From d2985c3be8ce3afd904e1697b111aae37195111a Mon Sep 17 00:00:00 2001
From: cqql <cqql.0@proton.me>
Date: Mon, 12 Aug 2024 20:50:45 +0200
Subject: [PATCH] sending chat history on request work in progress

---
 model/src/proto/c2s.rs |  2 ++
 server/src/lib.rs      | 37 +++++++++++++++++++++++++++++--------
 2 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/model/src/proto/c2s.rs b/model/src/proto/c2s.rs
index f24f1bf..a7a3ee5 100644
--- a/model/src/proto/c2s.rs
+++ b/model/src/proto/c2s.rs
@@ -4,6 +4,7 @@ pub mod s {
 	#[derive(Debug, serde::Serialize, serde::Deserialize)]
 	pub enum Packet {
 		Message(crate::messages::Model),
+		RequestChatHistory(uuid::Uuid)
 	}
 }
 
@@ -13,6 +14,7 @@ pub mod c {
 	#[derive(Debug, serde::Serialize, serde::Deserialize)]
 	pub enum Packet {
 		Message(crate::messages::Model),
+		MessagesHistory(Vec<crate::messages::Model>),
 	}
 }
 
diff --git a/server/src/lib.rs b/server/src/lib.rs
index 567f147..ad0531d 100644
--- a/server/src/lib.rs
+++ b/server/src/lib.rs
@@ -1,8 +1,8 @@
 use std::sync::Arc;
 
 use futures_util::FutureExt;
-use scct_model::{chats, proto::c2s, users};
-use sea_orm::{ActiveModelTrait, ConnectionTrait, DatabaseConnection, IntoActiveModel};
+use scct_model::{chats, messages, proto::c2s, users};
+use sea_orm::{ActiveModelTrait, ConnectionTrait, DatabaseConnection, EntityTrait, IntoActiveModel, ColumnTrait, QueryFilter, QueryOrder};
 use tokio::sync::Mutex;
 use transport::{Transport, TransportSink, TransportStream};
 use uuid;
@@ -17,11 +17,17 @@ pub async fn serve(addr: &str, db_connection: DatabaseConnection) -> Result<(),
 	tracing::info!("preparing C2S transport");
 	let mut listener = c2s.serve(addr.to_string()).await?;
 
-	let chat = chats::Model {
-		id: uuid::Uuid::nil(), // temporarily we have only one chat
-		name: String::from("global")
-	};
-	chat.clone().into_active_model().insert(&db_connection).await.expect("failed to create global chat");
+	// create the development chat if not exists
+	if let Ok(None) = chats::Entity::find_by_id(uuid::Uuid::nil()).one(&db_connection).await {
+		let chat = chats::Model {
+			id: uuid::Uuid::nil(), // temporarily we have only one chat
+			name: String::from("global")
+		};
+		match chat.clone().into_active_model().insert(&db_connection).await {
+			Ok(_) => {},
+			Err(_) => {},
+		};
+	}
 
 	tracing::info!("listening for connections");
 	while let Some((tx, rx)) = listener.recv().await {
@@ -39,7 +45,7 @@ pub async fn serve(addr: &str, db_connection: DatabaseConnection) -> Result<(),
 }
 
 /// Connection handler for handling a connecting client
-async fn handle(active_client_peers: Arc<Mutex<Vec<impl TransportSink>>>, mut rx: impl TransportStream, db_connection: impl ConnectionTrait) {
+async fn handle(active_client_peers: Arc<Mutex<Vec<impl TransportSink>>>, mut rx: impl TransportStream, db_connection: impl ConnectionTrait) {	
 	// for now we're creating a new user for each connection
 	let new_client_id = uuid::Uuid::new_v4();
 	let user = users::Model{ 
@@ -82,6 +88,21 @@ async fn handle(active_client_peers: Arc<Mutex<Vec<impl TransportSink>>>, mut rx
 						active_client_peers.lock().await.remove(i);
 					}
 				},
+				c2s::s::Packet::RequestChatHistory(chat_uuid) => {
+					// send the user all messages in the history of this chat
+					match messages::Entity::find()
+					.filter(messages::Column::ChatId.eq(chat_uuid))
+					.order_by_asc(messages::Column::Created)
+					.all(&db_connection)
+					.await {
+						Err(_) => { tracing::error!("failed to query all previously sent messages"); }
+						Ok(messages) => {
+							tracing::info!("responding to RequestChatHistory: {}", serde_json::to_string(&messages).unwrap());
+							// how do i know which TransportSink is the sink of the handlee? (which tx is me?)
+							todo!();
+						}
+					};
+				},
 			},
 		}
 	}