toxygen/src/notifications.py

from PySide import QtGui, QtCore
from util import curr_directory
import wave
import pyaudio


SOUND_NOTIFICATION = {
    'MESSAGE': 0,
    'FRIEND_CONNECTION_STATUS': 1,
    'FILE_TRANSFER': 2
}


def tray_notification(title, text, tray, window):
    """
    Show tray notification and activate window icon
    NOTE: different behaviour on different OS
    :param title: Name of user who sent message or file
    :param text: text of message or file info
    :param tray: ref to tray icon
    :param window: main window
    """
    if QtGui.QSystemTrayIcon.isSystemTrayAvailable():
        if len(text) > 30:
            text = text[:27] + '...'
        tray.showMessage(title, text, QtGui.QSystemTrayIcon.NoIcon, 3000)
        QtGui.QApplication.alert(window, 0)

        def message_clicked():
            window.setWindowState(window.windowState() & ~QtCore.Qt.WindowMinimized | QtCore.Qt.WindowActive)
            window.activateWindow()
        tray.connect(tray, QtCore.SIGNAL("messageClicked()"), message_clicked)


class AudioFile(object):
    chunk = 1024

    def __init__(self, fl):
        self.wf = wave.open(fl, 'rb')
        self.p = pyaudio.PyAudio()
        self.stream = self.p.open(
            format=self.p.get_format_from_width(self.wf.getsampwidth()),
            channels=self.wf.getnchannels(),
            rate=self.wf.getframerate(),
            output=True
        )

    def play(self):
        data = self.wf.readframes(self.chunk)
        while data:
            self.stream.write(data)
            data = self.wf.readframes(self.chunk)

    def close(self):
        self.stream.close()
        self.p.terminate()


def sound_notification(t):
    """
    Plays sound notification
    :param t: type of notification
    """
    if t == SOUND_NOTIFICATION['MESSAGE']:
        f = curr_directory() + '/sounds/message.wav'
    elif t == SOUND_NOTIFICATION['FILE_TRANSFER']:
        f = curr_directory() + '/sounds/file.wav'
    else:
        f = curr_directory() + '/sounds/contact.wav'
    a = AudioFile(f)
    a.play()
    a.close()