diff --git a/admin/index.php b/admin/index.php
index a320e25..f1cc487 100644
--- a/admin/index.php
+++ b/admin/index.php
@@ -16,104 +16,103 @@
  * Auteurs de STUdS (projet initial) : Guilhem BORGHESI (borghesi@unistra.fr) et Raphaël DROZ
  * Auteurs de Framadate/OpenSondage : Framasoft (https://github.com/framasoft)
  */
-namespace Framadate;
+
+use Framadate\Services\AdminPollService;
+use Framadate\Services\LogService;
+use Framadate\Services\PollService;
+use Framadate\Services\SuperAdminService;
+use Framadate\Utils;
 
 include_once __DIR__ . '/../app/inc/init.php';
 include_once __DIR__ . '/../bandeaux.php';
 
+/* Services */
+/*----------*/
+$logService = new LogService();
+$pollService = new PollService($connect, $logService);
+$adminPollService = new AdminPollService($connect, $pollService, $logService);
+$superAdminService = new SuperAdminService($connect);
+
 // Ce fichier index.php se trouve dans le sous-repertoire ADMIN de Studs. Il sert à afficher l'intranet de studs
 // pour modifier les sondages directement sans avoir reçu les mails. C'est l'interface d'aministration
 // de l'application.
 
 // Affichage des balises standards
-Utils::print_header( _('Polls administrator') );
+Utils::print_header(_('Polls administrator'));
 bandeau_titre(_('Polls administrator'));
 
-$sondage=$connect->Execute('SELECT * FROM sondage');
+$polls = $superAdminService->findAllPolls();
+
+echo '<form action="' . Utils::get_server_name() . 'admin/index.php" method="POST">' . "\n";
 
-echo'
-    <form action="' . Utils::get_server_name() . 'admin/index.php" method="POST">'."\n";
 // Test et affichage du bouton de confirmation en cas de suppression de sondage
-while($dsondage = $sondage->FetchNextObject(false)) {
-    if (Utils::issetAndNoEmpty('supprimersondage'.$dsondage->id_sondage) === true) {
+foreach ($polls as $poll) {
+    if (!empty($_POST['supprimersondage' . $poll->id])) {
         echo '
         <div class="alert alert-warning text-center">
-            <h3>'. _("Confirm removal of the poll ") .'"'.$dsondage->id_sondage.'</h3>
-            <p><button class="btn btn-default" type="submit" value="1" name="annullesuppression">'._('Keep this poll!').'</button>
-            <button type="submit" name="confirmesuppression'.$dsondage->id_sondage.'" value="1" class="btn btn-danger">'._('Remove this poll!').'</button></p>
+            <h3>' . _("Confirm removal of the poll ") . '"' . $poll->id . '</h3>
+            <p><button class="btn btn-default" type="submit" value="1" name="annullesuppression">' . _('Keep this poll!') . '</button>
+            <button type="submit" name="confirmesuppression' . $poll->id . '" value="1" class="btn btn-danger">' . _('Remove this poll!') . '</button></p>
         </div>';
     }
 
     // Traitement de la confirmation de suppression
-    if (Utils::issetAndNoEmpty('confirmesuppression'.$dsondage->id_sondage) === true) {
+    if (!empty($_POST['confirmesuppression' . $poll->id])) {
         // On inclut la routine de suppression
         $date = date('H:i:s d/m/Y');
 
-        if (Utils::remove_sondage($connect, $dsondage->id_sondage)) {
-           // ecriture des traces dans le fichier de logs
-           error_log($date . " SUPPRESSION: $dsondage->id_sondage\t$dsondage->format\t$dsondage->nom_admin\t$dsondage->mail_admin\n", 3, 'logs_studs.txt');
-        }
+        $adminPollService->deleteEntirePoll($poll->id);
     }
 }
 
-$sondage=$connect->Execute('SELECT * FROM sondage WHERE date_fin > DATE_SUB(now(), INTERVAL 3 MONTH) ORDER BY date_fin ASC');
-$nbsondages=$sondage->RecordCount();
+$btn_logs = (is_readable('../' . LOG_FILE)) ? '<a role="button" class="btn btn-default btn-xs pull-right" href="' . Utils::get_server_name() . LOG_FILE . '">' . _("Logs") . '</a>' : '';
 
