New features:

* Charts System will allow users to see statistics about their Drupal site with Charts.

charts_system/charts_system.inc

+<?php
+// $Id$
+/**
+ * @author Bruno Massa http://drupal.org/user/67164
+ * @file charts_system.inc
+ * Use Charts for Drupal administration
+ */
+
+/**
+ * Page callback.
+ */
+function _charts_system_charts($ctype = 'nodes') {
+  $output = '';
+
+  switch ($ctype) {
+    case 'nodes':
+      $output  = _charts_system_generate(
+        t('Total'),
+        'SELECT COUNT(*) AS count, type AS name
+        FROM {node}
+        GROUP BY type
+        ORDER BY type'
+      );
+      $output .= _charts_system_generate(
+        t('Published'),
+        "SELECT COUNT(*) AS count, type AS name
+        FROM {node}
+        WHERE status = '1'
+        GROUP BY type
+        ORDER BY type"
+      );
+      $output .= _charts_system_generate(
+        t('Unpublished'),
+        "SELECT COUNT(*) AS count, type AS name
+        FROM {node}
+        WHERE status = '0'
+        GROUP BY type
+        ORDER BY type"
+      );
+      break;
+
+    case 'users':
+      $output  = _charts_system_generate(
+        t('Users Per Role'),
+        'SELECT COUNT(*) AS count, r.name AS name
+        FROM {users_roles} ur
+        LEFT JOIN {users} u ON ur.uid = u.uid
+        LEFT JOIN {role} r ON r.rid = ur.rid
+        GROUP BY r.rid
+        ORDER BY r.name'
+      );
+      $output .= _charts_system_generate(
+        t('Users Status'),
+        'SELECT COUNT(*) AS count, status AS name
+        FROM {users}
+        WHERE uid != 0
+        GROUP BY status
+        ORDER BY status',
+        '_charts_system_user_status_label'
+      );
+      break;
+
+    case 'watchdog':
+      $output  = _charts_system_generate(
+        t('Watchdog Messages'),
+        'SELECT COUNT(*) AS count, type AS name
+        FROM {watchdog}
+        GROUP BY type
+        ORDER BY type'
+      );
+      $output .= _charts_system_generate(
+        t('Message Severity'),
+        'SELECT COUNT(*) AS count, severity AS name
+        FROM {watchdog}
+        GROUP BY severity
+        ORDER BY severity',
+        '_charts_system_watchdog_severity_label'
+      );
+      break;
+  }
+
+  return '<div id="charts-system">'. $output .'</div>';
+}
+
+/**
+ * Translate the user status label code to a string
+ *
+ * @param $title
+ *   String. The chart title
+ * @param $sql
+ *   String. The SQL statement to be executed
+ * @param $callback
+ *   String (optional). When a string is given, use it as the
+ *   parser of the results from SQL. Its important when the
+ *   results are coded in to DB to ocupy less space, and should
+ *   be decoded.
+ * @return
+ *   String. The HTML chart when all data is fine or a blank string
+ */
+function _charts_system_generate($title, $sql, $callback = NULL) {
+  $results = db_query($sql);
+
+  while ($result = db_fetch_array($results)) {
+    if (!empty($callback)) {
+      $result['name'] = $callback($result['name']);
+    }
+
+    $data[] = array(
+      '#value'  => $result['count'],
+      '#label'  => $result['name'] .': '. $result['count']
+    );
+  }
+
+  if (!empty($data)) {
+    $chart    = array();
+    $chart[0] = $data;
+    $chart['#title']    = $title;
+    $chart['#type']     = 'pie2D';
+
+    return charts_chart($chart);
+  }
+
+  return '';
+}
+
+/**
+ * Translate the user status label code to a string
+ *
+ * @param status
+ *   Number. 1 for Active and 0 for Blocked
+ * @return
+ *   String. The given status
+ */
+function _charts_system_user_status_label($status) {
+  return $status ? t('Active') : t('Blocked');
+}
+
+/**
+ * Translate the message severity label code to a string
+ *
+ * @param status
+ *   Number. According to watchdog constants, the severity level
+ * @return
+ *   String. The given severity
+ */
+function _charts_system_watchdog_severity_label($severity) {
+  switch ($severity) {
+    case WATCHDOG_NOTICE:
+      return t('Notice');
+
+    case WATCHDOG_WARNING:
+      return t('Warning');
+
+    case WATCHDOG_ERROR:
+      return t('Error');
+  }
+}

charts_system/charts_system.info

+; $Id$
+core            = "6.x"
+dependencies[]  = charts
+description     = "Use Charts for Drupal administration"
+name            = "Charts System"
\ No newline at end of file

charts_system/charts_system.module

+<?php
+// $Id$
+/**
+ * @author Bruno Massa http://drupal.org/user/67164
+ * @file charts_system.module
+ * Use Charts for Drupal administration
+ */
+
+/**
+ * Implementation of hook_menu().
+ */
+function charts_system_menu() {
+  $items['admin/reports/charts'] = array(
+    'file'            => 'charts_system.inc',
+    'page callback'   => '_charts_system_charts',
+    'page arguments'  => array('nodes'),
+    'title'           => 'Charts'
+  );
+  $items['admin/reports/charts/nodes'] = array(
+    'file'            => 'charts_system.inc',
+    'page callback'   => '_charts_system_charts',
+    'page arguments'  => array('nodes'),
+    'title'           => 'Nodes',
+    'type'            => MENU_DEFAULT_LOCAL_TASK
+  );
+  $items['admin/reports/charts/users'] = array(
+    'file'            => 'charts_system.inc',
+    'page callback'   => '_charts_system_charts',
+    'page arguments'  => array('users'),
+    'title'           => 'Users',
+    'type'            => MENU_LOCAL_TASK
+  );
+  $items['admin/reports/charts/watchdog'] = array(
+    'file'            => 'charts_system.inc',
+    'page callback'   => '_charts_system_charts',
+    'page arguments'  => array('watchdog'),
+    'title'           => 'Watchdog',
+    'type'            => MENU_LOCAL_TASK
+  );
+
+  return $items;
+}