add admin query resolver commands

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

src/admin/debug/commands.rs

@@ -614,15 +614,16 @@ pub(super) async fn resolve_true_destination(
 	let state = &services().server.log.capture;
 	let logs = Arc::new(Mutex::new(String::new()));
 	let capture = Capture::new(state, Some(filter), capture::fmt_markdown(logs.clone()));
-	let (actual_dest, hostname_uri);
-	{
-		let _capture_scope = capture.start();
-		(actual_dest, hostname_uri) = resolve_actual_dest(&server_name, !no_cache).await?;
-	};
+
+	let capture_scope = capture.start();
+	let actual = resolve_actual_dest(&server_name, !no_cache).await?;
+	drop(capture_scope);
 
 	let msg = format!(
-		"{}\nDestination: {actual_dest}\nHostname URI: {hostname_uri}",
-		logs.lock().expect("locked")
+		"{}\nDestination: {}\nHostname URI: {}",
+		logs.lock().expect("locked"),
+		actual.dest,
+		actual.host,
 	);
 	Ok(RoomMessageEventContent::text_markdown(msg))
 }

src/admin/query/mod.rs

@@ -2,6 +2,7 @@ mod account_data;
 mod appservice;
 mod globals;
 mod presence;
+mod resolver;
 mod room_alias;
 mod room_state_cache;
 mod sending;
@@ -12,12 +13,12 @@ use conduit::Result;
 use room_state_cache::room_state_cache;
 use ruma::{
 	events::{room::message::RoomMessageEventContent, RoomAccountDataEventType},
-	RoomAliasId, RoomId, ServerName, UserId,
+	OwnedServerName, RoomAliasId, RoomId, ServerName, UserId,
 };
 
 use self::{
-	account_data::account_data, appservice::appservice, globals::globals, presence::presence, room_alias::room_alias,
-	sending::sending, users::users,
+	account_data::account_data, appservice::appservice, globals::globals, presence::presence, resolver::resolver,
+	room_alias::room_alias, sending::sending, users::users,
 };
 
 #[cfg_attr(test, derive(Debug))]
@@ -55,6 +56,10 @@ pub(super) enum QueryCommand {
 	/// - users.rs iterators and getters
 	#[command(subcommand)]
 	Users(Users),
+
+	/// - resolver service
+	#[command(subcommand)]
+	Resolver(Resolver),
 }
 
 #[cfg_attr(test, derive(Debug))]
@@ -287,6 +292,21 @@ pub(super) enum Users {
 	Iter,
 }
 
+#[cfg_attr(test, derive(Debug))]
+#[derive(Subcommand)]
+/// Resolver service and caches
+pub(super) enum Resolver {
+	/// Query the destinations cache
+	DestinationsCache {
+		server_name: Option<OwnedServerName>,
+	},
+
+	/// Query the overrides cache
+	OverridesCache {
+		name: Option<String>,
+	},
+}
+
 /// Processes admin query commands
 pub(super) async fn process(command: QueryCommand, _body: Vec<&str>) -> Result<RoomMessageEventContent> {
 	Ok(match command {
@@ -298,5 +318,6 @@ pub(super) async fn process(command: QueryCommand, _body: Vec<&str>) -> Result<R
 		QueryCommand::Globals(command) => globals(command).await?,
 		QueryCommand::Sending(command) => sending(command).await?,
 		QueryCommand::Users(command) => users(command).await?,
+		QueryCommand::Resolver(command) => resolver(command).await?,
 	})
 }

src/admin/query/resolver.rs

@@ -0,0 +1,87 @@
+use std::fmt::Write;
+
+use conduit::{utils::time, Result};
+use ruma::{events::room::message::RoomMessageEventContent, OwnedServerName};
+
+use super::Resolver;
+use crate::services;
+
+/// All the getters and iterators in key_value/users.rs
+pub(super) async fn resolver(subcommand: Resolver) -> Result<RoomMessageEventContent> {
+	match subcommand {
+		Resolver::DestinationsCache {
+			server_name,
+		} => destinations_cache(server_name).await,
+		Resolver::OverridesCache {
+			name,
+		} => overrides_cache(name).await,
+	}
+}
+
+async fn destinations_cache(server_name: Option<OwnedServerName>) -> Result<RoomMessageEventContent> {
+	use service::sending::CachedDest;
+
+	let mut out = String::new();
+	writeln!(out, "| Server Name | Destination | Hostname | Expires |")?;
+	writeln!(out, "| ----------- | ----------- | -------- | ------- |")?;
+	let row = |(
+		name,
+		&CachedDest {
+			ref dest,
+			ref host,
+			expire,
+		},
+	)| {
+		let expire = time::format(expire, "%+");
+		writeln!(out, "| {name} | {dest} | {host} | {expire} |").expect("wrote line");
+	};
+
+	let map = services()
+		.globals
+		.resolver
+		.destinations
+		.read()
+		.expect("locked");
+
+	if let Some(server_name) = server_name.as_ref() {
+		map.get_key_value(server_name).map(row);
+	} else {
+		map.iter().for_each(row);
+	}
+
+	Ok(RoomMessageEventContent::notice_markdown(out))
+}
+
+async fn overrides_cache(server_name: Option<String>) -> Result<RoomMessageEventContent> {
+	use service::sending::CachedOverride;
+
+	let mut out = String::new();
+	writeln!(out, "| Server Name | IP  | Port | Expires |")?;
+	writeln!(out, "| ----------- | --- | ----:| ------- |")?;
+	let row = |(
+		name,
+		&CachedOverride {
+			ref ips,
+			port,
+			expire,
+		},
+	)| {
+		let expire = time::format(expire, "%+");
+		writeln!(out, "| {name} | {ips:?} | {port} | {expire} |").expect("wrote line");
+	};
+
+	let map = services()
+		.globals
+		.resolver
+		.overrides
+		.read()
+		.expect("locked");
+
+	if let Some(server_name) = server_name.as_ref() {
+		map.get_key_value(server_name).map(row);
+	} else {
+		map.iter().for_each(row);
+	}
+
+	Ok(RoomMessageEventContent::notice_markdown(out))
+}