redo shift signoff and icons for delete/confirm/acknowledgment questions

12 files changed, 197 insertions, 161 deletions

diff --git a/includes/controller/angeltypes_controller.php b/includes/controller/angeltypes_controller.php
index a47c1340..621b5cbd 100644
--- a/includes/controller/angeltypes_controller.php
+++ b/includes/controller/angeltypes_controller.php
@@ -40,11 +40,13 @@ function angeltypes_controller()
  * Path to angeltype view.
  *
  * @param int $angeltype_id AngelType id
+ * @param array $params additional params
  * @return string
  */
-function angeltype_link($angeltype_id)
+function angeltype_link($angeltype_id, $params = [])
 {
-    return page_link_to('angeltypes', ['action' => 'view', 'angeltype_id' => $angeltype_id]);
+    $params = array_merge(['action' => 'view', 'angeltype_id' => $angeltype_id], $params);
+    return page_link_to('angeltypes', $params);
 }
 
 /**
diff --git a/includes/controller/shift_entries_controller.php b/includes/controller/shift_entries_controller.php
index c28a3e9c..0b37be6c 100644
--- a/includes/controller/shift_entries_controller.php
+++ b/includes/controller/shift_entries_controller.php
@@ -233,58 +233,49 @@ function shift_entry_add_controller()
 }
 
 /**
- * Remove somebody from a shift.
+ * Load a shift entry from get parameter entry_id.
  */
-function shift_entry_delete_controller()
-{
-    global $privileges, $user;
+function shift_entry_load() {
     $request = request();
 
     if (!$request->has('entry_id') || !test_request_int('entry_id')) {
         redirect(page_link_to('user_shifts'));
     }
-    $entry_id = $request->input('entry_id');
-
-    $shift_entry_source = DB::selectOne('
-        SELECT
-            `User`.`Nick`,
-            `User`.`Gekommen`,
-            `ShiftEntry`.`Comment`,
-            `ShiftEntry`.`UID`,
-            `ShiftTypes`.`name`,
-            `Shifts`.*,
-            `Room`.`Name`,
-            `AngelTypes`.`name` AS `angel_type`,
-            `AngelTypes`.`id` AS `angeltype_id`
-        FROM `ShiftEntry`
-        JOIN `User` ON (`User`.`UID`=`ShiftEntry`.`UID`)
-        JOIN `AngelTypes` ON (`ShiftEntry`.`TID` = `AngelTypes`.`id`)
-        JOIN `Shifts` ON (`ShiftEntry`.`SID` = `Shifts`.`SID`)
-        JOIN `ShiftTypes` ON (`ShiftTypes`.`id` = `Shifts`.`shifttype_id`)
-        JOIN `Room` ON (`Shifts`.`RID` = `Room`.`RID`)
-        WHERE `ShiftEntry`.`id`=?',
-        [$entry_id]
-    );
-    if (!empty($shift_entry_source)) {
-        if (!in_array('user_shifts_admin', $privileges) && (!in_array('shiftentry_edit_angeltype_supporter',
-                    $privileges) || !User_is_AngelType_supporter($user, AngelType($shift_entry_source['angeltype_id'])))
-        ) {
-            redirect(page_link_to('user_shifts'));
-        }
+    $shiftEntry = ShiftEntry($request->input('entry_id'));
+    if($shiftEntry == null) {
+        error(_('Shift entry not found.'));
+        redirect(page_link_to('user_shifts'));
+    }
+    
+    return $shiftEntry;
+}
 
-        ShiftEntry_delete($entry_id);
+/**
+ * Remove somebody from a shift.
+ */
+function shift_entry_delete_controller()
+{
+    global $privileges, $user;
+    $request = request();
+    $shiftEntry = shift_entry_load();
 
-        engelsystem_log(
-            'Deleted ' . User_Nick_render($shift_entry_source) . '\'s shift: ' . $shift_entry_source['name']
-            . ' at ' . $shift_entry_source['Name']
-            . ' from ' . date('Y-m-d H:i', $shift_entry_source['start'])
-            . ' to ' . date('Y-m-d H:i', $shift_entry_source['end'])
-            . ' as ' . $shift_entry_source['angel_type']
-        );
-        success(_('Shift entry deleted.'));
-    } else {
-        error(_('Entry not found.'));
+    $shift = Shift($shiftEntry['SID']);
+    $angeltype = AngelType($shiftEntry['TID']);
+    $signout_user = User($shiftEntry['UID']);
+    if(!Shift_signout_allowed($shift, $angeltype, $signout_user)) {
+        error(_('You are not allowed to remove this shift entry. If neccessary, ask your supporter or heaven to do so.'));
+        redirect(user_link($signout_user));
+    }
+    
+    if($request->has('continue')) {
+        ShiftEntry_delete($shiftEntry);
+        success(_('Shift entry removed.'));
+        redirect(shift_link($shift));
     }
 
