public function __construct() {

// get plugin options values

$this->options = get_option('wc_ebs_options');

add_action( 'wp_enqueue_scripts', array( $this, 'wc_ebs_enqueue_scripts' ));

add_action( 'woocommerce_product_options_pricing', array( $this, 'wc_ebs_add_product_option_pricing' ));

add_action( 'woocommerce_process_product_meta', array( $this, 'wc_ebs_add_custom_price_fields_save' ));

add_action( 'woocommerce_before_add_to_cart_button', array( $this, 'wc_ebs_before_add_to_cart_button' ));

add_filter( 'woocommerce_get_price_html', array( $this, 'wc_ebs_add_price_html' ), 10, 2 );

add_action( 'wp_ajax_add_new_price', array( $this, 'wc_ebs_get_new_price' ));

add_action( 'wp_ajax_nopriv_add_new_price', array( $this, 'wc_ebs_get_new_price' ));

add_filter( 'add_to_cart_fragments', array( $this, 'wc_ebs_new_price_fragment' ));

add_filter( 'woocommerce_loop_add_to_cart_link', array($this, 'wc_ebs_custom_loop_add_to_cart' ), 10, 2 );

}

public function wc_ebs_enqueue_scripts() {

global $woocommerce, $post;

// Get page language in order to load Pickadate translation

$site_language = get_bloginfo( 'language' );

$lang = str_replace("-","_", $site_language);

// Load scripts only on product page if "booking" option is checked

$wc_ebs_options = get_post_meta($post->ID, '_booking_option', true);

if ( is_product() && $wc_ebs_options) {

// Concatenated and minified script including datepick.js, legacy.js, picker.js and picker.date.js

wp_enqueue_script( 'datepicker', plugins_url( '/js/pickadate.min.js', __FILE__ ), array('jquery'), '1.0', true);

/*wp_enqueue_script( 'picker', plugins_url( '/js/picker.js', __FILE__ ), array('jquery'), '1.0', true);

wp_enqueue_script( 'picker.date', plugins_url( '/js/picker.date.js', __FILE__ ), array('jquery'), '1.0', true);

wp_enqueue_script( 'legacy', plugins_url( '/js/legacy.js', __FILE__ ), array('jquery'), '1.0', true);

wp_enqueue_script( 'datepick', plugins_url( '/js/datepick.js', __FILE__ ), array('jquery'), '1.0', true);*/

wp_enqueue_script( 'datepicker.language', plugins_url( '/js/translations/' . $lang . '.js', __FILE__ ), array('jquery'), '1.0', true);

wp_register_style( 'picker', plugins_url('/css/default.min.css', __FILE__), true);

wp_enqueue_style( 'picker' );

// wp_enqueue_style( 'picker.date' );

// in javascript, object properties are accessed as ajax_object.ajax_url, ajax_object.we_value

wp_localize_script( 'datepicker', 'ajax_object',

array(

'ajax_url' => admin_url( 'admin-ajax.php' )

)

);

}

}

// Add checkbox to the product admin page

public function wc_ebs_add_product_option_pricing() {

global $woocommerce, $post;

echo '<div class="options_group">';

// Checkbox

woocommerce_wp_checkbox(array(

'id' => '_booking_option',

'class' => 'wc_booking_option checkbox',

'wrapper_class' => 'show_if_simple',

'label' => __( 'Add booking option', 'wc_ebs' )

));

echo '</div>';

}

// Save checkbox value to the product admin page

public function wc_ebs_add_custom_price_fields_save( $post_id ) {

$woocommerce_checkbox = isset( $_POST['_booking_option'] ) ? 'yes' : '';

update_post_meta( $post_id, '_booking_option', $woocommerce_checkbox );

}

// Add custom form to the product page.

public function wc_ebs_before_add_to_cart_button() {

global $woocommerce, $post, $product;

$wc_ebs_options = get_post_meta($post->ID, '_booking_option', true);

if (isset($wc_ebs_options) && $wc_ebs_options) {

if ( $this->options['wc_ebs_info_text_display'] ) {

echo '<p class="woocommerce-info">' . __( $this->options['wc_ebs_info_text'] ) . '</p>';

}

echo '<div class="wc_ebs_errors">' . woocommerce_show_messages() . '</div>

<p>

<label for="start_date">' . __( $this->options['wc_ebs_start_date_text'], 'wc_ebs' ) . ' : </label>

<input type="text" id="start_date" class="datepicker1" data-product_id="' . $product->id . '" data-value="">

</p>

<p>

<label for="end_date">' . __( $this->options['wc_ebs_end_date_text'], 'wc_ebs' ) . ' : </label>

