widget.php

<?php

/*

Copyright (C) 2014 Dooga Ltd.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

*/

/**
 * Registers the Cubits Button widget
 *
 */

class Cubits_Button extends WP_Widget {

  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, $wname;
    parent::__construct(
      'cubits_button', // Base ID
      'Cubits Button', // Name
      array( 'description' => __( 'Displays a Cubits button in your sidebar', 'text_domain' ), ) // Args
    );
    //add_action('admin_enqueue_scripts', array(&$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' => '',
              'currency' => '',
              'price' => '',
              'nonce' => '');

    $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( 'cubits', 'general', 'api_key' );
      $api_secret = wpsf_get_setting( 'cubits', 'general', 'api_secret' );
      if( $api_key && $api_secret ) {
        try {
          Cubits::configure("https://pay.cubits.com/api/v1/",true);
          $cubits = Cubits::withApiKey($api_key, $api_secret);
          $options = array(
            'callback_url'       => null,
            'reference'          => time(),
            'success_url'        => null,
            'cancel_url'         => null
          );
          $link = $cubits->createInvoice("Alpaca socks", "10.00", "CAD", $options)->invoice_url;
          $button = "<a href='".$link."'>Go to invoice</a>";
        } catch (Exception $e) {
          $msg = $e->getMessage();
          error_log($msg);
          echo "There was an error connecting to Cubits: $msg. Please check your internet connection and API credentials.";
        }
        set_transient($transient_name, $button);
        echo $button;
      } else {
        echo "The Cubits plugin has not been properly set up - please visit the Cubits settings page in your administrator console.x";
      }
    }

    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'] = esc_attr(strip_tags( $new_instance['price'] ));
    $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 ) {
    $defaults = array(
        'title' => '',
          'name' => 'Test',
          'price' => '1.23',
          'currency' => 'USD',
          'nonce' => '',
          'description' => 'Sample description',
          'type' => 'buy_now',
          'size' => 'buy_now_large');
    extract(wp_parse_args($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 cubits-currency" id="<?php echo $this->get_field_id( 'currency' ); ?>" 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 cubits-price" id="<?php echo $this->get_field_id( 'price' ); ?>" 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="cubits-toggle" class="cubits-toggle">Show Advanced Options</a>-->
    <div id="cubits-advanced" class="cubits-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://cubits.com/help">callbacks</a> to your site.</small>
      </p>
    </div>

    <?php
  }

} // Widget class

// register the widget
add_action( 'widgets_init', create_function( '', "register_widget( 'Cubits_Button' );" ) );