Memcache support, initially for tweets

includes/creds.php

@@ -4,6 +4,8 @@
 		getDBUser()
 		getDBPass()
 		getDBHost()
+		getMCHost()
+		getMCPort()
 		getAdmins()
 		getGroupID()
 		getGroupID32()

includes/functions_memcache.php

@@ -0,0 +1,41 @@
+<?php
+/**
+* Function collection for fetching and storing variables in our memcache.
+*/
+
+include_once( 'creds.php' );
+
+/**
+* This connects to the memcache store
+* @return object handle to the memcache store, or false if there was a failure
+*/
+function connectMemcache( ) {
+
+	$conn = false;
+	try {
+		$conn = memcache_connect( getMCHost( ), getMCPort( ) );
+	} catch( Exception $e ) {
+		echo $e->getMessage( );
+	}
+	return $conn;
+}
+
+/**
+* This fetches a variable from the memcache store, if the variable is not found
+* it will call the provided function, and store that in the system with the
+* expiry time supplied
+* @param object $memcache a connection to the memcache daemon
+* @param object $variable a handle to the name of the data which it is stored under
+* @param integer $expiry number in seconds for the data to persist
+* @param function $function a function that returns the data you wish to store, in case the memcache data has expired
+* @return object the data requested, either fresh or < expiry
+*/
+function fetchOrStore( $memcache, $variable, $expiry, $function ) {
+	$value = @memcache_get( $memcache, $variable );
+	if ( ! $value ) {
+		$value = $function( );
+		@memcache_set( $memcache, $variable, $value, false, $expiry );
+		// TODO this can fail to set, though we return $value so nothing will be lost?
+	}
+	return $value;
+}

news.php

@@ -3,9 +3,15 @@
 include_once( 'includes/header.php' );
 include_once( 'includes/lastRSS.php' );
 include_once( 'includes/functions_twitter.php' );
+include_once( 'includes/functions_memcache.php' );
 
 $tweetblob = '';
-foreach ( getRecentTweets( 3 ) as $tweet ) {
+$recentTweets = array( );
+$varCache = connectMemcache( );
+// Set expiry to 20 minutes
+$recentTweets = fetchOrStore( $varCache, 'recent-tweets', 20 * 60, function ( ) { return getRecentTweets( 3 ); } );
+
+foreach ( $recentTweets as $tweet ) {
 
 	$time = humanTime ( $tweet[ 'created_at' ] );
 	$user = $tweet[ 'user' ];

servers.php

@@ -6,7 +6,7 @@
 include_once( 'includes/header.php' );
 include_once( 'includes/GameQ.php' );
 include_once( 'includes/paths.php' );
-$Servers = file( $serversRepo . '/serverlist' );
+include_once( 'includes/functions_memcache.php' );
 ?>
 		<h1 class="text-center">Game Servers</h1>
 		<article class="panel panel-default">
@@ -42,64 +42,73 @@
 <?php
 	flush( );
 
-	foreach ( $Servers as $Server ) {
-		if ( strlen( $Server ) > 11 and strrpos( $Server, '#', -strlen( $Server ) ) === False ) {
-			list ( $ServerHost[], $Ports[], $GameType[] ) = preg_split ( '/(:|,)/', $Server );
+	$varCache = connectMemcache( );
+	// Set expiry to 10 minutes
+    echo fetchOrStore( $varCache, 'servers-list', 10 * 60, function ( ) use ( $serversRepo ) {
+
+		$serverlist = '';
+		$Servers = file( $serversRepo . '/serverlist' );
+		foreach ( $Servers as $Server ) {
+			if ( strlen( $Server ) > 11 and strrpos( $Server, '#', -strlen( $Server ) ) === False ) {
+				list ( $ServerHost[], $Ports[], $GameType[] ) = preg_split ( '/(:|,)/', $Server );
+			}
+		}
+		$gq = new GameQ( );
+		foreach ( $ServerHost as $Index => $Host) {
+			$gq->addServer( array(
+				'type' => trim( $GameType[$Index] ),
+				'host' => trim( $Host ) . ":" . trim( $Ports[$Index] ),
+				));
 		}
-	}
-	$gq = new GameQ( );
-	foreach ( $ServerHost as $Index => $Host) {
-		$gq->addServer( array(
-			'type' => trim( $GameType[$Index] ),
-			'host' => trim( $Host ) . ":" . trim( $Ports[$Index] ),
-			));
-	}
 
-	$results = $gq->setOption( 'timeout', 1 )
-				->setFilter( 'normalise' )
-				->requestData( );
+		$results = $gq->setOption( 'timeout', 1 )
+					->setFilter( 'normalise' )
+					->requestData( );
 
