Flarum is incredibly fast, extensible, free and open-source forum software. It has been in development since 2014 and is nearing the end of its beta phase.
In this tutorial, we’ll go through the process of adding a custom field to a user account. This custom field will be settable from a user’s profile page by the user only, but also manually editable by an administrator. The full and final source code of this extension is on GitHub.
🙏 Huge thanks to @askvortsov for review and assistance in doing this The Right Way™.
What We’re Adding
We’ll allow users to add their Web3 address into their profile. A Web3 address is a user’s cryptographic identity in the Web3 ecosystem – the public part of a public-private keypair (like SSH) representing one’s blockchain-compatible account.
Note ℹ: the Web3 ecosystem is a new internet of decentralized hosting, self-owned data, and censorship-resistant communication. For a primer on Web3, please see this 15 minute talk at FOSDEM.
Even if you’re not interested in Web3, this tutorial will be useful. This first part of the tutorial will show you how to build a custom field for a user, and the second part will add the actual Web3 address in a cryptographically secure way.
We assume you have NodeJS installed and on a recent enough version (12.16+ is OK), and Composer available globally. For your sanity, we also recommend using Yarn instead of npm. PHP, MySQL, and other requirements for Flarum are assumed to be present and running properly.
In the examples below, we’re hosting the local Flarum copy at
ubikforum.test, which some screenshots might reflect.
Please also make sure that your forum is in
debug mode by setting the appropriate value in
<?php return array( 'debug' => true, 'database' => // ...
We start a new extension by running the Friends of Flarum boilerplate wizard inside a newly created
packages folder in our local Flarum installation’s root folder:
# cd into your flarum folder mkdir packages & cd packages npx @friendsofflarum/create-flarum-extension web3address
Important ⚠: remember to follow best deployment practices and ignore the
packages folder if you’re pushing this Flarum folder to a repo from which you’re deploying your live version.
Fill out the inputs provided by the wizard:
Note ℹ: you’ll want to set
Admin CSS & JS to
yes if you have plans to work with settings and/or permissions, like letting only some people modify their
web3address attribute or similar. In this case, we don’t need it.
Keep in mind that, due to a bug, the generator doesn’t support numbers in the package name or namespace. As such, it’s best to rename those values after the generation is complete. (For example, you can’t use
web3address as the name, but
blockchain is fine.)
cd packages/web3address cd js yarn && yarn dev
Note ℹ: you’ll want to leave this running in a terminal tab and execute the rest of the commands in another tab. The
dev command activates an always-on task that will occupy the current terminal session.
We then install our newly created extension:
composer config repositories.0 path "packages/*" composer require swader/blockchain @dev
The first line will tell Composer that it should look for packages we install in the
packages subfolder, and, if it doesn’t find them, to default to Packagist.org.
The second line installs our newly created extension. Once it’s in, we can load our forum’s admin interface, activate the extension, and check the console on the forum’s front end for a “Hello world” message. If it’s there, the new extension works.
When building extensions, you’re always extending the raw Flarum underneath. These extensions are defined in your extension’s
extend.php file with various extenders being “categories” of possible extension points you can hook into. We’ll modify this file later.
Keep in mind that the forum itself has an
extend.php file in its root folder as well. This file is useful for minor, root-level extensions that your users can do on your instance of Flarum without having to write a full extension around the functionality. If you want to share what you’ve built with others, or distribute it to alternative copies of Flarum, an extension is the way to go.
extend.php file currently looks like this:
<?php namespace SwaderWeb3Address; use FlarumExtend; return [ (new ExtendFrontend('forum')) ->js(__DIR__ . '/js/dist/forum.js') ->css(__DIR__ . '/resources/less/forum.less'), new ExtendLocales(__DIR__ . '/resources/locale') ];
If you were extending the
admin UI as well, there would be another
Frontend block referencing
admin instead of
forum. As it stands, we’re only adding new JS and styles to the forum’s front end and, optionally, localizing our extension’s UI elements, so these are the parts that get extended.
This file is where we’ll define alternative routes and some listeners, as you’ll see later.
Continue reading Writing a Flarum Extension: Building a Custom Field on SitePoint.