From 9da0eaeb4e429187370701047115fbf391acf99a Mon Sep 17 00:00:00 2001
From: Maleclypse <54345792+Maleclypse@users.noreply.github.com>
Date: Mon, 22 Feb 2021 00:21:30 -0600
Subject: [PATCH] Extend/Delete in requirements

---
 src/requirements.cpp | 39 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 36 insertions(+), 3 deletions(-)

diff --git a/src/requirements.cpp b/src/requirements.cpp
index ba5f4a0e712fa..2525158211832 100644
--- a/src/requirements.cpp
+++ b/src/requirements.cpp
@@ -199,7 +199,18 @@ void quality_requirement::load( const JsonValue &value )
     count = quality_data.get_int( "amount", 1 );
     if( count <= 0 ) {
         quality_data.throw_error( "quality amount must be a positive number", "amount" );
-    }
+      } else {
+          if( jo.has_object( "extend" ) ) {
+              JsonObject tmp = jo.get_object( "extend" );
+              tmp.allow_omitted_members();
+              extend_qualities_from_json( tmp, "qualities", def );
+          }
+          if( jo.has_object( "delete" ) ) {
+              JsonObject tmp = jo.get_object( "delete" );
+              tmp.allow_omitted_members();
+              delete_qualities_from_json( tmp, "qualities", def );
+          }
+      }
     // Note: level is not checked, negative values and 0 are allow, see butchering quality.
 }
 
@@ -230,7 +241,18 @@ void tool_comp::load( const JsonValue &value )
     }
     if( count == 0 ) {
         value.throw_error( "tool count must not be 0" );
-    }
+      } else {
+          if( jo.has_object( "extend" ) ) {
+              JsonObject tmp = jo.get_object( "extend" );
+              tmp.allow_omitted_members();
+              extend_qualities_from_json( tmp, "qualities", def );
+          }
+          if( jo.has_object( "delete" ) ) {
+              JsonObject tmp = jo.get_object( "delete" );
+              tmp.allow_omitted_members();
+              delete_qualities_from_json( tmp, "qualities", def );
+          }
+      }
     // Note: negative count means charges (of the tool) should be consumed
 }
 
@@ -287,7 +309,18 @@ void requirement_data::load_obj_list( const JsonArray &jsarr, std::vector< std::
             for( const JsonValue subentry : entry.get_array() ) {
                 choices.push_back( T() );
                 choices.back().load( subentry );
-            }
+              } else {
+                  if( jo.has_object( "extend" ) ) {
+                      JsonObject tmp = jo.get_object( "extend" );
+                      tmp.allow_omitted_members();
+                      extend_qualities_from_json( tmp, "qualities", def );
+                  }
+                  if( jo.has_object( "delete" ) ) {
+                      JsonObject tmp = jo.get_object( "delete" );
+                      tmp.allow_omitted_members();
+                      delete_qualities_from_json( tmp, "qualities", def );
+                  }
+              }
             if( !choices.empty() ) {
                 objs.push_back( choices );
             }