--- /dev/null
+<?php
+/**
+ * Piwik plugin.
+ * Adds tracking code on each page.
+ */
+
+/**
+ * Initialization function.
+ * It will be called when the plugin is loaded.
+ * This function can be used to return a list of initialization errors.
+ *
+ * @param $conf ConfigManager instance.
+ *
+ * @return array List of errors (optional).
+ */
+function piwik_init($conf)
+{
+ $piwikUrl = $conf->get('plugins.PIWIK_URL');
+ $piwikSiteid = $conf->get('plugins.PIWIK_SITEID');
+ if (empty($piwikUrl) || empty($piwikSiteid)) {
+ $error = 'Piwik plugin error: ' .
+ 'Please define PIWIK_URL and PIWIK_SITEID in the plugin administration page.';
+ return array($error);
+ }
+}
+
+/**
+ * Hook render_footer.
+ * Executed on every page redering.
+ *
+ * Template placeholders:
+ * - text
+ * - endofpage
+ * - js_files
+ *
+ * Data:
+ * - _PAGE_: current page
+ * - _LOGGEDIN_: true/false
+ *
+ * @param array $data data passed to plugin
+ *
+ * @return array altered $data.
+ */
+function hook_piwik_render_footer($data, $conf)
+{
+ $piwikUrl = $conf->get('plugins.PIWIK_URL');
+ $piwikSiteid = $conf->get('plugins.PIWIK_SITEID');
+ if (empty($piwikUrl) || empty($piwikSiteid)) {
+ return $data;
+ }
+
+ // Free elements at the end of the page.
+ $data['endofpage'][] = '<!-- Piwik -->' .
+'<script type="text/javascript">' .
+' var _paq = _paq || [];' .
+' _paq.push([\'trackPageView\']);' .
+' _paq.push([\'enableLinkTracking\']);' .
+' (function() {' .
+' var u="//' . $piwikUrl . '/";' .
+' _paq.push([\'setTrackerUrl\', u+\'piwik.php\']);' .
+' _paq.push([\'setSiteId\', \'' . $piwikSiteid . '\']);' .
+' var d=document, g=d.createElement(\'script\'), s=d.getElementsByTagName(\'script\')[0];' .
+' g.type=\'text/javascript\'; g.async=true; g.defer=true; g.src=u+\'piwik.js\'; s.parentNode.insertBefore(g,s);' .
+' })();' .
+'</script>' .
+'<noscript><p><img src="//' . $piwikUrl . '/piwik.php?idsite=' . $piwikSiteid . '" style="border:0;" alt="" /></p></noscript>' .
+'<!-- End Piwik Code -->';
+
+ return $data;
+}
+