-$btn_logs = (is_readable('logs_studs.txt')) ? '<a role="button" class="btn btn-default btn-xs pull-right" href="'.str_replace('/admin','', Utils::get_server_name()).'admin/logs_studs.txt">'. _("Logs") .'</a>' : '';
-
-echo '<p>' . $nbsondages. ' ' . _("polls in the database at this time") . $btn_logs .'</p>'."\n";
+echo '<p>' . count($polls) . ' ' . _("polls in the database at this time") . $btn_logs . '</p>' . "\n";
 
 // tableau qui affiche tous les sondages de la base
 echo '<table class="table table-bordered">
     <tr align="center">
-        <th scope="col">'. _('Poll ID') .'</th>
-        <th scope="col">'. _('Format') .'</th>
-        <th scope="col">'. _('Title') .'</th>
-        <th scope="col">'. _('Author') .'</th>
-        <th scope="col">'. _('Email') .'</th>
-        <th scope="col">'. _('Expiration\'s date') .'</th>
-        <th scope="col">'. _('Users') .'</th>
-        <th scope="col" colspan="3">'. _('Actions') .'</th>
-    </tr>'."\n";
+        <th scope="col">' . _('Poll ID') . '</th>
+        <th scope="col">' . _('Format') . '</th>
+        <th scope="col">' . _('Title') . '</th>
+        <th scope="col">' . _('Author') . '</th>
+        <th scope="col">' . _('Email') . '</th>
+        <th scope="col">' . _('Expiration\'s date') . '</th>
+        <th scope="col">' . _('Users') . '</th>
+        <th scope="col" colspan="3">' . _('Actions') . '</th>
+    </tr>' . "\n";
 
 $i = 0;
-while($dsondage = $sondage->FetchNextObject(false)) {
-    /* possible en 1 bonne requête dans $sondage */
-    $subjects = $connect->Execute("SELECT * FROM sujet_studs WHERE id_sondage='$dsondage->id_sondage'");
-    $dsujets = $subjects->FetchObject(false);
+foreach ($polls as $poll) {
+    $nb_users = $pollService->countVotesByPollId($poll->id);
 
