1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
##
# Copyright (C) 2013 Jessica T. (Tsyesika) <xray7224@googlemail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
##
from pypump.compatability import *
from pypump.exception import PyPumpException
from pypump.models import AbstractModel
class InfiniteFeed(object):
previous = None
def __init__(self, feed, offset=None, count=20, stop=None, step=1):
self.feed = feed
self.count = count
self.maxcount = 200 # upper API limit for requested items
self.offset = offset
self.cache = list()
self.counter = 0
self.stop = stop
self.step = step
def __iter__(self):
return self
def next(self):
if not self.cache:
if self.previous is None:
# first iteration
response = self.feed._request(count=self.count, offset=self.offset)
else:
response = self.feed._request(count=self.count, before=self.previous)
self.cache = response['items']
data = self.cache.pop(0) if self.cache else None
if not data or (self.stop and self.counter >= self.stop):
# we're done
raise StopIteration
if self.counter > self.count:
# raise count if we iterate a lot
if self.counter < self.maxcount:
self.count = self.counter
else:
self.count = self.maxcount
obj = getattr(self.feed._pump, self.feed.OBJECT_TYPES)
obj = obj.unserialize(data)
self.previous = obj.id
self.counter += 1
if (self.counter-1) % self.step == 0:
return obj
else:
return self.next()
@implement_to_string
class Feed(AbstractModel):
_count = None
_offset = None
actor = None
author = actor
_ENDPOINT = None
@property
def ENDPOINT(self):
if self._ENDPOINT is None:
raise NotImplemented("Definition of the ENDPOINT must be done by subclass")
return self._ENDPOINT
@property
def major(self):
endpoint = self.ENDPOINT
if not endpoint.endswith("/"):
endpoint += "/"
endpoint += "major"
return self.__class__(username=self.actor, endpoint=endpoint)
@property
def minor(self):
endpoint = self.ENDPOINT
if not endpoint.endswith("/"):
endpoint += "/"
endpoint += "minor"
return self.__class__(username=self.actor, endpoint=endpoint)
def __init__(self, username=None, endpoint=None):
if endpoint is not None:
self._ENDPOINT = endpoint
if isinstance(username, self._pump.Person):
self.actor = username
return
self.actor = self._pump.Person(username)
def __getitem__(self, key):
""" Adds Feed[<feed>] """
if isinstance(key, slice):
return self.__getslice__(key)
count = 1
offset = key
inf = InfiniteFeed(self, offset=offset, count=count, stop=count)
return inf.next()
def __getslice__(self, s, e=None):
""" Grab multiple items from feed """
if type(s) is not slice:
s = slice(s,e)
if s.start and s.stop:
count = s.stop - s.start
offset = s.start
elif s.stop:
count = s.stop
offset = None
elif s.start:
offset = s.start
count = None
if s.step:
step = s.step
else:
step = 1
return InfiniteFeed(self, offset=offset, stop=count, step=step)
def __iter__(self):
""" Produces an iterator """
return InfiniteFeed(self)
def __repr__(self):
if self.author:
return "<{type}: {actor}>".format(
actor=self.actor,
type=self.TYPE,
)
else:
return "<{type}>".format(type=self.TYPE)
def __str__(self):
return str(repr(self))
def _request(self, offset=None, count=None, since=None, before=None):
""" Makes a request """
param = dict()
if count is not None:
param["count"] = count
if offset is not None:
param["offset"] = offset
if since is not None:
param["since"] = before
elif before is not None:
param["before"] = before
if self.actor is None:
# oh dear, we gotta raise an error
raise PyPumpException("No actor defined on {feed}".format(feed=self))
data = self._pump.request(self.ENDPOINT, params=param)
return data
@classmethod
def unserialize(cls, data, user=None):
""" Produce a List from JOSN data """
if type(data) == list:
items = data
elif type(data) == dict:
items = data["items"]
else:
raise Exception("Unknown type: {type} ('{data}')".format(
type=type(data),
data=data
))
unserialized_items = list()
for v in items:
# do we know about it?
obj_type = cls.OBJECT_TYPES
# todo: make less hacky
try:
obj = getattr(cls._pump, obj_type)
except AttributeError:
continue # what is this stange type of which you are?
try:
real_obj = obj.unserialize(v)
if real_obj is not None:
unserialized_items.append(real_obj)
except TypeError:
pass
return unserialized_items
|
