| # 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. |
| |
| # stores collection implementation |
| from util import * |
| |
| # Convert a particular store tag to a store id |
| def storeid(tag): |
| return ("'" + tag, "'store.apps") |
| |
| # Get a store from the cache |
| def getstore(id, cache): |
| store = cache.get(id) |
| if isNil(store) or store is None: |
| return () |
| return store |
| |
| # Put an app into a store |
| def put(key, app, cache): |
| def putapp(app, store): |
| if isNil(store): |
| return app |
| if cadr(caddr(car(app))) == cadr(caddr(car(store))): |
| return cons(car(app), cdr(store)) |
| return cons(car(store), putapp(app, cdr(store))) |
| |
| tag = car(key) |
| store = putapp(app, getstore(storeid(tag), cache)) |
| cache.put(storeid(tag), store) |
| return True |
| |
| # Get apps from a store |
| def get(key, cache): |
| tag = car(key) |
| id = cdr(key) |
| |
| def findapp(id, store): |
| if isNil(store): |
| return None |
| if car(id) == cadr(caddr(car(store))): |
| return (car(store),) |
| return findapp(id, cdr(store)) |
| |
| if isNil(id): |
| return ((("'feed", ("'title", "App Store"), ("'id", tag)) + getstore(storeid(tag), cache)),) |
| return findapp(id, getstore(storeid(tag), cache)) |
| |
| # Delete apps from a store |
| def delete(key, cache): |
| tag = car(key) |
| id = cdr(key) |
| |
| if isNil(id): |
| return cache.delete(storeid(tag)) |
| |
| def deleteapp(id, store): |
| if isNil(store): |
| return () |
| if car(id) == cadr(caddr(car(store))): |
| return cdr(store) |
| return cons(car(store), deleteapp(id, cdr(store))) |
| |
| store = deleteapp(id, getstore(storeid(tag), cache)) |
| cache.put(storeid(tag), store) |
| return True |
| |