-    $user_studs = $connect->Execute("SELECT * from user_studs WHERE id_sondage='$dsondage->id_sondage'");
-    $nb_users = $user_studs->RecordCount();
-
-    echo '
-    <tr align="center">
-        <td>'.$dsondage->id_sondage.'</td>
-        <td>'.$dsondage->format.'</td>
-        <td>'. stripslashes($dsondage->titre).'</td>
-        <td>'.stripslashes($dsondage->nom_admin).'</td>
-        <td>'.stripslashes($dsondage->mail_admin).'</td>';
-
-    if (strtotime($dsondage->date_fin) > time()) {
-        echo '<td>'.date('d/m/y', strtotime($dsondage->date_fin)).'</td>';
+    if ($poll->format === 'D') {
+        $format_html = '<span class="glyphicon glyphicon-calendar" aria-hidden="true"></span><span class="sr-only">'. _('Date').'</span>';
     } else {
-        echo '<td><span class="text-danger">'
-            . date('d/m/y', strtotime($dsondage->date_fin))
-            . '</span></td>';
+        $format_html = '<span class="glyphicon glyphicon-list-alt" aria-hidden="true"></span><span class="sr-only">'. _('Classic').'</span>';
     }
     echo '
-        <td>'.$nb_users.'</td>
-        <td><a href="' . Utils::getUrlSondage($dsondage->id_sondage) . '" class="btn btn-link" title="'. _('See the poll') .'"><span class="glyphicon glyphicon-eye-open"></span><span class="sr-only">' . _('See the poll') . '</span></a></td>
-        <td><a href="' . Utils::getUrlSondage($dsondage->id_sondage_admin, true) . '" class="btn btn-link" title="'. _('Change the poll') .'"><span class="glyphicon glyphicon-pencil"></span><span class="sr-only">' . _("Change the poll") . '</span></a></td>
-        <td><button type="submit" name="supprimersondage'.$dsondage->id_sondage.'" value="'. _('Remove the poll') .'" class="btn btn-link" title="'. _("Remove the poll") .'"><span class="glyphicon glyphicon-trash text-danger"></span><span class="sr-only">' . _('Remove the poll') . '</span></td>
-    </tr>'."\n";
+    <tr align="center">
+        <td>' . $poll->id . '</td>
+        <td>' . $format_html . '</td>
+        <td>' . htmlentities($poll->title) . '</td>
+        <td>' . htmlentities($poll->admin_name) . '</td>
+        <td>' . htmlentities($poll->admin_mail) . '</td>';
+
+    if (strtotime($poll->end_date) > time()) {
+        echo '<td>' . date('d/m/y', strtotime($poll->end_date)) . '</td>';
+    } else {
+        echo '<td><span class="text-danger">' . date('d/m/y', strtotime($poll->end_date)) . '</span></td>';
+    }
+    echo '
+        <td>' . $nb_users . '</td>
+        <td><a href="' . Utils::getUrlSondage($poll->id) . '" class="btn btn-link" title="' . _('See the poll') . '"><span class="glyphicon glyphicon-eye-open"></span><span class="sr-only">' . _('See the poll') . '</span></a></td>
+        <td><a href="' . Utils::getUrlSondage($poll->admin_id, true) . '" class="btn btn-link" title="' . _('Change the poll') . '"><span class="glyphicon glyphicon-pencil"></span><span class="sr-only">' . _("Change the poll") . '</span></a></td>
+        <td><button type="submit" name="supprimersondage' . $poll->id . '" value="' . _('Remove the poll') . '" class="btn btn-link" title="' . _("Remove the poll") . '"><span class="glyphicon glyphicon-trash text-danger"></span><span class="sr-only">' . _('Remove the poll') . '</span></td>
+    </tr>' . "\n";
     ++$i;
 }
 
-echo '</table></form>'."\n";
+echo '</table></form>' . "\n";
 
 bandeau_pied(true);
-
-// si on annule la suppression, rafraichissement de la page
-/*if (Utils::issetAndNoEmpty('annulesuppression') === true) {
-    // TODO
-}*/
diff --git a/adminstuds.php b/adminstuds.php
index 9883e42..0ab3563 100644
--- a/adminstuds.php
+++ b/adminstuds.php
@@ -36,7 +36,7 @@ $editingVoteId = 0;
 /* Services */
 /*----------*/
 
-$logService = new LogService(LOG_FILE);
+$logService = new LogService();
 $pollService = new PollService($connect, $logService);
 $adminPollService = new AdminPollService($connect, $pollService, $logService);
 $inputService = new InputService();
diff --git a/app/classes/Framadate/FramaDB.php b/app/classes/Framadate/FramaDB.php
index 35797d1..15ae3ce 100644
--- a/app/classes/Framadate/FramaDB.php
+++ b/app/classes/Framadate/FramaDB.php
@@ -274,4 +274,21 @@ class FramaDB {
         return $prepared->fetchAll();
     }
 
+    public function findAllPolls() {
+        $prepared = $this->prepare('SELECT * FROM ' . Utils::table('poll') . ' ORDER BY end_date ASC');
+        $prepared->execute([]);
+
+        return $prepared->fetchAll();
+    }
+
+    public function countVotesByPollId($poll_id) {
+        $prepared = $this->prepare('SELECT count(1) nb FROM ' . Utils::table('vote') . ' WHERE poll_id = ?');
+
+        $prepared->execute([$poll_id]);
+        $result = $prepared->fetch();
+        $prepared->closeCursor();
+
+        return $result->nb;
+    }
+
 }
diff --git a/app/classes/Framadate/Services/LogService.php b/app/classes/Framadate/Services/LogService.php
index 61c5e79..8ccb48f 100644
--- a/app/classes/Framadate/Services/LogService.php
+++ b/app/classes/Framadate/Services/LogService.php
@@ -8,10 +8,7 @@ namespace Framadate\Services;
  */
 class LogService {
 
