From 30d7c11db792cd63a4745b0128783bf66112d839 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Mon, 28 Dec 2020 18:35:08 -0800
Subject: [PATCH] ircd::m::presence: Add prefetch() to interface.

---
 include/ircd/m/presence.h |  1 +
 matrix/presence.cc        | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/ircd/m/presence.h b/include/ircd/m/presence.h
index 70966f63a..6ed331b8e 100644
--- a/include/ircd/m/presence.h
+++ b/include/ircd/m/presence.h
@@ -38,6 +38,7 @@ struct ircd::m::presence
 
 	static bool valid_state(const string_view &state);
 
+	static bool prefetch(const user &);
 	static event::idx get(std::nothrow_t, const user &);
 	static event::idx get(const user &);
 
diff --git a/matrix/presence.cc b/matrix/presence.cc
index 863fdabb8..98b19c467 100644
--- a/matrix/presence.cc
+++ b/matrix/presence.cc
@@ -148,6 +148,22 @@ ircd::m::presence::get(const std::nothrow_t,
 	return state.get(std::nothrow, "ircd.presence", "");
 }
 
+bool
+ircd::m::presence::prefetch(const m::user &user)
+{
+	const m::user::room user_room
+	{
+		user
+	};
+
+	const m::room::state state
+	{
+		user_room
+	};
+
+	return state.prefetch("ircd.presence", "");
+}
+
 ircd::m::event::id::buf
 ircd::m::presence::set(const m::presence &content)
 {