feat: allow users to specify who is notified when starting a call

crates/core/database/src/voice/mod.rs

@@ -124,9 +124,7 @@ pub async fn get_user_voice_channel_in_server(
 
     let unique_key = format!("{user_id}:{server_id}");
 
-    conn.get(&unique_key)
-        .await
-        .to_internal_error()
+    conn.get(&unique_key).await.to_internal_error()
 }
 
 pub fn get_allowed_sources(
@@ -479,3 +477,32 @@ pub async fn take_channel_call_started_system_message(channel_id: &str) -> Resul
         .await
         .to_internal_error()
 }
+
+pub async fn set_call_notification_recipients(
+    channel_id: &str,
+    user_id: &str,
+    recipients: &[String],
+) -> Result<()> {
+    get_connection()
+        .await?
+        .set_ex(
+            format!("call_notification_recipients:{channel_id}-{user_id}"),
+            recipients,
+            10,
+        )
+        .await
+        .to_internal_error()
+}
+
+pub async fn get_call_notification_recipients(
+    channel_id: &str,
+    user_id: &str,
+) -> Result<Option<Vec<String>>> {
+    get_connection()
+        .await?
+        .get_del(format!(
+            "call_notification_recipients:{channel_id}-{user_id}"
+        ))
+        .await
+        .to_internal_error()
+}

crates/core/models/src/v0/channels.rs

@@ -294,10 +294,14 @@ auto_derived!(
     pub struct DataJoinCall {
         /// Name of the node to join
         pub node: Option<String>,
-        /// Whether to force disconnect any other existing voice connections.
+        /// Whether to force disconnect any other existing voice connections
         ///
-        /// useful for disconnecting on another device and joining on a new.
+        /// Useful for disconnecting on another device and joining on a new.
         pub force_disconnect: Option<bool>,
+        /// Users which should be notified of the call starting
+        ///
+        /// Only used when the user is the first one connected.
+        pub recipients: Option<Vec<String>>,
     }
 );