<input type="text" id="end_date" class="datepicker2" data-product_id="' . $product->id . '" data-value="">

</p>';

}

}

// Display base price or new price

public function wc_ebs_add_price_html($content) {

global $woocommerce, $post, $product;

$output = isset($_POST['days']) ? $_POST['days'] : 1;

$product_id = isset($_POST['product_id']) ? $_POST['product_id'] : $product->id;

$price = get_post_meta($product_id,'_price', true);

$currency = get_woocommerce_currency_symbol();

$new_price = $price * $output;

$wc_ebs_options = get_post_meta($post->ID, '_booking_option', true);

// Return either the new price or a price / day or normal price

if ( isset($_POST['days']) && $_POST['days'] > 0 ) {

return sprintf( get_woocommerce_price_format(), $currency, $new_price );

} else if ( isset($wc_ebs_options) && $wc_ebs_options ) {

return $content . __(' / day', 'wc_ebs');

} else {

return $content;

}

}

// Calculate new price, update product meta and refresh fragments

public function wc_ebs_get_new_price() {

global $woocommerce, $post;

$product = new WC_Product(the_ID());

$output = isset($_POST['days']) ? $_POST['days'] : 1;

$product_id = isset($_POST['product_id']) ? $_POST['product_id'] : $product->id;

$start_date = isset($_POST['start']) ? $_POST['start'] : '';

$end_date = isset($_POST['end']) ? $_POST['end'] : '';

$price = get_post_meta($product_id,'_price', true);

$new_price = $price * $output;

// If number of days is inferior to 0

if ( $output <= 0 ) {

$error_code = 1;

}

// If one date is empty

if ( $start_date == '' || $end_date == '' ) {

$error_code = 2;

}

// Show error message

if ( $error_code ) {

$error_message = $this->wc_ebs_get_date_error( $error_code );

$woocommerce->add_error($error_message);

$this->wc_ebs_error_fragment($messages);

} else {

// Update product price

$product->get_price_html();

// Update product meta

$this->wc_ebs_update_product_meta( $product_id, $new_price, $start_date, $end_date );

// Return fragments

$this->get_refreshed_fragments();

}

die();

}

// Get error messages

public function wc_ebs_get_date_error( $error_code ) {

switch ( $error_code ) {

case 1:

$err = __( 'Please choose valid dates', 'wc_ebs' );

break;

case 2:

$err = __( 'Please choose two dates', 'wc_ebs' );

break;

default:

$err = '';

break;

}

return $err;

}

// Update product meta (New price, start date and end date)

public function wc_ebs_update_product_meta( $product_id, $new_price, $start_date, $end_date ) {

global $woocommerce, $post, $product;

if ( get_post_meta($product_id, '_new_price', true ) ) {

update_post_meta($product_id, '_new_price', $new_price);

} else {

add_post_meta($product_id, '_new_price', $new_price, true);

}

if ( get_post_meta($product_id, '_start_date', true ) ) {

update_post_meta($product_id, '_start_date', $start_date);

} else {

add_post_meta($product_id, '_start_date', $start_date, true);

}

if ( get_post_meta($product_id, '_end_date', true ) ) {

update_post_meta($product_id, '_end_date', $end_date);

} else {

add_post_meta($product_id, '_end_date', $end_date, true);

}

}

// Update error messages with Ajax

public function wc_ebs_error_fragment( $messages ) {

global $woocommerce;

header( 'Content-Type: application/json; charset=utf-8' );

ob_start();

woocommerce_show_messages();

$messages = ob_get_clean();

$data = array(

'errors' => array(

'div.wc_ebs_errors' => '<div class="wc_ebs_errors">' . $messages . '</div>'

)

);

echo json_encode( $data );

die();

}

// Update price fragment

public function wc_ebs_new_price_fragment( $fragments ) {

global $woocommerce, $post, $product;

$product = new WC_Product(the_ID());

$product_id = isset($_POST['product_id']) ? $_POST['product_id'] : $product->id;

if ( isset($_POST['days']) ) {

ob_start();

echo '<p itemprop="price" class="price">' . $product->get_price_html() . '</p>';

$fragments['p.price'] = ob_get_clean();

}

return $fragments;

}

// Add custom text link on product archive

public function wc_ebs_custom_loop_add_to_cart($content, $product) {

global $woocommerce, $post, $product;

$wc_ebs_options = get_post_meta($post->ID, '_booking_option', true);

if (isset($wc_ebs_options) && $wc_ebs_options) {

$link = get_permalink( $product->id );

$label = __( 'Select dates', 'wc_ebs' );

return '<a href="' . $link . '" rel="nofollow" class="product_type_variable button"><span>' . $label . '</span></a>';

} else {

return $content;

}

}