//Setting up Woocommerce "Add to Cart" button and adding an additional button for more info.

//Add More Info button and changes it's text to the "Info" Icon.

add_action( 'woocommerce_after_shop_loop_item', 'woocommerce_template_loop_add_to_cart', 20 );
add_action( 'woocommerce_after_shop_loop_item', 'sj_view_product_button', 10 );
function sj_view_product_button() {
global $product;
$link = $product->get_permalink();
echo '<a href="' . $link . '" class="preview-product">&#x72;</a>';
}

//Change the Add to Cart text to basket Icon
add_filter( 'woocommerce_product_add_to_cart_text', 'woocommerce_custom_product_add_to_cart_text' );  
function woocommerce_custom_product_add_to_cart_text() {
    return __( '&#xe013;', 'woocommerce' );
}


//Changes basked icon to tick when product is already in the cart
function change_button_text( $product_id, $button_text ) {
    foreach( WC()->cart->get_cart() as $item ) {
        if( $product_id === $item['product_id'] ) {
            return __('&#x4e;', 'woocommerce');
        }
    }
    return $button_text;
}
add_filter( 'woocommerce_product_add_to_cart_text', 'change_ajax_add_to_cart_button_text', 10, 2 );
function change_ajax_add_to_cart_button_text( $button_text, $product ) {
    if ( $product->is_type('simple') ) {
        $button_text = change_button_text( $product->get_id(), $button_text );
    }
    return $button_text;
}