CheckfrontWidget.php

<?php 
/**
 * Checkfront Widget
 * PHP 5-7
 *
 * @package     CheckfrontWidget
 * @version     3.0
 * @author      Checkfront <code@checkfront.com>
 * @copyright   2008-2016 Checkfront Inc
 * @license     http://opensource.org/licenses/bsd-license.php New BSD License
 * @link        http://www.checkfront.com/developers/
 * @link        https://github.com/Checkfront/PHP-Widget
 *
 *
 * This makes use of the Checkfront embeddable widgets. It allows you
 * to embed a booking widget into any website, allows you to customize 
 * the look and feel, and takes care of sizing, caching etc.
 *
 * If the booking page is hosted under SSL and e-commerce is enabled
 * the customer will stay on your site for the duration of the booking
 * unless your are using Paypal or Google Checkout.
 *
 *
 * This class is designed to provide a quick way of integrating Checkfront
 * into a website.  If you wish to further extend the platform, consider
 * using the Checkfront SDK and API instead:
 * http://api.checkfront.com/
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * o Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * o Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * o The names of the authors may not be used to endorse or promote
 *   products derived from this software without specific prior written
 *   permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

class CheckfrontWidget {

	public $version = '3.0';
	public $interface_version = '23';
	public $host= '';
	public $url = '';
	public $src = '';
	public $plugin_url = '';
	public $pipe_url = '';


	public $load_msg = 'Searching Availability';
	public $continue_msg = 'Continue to Secure Booking System';
	public $offline_msg= 'Bookings not yet available here.';

	public $arg = array(); 


	function __construct($cnf) {

		if(isset($cnf['host'])) $this->set_host($cnf['host']);
		if(isset($cnf['pipe_url'])) $this->set_pipe($cnf['pipe_url']);
		if(isset($cnf['plugin_url'])) $this->set_plugin_url($cnf['plugin_url']);
		$this->provider = (isset($cnf['provider'])) ? $cnf['provider'] : 'php';

		if($cnf['load_msg']) $this->load_msg = strip_tags($cnf['load_msg']);
		if($cnf['continue_msg']) $this->continue_msg = strip_tags($cnf['continue_msg']);
	}

	/**
	 * set the url base for the widget.  should be an absolute url local to the site
	 * eg: http://www.mysite.com/checkfront-plugin -- must also match the current schema (http:// | https://)
	 * @param string $url
	 */
	function set_plugin_url($url) {
		$this->plugin_url = preg_replace('|/$|','',$url);
	}


	/**
	 * set location of the pipe.html file. Must be located on the same domain.
	 * @param string $url
	 */
	function set_pipe($url) {
		$this->pipe_url = preg_replace('|/$|','',$url);
	}

	/**
	 * sets the checkfront host
	 * @param string $host
	 */
	private function set_host($host) {
		$this->host = $host;
		$this->url = "//{$this->host}";
	}

	/**
	 * set valid host
	 *
	 * @param string $host
	 * @return string $host
	 */
	public function valid_host($host) {
		if(!preg_match('~^http://|https://~',$host)) $host = 'https://' . $host;
		if($uri = parse_url($host)) {
			if($uri['host']) {
				return $uri['host'];
			}
		}
		return '';
	}

	/**
	 * display error when plugin is not yet configured
	 *
	 * @return string $html formatted message
	 */
	public function error_config() {
		return '<p style="padding: .5em; border: solid 1px red;">' . $this->offline_msg .'</p>';
	}

	/**
	 * render booking widget
	 *
	 * @param array $cnf shortcode parameters
	 * @return string $html rendering code
	 */
	public function render($cnf) {
		$cnf = $this->clean($cnf);
		return $this->portal($cnf);
	}

	/**
	 * clean short code params
	 *
	 * @param array $cnf shortcode parameters
	 * @return array $cnf formatted parameters
	 */
	private function clean($cnf) {
		foreach($cnf as $cnf_id => $data) {
			$data = preg_replace("/\#|'|>|</",'',strip_tags($data));
			$cnf[$cnf_id] = $data;
		}
		return $cnf;   
	}
	/**
	 * set the category and item id filters
	 *
	 * @param string $ids
	 * @return string $ids eg 1,2,5
	 */
	private function set_ids($ids) {
		return preg_replace("/[^0-9,]/",'',$ids);
	}


