2 files changed, 245 insertions, 0 deletions
diff --git a/src/conversation/handlers/delete/mod.rs b/src/conversation/handlers/delete/mod.rs
new file mode 100644
index 0000000..272165a
--- /dev/null
+++ b/src/conversation/handlers/delete/mod.rs
@@ -0,0 +1,61 @@
+use axum::{
+    extract::{Json, Path, State},
+    http::StatusCode,
+    response::{self, IntoResponse},
+};
+
+use crate::{
+    app::App,
+    clock::RequestedAt,
+    conversation::{self, app, handlers::PathInfo},
+    error::{Internal, NotFound},
+    token::extract::Identity,
+};
+
+#[cfg(test)]
+mod test;
+
+pub async fn handler(
+    State(app): State<App>,
+    Path(conversation): Path<PathInfo>,
+    RequestedAt(deleted_at): RequestedAt,
+    _: Identity,
+) -> Result<Response, Error> {
+    app.conversations()
+        .delete(&conversation, &deleted_at)
+        .await?;
+
+    Ok(Response { id: conversation })
+}
+
+#[derive(Debug, serde::Serialize)]
+pub struct Response {
+    pub id: conversation::Id,
+}
+
+impl IntoResponse for Response {
+    fn into_response(self) -> response::Response {
+        (StatusCode::ACCEPTED, Json(self)).into_response()
+    }
+}
+
+#[derive(Debug, thiserror::Error)]
+#[error(transparent)]
+pub struct Error(#[from] pub app::DeleteError);
+
+impl IntoResponse for Error {
+    fn into_response(self) -> response::Response {
+        let Self(error) = self;
+        match error {
+            app::DeleteError::NotFound(_) | app::DeleteError::Deleted(_) => {
+                NotFound(error).into_response()
+            }
+            app::DeleteError::NotEmpty(_) => {
+                (StatusCode::CONFLICT, error.to_string()).into_response()
+            }
+            app::DeleteError::Name(_) | app::DeleteError::Database(_) => {
+                Internal::from(error).into_response()
+            }
+        }
+    }
+}
diff --git a/src/conversation/handlers/delete/test.rs b/src/conversation/handlers/delete/test.rs
new file mode 100644
index 0000000..2718d3b
--- /dev/null
+++ b/src/conversation/handlers/delete/test.rs
@@ -0,0 +1,184 @@
+use axum::extract::{Path, State};
+use itertools::Itertools;
+
+use crate::{conversation::app, test::fixtures};
+
+#[tokio::test]
+pub async fn valid_conversation() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let conversation = fixtures::conversation::create(&app, &fixtures::now()).await;
+
+    // Send the request
+
+    let deleter = fixtures::identity::create(&app, &fixtures::now()).await;
+    let response = super::handler(
+        State(app.clone()),
+        Path(conversation.id.clone()),
+        fixtures::now(),
+        deleter,
+    )
+    .await
+    .expect("deleting a valid conversation succeeds");
+
+    // Verify the response
+
+    assert_eq!(conversation.id, response.id);
+
+    // Verify the semantics
+
+    let snapshot = app.boot().snapshot().await.expect("boot always succeeds");
+    let created = snapshot
+        .events
+        .into_iter()
+        .filter_map(fixtures::event::conversation)
+        .filter_map(fixtures::event::conversation::created)
+        .exactly_one()
+        .expect("only one conversation has been created");
+    // We don't expect `conversation` to match the event exactly, as the name will have
+    // been tombstoned and the conversation given a `deleted_at` date.
+    assert_eq!(conversation.id, created.conversation.id);
+}
+
+#[tokio::test]
+pub async fn invalid_conversation_id() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+
+    // Send the request
+
+    let deleter = fixtures::identity::create(&app, &fixtures::now()).await;
+    let conversation = fixtures::conversation::fictitious();
+    let super::Error(error) = super::handler(
+        State(app.clone()),
+        Path(conversation.clone()),
+        fixtures::now(),
+        deleter,
+    )
+    .await
+    .expect_err("deleting a nonexistent conversation fails");
+
+    // Verify the response
+
+    assert!(matches!(error, app::DeleteError::NotFound(id) if id == conversation));
+}
+
+#[tokio::test]
+pub async fn conversation_deleted() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let conversation = fixtures::conversation::create(&app, &fixtures::now()).await;
+
+    app.conversations()
+        .delete(&conversation.id, &fixtures::now())
+        .await
+        .expect("deleting a recently-created conversation succeeds");
+
+    // Send the request
+
+    let deleter = fixtures::identity::create(&app, &fixtures::now()).await;
+    let super::Error(error) = super::handler(
+        State(app.clone()),
+        Path(conversation.id.clone()),
+        fixtures::now(),
+        deleter,
+    )
+    .await
+    .expect_err("deleting a deleted conversation fails");
+
+    // Verify the response
+
+    assert!(matches!(error, app::DeleteError::Deleted(id) if id == conversation.id));
+}
+
+#[tokio::test]
+pub async fn conversation_expired() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let conversation = fixtures::conversation::create(&app, &fixtures::ancient()).await;
+
+    app.conversations()
+        .expire(&fixtures::now())
+        .await
+        .expect("expiring conversations always succeeds");
+
+    // Send the request
+
+    let deleter = fixtures::identity::create(&app, &fixtures::now()).await;
+    let super::Error(error) = super::handler(
+        State(app.clone()),
+        Path(conversation.id.clone()),
+        fixtures::now(),
+        deleter,
+    )
+    .await
+    .expect_err("deleting an expired conversation fails");
+
+    // Verify the response
+
+    assert!(matches!(error, app::DeleteError::Deleted(id) if id == conversation.id));
+}
+
+#[tokio::test]
+pub async fn conversation_purged() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let conversation = fixtures::conversation::create(&app, &fixtures::ancient()).await;
+
+    app.conversations()
+        .expire(&fixtures::old())
+        .await
+        .expect("expiring conversations always succeeds");
+
+    app.conversations()
+        .purge(&fixtures::now())
+        .await
+        .expect("purging conversations always succeeds");
+
+    // Send the request
+
+    let deleter = fixtures::identity::create(&app, &fixtures::now()).await;
+    let super::Error(error) = super::handler(
+        State(app.clone()),
+        Path(conversation.id.clone()),
+        fixtures::now(),
+        deleter,
+    )
+    .await
+    .expect_err("deleting a purged conversation fails");
+
+    // Verify the response
+
+    assert!(matches!(error, app::DeleteError::NotFound(id) if id == conversation.id));
+}
+
+#[tokio::test]
+pub async fn conversation_not_empty() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let conversation = fixtures::conversation::create(&app, &fixtures::now()).await;
+    let sender = fixtures::user::create(&app, &fixtures::now()).await;
+    fixtures::message::send(&app, &conversation, &sender, &fixtures::now()).await;
+
+    // Send the request
+
+    let deleter = fixtures::identity::create(&app, &fixtures::now()).await;
+    let super::Error(error) = super::handler(
+        State(app.clone()),
+        Path(conversation.id.clone()),
+        fixtures::now(),
+        deleter,
+    )
+    .await
+    .expect_err("deleting a conversation with messages fails");
+
+    // Verify the response
+
+    assert!(matches!(error, app::DeleteError::NotEmpty(id) if id == conversation.id));
+}