<?php
/*
Plugin Name: Amazon Tools
Description: Amazon Tools is a plugin that allows you to integrate your Wordpress blog with Amazon Web Services. Using Amazon Tools you can quickly and easily retrieve product data from Amazon.com and display it on your blog.
Version: 1.0.1
Plugin URI: http://forums.tinsology.net/index.php
Author URI: http://tinsology.net
Author: Mathew Tinsley

/*
	Copyright 2010 Mathew Tinsley (email: tinsley@tinsology.net)
	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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
require_once('lib.php');
require_once('menus.php');
require_once('metabox.php');
require_once('ajax.php');
class AmazonTools {

	private $allowed_settings = array('access_key', 'associate_tag');
	private $last_asin;
	private $ajax_update;
	
	public $url;
	public $dir;
	
	public $css_url;
	public $css_dir;
	
	public static $prefix = 'amazon_tools_';
	public static $version = '1.0.1';
	
	public function __construct()
	{
		register_activation_hook( __FILE__, array($this, 'install') );
		register_deactivation_hook( __FILE__, array($this, 'uninstall') );
		
		if(amazon_is_active())
		{
			add_shortcode('amazon', array($this, 'shortcode') );
			
			add_filter('get_the_excerpt', array($this, 'applyTemplateExcerpt'), 1);
			add_filter('the_content', array($this, 'applyTemplate'), 15);
			add_filter('the_excerpt', array($this, 'bufferData'), 16);
			add_filter('the_content', array($this, 'bufferData'), 16);
			add_filter('the_excerpt', 'do_shortcode');
			
			if(get_option('amazon_widget_shortcodes') == 1)
			{
				add_filter('widget_text', 'do_shortcode', 5);
				add_filter('widget_text', array($this, 'bufferData'), 6);
			}
		}
		add_action('wp_print_footer_scripts', array($this, 'ajaxUpdate'));
		add_action('init', array($this, 'enqueueScripts'));
		
		$this->url = plugins_url('', __FILE__);
		$this->dir = dirname(__FILE__);
		
		$this->css_url = get_option('amazon_global_css');
		$this->css_dir = get_option('amazon_global_css_dir');
		
		$this->ajax_update = false;
		
		global $amazon_locale;
		$locale = get_option('amazon_locale');
		$amazon_locale = $locale == '' ? 'us' : $locale;
	}

	public function uninstall()
	{
		global $wpdb;
		$prefix = $wpdb->prefix;
		
		$cache 		= "DROP TABLE IF EXISTS {$prefix}amazon_cache;";
		$templates 	= "DROP TABLE IF EXISTS {$prefix}amazon_templates;";
		$suggest 	= "DROP TABLE IF EXISTS {$prefix}amazon_suggest;";
		$fields 	= "DROP TABLE IF EXISTS {$prefix}amazon_template_fields;";
		
		$wpdb->query($cache);
		$wpdb->query($templates);
		$wpdb->query($suggest);
		$wpdb->query($fields);
		
		delete_option('amazon_state');
		delete_option('amazon_expire');
		delete_option('amazon_error');
		delete_option('amazon_update_method');
	}

	public function install()
	{
		global $wpdb;
		$prefix = $wpdb->prefix;
		
		add_option('amazon_state');
		
		ob_start();
		$wpdb->show_errors();
		
		$suggest = "CREATE TABLE {$prefix}amazon_suggest (
					asin CHAR(10),
					suggestion CHAR(10),
					expire INT NOT NULL,
					PRIMARY KEY(asin, suggestion)
				);";
		
		$cache = "CREATE TABLE {$prefix}amazon_cache (
					asin CHAR(10) NOT NULL,
					field VARCHAR(32) NOT NULL,
					value TEXT,
					expire INT NOT NULL,
					PRIMARY KEY(asin, field)
				);";
				
		$templates = "CREATE TABLE {$prefix}amazon_templates (
						id INT PRIMARY KEY AUTO_INCREMENT,
						name VARCHAR(128),
						type VARCHAR(15),
						content TEXT,
						excerpt TEXT,
						css TEXT
					);";
					
		$template_fields = "CREATE TABLE {$prefix}amazon_template_fields (
								template INT,
								field_name VARCHAR(64),
								default_value TEXT,
								type VARCHAR(15),
								PRIMARY KEY(template, field_name)
					);";
					
		if($wpdb->query($cache) !== false && $wpdb->query($templates) !== false
			&& $wpdb->query($suggest) !== false && $wpdb->query($template_fields) !== false)
		{
			$wpdb->hide_errors();
			update_option('amazon_state', 'ok');
			update_option('amazon_db_version', 1.0);
		}
		else
		{
			$wpdb->hide_errors();
			update_option('amazon_state', 'install_failed');
			update_option('amazon_error', ob_get_clean());
		}
		
		if(get_option('amazon_state') == 'ok')
		{
			amazon_sample_templates();
		}
		
		add_option('amazon_expire', 3); //cache expire time, default 3 days
		add_option('amazon_update_method', 'ajax');
		add_option('amazon_install_time', time());
		add_option('amazon_widget_shortcodes', 1);
		add_option('amazon_locale', 'us');
		add_option('amazon_css_version', time());
		add_option('amazon_global_css');
	}
	
	public function triggerAjaxUpdate()
	{
		$this->ajax_update = true;
	}
	
	public function enqueueScripts()
	{
		wp_enqueue_script('jquery');
		if($this->css_url != '')
			wp_enqueue_style('amazon_global_css', $this->css_url, array(), get_option('amazon_css_version'));
	}
	
	public function ajaxUpdate()
	{
		if(!$this->ajax_update)
			return;
		
