README

A bundle to provide progressive web app support for contao.

This bundle is still in beta. Please provide feedback if you use it!

This bundle is using PHP Web Push lib to provide push notifications.

Features

• Create and register manifest file for each page root
• Create and register service worker for each page root
• send custom push notifications from backend
• set an offline fallback page
• Frontend module and content element to subscribe to push notifications
• Install PWA button content element
• Encore Bundle support, including asset precaching
• expandable architecture

Setup

Requirements

• PHP >= 7.4
• Contao >=4.9
• Contao Head Bundle

For web push notifications:

• Composer package "minishlink/web-push": "^8.0" (version 5 to 8 are supported)
• PHP extensions:
  • gmp
  • mbstring
  • curl
  • openssl

Install

1. Install via composer or contao manager

    composer require heimrichhannot/contao-pwa-bundle
   

2. Update your database

First Steps

1. Your page template (typically fe_page.html5) must support Head Bundle. This means it must output at least $this->meta() in head section. See Head Bundle readme for more information
2. If you want to use push notifications, add vapid keys to your config (see Setup -> Vapidkeys)
3. Create an PWA Configuration(Backend -> System -> PWA Configuration)
4. Add the configuration to a page root (in page settings you find a new section "Progressive Web App", select yes and choose your configuration)
   • On saving the page the page manifest and the serviceworker will be generated
5. To provide an option to register to your push notifications, add the Push Subscription Button content element or the push notification popup frontend module to your page.

Push Notifications

VAPID keys

You need to add your server vapid keys to your config file, typical in your project config.yml. If you haven't already vapid keys, you can generate in the PWA Bundle backend (Contao Backend -> System -> PWA Configuration -> Control -> Authentication)

huh_pwa:
  vapid:
    subject: "mailto:test@example.org"
    publicKey: "BPZACSEB_Efa3_e2XdVRm4M3Suga2WnhNs9THpVixfScWicSiA3ZYQ3zCG4Uez3EnbL3q-O2RomlZtYejva642M"
    privateKey: "W0qtmwq0aB47Swmid0uDZyW945p9b5bgv_WmfsmsRHw"

Usage

Regenerate files

You can regenerate all your manifest and service worker files at once from the Pwa Control (Contao Backend -> System -> PWA Configuration -> Control -> Files -> Rebuild files)

There is also an command available: huh:pwa:build

Developers

JS Event

To support custom controls, there are events and event listeners that can be used. All events are dispatched and listen to on document.

Events

Listener

Complete configuration

huh_pwa:
  vapid:
    subject: "mailto:test@example.org"
    publicKey: "BPZACSEB_Efa3_e2XdVRm4M3Suga2WnhNs9THpVixfScWicSiA3ZYQ3zCG4Uez3EnbL3q-O2RomlZtYejva642M"
    privateKey: "W0qtmwq0aB47Swmid0uDZyW945p9b5bgv_WmfsmsRHw"
  push:
    automatic_padding: 2847 # int (payload size in byte (min 0, max 4078)) or boolean (enable/disable)
  manifest_path: '/pwa' # where the manifest files should be located within web folder
  configfile_path: '/pwa' # where the configuration files should be located within web folder

Commands

Add additional head scripts

It is possible to add additional js code to the head section by using the PwaHeadScriptTags object available available as huh.head.tag.pwa.script service. Code added with addScript will be outputted in header section of your page within <script type='text/javascript'> tags.

Polyfills

Todo

• image size config
• support svg icons
• select pages to precache
• customize add to homescreen and push notification notifications