/* === RDA add-on: auto-insert live-price shortcodes in title & body === */
if (!function_exists('rda_amz_extract_asin_from_content')) {
    function rda_amz_extract_asin_from_content($content){
        if (!is_string($content)) return '';
        if (preg_match('/data-asin=["\\\']([A-Z0-9]{8,16})["\\\']/i', $content, $m)) {
            return $m[1];
        }
        // Try common ASIN meta if present
        $post_id = get_the_ID();
        if ($post_id){
            $meta = get_post_meta($post_id, '_rda_amz_asin', true);
            if (!empty($meta)) return $meta;
        }
        return '';
    }

    // Replace static price text inside our deal paragraph with shortcodes
    function rda_amz_autoshortcodes_content($html){
        if (!is_string($html) || stripos($html, 'rda-amz') === false) return $html;
        $asin = rda_amz_extract_asin_from_content($html);
        if (!$asin) return $html;

        // Replace "only $123.45" and "(reg $123.45)" patterns inside the rda-amz-found paragraph
        $html = preg_replace_callback(
            '#(<p[^>]*class=["\\\']rda-amz-found["\\\'][^>]*>)(.*?)(</p>)#is',
            function($m) use ($asin){
                $p1=$m[1]; $txt=$m[2]; $p3=$m[3];
                // only $X → shortcode
                $txt = preg_replace('/only\\s*\\$[0-9\\.,]+/i', 'only [rd_amz_price asin="'.$asin+'"]', $txt, 1);
                // (reg $X) → shortcode
                $txt = preg_replace('/\\(\\s*reg\\s*\\$[0-9\\.,]+\\s*\\)/i', '(reg [rd_amz_list asin="'.$asin.'"])', $txt, 1);
                // If no reg portion exists, append live reg after price once
                if (strpos($txt, 'rd_amz_list') === false && strpos($txt, 'rd_amz_price') !== false){
                    $txt .= ' (reg [rd_amz_list asin="'.$asin.'"])';
                }
                return $p1.$txt.$p3;
            },
            $html
        );
        return $html;
    }
    add_filter('the_content', 'rda_amz_autoshortcodes_content', 8);

    // Ensure shortcodes run in title
    add_filter('the_title', 'do_shortcode', 9);

    // Replace static price in title with shortcodes using the first ASIN found in content
    function rda_amz_autoshortcodes_title($title, $post_id){
        if (!is_singular() && !is_admin()) return $title;
        $post = get_post($post_id);
        if (!$post) return $title;
        $asin = rda_amz_extract_asin_from_content($post->post_content);
        if (!$asin) return $title;

        $new = $title;
        // Replace first $price in title with shortcode
        $replaced = 0;
        $new = preg_replace('/\\$[0-9\\.,]+/', '[rd_amz_price asin="'.$asin.'"]', $new, 1, $replaced);
        if ($replaced === 0) {
            // If no $ found, append price
            $new .= ' — [rd_amz_price asin="'.$asin.'"]';
        }
        // Handle (reg $...)
        if (preg_match('/\\(\\s*reg\\s*\\$[0-9\\.,]+\\s*\\)/i', $new)) {
            $new = preg_replace('/\\(\\s*reg\\s*\\$[0-9\\.,]+\\s*\\)/i', '(reg [rd_amz_list asin="'.$asin.'"])', $new, 1);
        } else {
            $new .= ' (reg [rd_amz_list asin="'.$asin.'"])';
        }
        return $new;
    }
    add_filter('the_title', 'rda_amz_autoshortcodes_title', 8, 2);
}
/* === /RDA add-on === */
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