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SwampDragon notifications

Project Description

# SwampDragon notifications

[ ![Codeship Status for jonashagstedt/swampdragon-notifications](](

Notify your users in real time.

**Note** Since notifications isn't always an essential part of a system, only signed in users receive notifications.

# Prerequisites

* Redis 2.8+

# Installation

pip install swampdragon-notifications

Add the following to `INSTALLED_APPS`:


Set the SwampDragon connection to:

SWAMP_DRAGON_CONNECTION = ('swampdragon_notifications.notification_connection.Connection', '/data')

# Setup

{% load swampdragon_tags static %}
<!-- Swamp dragon -->
{% swampdragon_settings %}
<script type="text/javascript" src="{% static 'swampdragon/js/dist/swampdragon.min.js' %}"></script>

<!-- Swamp dragon notifications -->
<script type="text/javascript" src="{% static 'js/dist/swampdragon-notifications.js' %}"></script>

# JavaScript API

## Get number of users online:

notifications.onlineCount(function (count) {

## User count onChange event:

Triggered when a new user comes online or someone goes offline

notifications.onlineCountChange(function (count) {

## Desktop notifications

To enable desktop notifications: `notifications.enableDesktopNotifications();`.

To disable desktop notifications: `notifications.disableDesktopNotifications();`.

To trigger a desktop notifications:

var payload = {
icon: notification.icon // assuming an icon url is available,
tag: 'foo'
notifications.desktopNotification('New foo', payload);

# Example setup (

The following example setup will send both email notifications and realtime notifications.
To disable the email notifications: remove `'swampdragon_notifications.backends.realtime_notifications.RealtimeNotification'` from `SWAMP_DRAGON_NOTIFICATION_BACKENDS`.


'foo': {
'processor': 'app.subject_renderer.foo_to_dict',
'icon': ''
'subject': 'A new foo',
'template': 'new_foo_notification'

SWAMP_DRAGON_HEARTBEAT_FREQUENCY = 1000 * 60 * 5 # Five minutes

Create a file called in your project, and add a new function:

def foo_to_dict(notification, **kwargs):
return {

The function `foo_to_dict` should return a dictionary with any data you want to pass on to the client.

## Subject processors

A subject processor belongs to a notification type (defined in `SWAMP_DRAGON_NOTIFICATIONS`).

The processor is a function, and takes a `notification` and `**kwargs` as arguments, and returns a dictionary.

Example processor:

def foo_processor(notification, **kwargs):
return {
'timestamp': now(),
'extra_value:' kwargs.get('extra_value')

## Settings

Enable heart beat if you are using realtime notifications.
This helps keep track on who is online.

SWAMP_DRAGON_HEARTBEAT_FREQUENCY = 1000 * 60 * 5 # Five minutes


To customise notification, add `SWAMP_DRAGON_NOTIFICATIONS` to settings.
This is a dictionary:

'foo': {
'processor': 'app.subject_renderer.foo_to_dict'
'template': 'standard_email', # Only used by email backend,
'subject': 'Dear {}, you have a new notification', # Only used by email backend
'title': 'Notification',
'icon': ''

`template` and `subject` only concern the default email backend.

### Notification backends

There are two notification backends: email and realtime.

Set notification backends:

('realtime', 'swampdragon_notifications.backends.realtime_notifications.RealtimeNotification'),
('email', 'swampdragon_notifications.backends.email_notifications.EmailNotification'),

`'swampdragon_notifications.backends.realtime_notifications.RealtimeNotification'` is enabled by default.

### Email notification backend

The emails will, by default, be sent from `settings.SERVER_EMAIL`.
To change the sender email address specify `NOTIFICATION_SENDER` in settings.

#### Creating a custom notification backend

Add a new file to your project ``.

Add a class `FooNotificationBackend`

implement the function `def notify(notification):` in your custom notification backend

from swampdragon_notifications.backends.base_backend import BaseBackend

class FooNotificationBackend(BaseBackend):
def notify(self, notification):

3. Add the new backend to your settings

('foo', 'myproj.foo_notification_backend.FooNotificationBackend'),

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