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# 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.
# App reviews collection implementation
from util import *
from atomutil import *
from sys import debug
# Convert a particular user id to a reviews id
def reviewsid(user):
return ("reviews", user.get(()), "user.reviews")
# Get user reviews from the cache
def getreviews(id, cache):
debug('reviews.py::getreviews::id', id)
val = cache.get(id)
if isNull(val):
return ()
reviews = cdddr(car(val))
if not isNull(reviews) and isList(car(cadr(car(reviews)))):
# Expand list of entries
ereviews = tuple(map(lambda e: cons("'entry", e), cadr(car(reviews))))
debug('reviews.py::getreviews::ereviews', ereviews)
return ereviews
debug('reviews.py::getreviews::reviews', reviews)
return reviews
# Get a review from a user's reviews
def getreview(id, reviews):
if isNull(reviews):
return None
if car(id) == entryid(reviews):
return (car(reviews),)
return getreview(id, cdr(reviews))
# Get reviews from the user's reviews
def get(id, user, cache, apps, ratings):
debug('reviews.py::get::id', id)
if isNull(id):
reviews = ((("'feed", ("'title", "Your Reviews"), ("'id", user.get(()))) + getreviews(reviewsid(user), cache)),)
debug('reviews.py::get::reviews', reviews)
return reviews
# Get the requested app
app = apps.get(id)
if isNull(app):
debug('reviews.py::get', 'app not found', id)
return False
# Get the review
review = getreview(id, getreviews(reviewsid(user), cache))
if isNull(review):
debug('reviews.py::get', 'review not found', id)
# Return a default empty review
return mkentry(car(id), car(id), user.get(()), now(), ())
debug('reviews.py::get::review', review)
return review
# Patch an app ratings
def patchratings(id, user, ratings, oreview, nreview):
patch = ("'patch", ("'old", "0" if isNull(oreview) else cadr(content(oreview))), ("'new", "0" if isNull(nreview) else cadr(content(nreview))))
patchentry = mkentry(car(id), car(id), user.get(()), now(), patch);
debug('reviews.py::patchratings::patchentry', patchentry)
return ratings.patch(id, patchentry)
# Put reviews into the cache
def putreviews(id, reviews, cache):
debug('reviews.py::putreviews::id', id)
debug('reviews.py::putreviews::reviews', reviews)
val = ((("'feed", ("'title", "Your Reviews"), ("'id", cadr(id))) + reviews),)
return cache.put(id, val)
# Put a review into a user's reviews
def putreview(id, review, reviews):
if isNull(reviews):
return review
if car(id) == entryid(reviews):
return cons(car(review), cdr(reviews))
return cons(car(reviews), putreview(id, review, cdr(reviews)))
# Put a review into the user's reviews
def put(id, review, user, cache, apps, ratings):
debug('reviews.py::put::id', id)
debug('reviews.py::put::review', review)
# Get the requested app
app = apps.get(id)
if isNull(app):
debug('reviews.py::put', 'app not found', id)
return False
reviewentry = mkentry(title(review), car(id), user.get(()), now(), content(review))
debug('reviews.py::put::reviewentry', reviewentry)
# Get old review
reviews = getreviews(reviewsid(user), cache)
oreview = getreview(id, reviews)
# Update the user's reviews record
nreviews = putreview(id, reviewentry, reviews)
putreviews(reviewsid(user), nreviews, cache)
# Update the app's ratings
return patchratings(id, user, ratings, oreview, review)
# Delete a review from a reviews record
def deletereview(id, reviews):
if isNull(reviews):
return ()
if car(id) == entryid(reviews):
return cdr(reviews)
return cons(car(reviews), deletereview(id, cdr(reviews)))
# Delete reviews from the user's reviews record
def delete(id, user, cache, apps, ratings):
debug('reviews.py::delete::id', id)
if isNull(id):
return cache.delete(reviewsid(user))
# Get the requested app
app = apps.get(id)
if isNull(app):
debug('reviews.py::delete', 'app not found', id)
return False
# Get the review
reviews = getreviews(reviewsid(user), cache)
review = getreview(id, reviews)
if isNull(review):
debug('reviews.py::delete', 'review not found', id)
return False
# Update the user's reviews record
nreviews = deletereview(id, reviews)
putreviews(reviewsid(user), nreviews, cache)
# Update the app's ratings
return patchratings(id, user, ratings, review, None)
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