private $currencies = array( 'BTC' => 'BTC', 'USD' => 'USD', '--' => '--', 'AED' => 'AED', 'AFN' => 'AFN', 'ALL' => 'ALL', 'AMD' => 'AMD', 'ANG' => 'ANG', 'AOA' => 'AOA', 'ARS' => 'ARS', 'AUD' => 'AUD', 'AWG' => 'AWG', 'AZN' => 'AZN', 'BAM' => 'BAM', 'BBD' => 'BBD', 'BDT' => 'BDT', 'BGN' => 'BGN', 'BHD' => 'BHD', 'BIF' => 'BIF', 'BMD' => 'BMD', 'BND' => 'BND', 'BOB' => 'BOB', 'BRL' => 'BRL', 'BSD' => 'BSD', 'BTN' => 'BTN', 'BWP' => 'BWP', 'BYR' => 'BYR', 'BZD' => 'BZD', 'CAD' => 'CAD', 'CDF' => 'CDF', 'CHF' => 'CHF', 'CLP' => 'CLP', 'CNY' => 'CNY', 'COP' => 'COP', 'CRC' => 'CRC', 'CUP' => 'CUP', 'CVE' => 'CVE', 'CZK' => 'CZK', 'DJF' => 'DJF', 'DKK' => 'DKK', 'DOP' => 'DOP', 'DZD' => 'DZD', 'EEK' => 'EEK', 'EGP' => 'EGP', 'ETB' => 'ETB', 'EUR' => 'EUR', 'FJD' => 'FJD', 'FKP' => 'FKP', 'GBP' => 'GBP', 'GEL' => 'GEL', 'GHS' => 'GHS', 'GIP' => 'GIP', 'GMD' => 'GMD', 'GNF' => 'GNF', 'GTQ' => 'GTQ', 'GYD' => 'GYD', 'HKD' => 'HKD', 'HNL' => 'HNL', 'HRK' => 'HRK', 'HTG' => 'HTG', 'HUF' => 'HUF', 'IDR' => 'IDR', 'ILS' => 'ILS', 'INR' => 'INR', 'IQD' => 'IQD', 'IRR' => 'IRR', 'ISK' => 'ISK', 'JMD' => 'JMD', 'JOD' => 'JOD', 'JPY' => 'JPY', 'KES' => 'KES', 'KGS' => 'KGS', 'KHR' => 'KHR', 'KMF' => 'KMF', 'KPW' => 'KPW', 'KRW' => 'KRW', 'KWD' => 'KWD', 'KYD' => 'KYD', 'KZT' => 'KZT', 'LAK' => 'LAK', 'LBP' => 'LBP', 'LKR' => 'LKR', 'LRD' => 'LRD', 'LSL' => 'LSL', 'LTL' => 'LTL', 'LVL' => 'LVL', 'LYD' => 'LYD', 'MAD' => 'MAD', 'MDL' => 'MDL', 'MGA' => 'MGA', 'MKD' => 'MKD', 'MMK' => 'MMK', 'MNT' => 'MNT', 'MOP' => 'MOP', 'MRO' => 'MRO', 'MUR' => 'MUR', 'MVR' => 'MVR', 'MWK' => 'MWK', 'MXN' => 'MXN', 'MYR' => 'MYR', 'MZN' => 'MZN', 'NAD' => 'NAD', 'NGN' => 'NGN', 'NIO' => 'NIO', 'NOK' => 'NOK', 'NPR' => 'NPR', 'NZD' => 'NZD', 'OMR' => 'OMR', 'PAB' => 'PAB', 'PEN' => 'PEN', 'PGK' => 'PGK', 'PHP' => 'PHP', 'PKR' => 'PKR', 'PLN' => 'PLN', 'PYG' => 'PYG', 'QAR' => 'QAR', 'RON' => 'RON', 'RSD' => 'RSD', 'RUB' => 'RUB', 'RWF' => 'RWF', 'SAR' => 'SAR', 'SBD' => 'SBD', 'SCR' => 'SCR', 'SDG' => 'SDG', 'SEK' => 'SEK', 'SGD' => 'SGD', 'SHP' => 'SHP', 'SLL' => 'SLL', 'SOS' => 'SOS', 'SRD' => 'SRD', 'STD' => 'STD', 'SVC' => 'SVC', 'SYP' => 'SYP', 'SZL' => 'SZL', 'THB' => 'THB', 'TJS' => 'TJS', 'TMM' => 'TMM', 'TND' => 'TND', 'TOP' => 'TOP', 'TRY' => 'TRY', 'TTD' => 'TTD', 'TWD' => 'TWD', 'TZS' => 'TZS', 'UAH' => 'UAH', 'UGX' => 'UGX', 'UYU' => 'UYU', 'UZS' => 'UZS', 'VEF' => 'VEF', 'VND' => 'VND', 'VUV' => 'VUV', 'WST' => 'WST', 'XAF' => 'XAF', 'XCD' => 'XCD', 'XOF' => 'XOF', 'XPF' => 'XPF', 'YER' => 'YER', 'ZAR' => 'ZAR', 'ZMK' => 'ZMK', 'ZWL' => 'ZWL', );

