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# coding: utf-8
from datetime import datetime
from leancloud.object_ import Object
from leancloud import client
from leancloud import utils
__author__ = 'asaka <lan@leancloud.rocks>'
class Installation(Object):
pass
class Notification(Object):
pass
def send(data, channels=None, push_time=None, expiration_time=None, expiration_interval=None, where=None, cql=None):
"""
发送推送消息。返回结果为此条推送对应的 _Notification 表中的对象，但是如果需要使用其中的数据，需要调用 fetch() 方法将数据同步至本地。
:param channels: 需要推送的频道
:type channels: list or tuple
:param push_time: 推送的时间
:type push_time: datetime
:param expiration_time: 消息过期的绝对日期时间
:type expiration_time: datetime
:param expiration_interval: 消息过期的相对时间，从调用 API 的时间开始算起，单位是秒
:type expiration_interval: int
:param where: 一个查询 _Installation 表的查询条件 JSON 对象
:type where: leancloud.Query
:param cql: 一个查询 _Installation 表的查询条件 CQL 语句
:type cql: basestring
:param data: 推送给设备的具体信息，详情查看 https://leancloud.cn/docs/push_guide.html#消息内容_Data
:rtype: Notification
"""
if push_time and expiration_time:
raise TypeError('Both expiration_time and expiration_time_interval can\'t be set')
params = {
'data': data,
}
if channels:
params['channels'] = channels
if push_time:
params['push_time'] = push_time.isoformat()
if expiration_time:
params['expiration_time'] = expiration_time.isoformat()
if expiration_interval:
params['expiration_interval'] = expiration_interval
if where:
params['where'] = where.dump()
if cql:
params['cql'] = cql
result = utils.response_to_json(client.post('/push', params=params))
notification = Notification.create_without_data(result['objectId'])
return notification