update Piwik to version 2.16 (fixes #91)

www/analytics/core/Plugin/ReleaseChannels.php

@@ -0,0 +1,103 @@
+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+namespace Piwik\Plugin;
+
+use Piwik\Config;
+use Piwik\Container\StaticContainer;
+use Piwik\UpdateCheck\ReleaseChannel;
+
+/**
+ * Get release channels that are defined by plugins.
+ */
+class ReleaseChannels
+{
+    /**
+     * @var Manager
+     */
+    private $pluginManager;
+
+    public function __construct(Manager $pluginManager)
+    {
+        $this->pluginManager = $pluginManager;
+    }
+
+    /**
+     * @return ReleaseChannel[]
+     */
+    public function getAllReleaseChannels()
+    {
+        $classNames = $this->pluginManager->findMultipleComponents('ReleaseChannel', 'Piwik\\UpdateCheck\\ReleaseChannel');
+        $channels = array();
+
+        foreach ($classNames as $className) {
+            $channels[] = StaticContainer::get($className);
+        }
+
+        usort($channels, function (ReleaseChannel $a, ReleaseChannel $b) {
+            if ($a->getOrder() === $b->getOrder()) {
+                return 0;
+            }
+
+            return ($a->getOrder() < $b->getOrder()) ? -1 : 1;
+        });
+
+        return $channels;
+    }
+
+    /**
+     * @return ReleaseChannel
+     */
+    public function getActiveReleaseChannel()
+    {
+        $channel = Config::getInstance()->General['release_channel'];
+        $channel = $this->factory($channel);
+
+        if (!empty($channel)) {
+            return $channel;
+        }
+
+        $channels = $this->getAllReleaseChannels();
+
+        // we default to the one with lowest id
+        return reset($channels);
+    }
+
+    /**
+     * Sets the given release channel in config but does not save id. $config->forceSave() still needs to be called
+     * @param string $channel
+     */
+    public function setActiveReleaseChannelId($channel)
+    {
+        $general = Config::getInstance()->General;
+        $general['release_channel'] = $channel;
+        Config::getInstance()->General = $general;
+    }
+
+    public function isValidReleaseChannelId($releaseChannelId)
+    {
+        $channel = $this->factory($releaseChannelId);
+
+        return !empty($channel);
+    }
+
+    /**
+     * @param string $releaseChannelId
+     * @return ReleaseChannel
+     */
+    private function factory($releaseChannelId)
+    {
+        $releaseChannelId = strtolower($releaseChannelId);
+
+        foreach ($this->getAllReleaseChannels() as $releaseChannel) {
+            if ($releaseChannelId === strtolower($releaseChannel->getId())) {
+                return $releaseChannel;
+            }
+        }
+    }
+}