From bd8796b824d2e88d91be07bea0284ca25f1d2a45 Mon Sep 17 00:00:00 2001
From: Sebastian Grewe <sebastian@grewe.ca>
Date: Wed, 18 Sep 2013 13:11:24 +0200
Subject: [PATCH] [FEATURE] Added Ajax JSON Memcache

---
 public/include/classes/api.class.php         |  9 ++++++++-
 public/include/classes/base.class.php        |  3 +++
 public/include/config/admin_settings.inc.php | 14 ++++++++++++++
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/public/include/classes/api.class.php b/public/include/classes/api.class.php
index 26b2a95d..b37cf9b6 100644
--- a/public/include/classes/api.class.php
+++ b/public/include/classes/api.class.php
@@ -30,13 +30,19 @@ class Api extends Base {
    * @return string JSON object
    **/
   function get_json($data, $force=false) {
-    return json_encode(
+    // Create a request specific memcache key
+    $sMemcacheKey = @$_REQUEST['page'] . '_' . @$_REQUEST['action'] . '_' . __FUNCTION__ . '_' . @$SESSION['USERDATA']['id'] . '_' . $_SESSION['REMOTE_ADDR'];
+    if ($this->setting->getValue('statistics_ajax_cache') && $json_data = $this->memcache->get($sMemcacheKey)) return $json_data;
+    $json_data =json_encode(
       array( $_REQUEST['action'] => array(
         'version' => $this->api_version,
         'runtime' => (microtime(true) - $this->dStartTime) * 1000,
         'data' => $data
       )), $force ? JSON_FORCE_OBJECT : 0
     );
+    if (! $expiration = $this->setting->getValue('statistics_ajax_cache_expiration')) $expiration = 10;
+    if ($this->setting->getValue('statistics_ajax_cache'))
+      return $this->memcache->setCache($sMemcacheKey, $json_data, $expiration);
   }
 
   /**
@@ -63,4 +69,5 @@ $api = new Api();
 $api->setConfig($config);
 $api->setUser($user);
 $api->setSetting($setting);
+$api->setMemcache($memcache);
 $api->setStartTime($dStartTime);
diff --git a/public/include/classes/base.class.php b/public/include/classes/base.class.php
index 2aae51ce..7aed05e3 100644
--- a/public/include/classes/base.class.php
+++ b/public/include/classes/base.class.php
@@ -37,6 +37,9 @@ class Base {
   public function setSetting($setting) {
     $this->setting = $setting;
   }
+  public function setMemcache($memcache) {
+    $this->memcache = $memcache;
+  }
   public function setBitcoin($bitcoin) {
     $this->bitcoin = $bitcoin;
   }
diff --git a/public/include/config/admin_settings.inc.php b/public/include/config/admin_settings.inc.php
index 97290903..31cdb2cf 100644
--- a/public/include/config/admin_settings.inc.php
+++ b/public/include/config/admin_settings.inc.php
@@ -116,6 +116,20 @@ $aSettings['statistics'][] = array(
   'name' => 'statistics_ajax_data_interval', 'value' => $setting->getValue('statistics_ajax_data_interval'),
   'tooltip' => 'Time in minutes, interval for hashrate and sharerate calculations. Higher intervals allow for better accuracy at a higer server load.'
 );
+$aSettings['statistics'][] = array(
+  'display' => 'Ajax Caching', 'type' => 'select',
+  'options' => array('0' => 'No', '1' => 'Yes'),
+  'default' => 0,
+  'name' => 'statistics_ajax_cache', 'value' => $setting->getValue('statistics_ajax_cache'),
+  'tooltip' => 'Enable or disable the Ajax cache for memcache.'
+);
+$aSettings['statistics'][] = array(
+  'display' => 'Ajax Cache Expiration', 'type' => 'select',
+  'options' => array('5' => '5', '10' => '10', '20' => '20', '40' => '40', '60' => '60'),
+  'default' => 10,
+  'name' => 'statistics_ajax_cache_expiration', 'value' => $setting->getValue('statistics_ajax_cache_expiration'),
+  'tooltip' => 'Change expiration time for memcache keys.'
+);
 $aSettings['statistics'][] = array(
   'display' => 'Block Statistics Count', 'type' => 'text',
   'size' => 25,