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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 icons collection implementation
from StringIO import StringIO
try:
from PIL import Image
except:
Image = None
from base64 import b64encode, b64decode
from urllib import urlopen
from util import *
from atomutil import *
from sys import debug
# Convert an id to an icon id
def iconid(id):
return ("apps", car(id), "app.icon")
# Convert image to a 50x50 PNG image
def to50x50png(url):
debug('icons.py::to50x50png::url', url)
if Image is None:
return url
img = Image.open(StringIO(b64decode(url.split(',')[1])) if url.startswith('data:') else StringIO(urlopen(url).read()))
t = img.resize((50, 50))
obuf = StringIO()
t.save(obuf, 'PNG')
return 'data:image/png;base64,' + b64encode(obuf.getvalue()).replace('\n', '')
# Put an icon
def put(id, icon, user, cache, apps):
debug('icons.py::put::id', id)
debug('icons.py::put::icon', icon)
# Get the requested app
app = apps.get(id)
if isNull(app):
debug('icons.py::put', 'app not found', id)
return False
# Check app author
if author(app) != user.get(()) and user.get(()) != 'admin':
debug('icons.py::put', 'different author', author(app))
return False
# Get image and token from input icon
def image(c):
img = assoc("'image", c)
return None if isNull(img) else to50x50png(cadr(img))
def token(c):
tok = assoc("'token", c)
return None if isNull(tok) else cadr(tok)
img = image(content(icon))
tok = token(content(icon))
# Update the icon
# Put with an upload token
if not isNull(tok):
debug('icons.py::put::token', tok)
# Token alone, store token with existing image, if any
if isNull(img):
eicon = cache.get(iconid(id))
eimg = None if isNull(eicon) else image(content(eicon))
if isNull(eimg):
iconentry = mkentry(title(app), car(id), author(app), now(), ("'icon", ("'token", tok)))
debug('icons.py::put::iconentry', iconentry)
return cache.put(iconid(id), iconentry)
debug('icons.py::put::eimg', eimg)
iconentry = mkentry(title(app), car(id), author(app), now(), ("'icon", ("'image", eimg), ("'token", tok)))
debug('icons.py::put::iconentry', iconentry)
return cache.put(iconid(id), iconentry)
# Token plus image, put image if token is valid, removing the token
debug('icons.py::put::img', img)
eicon = cache.get(iconid(id))
etok = None if isNull(eicon) else token(content(eicon))
debug('icons.py::put::etok', etok)
if isNull(etok) or tok != etok:
debug('icons.py::put', 'invalid token', tok)
return False
iconentry = mkentry(title(app), car(id), author(app), now(), ("'icon", ("'image", img)))
debug('icons.py::put::iconentry', iconentry)
return cache.put(iconid(id), iconentry)
# Update icon image
if not isNull(img):
debug('icons.py::put::img', img)
iconentry = mkentry(title(app), car(id), author(app), now(), ("'icon", ("'image", img)))
debug('icons.py::put::iconentry', iconentry)
rc = cache.put(iconid(id), iconentry)
if rc == False:
return False
# Update the app's updated date
return apps.put(id, app)
# Put default empty icon
iconentry = mkentry(title(app), car(id), author(app), now(), ())
debug('icons.py::put::iconentry', iconentry)
rc = cache.put(iconid(id), iconentry)
if rc == False:
return False
# Update the app's updated date
return apps.put(id, app)
# Get an icon
def get(id, user, cache, apps):
debug('icons.py::get::id', id)
if isNull(id):
return (("'feed", ("'title", "Icons"), ("'id", "icons")),)
# Get the requested app
app = apps.get(id)
if isNull(app):
debug('icons.py::get', 'app not found', id)
# Return a default new icon
return mkentry(car(id), car(id), user.get(()), now(), ())
# Get the requested icon
icon = cache.get(iconid(id))
if isNull(icon):
debug('icons.py::get', 'icon not found', id)
# Return a default new icon
return mkentry(title(app), car(id), author(app), now(), ())
# Get image, token, and updated date from icon
def image(c):
img = assoc("'image", c)
return None if isNull(img) else cadr(img)
def token(c):
tok = assoc("'token", c)
return None if isNull(tok) else cadr(tok)
img = image(content(icon))
tok = token(content(icon))
# Return the icon
iconc = (() if isNull(img) else (("'image", img),)) + (() if isNull(tok) or (user.get(()) != author(app) and user.get(()) != 'admin') else (("'token", tok),))
if isNull(iconc):
iconentry = mkentry(title(app), car(id), author(app), updated(icon), ())
debug('icons.py::get::iconentry', iconentry)
return iconentry
iconentry = mkentry(title(app), car(id), author(app), updated(icon), ("'icon",) + iconc)
debug('icons.py::get::iconentry', iconentry)
return iconentry
# Delete an icon
def delete(id, user, cache, apps):
debug('icons.py::delete::id', id)
# Get the requested app
app = apps.get(id)
if isNull(app):
debug('icons.py::delete', 'app not found', id)
return False
# Check app author
if author(app) != user.get(()):
debug('icons.py::delete', 'different author', author(app))
return False
# Delete the icon
rc = cache.delete(iconid(id))
if rc == False:
return False
# Update the app's updated date
return apps.put(id, app)
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