Growl.py

"""
A Python module that enables posting notifications to the Growl daemon.
See <http://growl.info/> for more information.
"""
__version__ = "0.7" 
__author__ = "Mark Rowe <bdash@users.sourceforge.net>"
__copyright__ = "(C) 2003 Mark Rowe <bdash@users.sourceforge.net>. Released under the BSD license."
__contributors__ = ["Ingmar J Stein (Growl Team)", 
                    "Rui Carmo (http://the.taoofmac.com)",
                    "Jeremy Rossi <jeremy@jeremyrossi.com>",
                    "Peter Hosey <http://boredzo.org/> (Growl Team)",
                   ]

import _growl
import types
import struct
import md5
import socket

GROWL_UDP_PORT=9887
GROWL_PROTOCOL_VERSION=1
GROWL_TYPE_REGISTRATION=0
GROWL_TYPE_NOTIFICATION=1

GROWL_APP_NAME="ApplicationName"
GROWL_APP_ICON="ApplicationIcon"
GROWL_NOTIFICATIONS_DEFAULT="DefaultNotifications"
GROWL_NOTIFICATIONS_ALL="AllNotifications"
GROWL_NOTIFICATIONS_USER_SET="AllowedUserNotifications"

GROWL_NOTIFICATION_NAME="NotificationName"
GROWL_NOTIFICATION_TITLE="NotificationTitle"
GROWL_NOTIFICATION_DESCRIPTION="NotificationDescription"
GROWL_NOTIFICATION_ICON="NotificationIcon"
GROWL_NOTIFICATION_APP_ICON="NotificationAppIcon"
GROWL_NOTIFICATION_PRIORITY="NotificationPriority"
        
GROWL_NOTIFICATION_STICKY="NotificationSticky"

GROWL_APP_REGISTRATION="GrowlApplicationRegistrationNotification"
GROWL_APP_REGISTRATION_CONF="GrowlApplicationRegistrationConfirmationNotification"
GROWL_NOTIFICATION="GrowlNotification"
GROWL_SHUTDOWN="GrowlShutdown"
GROWL_PING="Honey, Mind Taking Out The Trash"
GROWL_PONG="What Do You Want From Me, Woman"
GROWL_IS_READY="Lend Me Some Sugar; I Am Your Neighbor!"

    
growlPriority = {"Very Low":-2,"Moderate":-1,"Normal":0,"High":1,"Emergency":2}

class netgrowl:
    """Builds a Growl Network Registration packet.
       Defaults to emulating the command-line growlnotify utility."""

    __notAllowed__ = [GROWL_APP_ICON, GROWL_NOTIFICATION_ICON, GROWL_NOTIFICATION_APP_ICON]

    def __init__(self, hostname, password ):
        self.hostname = hostname
        self.password = password
        self.socket = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)

    def send(self, data):
        self.socket.sendto(data, (self.hostname, GROWL_UDP_PORT))
        
    def PostNotification(self, userInfo):
        if userInfo.has_key(GROWL_NOTIFICATION_PRIORITY):
            priority = userInfo[GROWL_NOTIFICATION_PRIORITY]
        else:
            priority = 0
        if userInfo.has_key(GROWL_NOTIFICATION_STICKY):
            sticky = userInfo[GROWL_NOTIFICATION_STICKY]
        else:
            sticky = False
        data = self.encodeNotify(userInfo[GROWL_APP_NAME],
                                 userInfo[GROWL_NOTIFICATION_NAME],
                                 userInfo[GROWL_NOTIFICATION_TITLE],
                                 userInfo[GROWL_NOTIFICATION_DESCRIPTION],
                                 priority,
                                 sticky)
        return self.send(data)

    def PostRegistration(self, userInfo):
        data = self.encodeRegistration(userInfo[GROWL_APP_NAME],
                                       userInfo[GROWL_NOTIFICATIONS_ALL],
                                       userInfo[GROWL_NOTIFICATIONS_DEFAULT])
        return self.send(data)

    def encodeRegistration(self, application, notifications, defaultNotifications):
        data = struct.pack("!BBH",
                           GROWL_PROTOCOL_VERSION,
                           GROWL_TYPE_REGISTRATION,
                           len(application) )
        data += struct.pack("BB",
                            len(notifications),
                            len(defaultNotifications) )
        data += application
        for i in notifications:
            encoded = i.encode("utf-8")
            data += struct.pack("!H", len(encoded))
            data += encoded
        for i in defaultNotifications:
            data += struct.pack("B", i)
        return self.encodePassword(data)

