diaspy/models.py

   1 #!/usr/bin/env python3
   2
   3
   4 """This module is only imported in other diaspy modules and
   5 MUST NOT import anything.
   6 """
   7
   8
   9 import json
  10 import re
  11
  12 from diaspy import errors
  13
  14
  15 class Aspect():
  16     """This class represents an aspect.
  17
  18     Class can be initialized by passing either an id and/or name as
  19     parameters.
  20     If both are missing, an exception will be raised.
  21     """
  22     def __init__(self, connection, id=None, name=None):
  23         self._connection = connection
  24         self.id, self.name = id, name
  25         if id and not name:
  26             self.name = self._findname()
  27         elif name and not id:
  28             self.id = self._findid()
  29         elif not id and not name:
  30             raise Exception('Aspect must be initialized with either an id or name')
  31
  32     def _findname(self):
  33         """Finds name for aspect.
  34         """
  35         name = None
  36         aspects = self._connection.getUserInfo()['aspects']
  37         for a in aspects:
  38             if a['id'] == self.id:
  39                 name = a['name']
  40                 break
  41         return name
  42
  43     def _findid(self):
  44         """Finds id for aspect.
  45         """
  46         id = None
  47         aspects = self._connection.getUserInfo()['aspects']
  48         for a in aspects:
  49             if a['name'] == self.name:
  50                 id = a['id']
  51                 break
  52         return id
  53
  54     def _getajax(self):
  55         """Returns HTML returned when editing aspects via web UI.
  56         """
  57         start_regexp = re.compile('<ul +class=["\']contacts["\'] *>')
  58         ajax = self._connection.get('aspects/{0}/edit'.format(self.id)).text
  59
  60         begin = ajax.find(start_regexp.search(ajax).group(0))
  61         end = ajax.find('</ul>')
  62         return ajax[begin:end]
  63
  64     def _extractusernames(self, ajax):
  65         """Extracts usernames and GUIDs from ajax returned by Diaspora*.
  66         Returns list of two-tuples: (guid, diaspora_name).
  67         """
  68         userline_regexp = re.compile('<a href=["\']/people/[a-z0-9]{16,16}["\']>[\w()*@. -]+</a>')
  69         return [(line[17:33], re.escape(line[35:-4])) for line in userline_regexp.findall(ajax)]
  70
  71     def _extractpersonids(self, ajax, usernames):
  72         """Extracts `person_id`s and usernames from ajax and list of usernames.
  73         Returns list of two-tuples: (username, id)
  74         """
  75         personid_regexp = 'alt=["\']{0}["\'] class=["\']avatar["\'] data-person_id=["\'][0-9]+["\']'
  76         personids = [re.compile(personid_regexp.format(name)).search(ajax).group(0) for guid, name in usernames]
  77         for n, line in enumerate(personids):
  78             i, id = -2, ''
  79             while line[i].isdigit():
  80                 id = line[i] + id
  81                 i -= 1
  82             personids[n] = (usernames[n][1], id)
  83         return personids
  84
  85     def _defineusers(self, ajax, personids):
  86         """Gets users contained in this aspect by getting users who have `delete` method.
  87         """
  88         method_regexp = 'data-method="delete" data-person_id="{0}"'
  89         users = []
  90         for name, id in personids:
  91             if re.compile(method_regexp.format(id)).search(ajax): users.append(name)
  92         return users
  93
  94     def _getguids(self, users_in_aspect, usernames):
  95         """Defines users contained in this aspect.
  96         """
  97         guids = []
  98         for guid, name in usernames:
  99             if name in users_in_aspect: guids.append(guid)
 100         return guids
 101
 102     def getUsers(self):
 103         """Returns list of GUIDs of users who are listed in this aspect.
 104         """
 105         ajax = self._getajax()
 106         usernames = self._extractusernames(ajax)
 107         personids = self._extractpersonids(ajax, usernames)
 108         users_in_aspect = self._defineusers(ajax, personids)
 109         return self._getguids(users_in_aspect, usernames)
 110
 111     def addUser(self, user_id):
 112         """Add user to current aspect.
 113
 114         :param user_id: user to add to aspect
 115         :type user_id: int
 116         :returns: JSON from request
 117         """
 118         data = {'authenticity_token': repr(self._connection),
 119                 'aspect_id': self.id,
 120                 'person_id': user_id}
 121
 122         request = self._connection.post('aspect_memberships.json', data=data)
 123
 124         if request.status_code == 400:
 125             raise errors.AspectError('duplicate record, user already exists in aspect: {0}'.format(request.status_code))
 126         elif request.status_code == 404:
 127             raise errors.AspectError('user not found from this pod: {0}'.format(request.status_code))
 128         elif request.status_code != 200:
 129             raise errors.AspectError('wrong status code: {0}'.format(request.status_code))
 130         return request.json()
 131
 132     def removeUser(self, user_id):
 133         """Remove user from current aspect.
