adminroom: cmds to view room topic and room members

this will be extended more

Signed-off-by: strawberry <[email protected]>

src/admin/room/mod.rs

@@ -7,6 +7,7 @@ use crate::Result;
 pub(crate) mod room_alias_commands;
 pub(crate) mod room_commands;
 pub(crate) mod room_directory_commands;
+pub(crate) mod room_info_commands;
 pub(crate) mod room_moderation_commands;
 
 #[cfg_attr(test, derive(Debug))]
@@ -17,6 +18,10 @@ pub(crate) enum RoomCommand {
 		page: Option<usize>,
 	},
 
+	#[command(subcommand)]
+	/// - View information about a room we know about
+	Info(RoomInfoCommand),
+
 	#[command(subcommand)]
 	/// - Manage moderation of remote or local rooms
 	Moderation(RoomModerationCommand),
@@ -30,6 +35,23 @@ pub(crate) enum RoomCommand {
 	Directory(RoomDirectoryCommand),
 }
 
+#[cfg_attr(test, derive(Debug))]
+#[derive(Subcommand)]
+pub(crate) enum RoomInfoCommand {
+	/// - List joined members in a room
+	ListJoinedMembers {
+		room_id: Box<RoomId>,
+	},
+
+	/// - Displays room topic
+	///
+	/// Room topics can be huge, so this is in its
+	/// own separate command
+	ViewRoomTopic {
+		room_id: Box<RoomId>,
+	},
+}
+
 #[cfg_attr(test, derive(Debug))]
 #[derive(Subcommand)]
 pub(crate) enum RoomAliasCommand {
@@ -147,6 +169,8 @@ pub(crate) enum RoomModerationCommand {
 
 pub(crate) async fn process(command: RoomCommand, body: Vec<&str>) -> Result<RoomMessageEventContent> {
 	Ok(match command {
+		RoomCommand::Info(command) => room_info_commands::process(command, body).await?,
+
 		RoomCommand::Alias(command) => room_alias_commands::process(command, body).await?,
 
 		RoomCommand::Directory(command) => room_directory_commands::process(command, body).await?,

src/admin/room/room_info_commands.rs

@@ -0,0 +1,93 @@
+use std::fmt::Write;
+
+use ruma::{events::room::message::RoomMessageEventContent, RoomId};
+use service::services;
+
+use super::RoomInfoCommand;
+use crate::{escape_html, Result};
+
+pub(crate) async fn process(command: RoomInfoCommand, body: Vec<&str>) -> Result<RoomMessageEventContent> {
+	match command {
+		RoomInfoCommand::ListJoinedMembers {
+			room_id,
+		} => list_joined_members(body, room_id).await,
+		RoomInfoCommand::ViewRoomTopic {
+			room_id,
+		} => view_room_topic(body, room_id).await,
+	}
+}
+
+async fn list_joined_members(_body: Vec<&str>, room_id: Box<RoomId>) -> Result<RoomMessageEventContent> {
+	let room_name = services()
+		.rooms
+		.state_accessor
+		.get_name(&room_id)
+		.ok()
+		.flatten()
+		.unwrap_or_else(|| room_id.to_string());
+
+	let members = services()
+		.rooms
+		.state_cache
+		.room_members(&room_id)
+		.filter_map(Result::ok);
+
+	let member_info = members
+		.into_iter()
+		.map(|user_id| {
+			(
+				user_id.clone(),
+				services()
+					.users
+					.displayname(&user_id)
+					.unwrap_or(None)
+					.unwrap_or_else(|| user_id.to_string()),
+			)
+		})
+		.collect::<Vec<_>>();
+
+	let output_plain = format!(
+		"{} Members in Room \"{}\":\n```\n{}\n```",
+		member_info.len(),
+		room_name,
+		member_info
+			.iter()
+			.map(|(mxid, displayname)| format!("{mxid} | {displayname}"))
+			.collect::<Vec<_>>()
+			.join("\n")
+	);
+
+	let output_html = format!(
+		"<table><caption>{} Members in Room \"{}\" </caption>\n<tr><th>MXID</th>\t<th>Display \
+		 Name</th></tr>\n{}</table>",
+		member_info.len(),
+		room_name,
+		member_info
+			.iter()
+			.fold(String::new(), |mut output, (mxid, displayname)| {
+				writeln!(
+					output,
+					"<tr><td>{}</td>\t<td>{}</td></tr>",
+					mxid,
+					escape_html(displayname.as_ref())
+				)
+				.expect("should be able to write to string buffer");
+				output
+			})
+	);
+
+	Ok(RoomMessageEventContent::text_html(output_plain, output_html))
+}
+
+async fn view_room_topic(_body: Vec<&str>, room_id: Box<RoomId>) -> Result<RoomMessageEventContent> {
+	let Some(room_topic) = services().rooms.state_accessor.get_room_topic(&room_id)? else {
+		return Ok(RoomMessageEventContent::text_plain("Room does not have a room topic set."));
+	};
+
+	let output_html = format!("<p>Room topic:</p>\n<hr>\n{}<hr>", escape_html(&room_topic));
+
+	Ok(RoomMessageEventContent::text_html(
+		format!("Room topic:\n\n```{room_topic}\n```"),
+		output_html,
+	))
+}