From 30fccfcd8240e1c48edbf21dc1219e492a606a4c Mon Sep 17 00:00:00 2001
From: Skylar Kelty <s.kelty@kent.ac.uk>
Date: Thu, 13 Apr 2017 10:36:05 +0100
Subject: [PATCH] MDL-58590 mobile: Cache mobile-supporting plugins

---
 admin/tool/mobile/classes/api.php         | 12 +++++++-
 admin/tool/mobile/db/caches.php           | 34 +++++++++++++++++++++++
 admin/tool/mobile/lang/en/tool_mobile.php |  1 +
 admin/tool/mobile/version.php             |  2 +-
 4 files changed, 47 insertions(+), 2 deletions(-)
 create mode 100644 admin/tool/mobile/db/caches.php

diff --git a/admin/tool/mobile/classes/api.php b/admin/tool/mobile/classes/api.php
index 1545996f252b4..f61f8b52c3ab1 100644
--- a/admin/tool/mobile/classes/api.php
+++ b/admin/tool/mobile/classes/api.php
@@ -58,6 +58,13 @@ public static function get_plugins_supporting_mobile() {
         global $CFG;
         require_once($CFG->libdir . '/adminlib.php');
 
+        // Check if we can return this from cache.
+        $cache = \cache::make('tool_mobile', 'plugininfo');
+        $pluginsinfo = $cache->get('mobileplugins');
+        if ($pluginsinfo !== false) {
+            return (array)$pluginsinfo;
+        }
+
         $pluginsinfo = [];
         $plugintypes = core_component::get_plugin_types();
 
@@ -69,7 +76,7 @@ public static function get_plugins_supporting_mobile() {
                 $component = $plugintype . '_' . $plugin;
                 $version = get_component_version($component);
 
-                require_once("$path/db/mobile.php");
+                require("$path/db/mobile.php");
                 foreach ($addons as $addonname => $addoninfo) {
                     $plugininfo = array(
                         'component' => $component,
@@ -92,6 +99,9 @@ public static function get_plugins_supporting_mobile() {
                 }
             }
         }
+
+        $cache->set('mobileplugins', $pluginsinfo);
+
         return $pluginsinfo;
     }
 
diff --git a/admin/tool/mobile/db/caches.php b/admin/tool/mobile/db/caches.php
new file mode 100644
index 0000000000000..6cfcca7805132
--- /dev/null
+++ b/admin/tool/mobile/db/caches.php
@@ -0,0 +1,34 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle 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 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Mobile cache definitions.
+ *
+ * @package    tool_mobile
+ * @copyright  2017 Skylar Kelty <S.Kelty@kent.ac.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die;
+
+$definitions = array(
+    'plugininfo' => array(
+        'mode' => cache_store::MODE_APPLICATION,
+        'simplekeys' => true,
+        'staticacceleration' => true,
+        'staticaccelerationsize' => 1
+    )
+);
diff --git a/admin/tool/mobile/lang/en/tool_mobile.php b/admin/tool/mobile/lang/en/tool_mobile.php
index 1818a2f405ea0..56e929a4bdecd 100644
--- a/admin/tool/mobile/lang/en/tool_mobile.php
+++ b/admin/tool/mobile/lang/en/tool_mobile.php
@@ -26,6 +26,7 @@
 $string['androidappid_desc'] = 'This setting may be left as default unless you have a custom Android app.';
 $string['autologinkeygenerationlockout'] = 'Auto-login key generation is blocked because of too many requests within an hour.';
 $string['autologinnotallowedtoadmins'] = 'Auto-login is not allowed for site admins.';
+$string['cachedef_plugininfo'] = 'This stores the list of plugins with mobile addons';
 $string['clickheretolaunchtheapp'] = 'Click here if the app does not open automatically.';
 $string['configmobilecssurl'] = 'A CSS file to customise your mobile app interface.';
 $string['customlangstrings'] = 'Custom language strings';
diff --git a/admin/tool/mobile/version.php b/admin/tool/mobile/version.php
index 4632c5d72a950..d42f1213b9207 100644
--- a/admin/tool/mobile/version.php
+++ b/admin/tool/mobile/version.php
@@ -23,7 +23,7 @@
  */
 
 defined('MOODLE_INTERNAL') || die();
-$plugin->version   = 2016120505; // The current plugin version (Date: YYYYMMDDXX).
+$plugin->version   = 2017041200; // The current plugin version (Date: YYYYMMDDXX).
 $plugin->requires  = 2016112900; // Requires this Moodle version.
 $plugin->component = 'tool_mobile'; // Full name of the plugin (used for diagnostics).
 $plugin->dependencies = array(