How to replace a text in a post with another?

MrPowerGamerBR

(I already asked this before: https://discuss.flarum.org/d/1772-replacing-a-string-on-page-render/11 but I never found out the solution, and that post is from January, so I decided to create a new thread)

I think this is a very very very simple thing but I can't figure out how to.

I just want to do something like this:
User writes "Hi everyone!"
After posting, "Hi" changes to "Hello"
If the user edits the post, it will be shown as "Hi everyone!" in the editor, however, after he posts again, "Hi" will be changed to "Hello"

(Like BBCodes, when you write Hi, the shows again if you decide to edit the post)

I want to create a simple censor extension (and then I want to do something more complex), that's why I want to do this.

MrPowerGamerBR

Also...

    /**
     * @param ConfigureFormatter $event
     */
    public function configure(ConfigureFormatter $event)
    {        
        $configurator = $event->configurator;
        $tagName = 'TESTTAG';
        
        $tag = $configurator->tags->add($tagName);

        $configurator->Preg->replace(
            '/!(?<username>\\w+)/',
            '<a href="https://twitter.com/{@username}"><xsl:apply-templates/></a>'
        );
    }

If I use this code, and don't write "!Whatever", it doesn't do anything, however, if I use "!Whatever" (or anything that matches the RegEx) Flarum throws a "Internal Server Exception" (with no error log, sadly)

MrPowerGamerBR

It seems TextFormatter has a Censor plugin, however I tried using it and it didn't affect the post.

Maybe @JoshyPHP knows how to use it.

Davis

MrPowerGamerBR Paste your code in this thread, please.

JoshyPHP

MrPowerGamerBR Plugins do not apply retroactively. If you active the Censor plugin, it'll only censor new posts, not old ones.

MrPowerGamerBR

Davis

FormatPosts.php

<?php 
namespace MrPowerGamerBR\HelloWorld\Listener;

use Flarum\Core\Post\CommentPost;
use Flarum\Event\ConfigureFormatter;
use Flarum\Event\ConfigureFormatterRenderer;
use Flarum\Forum\UrlGenerator;
use Illuminate\Contracts\Events\Dispatcher;

error_reporting(-1);
ini_set('display_errors', 'On');

class FormatPosts
{
    /**
     * @param Dispatcher $events
     */
    public function subscribe(Dispatcher $events)
    {
        $events->listen(ConfigureFormatter::class, [$this, 'configure']);
        // $events->listen(ConfigureFormatterRenderer::class, [$this, 'render']);
    }

    /**
     * @param ConfigureFormatter $event
     */
    public function configure(ConfigureFormatter $event)
    {        
        $event->configurator->Censor->add('apple*');
    }
    
    /**
     * @param ConfigureFormatterRenderer $event
     */
    public function render(ConfigureFormatterRenderer $event)
    {
        // echo "Render";
    }
    
    public static function addId($tag, UserRepository $users)
    {
        return true;
    }
}

bootstrap.php

<?php
use Flarum\Event\PostWillBeSaved;
use Illuminate\Contracts\Events\Dispatcher;
use MrPowerGamerBR\HelloWorld\Listener;
use Illuminate\Contracts\View\Factory;

error_reporting(-1);
ini_set('display_errors', 'On');

return function (Dispatcher $events, Factory $views) {
    $events->subscribe(Listener\FormatPosts::class);
};

MrPowerGamerBR

JoshyPHP I also tried creating a new thread, but it didn't change anything at all.

JoshyPHP

That I wouldn't know about. I've just tried enabling the Censor plugin locally and it worked after reloading the page. You may have to force some cache to be flushed.

I forgot to mention it but the Censor plugin has a standalone helper that you can run in real time when a post is displayed: http://s9etextformatter.readthedocs.io/Plugins/Censor/Standalone/
You'll need to use censorHtml() for that, as the rendered post is HTML.

MrPowerGamerBR

JoshyPHP I will doing that code again, thanks!

Also, how I force the cache to be flushed? (If is the browser cache, I already do CTRL + F5)

Is there an event for editing the text when the post is displayed? Or I need to use TextFormatter? If yes... I need to add the code in render(), right?

JoshyPHP

I don't know how cache expiration works in Flarum. I just reloaded the page a couple of times with F5 until it worked.

I don't know which event would work. I looked through the list and didn't find anything: http://apidocs.flarum.org/0.1.0/php/Flarum/Event.html

@Toby Is there an event that fires after the post has been rendered into HTML?

MrPowerGamerBR

JoshyPHP If there isn't a event for that, it would be a good idea to implement it.

Some forums would want to edit the contents of the post client-side, however they need to use PHP for some checks (Example: Only show external links in a forum if the user is logged in)

MrPowerGamerBR

JoshyPHP

Update

After a lot of testing, I finally got it working!

This is the FormatPosts.php

<?php
namespace MrPowerGamerBR\HelloWorld\Listener;
use Flarum\Event\ConfigureFormatter;
use Illuminate\Contracts\Events\Dispatcher;
class FormatPosts
{
    /**
     * @param Dispatcher $events
     */
    public function subscribe(Dispatcher $events)
    {
        $events->listen(ConfigureFormatter::class, [$this, 'addEmoticons']);
    }
    /**
     * @param ConfigureFormatter $event
     */
    public function addEmoticons(ConfigureFormatter $event)
    {
        $event->configurator->Censor->add('apple*');
        
        // echo "Hello!";
    }
}

Yeah... "addEmoticons", I copied that class from the Emoticons extension.

bootstrap.php

<?php
use Flarum\Event\ScopePostVisibility;
use Illuminate\Contracts\Events\Dispatcher;
use MrPowerGamerBR\HelloWorld\Listener;
use Illuminate\Contracts\View\Factory;

error_reporting(-1);
ini_set('display_errors', 'On');

return function (Dispatcher $events) {
    $events->subscribe(Listener\FormatPosts::class);
};

Thanks to @Davis (on Gitter for showing me the Censor ~~extension~~ plugin) and @JoshyPHP for helping me!

MrPowerGamerBR

@JoshyPHP now magically after learning how to use the Censor I learned how to use the Preg thing...

yay!

EDIT: This thing is way too powerful! Now I can do what I always wanted! Thanks!