1 files changed, 78 insertions, 0 deletions
diff --git a/src/shoppingcalculator.cpp b/src/shoppingcalculator.cpp
new file mode 100644
index 0000000..e95624a
--- /dev/null
+++ b/src/shoppingcalculator.cpp
@@ -0,0 +1,78 @@
+/***************************************************************************
+*   Copyright (C) 2003 by Unai Garro                                      *
+*   [email protected]                                          *
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+***************************************************************************/
+#include "shoppingcalculator.h"
+
+#include <kdebug.h>
+
+#include "propertycalculator.h"
+#include "datablocks/elementlist.h"
+#include "datablocks/ingredientlist.h"
+
+#include "backends/recipedb.h"
+
+//NOTE: The code as-is uses the lower value if an ingredient range exists
+//	However, the shopping list is calculated using the upper value
+//	because the values are already adjusted prior to being passed
+//	to these functions
+
+void calculateShopping( const ElementList &recipeList, IngredientList *ingredientList, RecipeDB *db )
+{
+	for ( ElementList::const_iterator recipe_it = recipeList.begin(); recipe_it != recipeList.end(); ++recipe_it ) {
+		Recipe rec;
+		db->loadRecipe( &rec, RecipeDB::Ingredients, ( *recipe_it ).id );
+		sum( ingredientList, &( rec.ingList ), db );
+	}
+}
+
+void sum( IngredientList *totalIngredientList, IngredientList *newIngredientList, RecipeDB *db )
+{
+	for ( IngredientList::const_iterator ing_it = newIngredientList->begin(); ing_it != newIngredientList->end(); ++ing_it ) {
+		IngredientList::iterator pos_it;
+
+		// Find out if ingredient exists in list already
+		int pos = totalIngredientList->find( ( *ing_it ).ingredientID );
+
+		if ( pos >= 0 )  // the ingredient is already listed
+		{
+			pos_it = totalIngredientList->at( pos );
+
+			// Variables to store the new total
+			Ingredient result;
+			bool converted;
+
+			// Do the conversion
+			// try to with this and next in the list until conversion rate is
+			// found or end of list is reached
+			IngredientList::iterator lastpos_it; // for 'backup'
+			do
+			{
+				lastpos_it = pos_it;
+
+				// Try to convert
+				converted = autoConvert( db, *ing_it, *pos_it, result );
+			}
+			while ( ( !converted ) && ( ( ( pos_it = totalIngredientList->find( ++pos_it, ( *ing_it ).ingredientID ) ) ) != totalIngredientList->end() ) );
+
+			// If the conversion was succesful, Set the New Values
+			if ( converted ) {
+				*lastpos_it = result;
+			}
+			else // Otherwise append this ingredient at the end of the list
+			{
+				// Insert ingredient ID in the list
+				totalIngredientList->append( *ing_it );
+			}
+		}
+		else // The ingredient is not in the list, just append
+		{
+			totalIngredientList->append( *ing_it );
+		}
+	}
+}