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author | jsdelfino <jsdelfino@13f79535-47bb-0310-9956-ffa450edef68> | 2010-12-25 01:49:19 +0000 |
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committer | jsdelfino <jsdelfino@13f79535-47bb-0310-9956-ffa450edef68> | 2010-12-25 01:49:19 +0000 |
commit | dc15dc32bb3348c760ba3643c083af7e0c8e43fe (patch) | |
tree | 2823b9165d5c3a8a1bc96b3d071f86101bb995b4 /sandbox/sebastien/cpp/apr-2/samples/store-cpp/shopping-cart.cpp | |
parent | 088b2e47386078c79781a448e0b6e458ddaae23c (diff) |
Create a sandbox branch to experiment with latest APR.
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1052740 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to '')
-rw-r--r-- | sandbox/sebastien/cpp/apr-2/samples/store-cpp/shopping-cart.cpp | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/sandbox/sebastien/cpp/apr-2/samples/store-cpp/shopping-cart.cpp b/sandbox/sebastien/cpp/apr-2/samples/store-cpp/shopping-cart.cpp new file mode 100644 index 0000000000..738ab2f4c7 --- /dev/null +++ b/sandbox/sebastien/cpp/apr-2/samples/store-cpp/shopping-cart.cpp @@ -0,0 +1,135 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +/* $Rev$ $Date$ */ + +/** + * Shopping cart component implementation. + */ + +#include "string.hpp" +#include "function.hpp" +#include "list.hpp" +#include "value.hpp" +#include "monad.hpp" + +namespace tuscany { +namespace store { + +const string cartId("1234"); + +/** + * Get the shopping cart from the cache. Return an empty + * cart if not found. + */ +const list<value> getcart(const value& id, const lambda<value(const list<value>&)> cache) { + const value cart = cache(mklist<value>("get", mklist<value>(id))); + cerr << "cart value: " << cart << "\n"; + const failable<value> fcart = cart; + cerr << "cart fvalue: " << fcart << "\n"; + cerr << "cart content: " << content(fcart) << "\n"; + cerr << "cart reason: " << reason(fcart) << "\n"; + if (isNil(cart)) + return value(list<value>()); + return (list<value>)cart; +} + +/** + * Post a new item to the cart. Create a new cart if necessary. + */ +const failable<value> post(unused const list<value>& collection, const value& item, const lambda<value(const list<value>&)> cache) { + const value id(mkuuid()); + const list<value> newItem(mklist<value>(car<value>(item), id, caddr<value>(item))); + const list<value> cart(cons<value>(newItem, getcart(cartId, cache))); + cache(mklist<value>("put", mklist<value>(cartId), cart)); + return value(mklist<value>(id)); +} + +/** + * Find an item in the cart. + */ +const value find(const value& id, const list<value>& cart) { + if (isNil(cart)) + return cons<value>(string("Item"), mklist<value>("0", list<value>())); + if (id == cadr<value>(car(cart))) + return car(cart); + return find(id, cdr(cart)); +} + +/** + * Return items from the cart. + */ +const failable<value> get(const list<value>& id, const lambda<value(const list<value>&)> cache) { + if (isNil(id)) + return value(append(mklist<value>(string("Your Cart"), cartId), getcart(cartId, cache))); + return find(car(id), getcart(cartId, cache)); +} + +/** + * Delete items from the cart. + */ +const failable<value> del(const list<value>& id, unused const lambda<value(const list<value>&)> cache) { + if (isNil(id)) + return cache(mklist<value>("delete", mklist<value>(cartId))); + return value(true); +} + +/** + * Return the price of an item. + */ +const double price(const list<value>& item) { + return cadr<value>(assoc<value>("price", caddr(item))); +} + +/** + * Sum the prices of a list of items. + */ +const double sum(const list<value>& items) { + if (isNil(items)) + return 0; + return price(car(items)) + sum(cdr(items)); +} + +/** + * Return the total price of the items in the cart. + */ +const failable<value> total(const lambda<value(const list<value>&)> cache) { + const list<value> cart(getcart(cartId, cache)); + return value(sum(cart)); +} + +} +} + +extern "C" { + +const tuscany::value apply(const tuscany::list<tuscany::value>& params) { + const tuscany::value func(car(params)); + if (func == "post") + return tuscany::store::post(cadr(params), caddr(params), cadddr(params)); + if (func == "get") + return tuscany::store::get(cadr(params), caddr(params)); + if (func == "delete") + return tuscany::store::del(cadr(params), caddr(params)); + if (func == "total") + return tuscany::store::total(cadr(params)); + return tuscany::mkfailure<tuscany::value>(); +} + +} |