselves have been flattened down; rather than representing a path and a method, they now represent a named operation (which is suspiciously similar to the path in most cases). This means that we no longer have constructs like `crate::ui::routes::ch::channel` - it's now `crate::ui::handlers::channel` instead.

## Disclaimer

I Solemnly Swear I Didn't Change Any Handlers.

## Prior art

I've inadvertently reinvented Django's `urls.py` convention, and I've opted to lean into that.

Merges flatter-routes-reorg into main.

1 files changed, 236 insertions, 0 deletions

diff --git a/src/invite/handlers/accept/test.rs b/src/invite/handlers/accept/test.rs
new file mode 100644
index 0000000..cb13900
--- /dev/null
+++ b/src/invite/handlers/accept/test.rs
@@ -0,0 +1,236 @@
+use axum::extract::{Json, Path, State};
+
+use crate::{invite::app::AcceptError, name::Name, test::fixtures};
+
+#[tokio::test]
+async fn valid_invite() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let issuer = fixtures::user::create(&app, &fixtures::now()).await;
+    let invite = fixtures::invite::issue(&app, &issuer, &fixtures::now()).await;
+
+    // Call the endpoint
+
+    let (name, password) = fixtures::user::propose();
+    let identity = fixtures::cookie::not_logged_in();
+    let request = super::Request {
+        name: name.clone(),
+        password: password.clone(),
+    };
+    let (identity, Json(response)) = super::handler(
+        State(app.clone()),
+        fixtures::now(),
+        identity,
+        Path(invite.id),
+        Json(request),
+    )
+    .await
+    .expect("accepting a valid invite succeeds");
+
+    // Verify the response
+
+    assert!(identity.secret().is_some());
+    assert_eq!(name, response.name);
+
+    // Verify that the issued token is valid
+
+    let secret = identity
+        .secret()
+        .expect("newly-issued identity has a token secret");
+    let (_, login) = app
+        .tokens()
+        .validate(&secret, &fixtures::now())
+        .await
+        .expect("newly-issued identity cookie is valid");
+    assert_eq!(response, login);
+
+    // Verify that the given credentials can log in
+
+    let (login, _) = app
+        .tokens()
+        .login(&name, &password, &fixtures::now())
+        .await
+        .expect("credentials given on signup are valid");
+    assert_eq!(response, login);
+}
+
+#[tokio::test]
+async fn nonexistent_invite() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let invite = fixtures::invite::fictitious();
+
+    // Call the endpoint
+
+    let (name, password) = fixtures::user::propose();
+    let identity = fixtures::cookie::not_logged_in();
+    let request = super::Request {
+        name: name.clone(),
+        password: password.clone(),
+    };
+    let super::Error(error) = super::handler(
+        State(app.clone()),
+        fixtures::now(),
+        identity,
+        Path(invite.clone()),
+        Json(request),
+    )
+    .await
+    .expect_err("accepting a nonexistent invite fails");
+
+    // Verify the response
+
+    assert!(matches!(error, AcceptError::NotFound(error_id) if error_id == invite));
+}
+
+#[tokio::test]
+async fn expired_invite() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let issuer = fixtures::user::create(&app, &fixtures::ancient()).await;
+    let invite = fixtures::invite::issue(&app, &issuer, &fixtures::ancient()).await;
+
+    app.invites()
+        .expire(&fixtures::now())
+        .await
+        .expect("expiring invites never fails");
+
+    // Call the endpoint
+
+    let (name, password) = fixtures::user::propose();
+    let identity = fixtures::cookie::not_logged_in();
+    let request = super::Request {
+        name: name.clone(),
+        password: password.clone(),
+    };
+    let super::Error(error) = super::handler(
+        State(app.clone()),
+        fixtures::now(),
+        identity,
+        Path(invite.id.clone()),
+        Json(request),
+    )
+    .await
+    .expect_err("accepting a nonexistent invite fails");
+
+    // Verify the response
+
+    assert!(matches!(error, AcceptError::NotFound(error_id) if error_id == invite.id));
+}
+
+#[tokio::test]
+async fn accepted_invite() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let issuer = fixtures::user::create(&app, &fixtures::ancient()).await;
+    let invite = fixtures::invite::issue(&app, &issuer, &fixtures::ancient()).await;
+
+    let (name, password) = fixtures::user::propose();
+    app.invites()
+        .accept(&invite.id, &name, &password, &fixtures::now())
+        .await
+        .expect("accepting a valid invite succeeds");
+
+    // Call the endpoint
+
+    let (name, password) = fixtures::user::propose();
+    let identity = fixtures::cookie::not_logged_in();
+    let request = super::Request {
+        name: name.clone(),
+        password: password.clone(),
+    };
+    let super::Error(error) = super::handler(
+        State(app.clone()),
+        fixtures::now(),
+        identity,
+        Path(invite.id.clone()),
+        Json(request),
+    )
+    .await
+    .expect_err("accepting a nonexistent invite fails");
+
+    // Verify the response
+
+    assert!(matches!(error, AcceptError::NotFound(error_id) if error_id == invite.id));
+}
+
+#[tokio::test]
+async fn conflicting_name() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let issuer = fixtures::user::create(&app, &fixtures::ancient()).await;
+    let invite = fixtures::invite::issue(&app, &issuer, &fixtures::ancient()).await;
+
+    let existing_name = Name::from("rijksmuseum");
+    app.users()
+        .create(
+            &existing_name,
+            &fixtures::user::propose_password(),
+            &fixtures::now(),
+        )
+        .await
+        .expect("creating a user in an empty environment succeeds");
+
+    // Call the endpoint
+
+    let conflicting_name = Name::from("r\u{0133}ksmuseum");
+    let password = fixtures::user::propose_password();
+
+    let identity = fixtures::cookie::not_logged_in();
+    let request = super::Request {
+        name: conflicting_name.clone(),
+        password: password.clone(),
+    };
+    let super::Error(error) = super::handler(
+        State(app.clone()),
+        fixtures::now(),
+        identity,
+        Path(invite.id.clone()),
+        Json(request),
+    )
+    .await
+    .expect_err("accepting a nonexistent invite fails");
+
+    // Verify the response
+
+    assert!(
+        matches!(error, AcceptError::DuplicateLogin(error_name) if error_name == conflicting_name)
+    );
+}
+
+#[tokio::test]
+async fn invalid_name() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let issuer = fixtures::user::create(&app, &fixtures::now()).await;
+    let invite = fixtures::invite::issue(&app, &issuer, &fixtures::now()).await;
+
+    // Call the endpoint
+
+    let name = fixtures::user::propose_invalid_name();
+    let password = fixtures::user::propose_password();
+    let identity = fixtures::cookie::not_logged_in();
+    let request = super::Request {
+        name: name.clone(),
+        password: password.clone(),
+    };
+    let super::Error(error) = super::handler(
+        State(app.clone()),
+        fixtures::now(),
+        identity,
+        Path(invite.id),
+        Json(request),
+    )
+    .await
+    .expect_err("using an invalid name should fail");
+
+    // Verify the response
+
+    assert!(matches!(error, AcceptError::InvalidName(error_name) if name == error_name));
+}