Subcommand for working with room descriptions

Create the CommandSetRoomDescription sub command, move the former description
command into it and rename it set, and the delete command.

src/command/set/room/description/delete.rs

@@ -0,0 +1,42 @@
+use std::str::FromStr;
+
+use mio::Token;
+
+use crate::command::CommandSetRoomDescription;
+use crate::database::Db;
+use crate::queue::SendQueue;
+use crate::{try_option_send_error, try_send, try_send_error};
+
+impl CommandSetRoomDescription {
+	/// Set the specified line in the description to the specified text.
+	pub fn dispatch_delete(&self, args: String, token: Token, db: &mut Db) -> SendQueue {
+		// make sure something was provided
+		if args.is_empty() {
+			return SendQueue(vec![(token, "Delete which line?".into(), true)].into());
+		}
+
+		// try and get the line number
+		let line_num: usize = try_send!(
+			token,
+			u8::from_str(&args),
+			"Can't figure out line number from '{}'.",
+			&args
+		)
+		.into();
+
+		// load the player and room
+		let player = try_option_send_error!(token, db.get_connected_player(token));
+		let mut room = try_option_send_error!(token, db.load_room(player.location));
+
+		// make sure description has enough lines
+		if line_num > room.description.len().into() || line_num <= 0 {
+			return SendQueue(vec![(token, "Line doeesn't exist".into(), true)].into());
+		}
+
+		// remove the line and save
+		room.description.remove(line_num-1);
+		let _ = try_send_error!(token, db.save_room(&room));
+
+		SendQueue::ok(token)
+	}
+}

src/command/set/room/description/description.rs

@@ -0,0 +1,39 @@
+use std::default::Default;
+
+use mio::Token;
+use strum_macros::{Display, EnumIter};
+
+use crate::command::Parse;
+use crate::database::Db;
+use crate::queue::SendQueue;
+
+#[derive(Clone, Debug, Display, EnumIter, Eq, Ord, PartialEq, PartialOrd)]
+pub enum CommandSetRoomDescription {
+	Delete,
+	Set,
+	Default,
+}
+
+impl Default for CommandSetRoomDescription {
+	fn default() -> Self {
+		Self::Default
+	}
+}
+
+impl Parse for CommandSetRoomDescription {
+	fn help(&self) -> &str {
+		match self {
+			Self::Delete => "set room description delete LINE :: Delete line LINE from room description",
+			Self::Set => "set room description set LINE DESC :: Set room description line LINE to DESC",
+			Self::Default => "",
+		}
+	}
+
+	fn dispatch_map(&self) -> fn(&Self, String, Token, &mut Db) -> SendQueue {
+		match self {
+			Self::Delete => Self::dispatch_delete,
+			Self::Set => Self::dispatch_set,
+			Self::Default => Self::dispatch_default,
+		}
+	}
+}

src/command/set/room/description/mod.rs

@@ -0,0 +1,7 @@
+mod delete;
+mod description;
+mod set;
+
+pub use delete::*;
+pub use description::*;
+pub use set::*;

src/command/set/room/description/set.rs

@@ -2,23 +2,23 @@ use std::str::FromStr;
 
 use mio::Token;
 
-use crate::command::CommandSetRoom;
+use crate::command::CommandSetRoomDescription;
 use crate::database::Db;
 use crate::queue::SendQueue;
 use crate::{option_send, try_option_send_error, try_send, try_send_error};
 
-impl CommandSetRoom {
+impl CommandSetRoomDescription {
 	/// Set the specified line in the description to the specified text.
-	pub fn dispatch_description(&self, args: String, token: Token, db: &mut Db) -> SendQueue {
-		// parse the arguments
+	pub fn dispatch_set(&self, args: String, token: Token, db: &mut Db) -> SendQueue {
+		// make sure something was provided
 		if args.is_empty() {
 			return SendQueue(
 				vec![(token, "Set what line to what description?".into(), true)].into(),
 			);
 		}
 
+		// parse the arguments
 		let space = option_send!(token, args.find(' '), "Set what line to what description?");
-
 		let mut line_string = args.clone();
 		let mut description = line_string.split_off(space);
 		description.remove(0);

src/command/set/room/room.rs

@@ -3,13 +3,13 @@ use std::default::Default;
 use mio::Token;
 use strum_macros::{Display, EnumIter};
 
-use crate::command::Parse;
+use crate::command::{CommandSetRoomDescription, Parse, ParserError};
 use crate::database::Db;
 use crate::queue::SendQueue;
 
 #[derive(Clone, Debug, Display, EnumIter, Eq, Ord, PartialEq, PartialOrd)]
 pub enum CommandSetRoom {
-	Description,
+	Description(CommandSetRoomDescription),
 	Name,
 	Default,
 }
@@ -23,15 +23,33 @@ impl Default for CommandSetRoom {
 impl Parse for CommandSetRoom {
 	fn help(&self) -> &str {
 		match self {
-			Self::Description => "set room description LINE DESCRIPTION :: Set line LINE of description to DESCRIPTION.",
+			Self::Description(_) => "",
 			Self::Name => "set room name NEW_NAME :: Set room name to NEW_NAME.",
 			Self::Default => "",
 		}
 	}
 
+	fn parse_subcommand(&self, s: String) -> Result<(Self, String), ParserError> {
+		match self {
+			Self::Description(_) => {
+				let (command, args) = CommandSetRoomDescription::parse(s)?;
+				Ok((Self::Description(command), args))
+			},
+			Self::Default => Err(ParserError::Default),
+			_ => Ok((self.clone(), s)),
+		}
+	}
+
+	fn dispatch_map_subcommand(&self, args: String, token: Token, db: &mut Db) -> SendQueue {
+		match self {
+			Self::Description(command) => command.dispatch(command, args, token, db),
+			_ => SendQueue::new(),
+		}
+	}
+
 	fn dispatch_map(&self) -> fn(&Self, String, Token, &mut Db) -> SendQueue {
 		match self {
-			Self::Description => Self::dispatch_description,
+			Self::Description(_) => Self::dispatch_map_subcommand,
 			Self::Name => Self::dispatch_name,
 			Self::Default => Self::dispatch_default,
 		}