-    redirect(shift_link($shift_entry_source));
+    if($user['UID'] == $signout_user['UID']) {
+        return ShiftEntry_delete_view($shiftEntry, $shift, $angeltype, $signout_user);
+    }
+    
+    return ShiftEntry_delete_view_admin($shiftEntry, $shift, $angeltype, $signout_user);
 }
diff --git a/includes/controller/user_angeltypes_controller.php b/includes/controller/user_angeltypes_controller.php
index 8f21fa32..543ba150 100644
--- a/includes/controller/user_angeltypes_controller.php
+++ b/includes/controller/user_angeltypes_controller.php
@@ -90,13 +90,7 @@ function user_angeltypes_confirm_all_controller()
         redirect(page_link_to('angeltypes'));
     }
 
-    $user_angeltype = UserAngelType_by_User_and_AngelType($user, $angeltype);
-    if ($user_angeltype == null) {
-        error(_('User angeltype doesn\'t exist.'));
-        redirect(page_link_to('angeltypes'));
-    }
-
-    if (!in_array('admin_user_angeltypes', $privileges) && !$user_angeltype['supporter']) {
+    if (!in_array('admin_user_angeltypes', $privileges) && !User_is_AngelType_supporter($user, $angeltype)) {
         error(_('You are not allowed to confirm all users for this angeltype.'));
         redirect(page_link_to('angeltypes'));
     }
diff --git a/includes/model/ShiftEntry_model.php b/includes/model/ShiftEntry_model.php
index bcc28f05..01b2369e 100644
--- a/includes/model/ShiftEntry_model.php
+++ b/includes/model/ShiftEntry_model.php
@@ -134,13 +134,26 @@ function ShiftEntry($shift_entry_id)
 /**
  * Delete a shift entry.
  *
- * @param int $shift_entry_id
+ * @param array $shiftEntry
  */
-function ShiftEntry_delete($shift_entry_id)
+function ShiftEntry_delete($shiftEntry)
 {
-    $shift_entry = ShiftEntry($shift_entry_id);
-    mail_shift_removed(User($shift_entry['UID']), Shift($shift_entry['SID']));
+    mail_shift_removed(User($shiftEntry['UID']), Shift($shiftEntry['SID']));
     DB::delete('DELETE FROM `ShiftEntry` WHERE `id` = ?', [$shift_entry_id]);
+    
+    $signout_user = User($shiftEntry['UID']);
+    $shift = Shift($shiftEntry['SID']);
+    $shifttype = ShiftType($shift['shifttype_id']);
+    $room = Room($shift['RID']);
+    $angeltype = AngelType($shiftEntry['TID']);
+    
+    engelsystem_log(
+        'Shift signout: '. User_Nick_render($signout_user) . ' from shift ' . $shifttype['name']
+        . ' at ' . $room['Name']
+        . ' from ' . date('Y-m-d H:i', $shift['start'])
+        . ' to ' . date('Y-m-d H:i', $shift['end'])
+        . ' as ' . $angeltype['name']
+        );
 }
 
 /**
diff --git a/includes/model/Shifts_model.php b/includes/model/Shifts_model.php
index 8cbbe2aa..f3bb042a 100644
--- a/includes/model/Shifts_model.php
+++ b/includes/model/Shifts_model.php
@@ -403,6 +403,38 @@ function Shift_signup_allowed_admin($needed_angeltype, $shift_entries)
 }
 
