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@@ -0,0 +1,71 @@
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+<?php
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+/**
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+ * Piwik plugin.
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+ * Adds tracking code on each page.
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+ */
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+
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+/**
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+ * Initialization function.
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+ * It will be called when the plugin is loaded.
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+ * This function can be used to return a list of initialization errors.
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+ *
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+ * @param $conf ConfigManager instance.
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+ *
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+ * @return array List of errors (optional).
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+ */
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+function piwik_init($conf)
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+{
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+ $piwikUrl = $conf->get('plugins.PIWIK_URL');
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+ $piwikSiteid = $conf->get('plugins.PIWIK_SITEID');
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+ if (empty($piwikUrl) || empty($piwikSiteid)) {
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+ $error = 'Piwik plugin error: ' .
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+ 'Please define PIWIK_URL and PIWIK_SITEID in the plugin administration page.';
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+ return array($error);
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+ }
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+}
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+
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+/**
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+ * Hook render_footer.
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+ * Executed on every page redering.
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+ *
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+ * Template placeholders:
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+ * - text
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+ * - endofpage
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+ * - js_files
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+ *
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+ * Data:
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+ * - _PAGE_: current page
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+ * - _LOGGEDIN_: true/false
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+ *
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+ * @param array $data data passed to plugin
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+ *
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+ * @return array altered $data.
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+ */
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+function hook_piwik_render_footer($data, $conf)
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+{
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+ $piwikUrl = $conf->get('plugins.PIWIK_URL');
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+ $piwikSiteid = $conf->get('plugins.PIWIK_SITEID');
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+ if (empty($piwikUrl) || empty($piwikSiteid)) {
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+ return $data;
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+ }
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+
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+ // Free elements at the end of the page.
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+ $data['endofpage'][] = '<!-- Piwik -->' .
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+'<script type="text/javascript">' .
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+' var _paq = _paq || [];' .
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+' _paq.push([\'trackPageView\']);' .
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+' _paq.push([\'enableLinkTracking\']);' .
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+' (function() {' .
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+' var u="//' . $piwikUrl . '/";' .
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+' _paq.push([\'setTrackerUrl\', u+\'piwik.php\']);' .
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+' _paq.push([\'setSiteId\', \'' . $piwikSiteid . '\']);' .
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+' var d=document, g=d.createElement(\'script\'), s=d.getElementsByTagName(\'script\')[0];' .
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+' g.type=\'text/javascript\'; g.async=true; g.defer=true; g.src=u+\'piwik.js\'; s.parentNode.insertBefore(g,s);' .
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+' })();' .
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+'</script>' .
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+'<noscript><p><img src="//' . $piwikUrl . '/piwik.php?idsite=' . $piwikSiteid . '" style="border:0;" alt="" /></p></noscript>' .
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+'<!-- End Piwik Code -->';
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+
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+ return $data;
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+}
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+
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