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191 lines (150 loc) · 5.22 KB
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# coding: utf-8
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
import copy
import functools
from datetime import datetime
from datetime import timedelta
import arrow
import six
import iso8601
from werkzeug.local import LocalProxy
import dateutil.tz as tz
import leancloud
from leancloud import operation
__author__ = 'asaka <lan@leancloud.rocks>'
def get_dumpable_types():
return (
leancloud.ACL,
leancloud.File,
leancloud.GeoPoint,
leancloud.Relation,
operation.BaseOp,
)
def encode(value, disallow_objects=False, dump_objects=False):
if isinstance(value, LocalProxy):
value = value._get_current_object()
if isinstance(value, datetime):
tzinfo = value.tzinfo
if tzinfo is None:
tzinfo = tz.tzlocal()
return {
'__type': 'Date',
'iso': arrow.get(value, tzinfo).to('utc').format('YYYY-MM-DDTHH:mm:ss.SSS') + 'Z',
}
if isinstance(value, leancloud.Object):
if disallow_objects:
raise ValueError('leancloud.Object not allowed')
if dump_objects:
return value._dump()
return value._to_pointer()
if isinstance(value, leancloud.File):
if not value.url and not value.id:
raise ValueError('Tried to save an object containing an unsaved file.')
return {
'__type': 'File',
'id': value.id,
'name': value.name,
'url': value.url,
}
if isinstance(value, get_dumpable_types()):
return value.dump()
if isinstance(value, (tuple, list)):
return [encode(x, disallow_objects, dump_objects) for x in value]
if isinstance(value, dict):
return dict([(k, encode(v, disallow_objects, dump_objects)) for k, v in six.iteritems(value)])
return value
def decode(key, value):
if isinstance(value, get_dumpable_types()):
return value
if isinstance(value, (tuple, list)):
return [decode(key, x) for x in value]
if not isinstance(value, dict):
return value
if key == 'ACL':
if isinstance(value, leancloud.ACL):
return value
return leancloud.ACL(value)
if '__type' not in value:
return dict([(k, decode(k, v)) for k, v in six.iteritems(value)])
_type = value['__type']
if _type == 'Pointer':
value = copy.deepcopy(value)
class_name = value['className']
pointer = leancloud.Object.create(class_name)
if 'createdAt' in value:
value.pop('__type')
value.pop('className')
pointer._update_data(value)
else:
pointer._update_data({'objectId': value['objectId']})
return pointer
if _type == 'Object':
value = copy.deepcopy(value)
class_name = value['className']
value.pop('__type')
value.pop('className')
obj = leancloud.Object.create(class_name)
obj._update_data(value)
return obj
if _type == 'Date':
return arrow.get(iso8601.parse_date(value['iso'])).to('local').datetime
if _type == 'GeoPoint':
return leancloud.GeoPoint(latitude=value['latitude'], longitude=value['longitude'])
if _type == 'Relation':
relation = leancloud.Relation(None, key)
relation.target_class_name = value['className']
return relation
if _type == 'File':
f = leancloud.File(value['name'])
meta_data = value.get('metaData')
if meta_data:
f._metadata = meta_data
f._url = value['url']
f.id = value['objectId']
return f
def traverse_object(obj, callback, seen=None):
seen = seen or set()
if isinstance(obj, leancloud.Object):
if obj in seen:
return
seen.add(obj)
traverse_object(obj._attributes, callback, seen)
return callback(obj)
if isinstance(obj, (leancloud.Relation, leancloud.File)):
return callback(obj)
if isinstance(obj, (list, tuple)):
for idx, child in enumerate(obj):
new_child = traverse_object(child, callback, seen)
if new_child:
obj[idx] = new_child
return callback(obj)
if isinstance(obj, dict):
for key, child in six.iteritems(obj):
new_child = traverse_object(child, callback, seen)
if new_child:
obj[key] = new_child
return callback(obj)
return callback(obj)
class throttle(object):
def __init__(self, seconds=0, minutes=0, hours=0):
self.throttle_period = timedelta(
seconds=seconds, minutes=minutes, hours=hours
)
self.time_of_last_call = datetime.min
def __call__(self, fn):
@functools.wraps(fn)
def wrapper(*args, **kwargs):
now = datetime.now()
time_since_last_call = now - self.time_of_last_call
if time_since_last_call > self.throttle_period:
self.time_of_last_call = now
return fn(*args, **kwargs)
return wrapper
class classproperty(object):
def __init__(self, f):
self.f = f
def __get__(self, obj, owner):
return self.f(owner)