/**

* Register widget with WordPress.

*/

public function __construct() {

//global $wid, $wname;

parent::__construct(

'coinbase_button', // Base ID

'Coinbase Button', // Name

array( 'description' => __( 'Displays a Coinbase button in your sidebar', 'text_domain' ), ) // Args

);

//add_action('admin_enqueue_scripts', array(&$this, 'admin_styles'), 1);

}

/**

* Front-end display of widget.

*

* @see WP_Widget::widget()

*

* @param array $args Widget arguments.

* @param array $instance Saved values from database.

*/

public function widget( $args, $instance ) {

extract( $args );

$title = apply_filters( 'widget_title', $instance['title'] );

echo $before_widget;

if ( ! empty( $title ) )

echo $before_title . $title . $after_title;

$button_defaults = array(

'name' => '',

'price_string' => '',

'price_currency_iso' => '',

'custom' => '',

'description' => '',

'type' => 'buy_now',

'style' => 'buy_now_large');

$button_args = array();

foreach ($instance as $k => $v) {

if ($k != 'size' && $k != 'title')

$button_args[$k] = $v;

}

$size = $instance['size'];

$style = $instance['type'] . '_' . $size;

$button_args['style'] = $style;

$transient_name = 'cb_ecc_' . md5(serialize($button_args));

$cached = get_transient($transient_name);

if($cached !== false) {

// Cached

echo $cached;

} else {

$api_key = wpsf_get_setting( 'coinbase', 'general', 'api_key' );

$api_secret = wpsf_get_setting( 'coinbase', 'general', 'api_secret' );

if( $api_key && $api_secret ) {

try {

$coinbase = Coinbase::withApiKey($api_key, $api_secret);

$button = $coinbase->createButtonWithOptions($button_args)->embedHtml;

} catch (Exception $e) {

$msg = $e->getMessage();

error_log($msg);

echo "There was an error connecting to Coinbase: $msg. Please check your internet connection and API credentials.";

}

set_transient($transient_name, $button);

echo $button;

} else {

echo "The Coinbase plugin has not been properly set up - please visit the Coinbase settings page in your administrator console.";

}

}

echo $after_widget;

}

/**

* Sanitize widget form values as they are saved.

*

* @see WP_Widget::update()

*

* @param array $new_instance Values just sent to be saved.

* @param array $old_instance Previously saved values from database.

*

* @return array Updated safe values to be saved.

*/

public function update( $new_instance, $old_instance ) {

$instance = array();

$instance['title'] = esc_attr(strip_tags( $new_instance['title'] ));

$instance['name'] = esc_attr(strip_tags( $new_instance['name'] ));

$instance['description'] = esc_attr(strip_tags( $new_instance['description'] ));

$instance['custom'] = esc_attr(strip_tags( $new_instance['custom'] ));

$instance['price_currency_iso'] = esc_attr(strip_tags( $new_instance['price_currency_iso'] ));

$instance['type'] = esc_attr(strip_tags( $new_instance['type'] ));

$instance['size'] = esc_attr(strip_tags( $new_instance['size'] ));

$price = $new_instance['price_string'];

if (!is_numeric(substr($price, 0, 1)))

$price = substr($price, 1);

$instance['price_string'] = (float) $price;

$instance['price_string'] = (string) $price;

return $instance;

}

/**

* Back-end widget form.

