From bfe7480b50adf853ad6e91a37660b8fac5c33363 Mon Sep 17 00:00:00 2001
From: KorGgenT <curtis.r.merrill@gmail.com>
Date: Sat, 21 Sep 2019 22:20:22 -0400
Subject: [PATCH] fix mutations overriding spell level

---
 src/magic.cpp | 15 ++++++++++++++-
 src/magic.h   |  1 +
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/magic.cpp b/src/magic.cpp
index 9bbf563437d4d..c7c41552837b7 100644
--- a/src/magic.cpp
+++ b/src/magic.cpp
@@ -730,6 +730,11 @@ void spell::gain_exp( int nxp )
     experience += nxp;
 }
 
+void spell::set_exp( int nxp )
+{
+    experience = nxp;
+}
+
 std::string spell::energy_string() const
 {
     switch( type->energy_source ) {
@@ -1117,7 +1122,11 @@ void known_magic::deserialize( JsonIn &jsin )
         std::string id = jo.get_string( "id" );
         spell_id sp = spell_id( id );
         int xp = jo.get_int( "xp" );
-        spellbook.emplace( sp, spell( sp, xp ) );
+        if( knows_spell( sp ) ) {
+            spellbook[sp].set_exp( xp );
+        } else {
+            spellbook.emplace( sp, spell( sp, xp ) );
+        }
     }
 }
 
@@ -1152,6 +1161,10 @@ void known_magic::learn_spell( const spell_type *sp, player &p, bool force )
         debugmsg( "Tried to learn invalid spell" );
         return;
     }
+    if( p.magic.knows_spell( sp->id ) ) {
+        // you already know the spell
+        return;
+    }
     spell temp_spell( sp->id );
     if( !temp_spell.is_valid() ) {
         debugmsg( "Tried to learn invalid spell" );
diff --git a/src/magic.h b/src/magic.h
index 5bbdc80ba51d7..e7acc80e94b8a 100644
--- a/src/magic.h
+++ b/src/magic.h
@@ -284,6 +284,7 @@ class spell
         int xp() const;
         // gain some exp
         void gain_exp( int nxp );
+        void set_exp( int nxp );
         // how much xp you get if you successfully cast the spell
         int casting_exp( const player &p ) const;
         // modifier for gaining exp