-    private $output;
-
-    function __construct($output) {
-        $this->output = $output;
+    function __construct() {
     }
 
     /**
@@ -21,7 +18,7 @@ class LogService {
      * @param $message string some message
      */
     function log($tag, $message) {
-        error_log(date('Ymd His') . ' [' . $tag . '] ' . $message . "\n", 3, $this->output);
+        error_log(date('Ymd His') . ' [' . $tag . '] ' . $message . "\n", 3, LOG_FILE);
     }
 
 }
diff --git a/app/classes/Framadate/Services/PollService.php b/app/classes/Framadate/Services/PollService.php
index 828be5a..949afcb 100644
--- a/app/classes/Framadate/Services/PollService.php
+++ b/app/classes/Framadate/Services/PollService.php
@@ -75,6 +75,10 @@ class PollService {
         return $this->connect->insertComment($poll_id, $name, $comment);
     }
 
+    public function countVotesByPollId($poll_id) {
+        return $this->connect->countVotesByPollId($poll_id);
+    }
+
     function computeBestChoices($votes) {
         $result = [];
         foreach ($votes as $vote) {
diff --git a/app/classes/Framadate/Services/SuperAdminService.php b/app/classes/Framadate/Services/SuperAdminService.php
new file mode 100644
index 0000000..bea7b14
--- /dev/null
+++ b/app/classes/Framadate/Services/SuperAdminService.php
@@ -0,0 +1,29 @@
+<?php
+namespace Framadate\Services;
+
+use Framadate\FramaDB;
+
+/**
+ * The class provides action for application administrators.
+ *
+ * @package Framadate\Services
+ */
+class SuperAdminService {
+
+    private $connect;
+
+    function __construct(FramaDB $connect) {
+        $this->connect = $connect;
+    }
+
+    /**
+     * Return the list of all polls.
+     *
+     * @return array All the polls
+     */
+    public function findAllPolls() {
+        return $this->connect->findAllPolls();
+    }
+
+}
+ 
\ No newline at end of file
diff --git a/choix_autre.php b/choix_autre.php
index 95ba3cd..e9bd1d1 100644
--- a/choix_autre.php
+++ b/choix_autre.php
@@ -27,7 +27,7 @@ include_once __DIR__ . '/app/inc/init.php';
 
 /* Service */
 /*---------*/
-$logService = new LogService(LOG_FILE);
+$logService = new LogService();
 $pollService = new PollService($connect, $logService);
 $mailService = new MailService($config['use_smtp']);
 $purgeService = new PurgeService($connect, $logService);
diff --git a/choix_date.php b/choix_date.php
index 5170306..bfe0790 100644
--- a/choix_date.php
+++ b/choix_date.php
@@ -28,7 +28,7 @@ include_once __DIR__ . '/app/inc/init.php';
 
 /* Service */
 /*---------*/
-$logService = new LogService(LOG_FILE);
+$logService = new LogService();
 $pollService = new PollService($connect, $logService);
 $mailService = new MailService($config['use_smtp']);
 $purgeService = new PurgeService($connect, $logService);
diff --git a/exportcsv.php b/exportcsv.php
index 34b4155..f5efcd7 100644
--- a/exportcsv.php
+++ b/exportcsv.php
@@ -36,7 +36,7 @@ $poll = null;
 /* Services */
 /*----------*/
 
-$logService = new LogService(LOG_FILE);
+$logService = new LogService();
 $pollService = new PollService($connect, $logService);
 
 /* PAGE */
diff --git a/studs.php b/studs.php
index b7c91c8..b04ce05 100644
--- a/studs.php
+++ b/studs.php
@@ -36,7 +36,7 @@ $editingVoteId = 0;
 /* Services */
 /*----------*/
 
-$logService = new LogService(LOG_FILE);
+$logService = new LogService();
 $pollService = new PollService($connect, $logService);
 $inputService = new InputService();
 $mailService = new MailService($config['use_smtp']);