Proposal: Introduce filters to customize coupon content and email formatting

Hello,

I’ve been exploring ways to make the plugin more flexible for developers, particularly for customizing email content and coupon formatting.

Currently, in /admin/settings.php (lines 197-198), the plugin formats the coupon code and expiration date like this:

$content = str_replace( '{coupon_code}', '<span style="font-size: x-large;">' . strtoupper( $coupon_code ) . '</span>', $content );
$content = str_replace( '{date_expires}', empty( $date_expires ) ? esc_html__( 'never expires', 'woocommerce-lucky-wheel' ) : date_i18n( 'F d, Y', ( $date_expires ) ), $content );

And in /frontend/frontend.php (lines 112-113), a similar hard-coded formatting is applied.

The date formatting (date_i18n( ‘F d, Y’, $date_expires )) does not correspond to my region’s preferred display. I would rather use date_i18n( get_option( ‘date_format’ ), $date_expires ) so that the email respects the site’s date settings.

The coupon code is wrapped in a <span style=”font-size: x-large;”> and converted to uppercase. I don’t necessarily want it in this fixed style; I want to format it myself using the email editor.

After some research, I propose introducing WordPress filters (apply_filters()) so that developers can customize these values in their theme or plugin without modifying the core plugin files. For example:

// Prepare formatted values
$formatted_coupon_code = strtoupper( $coupon_code );
$formatted_date        = empty( $date_expires ) ? esc_html__( 'never expires', 'woocommerce-lucky-wheel' ) : date_i18n( 'F d, Y', $date_expires );

// Apply filters for external customization
$formatted_coupon_code = apply_filters( 'wlwl_format_coupon_code', $formatted_coupon_code, $coupon_code );
$formatted_date        = apply_filters( 'wlwl_format_coupon_date', $formatted_date, $date_expires );

// Replace in content
$content = str_replace( '{coupon_code}', $formatted_coupon_code, $content );
$content = str_replace( '{date_expires}', $formatted_date, $content );

This approach allows developers to:

Change the coupon code styling or add HTML.
Format the expiration date according to site preferences or locale.
Extend the system for other placeholders in the future ({winner_name}, {prize}, etc.) without touching plugin files.

Could you consider adding this functionality in a future update? It would make the plugin much more flexible and developer-friendly.

Thank you for your attention and guidance.

Best regards,
Regis B