		$nonce = wp_create_nonce('amazon_update_nonce');
?>
<script type="text/javascript">
jQuery(document).ready(function($) {
	var amazon_ajax_url = '<?php echo admin_url('admin-ajax.php'); ?>';
	var data = {
		action: 'amazon_update',
		security: '<?php echo $nonce; ?>'
	};
	jQuery.post(amazon_ajax_url, data, function(response){});
});
</script>
<?php
	}
	
	public function applyTemplate($content, $excerpt = false)
	{
		global $post;
		$temp_id = get_post_meta($post->ID, 'amazon_post_template', true);
		
		if(!$temp_id)
			return $content;
			
		$template = amazon_get_template($temp_id);
		$temp_fields = amazon_get_template_fields($template['id']);
		$fields = array();
		
		foreach($temp_fields as $field)
		{
			$key = AmazonTools::$prefix . $field['field_name'];
			$meta_value = get_post_meta($post->ID, $key, true);
			//$fields[$field['field_name']] = ($meta_value != '') ? $meta_value : $field['default_value'];
			$fields[$field['field_name']] = $meta_value;
		}
		
		if($excerpt && trim($template['excerpt']) == '')
			return $content;
		
		$temp_content = ($excerpt) ? $template['excerpt'] : $template['content'];
		$temp_content = stripslashes($temp_content);
		
		foreach($fields as $key => $value)
		{
			$temp_content = str_replace('%' . $key . '%', $value, $temp_content);
		}
		
		$css = ($template['css'] == '') ? '' : "<style type=\"text/css\">\n{$template['css']}\n</style>\n";
		
		return $css . do_shortcode(str_replace('%content%', $content, $temp_content));
	}
	
	public function applyTemplateExcerpt($content)
	{
		if($content == '')
		{
			global $post;
			$content = $post->post_content;
		}
		return $this->applyTemplate($content, true);
	}
	
	public function shortcode($atts, $content = null)
	{
		if(isset($atts['foreach']))
			return $this->shortcodeForeach($atts, $content);
			
		if(isset($atts['random']))
		{
			$asins = ($atts['random'] == '' || $atts['random'] == 1) ? explode(',', strip_tags($content)) : explode(',', $atts['random']);
			$key = array_rand($asins);
			$this->last_asin = trim($asins[$key]);
			
			if($content)
			{
				if($atts['random'] != '' && $atts['random'] != 1)
					return do_shortcode($content);
			}
			elseif(!isset($atts['template']))
					return do_shortcode($content);
		}
			
		if(isset($atts['setting']))
		{
			$setting = $this->shortcodeSetting($atts['setting']);
			if($content == null || $setting == '')
				return $setting;
				
			return do_shortcode($content);
		}
		
		if(isset($atts['asin']) && $atts['asin'] != '%asin%')
			$this->last_asin = $atts['asin'];
		
		if(isset($atts['template']))
		{
			if($template = amazon_get_template($atts['template']))
			{
				$temp_content = str_replace('%asin%', $this->last_asin, stripslashes($template['content']));
				$css = ($template['css'] == '') ? '' : "<style type=\"text/css\">\n{$template['css']}\n</style>\n";
				
				return $css . do_shortcode($temp_content);
			}
			
			return do_shortcode($content);
		}
			
		if(isset($atts['get']))
		{
			global $amazon_buffer;
			$asin = (string) $this->last_asin;
			$get = isset($atts['get']) ? $atts['get'] : $content;
			
			$amazon_buffer[$asin][] = $get;
			
			return '%' . $asin . '_' . $get . '%';
		}
		
		return do_shortcode($content);
	}
	
	private function shortcodeForeach($atts, $content)
	{
		//validate
		if($content == '')
			return '';
		elseif(!isset($atts['asin']) && !isset($atts['similar']))
			return '';
			
		$asin = array();
		if(isset($atts['asin']) && $atts['asin'] != '')
		{
			$asin = explode(',', $atts['asin']);
		}
			
		//if similar is set, process
		if(isset($atts['similar']) && $atts['similar'] != '')
		{
			$similar = $this->getSimilar($atts['similar']);
			$asin = array_merge($asin, $similar);
			$asin = array_unique($asin);
		}
		
		//check if there is a limit set
		if(isset($atts['limit']) && is_numeric($atts['limit']))
		{
			if(count($asin) > $limit)
				$asin = array_slice($asin, 0, $limit);
		}
		
		$processedContent = '';
		
		foreach($asin as $a)
		{
			$this->last_asin = $a;
			$curr = str_replace('%asin%', $a, $content);
			$processedContent .= do_shortcode($curr) . "\n";
		}
		
		return $processedContent;
	}
	
	private function shortcodeSetting($key)
	{
		if(!in_array($key, $this->allowed_settings))
			return '';
		else
			return get_option('amazon_' . $key);
	}
	
	public function bufferData($content)
	{
		global $amazon_buffer;
		global $amazon_locale;
		
		foreach($amazon_buffer as &$keys)
		{
			$keys = array_unique($keys);
		}
		
		//echo '<pre>'; print_r($amazon_buffer); echo '</pre>';
		
		if(count($amazon_buffer) < 1)
			return $content;
		
		$data = amazon_fetch($amazon_buffer, $amazon_locale);
		
		foreach($data as $asin => $keys)
		{
			foreach($keys as $key => $value)
			{
				$search = "%{$asin}_{$key}%";
				$content = str_replace($search, $value, $content);
			}
		}
		
		$amazon_buffer = array();
		
		return $content;
	}
	
	private function getSimilar($asin)
	{
		//TODO
	}
}
$amazon_locale = 'us';
$amazon_tools = new AmazonTools();

$amazon_buffer = array();

?>