 134
 135         :param user_id: user to remove from aspect
 136         :type user: int
 137         """
 138         data = {'authenticity_token': self._connection.get_token(),
 139                 'aspect_id': self.id,
 140                 'person_id': user_id}
 141         request = self.connection.delete('aspect_memberships/{0}.json'.format(self.id), data=data)
 142
 143         if request.status_code != 200:
 144             raise errors.AspectError('cannot remove user from aspect: {0}'.format(request.status_code))
 145         return request.json()
 146
 147
 148 class Notification():
 149     """This class represents single notification.
 150     """
 151     _who_regexp = re.compile(r'/people/[0-9a-z]+" class=\'hovercardable')
 152     _when_regexp = re.compile(r'[0-9]{4,4}(-[0-9]{2,2}){2,2} [0-9]{2,2}(:[0-9]{2,2}){2,2} UTC')
 153     _aboutid_regexp = re.compile(r'/posts/[0-9]+')
 154
 155     def __init__(self, connection, data):
 156         self._connection = connection
 157         self.type = list(data.keys())[0]
 158         self.data = data[self.type]
 159         self.id = self.data['id']
 160         self.unread = self.data['unread']
 161
 162     def __getitem__(self, key):
 163         """Returns a key from notification data.
 164         """
 165         return self.data[key]
 166
 167     def __str__(self):
 168         """Returns notification note.
 169         """
 170         string = re.sub('</?[a-z]+( *[a-z_-]+=["\'][\w():.,!?#@=/\- ]*["\'])* */?>', '', self.data['note_html'])
 171         string = string.strip().split('\n')[0]
 172         while '  ' in string: string = string.replace('  ', ' ')
 173         return string
 174
 175     def __repr__(self):
 176         """Returns notification note with more details.
 177         """
 178         return '{0}: {1}'.format(self.when(), str(self))
 179
 180     def about(self):
 181         """Returns id of post about which the notification is informing.
 182         """
 183         about = self._aboutid_regexp.search(self.data['note_html'])
 184         if about is None: about = self.who()
 185         else: about = int(about.group(0)[7:])
 186         return about
 187
 188     def who(self):
 189         """Returns list of guids of the users who caused you to get the notification.
 190         """
 191         return [who[8:24] for who in self._who_regexp.findall(self.data['note_html'])]
 192
 193     def when(self):
 194         """Returns UTC time as found in note_html.
 195         """
 196         return self._when_regexp.search(self.data['note_html']).group(0)
 197
 198     def mark(self, unread=False):
 199         """Marks notification to read/unread.
 200         Marks notification to read if `unread` is False.
 201         Marks notification to unread if `unread` is True.
 202
 203         :param unread: which state set for notification
 204         :type unread: bool
 205         """
 206         headers = {'x-csrf-token': repr(self._connection)}
 207         params = {'set_unread': json.dumps(unread)}
 208         self._connection.put('notifications/{0}'.format(self['id']), params=params, headers=headers)
 209         self.data['unread'] = unread
 210
 211
 212 class Comment():
 213     """Represents comment on post.
 214
 215     Does not require Connection() object. Note that you should not manually
 216     create `Comment()` objects -- they are designed to be created automatically
 217     by `Post()` objects.
 218     """
 219     def __init__(self, data):
 220         self.data = data
 221
 222     def __str__(self):
 223         """Returns comment's text.
 224         """
 225         return self.data['text']
 226
 227     def __repr__(self):
 228         """Returns comments text and author.
 229         Format: AUTHOR (AUTHOR'S GUID): COMMENT
 230         """
 231         return '{0} ({1}): {2}'.format(self.author(), self.author('guid'), str(self))
 232
 233     def when(self):
 234         """Returns time when the comment had been created.
 235         """
 236         return self.data['created_at']
 237
 238     def author(self, key='name'):
 239         """Returns author of the comment.
 240         """
 241         return self.data['author'][key]
 242
 243
 244 class Post():
 245     """This class represents a post.
 246
 247     .. note::
 248         Remember that you need to have access to the post.
 249     """
 250     def __init__(self, connection, id, fetch=True, comments=True):
 251         """
 252         :param id: id or guid of the post
 253         :type id: str
 254         :param connection: connection object used to authenticate
 255         :type connection: connection.Connection
 256         :param fetch: defines whether to fetch post's data or not
 257         :type fetch: bool
 258         :param comments: defines whether to fetch post's comments or not
 259         :type comments: bool
 260         """
 261         self._connection = connection
 262         self.id = id
 263         self.data = {}
 264         self.comments = []
 265         if fetch: self._fetchdata()
 266         if comments: self._fetchcomments()
 267
 268     def __repr__(self):
 269         """Returns string containing more information then str().