    def encodeNotify(self, application, notification, title, description,
                     priority = 0, sticky = False):

        application  = application.encode("utf-8")
        notification = notification.encode("utf-8")
        title        = title.encode("utf-8")
        description  = description.encode("utf-8")
        flags = (priority & 0x07) * 2
        if priority < 0: 
            flags |= 0x08
        if sticky: 
            flags = flags | 0x0001
        data = struct.pack("!BBHHHHH",
                           GROWL_PROTOCOL_VERSION,
                           GROWL_TYPE_NOTIFICATION,
                           flags,
                           len(notification),
                           len(title),
                           len(description),
                           len(application) )
        data += notification
        data += title
        data += description
        data += application
        return self.encodePassword(data)

    def encodePassword(self, data):
        checksum = md5.new()
        checksum.update(data)
        if self.password:
           checksum.update(self.password)
        data += checksum.digest()
        return data

class _ImageHook(type):
    def __getattribute__(self, attr):
        global Image
        if Image is self:
            from _growlImage import Image

        return getattr(Image, attr)

class Image(object):
    __metaclass__ = _ImageHook

class _RawImage(object):
    def __init__(self, data):  self.rawImageData = data

class GrowlNotifier(object):
    """
    A class that abstracts the process of registering and posting
    notifications to the Growl daemon.

    You can either pass `applicationName', `notifications',
    `defaultNotifications' and `applicationIcon' to the constructor
    or you may define them as class-level variables in a sub-class.

    `defaultNotifications' is optional, and defaults to the value of
    `notifications'.  `applicationIcon' is also optional but defaults
    to a pointless icon so is better to be specified.
    """

    applicationName = 'GrowlNotifier'
    notifications = []
    defaultNotifications = []
    applicationIcon = None
    _notifyMethod = _growl

    def __init__(self, applicationName=None, notifications=None, defaultNotifications=None, applicationIcon=None, hostname=None, password=None):
        if applicationName:
            self.applicationName = applicationName
        assert(self.applicationName, 'An application name is required.')

        if notifications:
            self.notifications = list(notifications)
        assert(self.notifications, 'A sequence of one or more notification names is required.')

        if defaultNotifications is not None:
            self.defaultNotifications = list(defaultNotifications)
        elif not self.defaultNotifications:
            self.defaultNotifications = list(self.notifications)

        if applicationIcon is not None:
            self.applicationIcon = self._checkIcon(applicationIcon)
        elif self.applicationIcon is not None:
            self.applicationIcon = self._checkIcon(self.applicationIcon)

        if hostname is not None and password is not None:
            self._notifyMethod = netgrowl(hostname, password)
        elif hostname is not None or password is not None:
            raise KeyError, "Hostname and Password are both required for a network notification"

    def _checkIcon(self, data):
        if isinstance(data, str):
            return _RawImage(data)
        else:
            return data

    def register(self):
        if self.applicationIcon is not None:
            self.applicationIcon = self._checkIcon(self.applicationIcon)

        regInfo = {GROWL_APP_NAME: self.applicationName,
                   GROWL_NOTIFICATIONS_ALL: self.notifications,
                   GROWL_NOTIFICATIONS_DEFAULT: self.defaultNotifications,
                   GROWL_APP_ICON:self.applicationIcon,
                  }
        self._notifyMethod.PostRegistration(regInfo)

    def notify(self, noteType, title, description, icon=None, sticky=False, priority=None):
        assert noteType in self.notifications
        notifyInfo = {GROWL_NOTIFICATION_NAME: noteType,
                      GROWL_APP_NAME: self.applicationName,
                      GROWL_NOTIFICATION_TITLE: title,
                      GROWL_NOTIFICATION_DESCRIPTION: description,
                     }
        if sticky:
            notifyInfo[GROWL_NOTIFICATION_STICKY] = 1

        if priority is not None:
            notifyInfo[GROWL_NOTIFICATION_PRIORITY] = priority

        if icon:
            notifyInfo[GROWL_NOTIFICATION_ICON] = self._checkIcon(icon)

        self._notifyMethod.PostNotification(notifyInfo)