Adding Custom Phrases to Ultimate Member Date fields

<?php
/*
Plugin Name: Date to Phrase for Ultimate Member
Plugin URI: https://suiteplugins.com/
Description: Transform dates into phrases on user profiles.
Version: 1.0.0
Author: SuitePlugins
Author URI: https://suiteplugins.com/
*/

class UME_Date_Converter {
    public $name = 'Date Converter';

    public $slug = '';

    public $description = 'Converts dates into phrases on profiles and directory.';

    public function hooks() {
        add_filter( 'um_core_fields_hook', [$this, 'um_core_fields_hook'], 10, 1 );
        add_action( 'um_admin_field_edit_hook_ume_pretty_display', [$this,'um_admin_field_edit_hook'], 10, 1);
        add_filter( 'um_profile_field_filter_hook__date', [$this, 'um_profile_field_filter_hook__date'], 101, 2 );
    }

    /**
     * Add the new field to edit screen
     */
    public function um_core_fields_hook( $fields = array() ) {
        if ( ! empty( $fields['date'] ) ) {
            // The item you want to add
            $newItem = '_ume_pretty_display';

            // Reference to the 'col2' array for easier manipulation
            $col2 = $fields['date']['col2'];

            // Find the position of '_pretty_format'
            $position = array_search('_pretty_format', $col2);

            // Check if '_pretty_format' was found in the array
            if ($position !== false) {
                // Increment position to insert after '_pretty_format'
                $position++;

                // Insert the new item into the 'col2' array at the specified position
                array_splice($col2, $position, 0, $newItem);
            }

            $fields['date']['col2'] = $col2;
        }
        return $fields;
    }

    /**
     * The html field on the edit screen.
     */
    public function um_admin_field_edit_hook( $value = '', $form_id = '', $edit_array = array() ) {
        $defaults = array(
            'profile'   => '',
          );
        
        $value = wp_parse_args( $value, $defaults );
        ?>
        <p><label for="_ume_pretty_display"><?php esc_html_e( 'Formatted display on user profile', 'ultimate-member' ); ?> <?php UM()->tooltip( __( 'Shows the user date in a formatted message like Married for 25 years. I am 32 years old. Enter {value} for date in number format', 'ultimate-member' ) ); ?></label>
            <textarea name="_ume_pretty_display[profile]"><?php echo wp_kses_post( $value['profile'] ); ?></textarea>
        </p>
        <?php
    }

    /**
     * Formatting the display on the frontend.
     */
    public function um_profile_field_filter_hook__date( $value, $data ) {
        if ( ! $value ) {
            return '';
        }

        // Ignore the format if pretty format is set because the date converts to X years old.
        if ( ! empty( $data['pretty_format'] ) ) {
            return $value;
        }

        // If the format is set then we'll convert the date to a number and display the message.
        if ( ! empty( $data['ume_pretty_display']['profile'] ) ) {
            $age = $this->get_age( $value );
            return str_replace( '{value}', $age, $data['ume_pretty_display']['profile'] );
        }

        return $value;
    }

    /**
     * Get date as number.
     *
     * @todo working with timestamps in this function.
     *
     * @param string $then
     *
     * @return string
     */
    public function get_age( $then ) {
        if ( ! $then ) {
            return '';
        }

        $then_ts   = strtotime( $then );
        $then_year = date( 'Y', $then_ts );
        $age       = date( 'Y' ) - $then_year;
        if ( strtotime( '+' . $age . ' years', $then_ts ) > current_time( 'timestamp' ) ) {
            $age--;
        }

        if ( 0 === $age ) {
            return 0;
        }

        // translators: %s: age.
        return $age;
    }
}

$class = new UME_Date_Converter();
$class->hooks();