	/**
	 * @param array $cnf shortcode parameters
	 * @return string $html rendering code
	 */
	private function portal($cnf=array()) {

		$cnf_default = array(
			'widget_id'          => '',
			'item_id'            => '',
			'filter_category_id' => '',
			'category_id'        => '',
			'layout'             => '',
			'discount_code'      => '',
			'discount'           => '',
			'lang_id'            => '',
			'tid'                => '',
			'partner_id'         => '',
			'options'            => '',
			'date'               => '',
			'end_date'           => '',
			'style'              => '',
			'host'               => '',
		);
		$cnf = array_merge($cnf_default, $cnf ? $cnf : []);

		if($cnf['host'] and $this->valid_host($cnf['host'])) {
			$this->set_host($cnf['host']);
		}

		$cnf['widget_id'] = (isset($cnf['widget_id']) and $cnf['widget_id'] > 0) ? $cnf['widget_id'] : '01';
		$html = "\n<!-- CHECKFRONT BOOKING PLUGIN v{$this->interface_version}-->\n";
		$html .= '<div id="CHECKFRONT_WIDGET_' . $cnf['widget_id'] . '"><p id="CHECKFRONT_LOADER" style="background: url(\'//' . $this->host . '/images/loader.gif\') left center no-repeat; padding: 5px 5px 5px 20px">' . $this->load_msg . '...</p></div>';
		$html .= "\n<script>\nnew CHECKFRONT.Widget ({\n";
		$html .= "host: '{$this->host}',\n";
		if($this->pipe_url) {
			$html .= "pipe: '{$this->pipe_url}',\n";
		}
		$html .= "target: 'CHECKFRONT_WIDGET_{$cnf['widget_id']}',\n";

		// Comma separated list of item_ids or skus to filter by
		if($cnf['item_id']) {
			$cnf['item_id'] = $this->set_ids($cnf['item_id']);
			$html .= "item_id: '{$cnf['item_id']}',\n";
		}
		// Comma separated list of category ids to filter by.
		if($cnf['category_id']) {
			$cnf['category_id'] = $this->set_ids($cnf['category_id']);
			$html .= "category_id: '{$cnf['category_id']}',\n";
		}
		if($cnf['filter_category_id']) {
			$cnf['filter_category_id'] = $this->set_ids($cnf['filter_category_id']);
			$html .= "filter_category_id: '{$cnf['filter_category_id']}',\n";
		}
		if($cnf['width'] and $cnf['width'] > 0)  $html .= "width: '{$cnf['width']}',\n";
		if($cnf['layout'])  $html .= "layout: '{$cnf['layout']}',\n";
		if($cnf['tid'])  $html .= "tid: '{$cnf['tid']}',\n";
		if($cnf['partner_id'])  $html .= "partner_id: '{$cnf['partner_id']}',\n";
		if($cnf['discount_code'])  $html .= "discount_code: '{$cnf['discount_code']}',\n";
		elseif($cnf['discount'])  $html .= "discount_code: '{$cnf['discount']}',\n";
		if($cnf['lang_id'])  $html .= "lang_id: '{$cnf['lang_id']}',\n";
		if($cnf['locale_id']) $html .= "locale_id: '{$cnf['locale_id']}',\n";
		if($cnf['options'])  $html.= "options: '{$cnf['options']}',\n";
		if($cnf['date'])  $html.= "date: '{$cnf['date']}',\n";
		if($cnf['end_date'])  $html.= "end_date: '{$cnf['end_date']}',\n";
		if($cnf['style'])  $html .= "style: '{$cnf['style']}',\n";
		$html .= "provider: '{$this->provider}'\n";
		$html .="}).render();\n</script>\n";
		$html .= '<noscript><a href="https://' . $this->host . '/reserve/" style="font-size: 16px">' . $this->continue_msg . ' &raquo;</a></noscript>' . "\n";
		return $html;
	}	
}