 /**
+ * Check if an angel can signout from a shift.
+ * 
+ * @param $shift The shift
+ * @param $angeltype The angeltype
+ * @param $signout_user The user that was signed up for the shift
+ * 
+ * @return bool
+ */
+function Shift_signout_allowed($shift, $angeltype, $signout_user) {
+    global $user, $privileges;
+    
+    // user shifts admin can sign out any user at any time
+    if (in_array('user_shifts_admin', $privileges)) {
+        return true;
+    }
+    
+    // angeltype supporter can sign out any user at any time from their supported angeltype
+    if (
+        in_array('shiftentry_edit_angeltype_supporter', $privileges)
+        && User_is_AngelType_supporter($user, $angeltype)
+        ) {
+        return true;
+    }
+    
+    if($signout_user['UID'] == $user['UID'] && $shift['start'] > time() + config('last_unsubscribe') * 3600) {
+        return true;
+    }
+    
+    return false;
+}
+
+/**
  * Check if an angel can sign up for given shift.
  *
  * @param array      $signup_user
diff --git a/includes/pages/user_myshifts.php b/includes/pages/user_myshifts.php
index 836bd566..f605792f 100644
--- a/includes/pages/user_myshifts.php
+++ b/includes/pages/user_myshifts.php
@@ -26,12 +26,12 @@ function user_myshifts()
         && preg_match('/^\d{1,}$/', $request->input('id'))
         && count(DB::select('SELECT `UID` FROM `User` WHERE `UID`=?', [$request->input('id')])) > 0
     ) {
-        $user_id = $request->input('id');
+        $shift_entry_id = $request->input('id');
     } else {
-        $user_id = $user['UID'];
+        $shift_entry_id = $user['UID'];
     }
 
-    $shifts_user = DB::selectOne('SELECT * FROM `User` WHERE `UID`=? LIMIT 1', [$user_id]);
+    $shifts_user = DB::selectOne('SELECT * FROM `User` WHERE `UID`=? LIMIT 1', [$shift_entry_id]);
 
     if ($request->has('reset')) {
         if ($request->input('reset') == 'ack') {
@@ -47,7 +47,7 @@ function user_myshifts()
             button(page_link_to('user_myshifts', ['reset' => 'ack']), _('Continue'), 'btn-danger')
         ]);
     } elseif ($request->has('edit') && preg_match('/^\d+$/', $request->input('edit'))) {
-        $user_id = $request->input('edit');
+        $shift_entry_id = $request->input('edit');
         $shift = DB::selectOne('
                 SELECT
                     `ShiftEntry`.`freeloaded`,
@@ -68,7 +68,7 @@ function user_myshifts()
                 LIMIT 1
             ',
             [
-                $user_id,
+                $shift_entry_id,
                 $shifts_user['UID'],
             ]
         );
@@ -92,7 +92,7 @@ function user_myshifts()
 
                 if ($valid) {
                     ShiftEntry_update([
-                        'id'               => $user_id,
+                        'id'               => $shift_entry_id,
                         'Comment'          => $comment,
                         'freeloaded'       => $freeloaded,
                         'freeload_comment' => $freeload_comment
@@ -124,44 +124,6 @@ function user_myshifts()
         } else {
             redirect(page_link_to('user_myshifts'));
         }
-    } elseif ($request->has('cancel') && preg_match('/^\d+$/', $request->input('cancel'))) {
-        $user_id = $request->input('cancel');
-        $shift = DB::selectOne('
-                SELECT *
-                FROM `Shifts`
-                INNER JOIN `ShiftEntry` USING (`SID`)
-                WHERE `ShiftEntry`.`id`=? AND `UID`=?
-            ',
-            [
-                $user_id,
-                $shifts_user['UID'],
-            ]
-        );
-        if (count($shift) > 0) {
-            if (
-                ($shift['start'] > time() + config('last_unsubscribe') * 3600)
-                || in_array('user_shifts_admin', $privileges)
-            ) {
-                ShiftEntry_delete($user_id);
-
-                $room = Room($shift['RID']);
-                $angeltype = AngelType($shift['TID']);
-                $shifttype = ShiftType($shift['shifttype_id']);
-
-                engelsystem_log(
-                    'Deleted own shift: ' . $shifttype['name']
-                    . ' at ' . $room['Name']
-                    . ' from ' . date('Y-m-d H:i', $shift['start'])
-                    . ' to ' . date('Y-m-d H:i', $shift['end'])
-                    . ' as ' . $angeltype['name']
-                );
-                success(_('Shift canceled.'));
-            } else {
-                error(_('It\'s too late to sign yourself off the shift. If neccessary, ask the dispatcher to do so.'));
-            }
-        } else {
-            redirect(user_link($shifts_user));
-        }
     }
 
     redirect(page_link_to('users', ['action' => 'view', 'user_id' => $shifts_user['UID']]));
diff --git a/includes/pages/user_shifts.php b/includes/pages/user_shifts.php
index 355a7bb6..9ff9ba1a 100644
--- a/includes/pages/user_shifts.php
+++ b/includes/pages/user_shifts.php
@@ -31,8 +31,7 @@ function user_shifts()
 
