2 files changed, 75 insertions, 0 deletions

diff --git a/plugins/piwik/piwik.meta b/plugins/piwik/piwik.meta
new file mode 100644
index 00000000..20b9628e
--- /dev/null
+++ b/plugins/piwik/piwik.meta
@@ -0,0 +1,4 @@
+description="A plugin that adds Piwik tracking code to Shaarli pages."
+parameters="PIWIK_URL;PIWIK_SITEID"
+parameter.PIWIK_URL="Piwik URL"
+parameter.PIWIK_SITEID="Piwik site ID"
diff --git a/plugins/piwik/piwik.php b/plugins/piwik/piwik.php
new file mode 100644
index 00000000..7c44909c
--- /dev/null
+++ b/plugins/piwik/piwik.php
@@ -0,0 +1,71 @@
+<?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;
+}
+