correct arithmetic adjustments

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/service/admin/media/media_commands.rs

@@ -144,7 +144,7 @@ pub(crate) async fn delete_list(body: Vec<&str>) -> Result<RoomMessageEventConte
 			.drain(1..body.len().checked_sub(1).unwrap())
 			.collect::<Vec<_>>();
 
-		let mut mxc_deletion_count: u32 = 0;
+		let mut mxc_deletion_count: usize = 0;
 
 		for mxc in mxc_list {
 			debug!("Deleting MXC {mxc} in bulk");

src/service/admin/room/room_commands.rs

@@ -22,7 +22,7 @@ pub(crate) async fn list(_body: Vec<&str>, page: Option<usize>) -> Result<RoomMe
 
 	let rooms = rooms
 		.into_iter()
-		.skip(page.saturating_sub(1) * PAGE_SIZE)
+		.skip(page.saturating_sub(1).saturating_mul(PAGE_SIZE))
 		.take(PAGE_SIZE)
 		.collect::<Vec<_>>();
 

src/service/admin/room/room_directory_commands.rs

@@ -39,7 +39,7 @@ pub(crate) async fn process(command: RoomDirectoryCommand, _body: Vec<&str>) ->
 
 			let rooms = rooms
 				.into_iter()
-				.skip(page.checked_sub(1).unwrap().checked_mul(PAGE_SIZE).unwrap())
+				.skip(page.saturating_sub(1).saturating_mul(PAGE_SIZE))
 				.take(PAGE_SIZE)
 				.collect::<Vec<_>>();
 

src/service/media/mod.rs

@@ -188,7 +188,9 @@ impl Service {
 				Ok(duration) => {
 					debug!("Parsed duration: {:?}", duration);
 					debug!("System time now: {:?}", SystemTime::now());
-					SystemTime::now().checked_sub(duration).unwrap()
+					SystemTime::now().checked_sub(duration).ok_or_else(|| {
+						Error::bad_database("Duration specified is not valid against the current system time")
+					})?
 				},
 				Err(e) => {
 					error!("Failed to parse user-specified time duration: {}", e);