     // Löschen einzelner Schicht-Einträge (Also Belegung einer Schicht von Engeln) durch Admins
     if ($request->has('entry_id')) {
-        shift_entry_delete_controller();
-        return '';
+        return shift_entry_delete_controller();
     } elseif ($request->has('edit_shift')) {
         return shift_edit_controller();
     } elseif ($request->has('delete_shift')) {
diff --git a/includes/view/AngelTypes_view.php b/includes/view/AngelTypes_view.php
index fa9136c8..a8b34df8 100644
--- a/includes/view/AngelTypes_view.php
+++ b/includes/view/AngelTypes_view.php
@@ -50,14 +50,14 @@ function AngelType_delete_view($angeltype)
     return page_with_title(sprintf(_('Delete angeltype %s'), $angeltype['name']), [
         info(sprintf(_('Do you want to delete angeltype %s?'), $angeltype['name']), true),
         buttons([
-            button(page_link_to('angeltypes'), _('cancel'), 'cancel'),
+            button(page_link_to('angeltypes'), glyph('remove') . _('cancel')),
             button(
                 page_link_to(
                     'angeltypes',
                     ['action' => 'delete', 'angeltype_id' => $angeltype['id'], 'confirmed' => 1]
                 ),
-                _('delete'),
-                'ok'
+                glyph('ok') . _('delete'),
+                'btn-danger'
             )
         ])
     ]);
@@ -153,7 +153,7 @@ function AngelType_view_buttons($angeltype, $user_angeltype, $admin_angeltypes,
         }
         $buttons[] = button(
             page_link_to('user_angeltypes', ['action' => 'delete', 'user_angeltype_id' => $user_angeltype['id']]),
-            _('leave'), 'cancel'
+            _('leave')
         );
     }
 
@@ -442,13 +442,11 @@ function AngelType_view_info(
         $info[] = buttons([
             button(
                 page_link_to('user_angeltypes', ['action' => 'confirm_all', 'angeltype_id' => $angeltype['id']]),
-                _('confirm all'),
-                'ok'
+                glyph('ok') . _('confirm all')
                 ),
             button(
                 page_link_to('user_angeltypes', ['action' => 'delete_all', 'angeltype_id' => $angeltype['id']]),
-                _('deny all'),
-                'cancel'
+                glyph('remove') . _('deny all')
                 )
         ]);
         $info[] = table($table_headers, $members_unconfirmed);
@@ -523,8 +521,7 @@ function AngelTypes_about_view_angeltype($angeltype)
                     'user_angeltypes',
                     ['action' => 'delete', 'user_angeltype_id' => $angeltype['user_angeltype_id']]
                 ),
-                _('leave'),
-                'cancel'
+                _('leave')
             );
         } else {
             $buttons[] = button(
diff --git a/includes/view/ShiftEntry_view.php b/includes/view/ShiftEntry_view.php
index 2e638df6..6dceac10 100644
--- a/includes/view/ShiftEntry_view.php
+++ b/includes/view/ShiftEntry_view.php
@@ -1,6 +1,77 @@
 <?php
 