*

* @see WP_Widget::form()

*

* @param array $instance Previously saved values from database.

*/

public function form( $instance ) {

$defaults = array(

'title' => '',

'name' => 'Test',

'price_string' => '1.23',

'price_currency_iso' => 'USD',

'custom' => '',

'description' => 'Sample description',

'type' => 'buy_now',

'size' => 'buy_now_large');

extract(wp_parse_args($instance, $defaults));

$price_string = (float) $price_string;

?>

<p>

<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Widget Title:' ); ?></label>

<input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>" />

</p>

<p>

<label for="<?php echo $this->get_field_id( 'name' ); ?>"><?php _e( 'Item Name:' ); ?></label>

<input class="widefat" id="<?php echo $this->get_field_id( 'name' ); ?>" name="<?php echo $this->get_field_name( 'name' ); ?>" type="text" value="<?php echo esc_attr( $name ); ?>" />

</p>

<p>

<label for="<?php echo $this->get_field_id( 'description' ); ?>"><?php _e( 'Description:' ); ?></label>

<input class="widefat" id="<?php echo $this->get_field_id( 'description' ); ?>" name="<?php echo $this->get_field_name( 'description' ); ?>" type="text" value="<?php echo esc_attr( $description ); ?>" />

</p>

<p>

<label for="<?php echo $this->get_field_id( 'currency' ); ?>"><?php _e( 'Amount:' ); ?></label>

<span>

<select class="widefat coinbase-currency" id="<?php echo $this->get_field_id( 'price_currency_iso' ); ?>" name="<?php echo $this->get_field_name('price_currency_iso'); ?>">

<?php

foreach ($this->currencies as $k => $v) {

echo '<option value="' . $k . '"'

. ( $k == $price_currency_iso ? ' selected="selected"' : '' )

. '>' . $v . "</option>\n";

}

?>

</select>

<input class="widefat coinbase-price" id="<?php echo $this->get_field_id( 'price_string' ); ?>" name="<?php echo $this->get_field_name( 'price_string' ); ?>" type="text" value="<?php echo esc_attr( $price_string ); ?>" />

</span>

</p>

<p>

<label for="<?php echo $this->get_field_id( 'type' ); ?>"><?php _e( 'Button Type:' ); ?></label>

<select class="widefat" id="<?php echo $this->get_field_id( 'type' ); ?>" name="<?php echo $this->get_field_name('type'); ?>">

<?php

$types = array(

'buy_now' => 'Buy Now',

'donation' => 'Donation');

foreach ($types as $k => $v) {

echo '<option value="' . $k . '"'

. ( $k == $type ? ' selected="selected"' : '' )

. '>' . $v . "</option>\n";

}

?>

</select>

</p>

<p>

<label for="<?php echo $this->get_field_id( 'size' ); ?>"><?php _e( 'Button Size:' ); ?></label>

<select class="widefat" id="<?php echo $this->get_field_id( 'size' ); ?>" name="<?php echo $this->get_field_name('size'); ?>">

<?php

$sizes = array(

'large' => 'Large',

'small' => 'Small'

);

foreach ($sizes as $k => $v) {

echo '<option value="' . $k . '"'

. ( $k == $size ? ' selected="selected"' : '' )

. '>' . $v . "</option>\n";

}

?>

</select>

</p>

<!--<a id="coinbase-toggle" class="coinbase-toggle">Show Advanced Options</a>-->

<div id="coinbase-advanced" class="coinbase-advanced">

<p>

<label for="<?php echo $this->get_field_id( 'custom' ); ?>"><?php _e( 'Custom ID:' ); ?></label>

<input class="widefat" id="<?php echo $this->get_field_id( 'custom' ); ?>" name="<?php echo $this->get_field_name( 'custom' ); ?>" type="text" value="<?php echo esc_attr( $custom ); ?>" />

<small>Optional. This gets passed through in <a target="_blank" href="https://coinbase.com/docs/merchant_tools/callbacks">callbacks</a> to your site.</small>

</p>

</div>

<?php

}