From 617172576b95bbb935a75f98a98787da5a4e9a9d Mon Sep 17 00:00:00 2001
From: Owen Jacobson <owen@grimoire.ca>
Date: Thu, 3 Oct 2024 20:44:07 -0400
Subject: List messages per channel.

---
 src/channel/routes.rs | 76 +++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 64 insertions(+), 12 deletions(-)

(limited to 'src/channel/routes.rs')

diff --git a/src/channel/routes.rs b/src/channel/routes.rs
index bce634e..23c0602 100644
--- a/src/channel/routes.rs
+++ b/src/channel/routes.rs
@@ -7,13 +7,14 @@ use axum::{
 };
 use axum_extra::extract::Query;
 
-use super::{
-    app::{self, DeleteError},
-    Channel, Id,
-};
+use super::{app, Channel, Id};
 use crate::{
-    app::App, clock::RequestedAt, error::Internal, event::Sequence, login::Login,
-    message::app::SendError,
+    app::App,
+    clock::RequestedAt,
+    error::Internal,
+    event::{Instant, Sequence},
+    login::Login,
+    message::{self, app::SendError},
 };
 
 #[cfg(test)]
@@ -25,17 +26,18 @@ pub fn router() -> Router<App> {
         .route("/api/channels", post(on_create))
         .route("/api/channels/:channel", post(on_send))
         .route("/api/channels/:channel", delete(on_delete))
+        .route("/api/channels/:channel/messages", get(messages))
 }
 
 #[derive(Default, serde::Deserialize)]
-struct ListQuery {
+struct ResumeQuery {
     resume_point: Option<Sequence>,
 }
 
 async fn list(
     State(app): State<App>,
     _: Login,
-    Query(query): Query<ListQuery>,
+    Query(query): Query<ResumeQuery>,
 ) -> Result<Channels, Internal> {
     let channels = app.channels().all(query.resume_point).await?;
     let response = Channels(channels);
@@ -127,7 +129,7 @@ async fn on_delete(
     Path(channel): Path<Id>,
     RequestedAt(deleted_at): RequestedAt,
     _: Login,
-) -> Result<StatusCode, DeleteErrorResponse> {
+) -> Result<StatusCode, ErrorResponse> {
     app.channels().delete(&channel, &deleted_at).await?;
 
     Ok(StatusCode::ACCEPTED)
@@ -135,16 +137,66 @@ async fn on_delete(
 
 #[derive(Debug, thiserror::Error)]
 #[error(transparent)]
-struct DeleteErrorResponse(#[from] DeleteError);
+struct ErrorResponse(#[from] app::Error);
 
-impl IntoResponse for DeleteErrorResponse {
+impl IntoResponse for ErrorResponse {
     fn into_response(self) -> Response {
         let Self(error) = self;
         match error {
-            not_found @ DeleteError::NotFound(_) => {
+            not_found @ app::Error::NotFound(_) => {
                 (StatusCode::NOT_FOUND, not_found.to_string()).into_response()
             }
             other => Internal::from(other).into_response(),
         }
     }
 }
+
+async fn messages(
+    State(app): State<App>,
+    Path(channel): Path<Id>,
+    _: Login,
+    Query(query): Query<ResumeQuery>,
+) -> Result<Messages, ErrorResponse> {
+    let messages = app
+        .channels()
+        .messages(&channel, query.resume_point)
+        .await?;
+    let response = Messages(
+        messages
+            .into_iter()
+            .map(|message| MessageView {
+                sent: message.sent,
+                sender: message.sender,
+                message: MessageInner {
+                    id: message.id,
+                    body: message.body,
+                },
+            })
+            .collect(),
+    );
+
+    Ok(response)
+}
+
+struct Messages(Vec<MessageView>);
+
+#[derive(serde::Serialize)]
+struct MessageView {
+    #[serde(flatten)]
+    sent: Instant,
+    sender: Login,
+    message: MessageInner,
+}
+
+#[derive(serde::Serialize)]
+struct MessageInner {
+    id: message::Id,
+    body: String,
+}
+
+impl IntoResponse for Messages {
+    fn into_response(self) -> Response {
+        let Self(messages) = self;
+        Json(messages).into_response()
+    }
+}
-- 
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