 /**
+ * Sign off from an user from a shift with admin permissions, asking for ack.
+ *
+ * @param array $shiftEntry
+ * @param array $shift
+ * @param array $angeltype
+ * @param array $signoff_user
+ *
+ * @return string HTML
+ */
+function ShiftEntry_delete_view_admin($shiftEntry, $shift, $angeltype, $signoff_user) {
+    return page_with_title(ShiftEntry_delete_title(), [
+        info(sprintf(
+            _('Do you want to sign off %s from shift %s from %s to %s as %s?'), 
+            User_Nick_render($signoff_user),
+            $shift['name'],
+            date('Y-m-d H:i', $shift['start']),
+            date('Y-m-d H:i', $shift['end']),
+            $angeltype['name']
+        ), true),
+        buttons([
+            button(user_link($signoff_user), glyph('remove') . _('cancel')),
+            button(ShiftEntry_delete_link($shiftEntry, ['continue' => 1]), glyph('ok') . _('delete'), 'btn-danger')
+        ])
+    ]);
+}
+
+/**
+ * Sign off from a shift, asking for ack.
+ * 
+ * @param array $shiftEntry
+ * @param array $shift
+ * @param array $angeltype
+ * @param array $signoff_user
+ * 
+ * @return string HTML
+ */
+function ShiftEntry_delete_view($shiftEntry, $shift, $angeltype, $signoff_user) {
+    return page_with_title(ShiftEntry_delete_title(), [
+        info(sprintf(
+            _('Do you want to sign off from your shift %s from %s to %s as %s?'), 
+            $shift['name'],
+            date('Y-m-d H:i', $shift['start']),
+            date('Y-m-d H:i', $shift['end']),
+            $angeltype['name']
+        ), true),
+        buttons([
+            button(user_link($signoff_user), glyph('remove') . _('cancel')),
+            button(ShiftEntry_delete_link($shiftEntry, ['continue' => 1]), glyph('ok') . _('delete'), 'btn-danger')
+        ])
+    ]);
+}
+
+/**
+ * Link to delete a shift entry.
+ * @param array $shiftEntry
+ * 
+ * @return string URL
+ */
+function ShiftEntry_delete_link($shiftEntry, $params = []) {
+    $params = array_merge(['entry_id' => $shiftEntry['id']], $params);
+    return page_link_to('user_shifts', $params);
+}
+
+/**
+ * Title for deleting a shift entry.
+ */
+function ShiftEntry_delete_title() {
+    return _('Shift sign off');
+}
+
+/**
  * Display form for adding/editing a shift entry.
  *
  * @param string $angel
diff --git a/includes/view/ShiftTypes_view.php b/includes/view/ShiftTypes_view.php
index 74e0d7c0..7dee4521 100644
--- a/includes/view/ShiftTypes_view.php
+++ b/includes/view/ShiftTypes_view.php
@@ -22,14 +22,14 @@ function ShiftType_delete_view($shifttype)
     return page_with_title(sprintf(_('Delete shifttype %s'), $shifttype['name']), [
         info(sprintf(_('Do you want to delete shifttype %s?'), $shifttype['name']), true),
         buttons([
-            button(page_link_to('shifttypes'), _('cancel'), 'cancel'),
+            button(page_link_to('shifttypes'), glyph('remove') . _('cancel')),
             button(
                 page_link_to(
                     'shifttypes',
                     ['action' => 'delete', 'shifttype_id' => $shifttype['id'], 'confirmed' => 1]
                 ),
-                _('delete'),
-                'ok btn-danger'
+                glyph('ok') . _('delete'),
+                'btn-danger'
             )
         ])
     ]);
diff --git a/includes/view/UserAngelTypes_view.php b/includes/view/UserAngelTypes_view.php
index 98f6c3e9..c46c1ee1 100644
--- a/includes/view/UserAngelTypes_view.php
+++ b/includes/view/UserAngelTypes_view.php
@@ -21,8 +21,7 @@ function UserAngelType_update_view($user_angeltype, $user, $angeltype, $supporte
         buttons([
             button(
                 page_link_to('angeltypes', ['action' => 'view', 'angeltype_id' => $angeltype['id']]),
-                _('cancel'),
-                'cancel'
+                glyph('remove') . _('cancel')
             ),
             button(
                 page_link_to('user_angeltypes', [
@@ -31,8 +30,8 @@ function UserAngelType_update_view($user_angeltype, $user, $angeltype, $supporte
                     'supporter'         => ($supporter ? '1' : '0'),
                     'confirmed'         => 1,
                 ]),
-                _('yes'),
-                'ok'
+                glyph('ok') . _('yes'),
+                'btn-primary'
             )
         ])
     ]);
@@ -53,16 +52,15 @@ function UserAngelTypes_delete_all_view($angeltype)
                     'angeltypes',
                     ['action' => 'view', 'angeltype_id' => $angeltype['id']]
                 ),
-                _('cancel'),
-                'cancel'
+                glyph('remove') . _('cancel')
             ),
             button(
                 page_link_to(
