From a5e77c00fed5fa3967afd8dd1b6bed095622eb9e Mon Sep 17 00:00:00 2001
From: gfgtdf <tischpapier@gmail.com>
Date: Sun, 3 Aug 2014 21:08:48 +0200
Subject: [PATCH] implement pre_advance event

pre advance event fires before the user sees the advancement dialog.
Implements fr https://gna.org/bugs/?21464
---
 src/actions/attack.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/actions/attack.cpp b/src/actions/attack.cpp
index c735c499f0c3..86c232ff80d0 100644
--- a/src/actions/attack.cpp
+++ b/src/actions/attack.cpp
@@ -1459,6 +1459,18 @@ void advance_unit_at(const advance_unit_params& params)
 			return;
 		}
 
+		if(params.fire_events_)
+		{
+			LOG_NG << "Firing pre_advance event at " << params.loc_ <<".\n";
+			game_events::fire("pre_advance", params.loc_);
+			//TODO: maybe use id instead of location here ?.
+			u = resources::units->find(params.loc_);
+			if(!unit_helper::will_certainly_advance(u))
+			{
+				LOG_NG << "pre_advance event aborted advancing.\n";
+				return;
+			}
+		}
 		//we don't want to let side 1 decide it during start/prestart.
 		int side_for = resources::gamedata->phase() == game_data::PLAY ? 0: u->side();
 		config selected = mp_sync::get_user_choice("choose",