<?php

/**

 * Provides a notification everytime the theme is updated

 * Original code courtesy of João Araújo of Unisphere Design - http://themeforest.net/user/unisphere

 */



function update_notifier_menu() {   

	$xml = get_latest_theme_version(604800); // This tells the function to cache the remote call for 604800 seconds (7 days)

	$theme_data = get_theme_data(TEMPLATEPATH . '/style.css'); // Get theme data from style.css (current version is what we want)

	

	if(version_compare($theme_data['Version'], $xml->latest) == -1) {

	add_dashboard_page( $theme_data['Name'] . 'Theme Updates ', '&nbsp;<span class="update-plugins count-2"><span class="update-count">New Theme Update</span></span>', 'administrator','m3-updates', update_notifier);

	}

}  



add_action('admin_menu', 'update_notifier_menu');



function update_notifier() { 

	$xml = get_latest_theme_version(21600); // This tells the function to cache the remote call for 21600 seconds (6 hours)

	$theme_data = get_theme_data(TEMPLATEPATH . '/style.css'); // Get theme data from style.css (current version is what we want) ?>

	

	<style>

		.update-nag {display: none;}

		#instructions {max-width: 800px;}

		h3.title {margin: 30px 0 0 0; padding: 30px 0 0 0; border-top: 1px solid #ddd;}

	</style>

		<style type="text/css">

		.changelogcss { font: 400 14px/22px Georgia, serif; color: #333; width:805px;}

		.changelogcss h1 { font-family:Georgia, serif;font-size: 26px; font-weight: 400; border-bottom: 1px dotted #ccc; padding: 20px 0 5px 0; color: #333; }

		.changelogcss h2 {font-family:Georgia, serif; font-size: 18px; font-weight: 400; border-bottom: 1px dotted #ccc; padding: 20px 0 0px 0; color: #333; }

		.changelogcss h2 span { font-family:Georgia, serif;color: #999; font-size: 12px; float: right; }

		.changelogcss strong { font-weight: 400; color: #000; font-style: italic; padding-bottom: 1px; border-bottom: 1px solid #ccc; }

		.changelogcss em { color: #000; font-style: normal; padding: 1px 4px 2px; border-bottom: 1px dotted #ccc; background-color: #f1f0cf; text-shadow: 0 1px 0 #fff; cursor: default; }

		.changelogcss a { outline: none; color: #53769a; }

		.changelogcss .wrapper { width: 650px; margin: 20px auto; }

		.changelogcss xmp { background-color: #f4f4f4; border-width: 1px 0; border-style: dotted; border-color: #ccc; padding: 2px 5px; font-size: 12px; text-shadow: 0 1px 0 #fff; }

		.changelogcss ol { float: left; width: 100%; margin: 0 0 25px 40px; }

		.changelogcss li { padding: 0;  float: left; width: auto; clear: left; margin-bottom: 5px; }

  	</style>



	<div class="wrap">

	

		<div id="icon-tools" class="icon32"></div>

		<h2><?php echo $theme_data['Name']; ?> Theme Updates</h2>

	    <div id="message" class="updated below-h2"><p><strong>There is a new version of the <?php echo $theme_data['Name']; ?> theme available.</strong> You have version <?php echo $theme_data['Version']; ?> installed. Update to version <?php echo $xml->latest; ?>.</p></div>

        

        <img style="float: left; margin: 0 20px 20px 0; border: 1px solid #ddd;" src="<?php echo get_bloginfo( 'template_url' ) . '/screenshot.png'; ?>" />

        

        <div id="instructions" style="max-width: 800px;">

            <h3>Update Download and Instructions</h3>

            <p><strong>Please note:</strong> make a <strong>backup</strong> of the Theme inside your WordPress installation folder <strong>/wp-content/themes/<?php echo strtolower($theme_data['Name']); ?>/</strong></p>

            <p><a href="http://magazine3.com/update-instructions"><b>Read the instructions on How to Update the theme.</b></a></p>

        </div>

        

            <div class="clear"></div>

	    

 	<div class="changelogcss wrapper"> 

				<h1>Change Logs</h1> 

    <?php echo $xml->changelog; ?></div>



	</div>

    

<?php } 



// This function retrieves a remote xml file on my server to see if there's a new update 

// For performance reasons this function caches the xml content in the database for XX seconds ($interval variable)

function get_latest_theme_version($interval) {

	// remote xml file location 

	$notifier_file_url = 'http://magazine3.com/updates/internationalpost.xml'; 

	

	$db_cache_field = 'contempo-notifier-cache';

	$db_cache_field_last_updated = 'contempo-notifier-last-updated';

	$last = get_option( $db_cache_field_last_updated );

	$now = time();

	// check the cache

	if ( !$last || (( $now - $last ) > $interval) ) {

		// cache doesn't exist, or is old, so refresh it

		if( function_exists('curl_init') ) { // if cURL is available, use it...

			$ch = curl_init($notifier_file_url);

			curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

			curl_setopt($ch, CURLOPT_HEADER, 0);

			curl_setopt($ch, CURLOPT_TIMEOUT, 10);

			$cache = curl_exec($ch);

			curl_close($ch);

		} else {

			$cache = file_get_contents($notifier_file_url); // ...if not, use the common file_get_contents()

		}

		

		if ($cache) {			

			// we got good results

			update_option( $db_cache_field, $cache );

			update_option( $db_cache_field_last_updated, time() );			

		}

		// read from the cache file

		$notifier_data = get_option( $db_cache_field );

	}

	else {

		// cache file is fresh enough, so read from it

		$notifier_data = get_option( $db_cache_field );

	}

	
	$xml = simplexml_load_string($notifier_data); 

	return $xml;
}
?>