                     'user_angeltypes',
                     ['action' => 'delete_all', 'angeltype_id' => $angeltype['id'], 'confirmed' => 1]
                 ),
-                _('yes'),
-                'ok'
+                glyph('ok') . _('yes'),
+                'btn-primary'
             )
         ])
     ]);
@@ -78,13 +76,12 @@ function UserAngelTypes_confirm_all_view($angeltype)
         msg(),
         info(sprintf(_('Do you really want to confirm all users for %s?'), $angeltype['name']), true),
         buttons([
-            button(page_link_to('angeltypes', ['action' => 'view', 'angeltype_id' => $angeltype['id']]), _('cancel'),
-                'cancel'),
+            button(angeltype_link($angeltype['id']), glyph('remove') . _('cancel')),
             button(
                 page_link_to('user_angeltypes',
                     ['action' => 'confirm_all', 'angeltype_id' => $angeltype['id'], 'confirmed' => 1]),
-                _('yes'),
-                'ok'
+                glyph('ok') . _('yes'),
+                'btn-primary'
             )
         ])
     ]);
@@ -102,18 +99,14 @@ function UserAngelType_confirm_view($user_angeltype, $user, $angeltype)
         msg(),
         info(sprintf(_('Do you really want to confirm %s for %s?'), User_Nick_render($user), $angeltype['name']), true),
         buttons([
-            button(
-                page_link_to('angeltypes', ['action' => 'view', 'angeltype_id' => $angeltype['id']]),
-                _('cancel'),
-                'cancel'
-            ),
+            button(angeltype_link($angeltype['id']), glyph('remove') . _('cancel')),
             button(
                 page_link_to(
                     'user_angeltypes',
                     ['action' => 'confirm', 'user_angeltype_id' => $user_angeltype['id'], 'confirmed' => 1]
                 ),
-                _('yes'),
-                'ok'
+                glyph('ok') . _('yes'),
+                'btn-primary'
             )
         ])
     ]);
@@ -131,16 +124,12 @@ function UserAngelType_delete_view($user_angeltype, $user, $angeltype)
         msg(),
         info(sprintf(_('Do you really want to delete %s from %s?'), User_Nick_render($user), $angeltype['name']), true),
         buttons([
-            button(
-                page_link_to('angeltypes', ['action' => 'view', 'angeltype_id' => $angeltype['id']]),
-                _('cancel'),
-                'cancel'
-            ),
+            button(angeltype_link($angeltype['id']), glyph('remove') . _('cancel')),
             button(
                 page_link_to('user_angeltypes',
                     ['action' => 'delete', 'user_angeltype_id' => $user_angeltype['id'], 'confirmed' => 1]),
-                _('yes'),
-                'ok'
+                glyph('ok') . _('yes'),
+                'btn-primary'
             )
         ])
     ]);
@@ -187,18 +176,14 @@ function UserAngelType_join_view($user, $angeltype)
         msg(),
         info(sprintf(_('Do you really want to add %s to %s?'), User_Nick_render($user), $angeltype['name']), true),
         buttons([
-            button(
-                page_link_to('angeltypes', ['action' => 'view', 'angeltype_id' => $angeltype['id']]),
-                _('cancel'),
-                'cancel'
-            ),
+            button(angeltype_link($angeltype['id']), glyph('remove') . _('cancel')),
             button(
                 page_link_to(
                     'user_angeltypes',
                     ['action' => 'add', 'angeltype_id' => $angeltype['id'], 'user_id' => $user['UID'], 'confirmed' => 1]
                 ),
-                _('save'),
-                'ok'
+                glyph('ok') . _('save'),
+                'btn-primary'
             )
         ])
     ]);
diff --git a/includes/view/User_view.php b/includes/view/User_view.php
index 04fb4d04..e47603fb 100644
--- a/includes/view/User_view.php
+++ b/includes/view/User_view.php
@@ -363,19 +363,9 @@ function User_view_myshift($shift, $user_source, $its_me)
             'btn-xs'
         );
     }
-    if (
-        ($shift['start'] > time() + config('last_unsubscribe') * 3600)
-        || in_array('user_shifts_admin', $privileges)
-    ) {
-        $parameters = [
-            'cancel' => $shift['id'],
-            'id'     => $user_source['UID'],
-        ];
-        if ($its_me) {
-            $parameters['id'] = '';
-        }
+    if (Shift_signout_allowed($shift, ['id' => $shift['TID']], $user_source)) {
         $myshift['actions'][] = button(
-            page_link_to('user_myshifts', $parameters),
+            ShiftEntry_delete_link($shift),
             glyph('trash') . _('sign off'),
             'btn-xs'
         );