Convert legacy Bard Text Align mark values to Tiptap 2 text align values

AppServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    public function register()
    {
        $this->app->bind(\Statamic\Fieldtypes\Bard::class, \App\Fieldtypes\Bard::class);
    }
}

Bard.php

<?php
namespace App\Fieldtypes;

class Bard extends \Statamic\Fieldtypes\Bard
{
    protected function convertLegacyTiptap($value)
    {
        return parent::convertLegacyTiptap($this->convertLegacyTextAlign($value));
    }

    protected function convertLegacyTextAlign($value)
    {
        if (is_string($value)) {
            return $value;
        }

        if (! in_array($value['type'] ?? null, ['heading', 'paragraph'])) {
            return $value;
        }

        $found = null;
        foreach (($value['content'] ?? []) as $i => $node) {
            if (! isset($node['marks'])) {
                continue;
            }
            foreach ($node['marks'] as $j => $mark) {
                if ($mark['type'] === 'textAlign') {
                    unset($value['content'][$i]['marks'][$j]);
                    if (! $found) {
                        $found = $mark;
                    }
                }
            }
            if (! count($value['content'][$i]['marks'])) {
                unset($value['content'][$i]['marks']);
            } else {
                $value['content'][$i]['marks'] = array_values($value['content'][$i]['marks']);
            }
        }
        if (! $found) {
            return $value;
        }

        $value['attrs']['textAlign'] = $found['attrs']['align'];

        return $value;
    }
}

Thanks a lot. I had to add another condition before the foreach ($value['content'] as $i => $node) loop. Otherwise it was throwing Undefined array key "content" in my case as there are a bunch of $values without that key.

if (! array_key_exists('content', $value)) {
    return $value;
}

@MrMooky Ah good spot, I've updated it to handle that.

@jacksleight Just installed this, it appears to working like a champ! Thanks!!!