add admin server uptime command

Signed-off-by: Jason Volk <jason@zemos.net>

src/service/admin/server/mod.rs

@@ -5,13 +5,16 @@ use ruma::events::room::message::RoomMessageEventContent;
 
 use self::server_commands::{
 	backup_database, clear_database_caches, clear_service_caches, list_backups, list_database_files, memory_usage,
-	show_config,
+	show_config, uptime,
 };
 use crate::Result;
 
 #[cfg_attr(test, derive(Debug))]
 #[derive(Subcommand)]
 pub(crate) enum ServerCommand {
+	/// - Time elapsed since startup
+	Uptime,
+
 	/// - Show configuration values
 	ShowConfig,
 
@@ -43,6 +46,7 @@ pub(crate) enum ServerCommand {
 
 pub(crate) async fn process(command: ServerCommand, body: Vec<&str>) -> Result<RoomMessageEventContent> {
 	Ok(match command {
+		ServerCommand::Uptime => uptime(body).await?,
 		ServerCommand::ShowConfig => show_config(body).await?,
 		ServerCommand::MemoryUsage => memory_usage(body).await?,
 		ServerCommand::ClearDatabaseCaches {

src/service/admin/server/server_commands.rs

@@ -2,6 +2,24 @@ use ruma::events::room::message::RoomMessageEventContent;
 
 use crate::{services, Result};
 
+pub(crate) async fn uptime(_body: Vec<&str>) -> Result<RoomMessageEventContent> {
+	let seconds = services()
+		.globals
+		.started
+		.elapsed()
+		.expect("standard duration")
+		.as_secs();
+	let result = format!(
+		"up {} days, {} hours, {} minutes, {} seconds.",
+		seconds / 86400,
+		(seconds % 86400) / 60 / 60,
+		(seconds % 3600) / 60,
+		seconds % 60,
+	);
+
+	Ok(RoomMessageEventContent::notice_html(String::new(), result))
+}
+
 pub(crate) async fn show_config(_body: Vec<&str>) -> Result<RoomMessageEventContent> {
 	// Construct and send the response
 	Ok(RoomMessageEventContent::text_plain(format!("{}", services().globals.config)))