 270         """
 271         return '{0} ({1}): {2}'.format(self.data['author']['name'], self.data['author']['guid'], self.data['text'])
 272
 273     def __str__(self):
 274         """Returns text of a post.
 275         """
 276         return self.data['text']
 277
 278     def _fetchdata(self):
 279         """This function retrieves data of the post.
 280         """
 281         request = self._connection.get('posts/{0}.json'.format(self.id))
 282         if request.status_code != 200:
 283             raise errors.PostError('{0}: could not fetch data for post: {1}'.format(request.status_code, self.id))
 284         else:
 285             self.data = request.json()
 286
 287     def _fetchcomments(self):
 288         """Retireves comments for this post.
 289         """
 290         request = self._connection.get('posts/{0}/comments.json'.format(self.id))
 291         if request.status_code != 200:
 292             raise errors.PostError('{0}: could not fetch comments for post: {1}'.format(request.status_code, self.id))
 293         else:
 294             self.comments = [Comment(c) for c in request.json()]
 295
 296     def update(self):
 297         """Updates post data.
 298         """
 299         self._fetchdata()
 300         self._fetchcomments()
 301
 302     def like(self):
 303         """This function likes a post.
 304         It abstracts the 'Like' functionality.
 305
 306         :returns: dict -- json formatted like object.
 307         """
 308         data = {'authenticity_token': repr(self._connection)}
 309
 310         request = self._connection.post('posts/{0}/likes'.format(self.id),
 311                                   data=data,
 312                                   headers={'accept': 'application/json'})
 313
 314         if request.status_code != 201:
 315             raise errors.PostError('{0}: Post could not be liked.'
 316                             .format(request.status_code))
 317         return request.json()
 318
 319     def reshare(self):
 320         """This function reshares a post
 321         """
 322         data = {'root_guid': self.data['guid'],
 323                 'authenticity_token': repr(self._connection)}
 324
 325         request = self._connection.post('reshares',
 326                                   data=data,
 327                                   headers={'accept': 'application/json'})
 328         if request.status_code != 201:
 329             raise Exception('{0}: Post could not be reshared'.format(request.status_code))
 330         return request.json()
 331
 332     def comment(self, text):
 333         """This function comments on a post
 334
 335         :param text: text to comment.
 336         :type text: str
 337         """
 338         data = {'text': text,
 339                 'authenticity_token': repr(self._connection)}
 340         request = self._connection.post('posts/{0}/comments'.format(self.id),
 341                                   data=data,
 342                                   headers={'accept': 'application/json'})
 343
 344         if request.status_code != 201:
 345             raise Exception('{0}: Comment could not be posted.'
 346                             .format(request.status_code))
 347         return request.json()
 348
 349     def delete(self):
 350         """ This function deletes this post
 351         """
 352         data = {'authenticity_token': repr(self._connection)}
 353         request = self._connection.delete('posts/{0}'.format(self.id),
 354                                     data=data,
 355                                     headers={'accept': 'application/json'})
 356         if request.status_code != 204:
 357             raise errors.PostError('{0}: Post could not be deleted'.format(request.status_code))
 358
 359     def delete_comment(self, comment_id):
 360         """This function removes a comment from a post
 361
 362         :param comment_id: id of the comment to remove.
 363         :type comment_id: str
 364         """
 365         data = {'authenticity_token': repr(self._connection)}
 366         request = self._connection.delete('posts/{0}/comments/{1}'
 367                                     .format(self.id,
 368                                             comment_id),
 369                                     data=data,
 370                                     headers={'accept': 'application/json'})
 371
 372         if request.status_code != 204:
 373             raise errors.PostError('{0}: Comment could not be deleted'
 374                             .format(request.status_code))
 375
 376     def delete_like(self):
 377         """This function removes a like from a post
 378         """
 379         data = {'authenticity_token': self._connection.get_token()}
 380
 381         request = self._connection.delete('posts/{0}/likes/{1}'
 382                                     .format(self.id,
 383                                             self.data['interactions']
 384                                                      ['likes'][0]['id']),
 385                                     data=data)
 386         if request.status_code != 204:
 387             raise errors.PostError('{0}: Like could not be removed.'
 388                             .format(request.status_code))
 389
 390     def author(self, key='name'):
 391         """Returns author of the post.
 392         :param key: all keys available in data['author']
 393         """
 394         return self.data['author'][key]