git.maemo.org Git - hermes/blob - package/src/org/maemo/hermes/engine/facebook/provider.py

   1 from facebook import Facebook, FacebookError
   2 import gnome.gconf
   3 import gtk, hildon
   4 import org.maemo.hermes.engine.provider
   5 import org.maemo.hermes.engine.facebook.service
   6
   7 class Provider(org.maemo.hermes.engine.provider.Provider):
   8     """Facebook provider for Hermes.
   9
  10        This requires two gconf paths to contain Facebook application keys:
  11            /apps/maemo/hermes/facebook_app
  12            /apps/maemo/hermes/facebook_secret
  13
  14        Copyright (c) Andrew Flegg <andrew@bleb.org> 2010.
  15        Released under the Artistic Licence."""
  16
  17     # -----------------------------------------------------------------------
  18     def __init__(self):
  19         """Initialise the provider, and ensure the environment is going to work."""
  20
  21         self._gc = gnome.gconf.client_get_default()
  22         if (self._gc.get_string('/desktop/gnome/url-handlers/http/command') == 'epiphany %s'):
  23             raise Exception('Browser in gconf invalid (see NB#136012). Installation error.')
  24
  25         key_app    = self._gc.get_string('/apps/maemo/hermes/facebook_app')
  26         key_secret = self._gc.get_string('/apps/maemo/hermes/facebook_secret')
  27         if key_app is None or key_secret is None:
  28             raise Exception('No Facebook application keys found. Installation error.')
  29
  30         self.fb = Facebook(key_app, key_secret)
  31         self.fb.desktop = True
  32
  33         if self.fb.session_key is None:
  34             self.fb.session_key = self._gc.get_string('/apps/maemo/hermes/facebook_session_key')
  35             self.fb.secret = self._gc.get_string('/apps/maemo/hermes/facebook_secret_key')
  36             self.fb.uid = self._gc.get_string('/apps/maemo/hermes/facebook_uid')
  37
  38
  39     # -----------------------------------------------------------------------
  40     def get_name(self):
  41         """Return the display name of this service. An icon, of with the lower-case,
  42            all-alphabetic version of this name is expected to be provided."""
  43
  44         return 'Facebook'
  45
  46
  47     # -----------------------------------------------------------------------
  48     def get_account_detail(self):
  49         """Return the email address associated with the user, if available."""
  50
  51         name = self._gc.get_string('/apps/maemo/hermes/facebook_user')
  52         return name and name or _('Pending authorisation')
  53
  54
  55     # -----------------------------------------------------------------------
  56     def has_preferences(self):
  57         """Whether or not this provider has any preferences. If it does not,
  58            open_preferences must NOT be called; as the behaviour is undetermined."""
  59
  60         return True
  61
  62
  63     # -----------------------------------------------------------------------
  64     def open_preferences(self, parent):
  65         """Open the preferences for this provider as a child of the 'parent' widget."""
  66
  67         dialog = gtk.Dialog(self.get_name(), parent)
  68         dialog.add_button(_('Clear'), gtk.RESPONSE_OK)
  69         dialog.add_button(_('Disable'), gtk.RESPONSE_NO)
  70         dialog.add_button(_('Enable'), gtk.RESPONSE_YES)
  71
  72         dialog.vbox.add(gtk.Label(_('Note: authentication via web page')))
  73
  74         checkbox = hildon.CheckButton(gtk.HILDON_SIZE_FINGER_HEIGHT)
  75         checkbox.set_label(_('Create birthday-only contacts'))
  76         checkbox.set_active(self._gc.get_bool('/apps/maemo/hermes/facebook_birthday_only'))
  77         dialog.vbox.add(checkbox)
  78         dialog.vbox.add(gtk.Label(''))
  79
  80         while True:
  81             dialog.show_all()
  82             result = dialog.run()
  83             dialog.hide()
  84             if result == gtk.RESPONSE_CANCEL or result == gtk.RESPONSE_DELETE_EVENT:
  85                 return None
  86             elif result == gtk.RESPONSE_OK:
  87                 self._gc.unset('/apps/maemo/hermes/facebook_session_key')
  88                 self._gc.unset('/apps/maemo/hermes/facebook_secret_key')
  89                 self._gc.unset('/apps/maemo/hermes/facebook_uid')
  90                 self._gc.unset('/apps/maemo/hermes/facebook_user')
  91             else:
  92                 break
  93
  94         self._gc.set_bool('/apps/maemo/hermes/facebook_birthday_only', checkbox.get_active())
  95         return result == gtk.RESPONSE_YES
  96
  97
  98     # -----------------------------------------------------------------------
  99     def service(self, gui_callback):
 100         """Return a service instance."""
 101
 102         self._gui = gui_callback
 103
 104         # Check the available session is still valid...
 105         while True:
 106             try:
 107                 if self.fb.users.getLoggedInUser() and self.fb.session_key:
 108                     break
 109             except FacebookError:
 110                 pass
 111             self._do_fb_login()
 112
 113         return org.maemo.hermes.engine.facebook.service.Service(self.fb)
 114
 115
 116     # -----------------------------------------------------------------------
 117     def _do_fb_login(self):
 118         """Perform authentication against Facebook and store the result in gconf
 119              for later use. Uses the 'need_auth' and 'block_for_auth' methods on
 120              the callback class. The former allows a message to warn the user
 121              about what is about to happen to be shown; the second is to wait
 122              for the user to confirm they have logged in."""
 123         self.fb.session_key = None
 124         self.fb.secret = None
 125         self.fb.uid = None
 126
 127         if self._gui:
 128             self._gui.need_auth()
 129
 130         self.fb.auth.createToken()
 131         self.fb.login()
 132
 133         if self._gui:
 134             self._gui.block_for_auth()
 135
 136         session = self.fb.auth.getSession()
 137         self._gc.set_string('/apps/maemo/hermes/facebook_session_key', session['session_key'])
 138         self._gc.set_string('/apps/maemo/hermes/facebook_secret_key', session['secret'])
 139         self._gc.set_string('/apps/maemo/hermes/facebook_uid', str(session['uid']))
 140
 141         info = self.fb.users.getInfo([self.fb.uid], ['name'])
 142         self._gc.set_string('/apps/maemo/hermes/facebook_user', info[0]['name'])
 143