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