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378 lines
12 KiB
378 lines
12 KiB
#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# Mitter, a client for Twitter. |
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# Copyright (C) 2007, 2008 The Mitter Contributors |
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# |
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# This program is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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""" |
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.. moduleauthor:: Julio Biason <julio.biason@gmail.com> |
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The :mod:`networkbase` module defines the base classes for all networks. |
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""" |
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import logging |
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import gettext |
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from mitterlib.constants import version |
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# logging |
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_log = logging.getLogger('mitterlib.network.Network') |
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def auth_options(namespace, options, auths): |
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"""Convert the auth fields into options for the command line.""" |
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default_values = { |
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'str': '', |
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'passwd': ''} |
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for option in auths: |
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options.add_option(group=namespace, |
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option=option['name'], |
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default=default_values[option['type']], |
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help=option['help'], |
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*(option['flags'])) |
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#-------------------------------------------------------------------- |
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# i18n |
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#-------------------------------------------------------------------- |
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t = gettext.translation('networks', fallback=True) |
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_ = t.gettext |
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N_ = t.ngettext |
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#-------------------------------------------------------------------- |
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# Exceptions |
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#-------------------------------------------------------------------- |
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class NetworkError(Exception): |
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"""Base class for all network related exceptions.""" |
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pass |
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class NetworkUnknownError(NetworkError): |
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"""Some non-expected error occurred.""" |
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pass |
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class NetworkLimitExceededError(NetworkError): |
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"""The number of requests available was exceeded.""" |
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def __init__(self, network_name): |
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self.name = network_name |
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def __str__(self): |
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return _('No more available requests on %s') % (self.name) |
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pass |
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class NetworkDNSError(NetworkError): |
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"""A DNS failure prevented the request to continue.""" |
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def __init__(self, network_name): |
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self.name = network_name |
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def __str__(self): |
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return _('DNS failure on a request to %s') % (self.name) |
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pass |
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class NetworkInvalidResponseError(NetworkError): |
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"""The server returned the information in an unexpected way.""" |
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def __init__(self, network_name): |
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self.name = network_name |
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def __str__(self): |
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return _('The server on %s return the information in an ' \ |
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'unexpected way.') % (self.name) |
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pass |
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class NetworkLowLevelError(NetworkError): |
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"""A low level error occurred in the network layer.""" |
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def __init__(self, network_name): |
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self.name = network_name |
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def __str__(self): |
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return _('Low level error in the network layer when talking ' \ |
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'to %s') % (self.name) |
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pass |
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class NetworkBadStatusLineError(NetworkError): |
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"""Bad status line exception.""" |
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def __init__(self, network_name): |
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self.name = network_name |
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def __str__(self): |
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return _('Bad status line in network %s') % (self.name) |
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pass |
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class NetworkAuthorizationFailError(NetworkError): |
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"""Authorization failure.""" |
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def __init__(self, network_name): |
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self.name = network_name |
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def __str__(self): |
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return _('Autorization failed for %s') % (self.name) |
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pass |
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class NetworkPermissionDeniedError(NetworkError): |
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"""Permission denied when accessing the message/list.""" |
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def __init__(self, network_name): |
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self.name = network_name |
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def __str__(self): |
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return _('Permission denied received on %s') % (self.name) |
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pass |
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#-------------------------------------------------------------------- |
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# Warnings |
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#-------------------------------------------------------------------- |
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class NetworkWarning(Warning): |
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"""Base warning for networks.""" |
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pass |
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class MessageTooLongWarning(NetworkWarning): |
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"""The message is too long for the network.""" |
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def __init__(self, network_name): |
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self.name = network_name |
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def __str__(self): |
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return _('Message too long for %s') % (self.name) |
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pass |
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#-------------------------------------------------------------------- |
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# The classes |
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#-------------------------------------------------------------------- |
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class NetworkUser(object): |
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"""Provides an uniform way to access information about users.""" |
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def __init__(self): |
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self.name = '' |
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"""The name to be displayed as author of the message. *Required*""" |
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self.username = '' |
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"""The message author username in the network. *Required*""" |
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self.avatar = None |
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"""URL to the author avatar. *Optional*""" |
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def __repr__(self): |
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return "%s (%s)" % (self.name, self.username) |
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class NetworkData(object): |
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"""Provides an uniform way to access information about posts.""" |
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def __init__(self): |
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self.id = '' |
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"""The message identification. *Optional*""" |
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self.author = None |
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"""Author of the message. A :class:`NetworkUser` object. |
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*Required*""" |
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self.message = '' |
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"""The message. *Required*""" |
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self.message_time = None |
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"""Message timestamp (as a datetime object). Defaults to None. |
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*Optional*""" |
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self.favorite = False |
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"""Boolean indicating if the message was marked as "favorite" or not. |
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*Optional*""" |
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self.parent = None |
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"""The parent of this message, in case of a reply. *Optional*""" |
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self.parent_owner = None |
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"""Owner of the parent message (in other words, "in reply to".) |
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It will be a :class:`NetworkUser` object. *Optional*""" |
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self.reposted_by = None |
