From e180a472bddaa855e5a0c448c75d15e203a8757c Mon Sep 17 00:00:00 2001
From: David Brown <davidpwbrown@gmail.com>
Date: Fri, 5 Jul 2019 18:30:10 +0100
Subject: [PATCH] npc running off fix

---
 src/npc.cpp     |  8 ++++++--
 src/npcmove.cpp | 19 ++++++++++++++++++-
 src/player.cpp  |  4 ++++
 src/player.h    |  2 +-
 4 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/src/npc.cpp b/src/npc.cpp
index 55be1fc78282b..d3e9e4ee5ca27 100644
--- a/src/npc.cpp
+++ b/src/npc.cpp
@@ -620,6 +620,10 @@ void npc::revert_after_activity()
 {
     mission = previous_mission;
     attitude = previous_attitude;
+    activity = player_activity();
+    current_activity.clear();
+    clear_destination();
+    backlog.clear();
 }
 
 npc_mission npc::get_previous_mission()
@@ -1688,7 +1692,7 @@ bool npc::is_patrolling() const
 
 bool npc::has_player_activity() const
 {
-    return activity && mission == NPC_MISSION_ACTIVITY;
+    return activity && mission == NPC_MISSION_ACTIVITY && attitude == NPCATT_ACTIVITY;
 }
 
 bool npc::is_travelling() const
@@ -2654,7 +2658,7 @@ void npc::set_mission( npc_mission new_mission )
 
 bool npc::has_activity() const
 {
-    return mission == NPC_MISSION_ACTIVITY;
+    return mission == NPC_MISSION_ACTIVITY && attitude == NPCATT_ACTIVITY;
 }
 
 npc_attitude npc::get_attitude() const
diff --git a/src/npcmove.cpp b/src/npcmove.cpp
index 123457f38e21a..4bb42503d289f 100644
--- a/src/npcmove.cpp
+++ b/src/npcmove.cpp
@@ -764,7 +764,12 @@ void npc::move()
     if( action == npc_undecided && attitude == NPCATT_ACTIVITY ) {
         std::vector<tripoint> activity_route = get_auto_move_route();
         if( !activity_route.empty() && !has_destination_activity() ) {
-            const tripoint final_destination = activity_route.back();
+            tripoint final_destination;
+            if( destination_point ) {
+                final_destination = g->m.getlocal( *destination_point );
+            } else {
+                final_destination = activity_route.back();
+            }
             update_path( final_destination );
             if( !path.empty() ) {
                 move_to_next();
@@ -780,6 +785,14 @@ void npc::move()
     }
 
     if( action == npc_undecided ) {
+        // an interrupted activity can cause this situation. stops allied NPCs zooming off like random NPCs
+        if( attitude == NPCATT_ACTIVITY && !activity ) {
+            revert_after_activity();
+            if( is_ally( g->u ) ) {
+                attitude = NPCATT_FOLLOW;
+                mission = NPC_MISSION_NULL;
+            }
+        }
         if( is_stationary( true ) ) {
             // if we're in a vehicle, stay in the vehicle
             if( in_vehicle ) {
@@ -2989,7 +3002,9 @@ bool npc::do_player_activity()
         if( !backlog.empty() ) {
             activity = backlog.front();
             backlog.pop_front();
+            current_activity = activity.get_verb();
         } else {
+            current_activity.clear();
             revert_after_activity();
             // if we loaded after being out of the bubble for a while, we might have more
             // moves than we need, so clear them
@@ -3841,6 +3856,8 @@ std::string npc_action_name( npc_action action )
             return "Avoid friendly fire";
         case npc_escape_explosion:
             return "Escape explosion";
+        case npc_player_activity:
+            return "Performing activity";
         default:
             return "Unnamed action";
     }
diff --git a/src/player.cpp b/src/player.cpp
index 2eeaa2162e21c..eda751165a634 100644
--- a/src/player.cpp
+++ b/src/player.cpp
@@ -10487,6 +10487,10 @@ void player::assign_activity( const player_activity &act, bool allow_resume )
     if( activity.rooted() ) {
         rooted_message();
     }
+    if( is_npc() ) {
+        npc *guy = dynamic_cast<npc *>( this );
+        guy->current_activity = activity.get_verb();
+    }
 }
 
 bool player::has_activity( const activity_id &type ) const
diff --git a/src/player.h b/src/player.h
index bb4284d7f4e4d..d2e3fde638228 100644
--- a/src/player.h
+++ b/src/player.h
@@ -1531,6 +1531,7 @@ class player : public Character
         player_activity activity;
         std::list<player_activity> backlog;
         int volume;
+        cata::optional<tripoint> destination_point;
         const profession *prof;
 
         start_location_id start_location;
@@ -1828,7 +1829,6 @@ class player : public Character
 
         std::vector<tripoint> auto_move_route;
         player_activity destination_activity;
-        cata::optional<tripoint> destination_point;
         // Used to make sure auto move is canceled if we stumble off course
         cata::optional<tripoint> next_expected_position;
         /** warnings from a faction about bad behaviour */