-	foreach ( $results as $id => $data ) {
-		if ( ! $data['gq_online'] ) {
-			$data['gq_address'] = preg_replace( '/.steamlug.org/', '​.steamlug.org', $data['gq_address'], 1 );
-			echo <<<SERVERSTRING
-			<tr class="unresponsive">
-				<td></td>
-				<td></td>
-				<td></td>
-				<td><em>Server Unresponsive</em></td>
-				<td><em>{$data['gq_address']}​:{$data['gq_port']}</em></td>
-				<td><em>0 ⁄ 0</em></td>
-				<td class="hidden-xxs"><em>N/A</em></td>
-				<td><i class="text-danger fa-circle-o"></i></span></td>
-			</tr>
+		foreach ( $results as $id => $data ) {
+			if ( ! $data['gq_online'] ) {
+				$data['gq_address'] = preg_replace( '/.steamlug.org/', '​.steamlug.org', $data['gq_address'], 1 );
+				$serverlist .= <<<SERVERSTRING
+				<tr class="unresponsive">
+					<td></td>
+					<td></td>
+					<td></td>
+					<td><em>Server Unresponsive</em></td>
+					<td><em>{$data['gq_address']}​:{$data['gq_port']}</em></td>
+					<td><em>0 ⁄ 0</em></td>
+					<td class="hidden-xxs"><em>N/A</em></td>
+					<td><i class="text-danger fa-circle-o"></i></span></td>
+				</tr>
 SERVERSTRING;
-		} else {
-			/* this block of code should be better… TODO it please */
-			$serverLoc	= geoip_country_code_by_name( $data['gq_address'] );
-			$serverSec	= ! empty( $data['secure'] ) ? '<i class="fa-shield"></i>' : '';
-			$serverPass	= ! empty( $data['gq_password'] ) ? '<i class="fa-lock"></i>' : '';
-			$serverDesc	= ! empty( $data['gq_name'] ) ? $data['gq_name'] : '';
-			// TODO commented out until our new DB stuff is done
-			// $serverDesc	= ! empty( $data['gq_steamappid'] ) ? '<a href="/app/' . $data['gq_steamappid'] . '">' . $data['gq_name'] . '</a>' : $data['gq_name'];
-			$serverNum	= ( ! empty( $data['gq_numplayers'] ) ? $data['gq_numplayers'] : '0') . ' ⁄ ' . $data['gq_maxplayers'];
-			$serverMap	= substr( $data['gq_mapname'], 0, 18 );
-			$connectPort	= ( ! empty( $data['port'] ) ? $data['port'] : ( isset( $data['gameport'] ) ? $data['gameport'] : $data['gq_port'] ) );
-			$serverHost	= $data['gq_address'] . ":" . $connectPort;
-			echo <<<SERVERSTRING
-			<tr>
-				<td><img src="/images/flags/{$serverLoc}.png" title="Hosted in {$serverLoc}" alt="{$serverLoc}" /></td>
-				<td>{$serverSec}</td>
-				<td>{$serverPass}</td>
-				<td>{$serverDesc}</td>
-				<td><a href="steam://connect/{$serverHost}">{$data['gq_hostname']}</a>
-				<td>{$serverNum}</td>
-				<td class="hidden-xxs">{$serverMap}</td>
-				<td><i class="text-success fa-circle"></i></td>
-			</tr>
+			} else {
+				/* this block of code should be better… TODO it please */
+				$serverLoc	= geoip_country_code_by_name( $data['gq_address'] );
+				$serverSec	= ! empty( $data['secure'] ) ? '<i class="fa-shield"></i>' : '';
+				$serverPass	= ! empty( $data['gq_password'] ) ? '<i class="fa-lock"></i>' : '';
+				$serverDesc	= ! empty( $data['gq_name'] ) ? $data['gq_name'] : '';
+				// TODO commented out until our new DB stuff is done
+				// $serverDesc	= ! empty( $data['gq_steamappid'] ) ? '<a href="/app/' . $data['gq_steamappid'] . '">' . $data['gq_name'] . '</a>' : $data['gq_name'];
+				$serverNum	= ( ! empty( $data['gq_numplayers'] ) ? $data['gq_numplayers'] : '0') . ' ⁄ ' . $data['gq_maxplayers'];
+				$serverMap	= substr( $data['gq_mapname'], 0, 18 );
+				$connectPort	= ( ! empty( $data['port'] ) ? $data['port'] : ( isset( $data['gameport'] ) ? $data['gameport'] : $data['gq_port'] ) );
+				$serverHost	= $data['gq_address'] . ":" . $connectPort;
+				$serverlist .= <<<SERVERSTRING
+				<tr>
+					<td><img src="/images/flags/{$serverLoc}.png" title="Hosted in {$serverLoc}" alt="{$serverLoc}" /></td>
+					<td>{$serverSec}</td>
+					<td>{$serverPass}</td>
+					<td>{$serverDesc}</td>
+					<td><a href="steam://connect/{$serverHost}">{$data['gq_hostname']}</a>
+					<td>{$serverNum}</td>
+					<td class="hidden-xxs">{$serverMap}</td>
+					<td><i class="text-success fa-circle"></i></td>
+				</tr>
 SERVERSTRING;
+			}
 		}
-	}
+
+		return $serverlist;
+	} );
 ?>
 					</tbody>
 				</table>