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"""Author of the reposted message. A :class:`NetworkUser` object. |
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Some networks will return the original |
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user in a separate table (Twitter, in this case, returns the original |
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message with the original user in a "retweeted_status" structure.) In |
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this case, the network layer must return the original user in *author* |
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while the friend will be in *reposted_by*. *Optional*""" |
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self.protected = False |
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"""Boolean indicating if the message is protected/private or not.""" |
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self.deletable = False |
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"""Boolean indicating if the message can be deleted.""" |
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self.replyable = False |
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"""Boolean indicating if the message can be replied.""" |
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self.repostable = False |
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"""Boolean indicating if the message can be reposted.""" |
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self.favoritable = False |
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"""Boolean indicating if the message can be favorited.""" |
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self.link = None |
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"""Link to the original message.""" |
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self.reply_prefix = '' |
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"""Prefix to be used in messages when replying to this message.""" |
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self.user_regexp = None |
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"""Regular expression used to identify usernames in the message. If |
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the network doesn't support an easy way to identify usernames, it |
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should be set to None.""" |
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self.group_regexp = None |
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"""Regular expression used to identify groups in the message. If the |
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network doesn't support groups or doesn't have an easy way to |
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identify groups, it should be set to None.""" |
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self.tag_regexps = None |
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"""Regular expression used to identify tags (hashtags) in the |
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message. If the network doesn't support tags or doesn't have an easy |
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way to identify groups, it should be set no None.""" |
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self.network = '' |
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"""The network id source of the message. Network classes don't need to |
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worry about this field themselves; :class:`Networks` will set it when |
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merging information from all networks.""" |
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self.network_name = '' |
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"""The network name, source of the message. Again, network classes |
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don't need to worry about this field themselves 'cause |
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:class:`Networks` will set it when merging information from all |
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networks.""" |
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return |
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class NetworkBase(object): |
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"""Base class for all networks.""" |
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_user_agent = 'Mitter %s' % (version) |
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# TODO: We'll probably need a ICON attribute in the future. |
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#: Namespace of the network, used to identify options. |
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NAMESPACE = 'Meta' |
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AUTH = [] |
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"""List of fields the interface must request to the user in order to |
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retrieve information from the network. It's a list of dictionaries, |
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containing: |
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*name* |
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Name of the option, used in ConfigOpt (for the name in the |
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config file and to access it through the options variable); |
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*flags* |
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The list of command line options for this option (as in |
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OptParse); |
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*prompt* |
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The prompt to be used by interfaces when requesting the |
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variable; |
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*help* |
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Description for the value; it's used by ConfigOpt to show the |
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description of the paramater in the command line options and can be used |
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by interfaces to show tooltips about the field; |
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*type* |
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The type of the option; valid values are: |
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**str** |
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A string; |
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**passwd** |
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Password; string, but interfaces should hide the information |
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if possible. |
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""" |
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def __init__(self): |
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self.is_setup = False |
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"""Boolean indication if the network have all necessary options set up |
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so it can retrieve the messages. :class:`Networks` will not send |
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requests to networks that return False to this function.""" |
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self.user = NetworkUser() |
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"""A :class:`NetworkUser` with the information about the currently |
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logged user.""" |
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def messages(self): |
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"""Return a list of :class:`NetworkData` objects for the main |
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"timeline" (the default list presented to the user.)""" |
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return [] |
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def update(self, status, reply_to=None): |
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"""Update the user status. *status* should be the string with the |
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status update; *reply_to* should be used in case the message is a |
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reply to another message, it could be a simple id or the |
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:class:`NetworkData` object of the original data. Must return the id |
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for the new status.""" |
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# TODO: All networks will return an id? If so, what we do with it |
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# anyway? |
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return None |
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def repost(self, message): |
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"""Repost a message in your current timeline. *message* must be a |
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valid :class:`NetworkData` object. Must return the id of the new |
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message.""" |
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# TODO: All networks will return an id? If so, what we do with it |
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# anyway? |
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return None |
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def favorite(self, message): |
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"""Toggle the favorite status of a message. *message* must be a valid |
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:class:`NetworkData` object. Returns True if the request was |
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successful or False otherwise.""" |
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# TODO: Again, if errors appear as exceptions, why return something? |
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return False |
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def delete_message(self, message): |
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"""Delete an update. Must return True if the message was deleted or |
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False if not. *message* can be either an id or a :class:`NetworkData` |
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object with the information about the message to be deleted.""" |
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return False |
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def message(self, message_id): |
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"""Return a single :class:`NetworkData` object for a specified |
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message.""" |
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return None |
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def link(self, message): |
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"""Returns a link (as string) to the message in the network site. If |
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the network doesn't provide a link directly to the message, None shall |
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be returned. *message* is a :class:`NetworkData` object.""" |
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return None |
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def replies(self): |
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"""Return a list of :class:`NetworkData` objects for the replies for |
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the user messages.""" |
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return [] |
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def available_requests(self): |
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"""Return the number of requests the user can request before being |
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capped. If such limitation doesn't exist for the network, a negative |
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number should be returned.""" |
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return -1
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