Require player to have the recipe at all stages in crafting

src/activity_handlers.cpp

@@ -2716,6 +2716,11 @@ void activity_handlers::craft_do_turn( player_activity *act, player *p )
         return;
     }
 
+    if( !p->can_continue_craft( *craft ) ) {
+        p->cancel_activity();
+        return;
+    }
+
     const recipe &rec = craft->get_making();
     const tripoint loc = act->targets.front().where() == item_location::type::character ?
                          tripoint_zero : act->targets.front().position();

src/crafting.cpp

@@ -821,6 +821,11 @@ void player::start_craft( craft_command &command, const tripoint &loc )
 
 void player::complete_craft( item &craft, const tripoint &loc )
 {
+    if( !craft.is_craft() ) {
+        debugmsg( "complete_craft() called on non-craft '%s.'  Aborting.", craft.tname() );
+        return;
+    }
+
     const recipe &making = craft.get_making(); // Which recipe is it?
     const int batch_size = craft.charges;
 
@@ -1085,6 +1090,27 @@ void player::complete_craft( item &craft, const tripoint &loc )
     inv.restack( *this );
 }
 
+bool player::can_continue_craft( const item &craft )
+{
+    if( !craft.is_craft() ) {
+        debugmsg( "complete_craft() called on non-craft '%s.'  Aborting.", craft.tname() );
+        return false;
+    }
+
+    const recipe &rec = craft.get_making();
+    if( has_recipe( &rec, crafting_inventory(), get_crafting_helpers() ) == -1 ) {
+        add_msg_player_or_npc(
+            string_format( _( "You don't know the recipe for the %s and can't continue crafting." ),
+                           rec.result_name() ),
+            string_format( _( "<npcname> doesn't know the recipe for the %s and can't continue crafting." ),
+                           rec.result_name() )
+        );
+        return false;
+    }
+
+    return true;
+}
+
 /* selection of component if a recipe requirement has multiple options (e.g. 'duct tap' or 'welder') */
 comp_selection<item_comp> player::select_item_component( const std::vector<item_comp> &components,
         int batch, inventory &map_inv, bool can_cancel,

src/iexamine.cpp

@@ -4723,6 +4723,10 @@ void iexamine::workbench_internal( player &p, const tripoint &examp,
 
             const item *selected_craft = crafts[amenu2.ret].get_item();
 
+            if( !p.can_continue_craft( *selected_craft ) ) {
+                break;
+            }
+
             p.add_msg_player_or_npc(
                 string_format( pgettext( "in progress craft", "You start working on the %s." ),
                                selected_craft->tname() ),

src/iuse.cpp

@@ -8121,6 +8121,10 @@ int iuse::craft( player *p, item *it, bool, const tripoint & )
         return 0;
     }
 
+    if( !p->can_continue_craft( p->weapon ) ) {
+        return 0;
+    }
+
     p->add_msg_player_or_npc(
         string_format( pgettext( "in progress craft", "You start working on the %s." ), craft_name ),
         string_format( pgettext( "in progress craft", "<npcname> starts working on the %s." ),

src/player.h

@@ -1443,6 +1443,13 @@ class player : public Character
         /** consume components and create an active, in progress craft containing them */
         void start_craft( craft_command &command, const tripoint &loc );
         void complete_craft( item &craft, const tripoint &loc = tripoint_zero );
+        /**
+         * Check if the player meets the requirements to continue the in progress craft and if
+         * unable to continue print messages explaining the reason.
+         * @param craft the currently in progress craft
+         * @return if the craft can be continued
+         */
+        bool can_continue_craft( const item &craft );
         /** Returns nearby NPCs ready and willing to help with crafting. */
         std::vector<npc *> get_crafting_helpers() const;
         int get_num_crafting_helpers( int max ) const;