From 706825be20c347b0f4aa9ee17544bbd6519cd9b3 Mon Sep 17 00:00:00 2001
From: Condorra <kvox990h@anonaddy.me>
Date: Mon, 23 Oct 2023 22:12:59 +1100
Subject: [PATCH] Add stop command that reverses current action.

---
 .../src/message_handler/user_commands.rs      |  2 +
 .../message_handler/user_commands/movement.rs | 46 ++++++++++++++
 .../src/message_handler/user_commands/stop.rs | 60 +++++++++++++++++++
 3 files changed, 108 insertions(+)
 create mode 100644 blastmud_game/src/message_handler/user_commands/stop.rs

diff --git a/blastmud_game/src/message_handler/user_commands.rs b/blastmud_game/src/message_handler/user_commands.rs
index 3f39b3a..0a07ca5 100644
--- a/blastmud_game/src/message_handler/user_commands.rs
+++ b/blastmud_game/src/message_handler/user_commands.rs
@@ -73,6 +73,7 @@ pub mod sit;
 mod staff_show;
 pub mod stand;
 mod status;
+mod stop;
 mod uninstall;
 pub mod use_cmd;
 mod vacate;
@@ -250,6 +251,7 @@ static REGISTERED_COMMANDS: UserVerbRegistry = phf_map! {
     "stats" => status::VERB,
     "status" => status::VERB,
 
+    "stop" => stop::VERB,
     "uninstall" => uninstall::VERB,
     "use" => use_cmd::VERB,
     "vacate" => vacate::VERB,
diff --git a/blastmud_game/src/message_handler/user_commands/movement.rs b/blastmud_game/src/message_handler/user_commands/movement.rs
index f653d4b..b347d5d 100644
--- a/blastmud_game/src/message_handler/user_commands/movement.rs
+++ b/blastmud_game/src/message_handler/user_commands/movement.rs
@@ -339,6 +339,52 @@ pub async fn handle_fall(trans: &DBTrans, faller: &mut Item, fall_dist: u64) ->
     Ok(descriptor.to_owned())
 }
 
+pub async fn reverse_climb(
+    player: &mut Item,
+    trans: &DBTrans,
+    command: &mut QueueCommand,
+) -> UResult<String> {
+    let command_orig = command.clone();
+    match command {
+        QueueCommand::Movement {
+            direction: ref mut d,
+            ..
+        } => {
+            let loc = player.location.clone();
+            let mut tmp_ctx = QueuedCommandContext {
+                trans,
+                command: &command_orig,
+                item: player,
+            };
+            let (new_loc, _item, climb_opt) = move_to_where(&loc, d, &mut tmp_ctx).await?;
+            if let Some(climb) = climb_opt {
+                if let Some(rev_d) = (*d).reverse() {
+                    *d = rev_d;
+                    player.location = new_loc;
+                    if climb.height > 0 {
+                        player
+                            .active_climb
+                            .as_mut()
+                            .map(|ac| ac.height = climb.height as u64 - ac.height);
+                        Ok("You start climbing back down.\n".to_owned())
+                    } else {
+                        player
+                            .active_climb
+                            .as_mut()
+                            .map(|ac| ac.height = (-climb.height) as u64 - ac.height);
+                        Ok("You start climbing back up.\n".to_owned())
+                    }
+                } else {
+                    user_error("You can't figure out how to climb back.".to_owned())?
+                }
+            } else {
+                user_error("You can't figure out how to climb back.".to_owned())?
+            }
+        }
+        _ => user_error("You can't seem to stop climbing for some reason.".to_owned())?,
+    }
+}
+
 // Returns true if the move is either complete or still in progress.
 // Returns false if the move failed.
 async fn attempt_move_immediate(
diff --git a/blastmud_game/src/message_handler/user_commands/stop.rs b/blastmud_game/src/message_handler/user_commands/stop.rs
new file mode 100644
index 0000000..83935a8
--- /dev/null
+++ b/blastmud_game/src/message_handler/user_commands/stop.rs
@@ -0,0 +1,60 @@
+use super::{
+    get_player_item_or_fail, movement::reverse_climb, user_error, UResult, UserVerb, UserVerbRef,
+    VerbContext,
+};
+use async_trait::async_trait;
+
+pub struct Verb;
+#[async_trait]
+impl UserVerb for Verb {
+    async fn handle(
+        self: &Self,
+        ctx: &mut VerbContext,
+        _verb: &str,
+        _remaining: &str,
+    ) -> UResult<()> {
+        let player_item = get_player_item_or_fail(ctx).await?;
+        if player_item.death_data.is_some() {
+            user_error("You're dead. If you wanted to just stop being dead, I'm afraid it doesn't work like that (although you can try going up to resurrect into a new body). If you wanted to stop doing whatever you were doing when you died, then the good news is that your death already put a stop to it.".to_owned())?;
+        }
+
+        let mut player_item_mut = (*player_item).clone();
+        let mut queue_head = player_item_mut.queue.pop_front();
+
+        if player_item.active_combat.is_some() {
+            // Otherwise, we assume they wanted to stop escaping etc...
+            if queue_head.is_none() {
+                user_error("You can't just stop fighting - either fight to the death or try moving to another room.".to_owned())?;
+            }
+        }
+
+        let mut msg = String::new();
+        if let Some(_active_climb) = player_item_mut.active_climb.as_mut() {
+            if let Some(ref mut queue_head_v) = queue_head {
+                msg.push_str(&reverse_climb(&mut player_item_mut, &ctx.trans, queue_head_v).await?);
+            }
+        }
+        let qlen = player_item_mut.queue.len();
+        if qlen > 0 {
+            msg.push_str(&format!(
+                "You cancel your plans to take {} action{}.\n",
+                qlen,
+                if qlen > 1 { "s" } else { "" },
+            ));
+        } else if msg == "" {
+            user_error("You weren't doing anything that could be stopped.".to_owned())?;
+        }
+
+        player_item_mut.queue = queue_head.clone().into_iter().collect();
+
+        ctx.trans.save_item_model(&player_item_mut).await?;
+
+        ctx.trans
+            .queue_for_session(&ctx.session, Some(&msg))
+            .await?;
+
+        Ok(())
+    }
+}
+static VERB_INT: Verb = Verb;
+pub static VERB: UserVerbRef = &VERB_INT as UserVerbRef;