3 files changed, 35 insertions, 1 deletions
diff --git a/includes/model/ShiftEntry_model.php b/includes/model/ShiftEntry_model.php
index 008531ff..6324c3bf 100644
--- a/includes/model/ShiftEntry_model.php
+++ b/includes/model/ShiftEntry_model.php
@@ -85,6 +85,23 @@ function ShiftEntries_upcoming_for_user($user) {
 }
 
 /**
+ * Returns shifts completed by the given user.
+ *
+ * @param User $user          
+ */
+function ShiftEntries_finished_by_user($user){
+	  return sql_select("
+      SELECT *
+      FROM `ShiftEntry`
+      JOIN `Shifts` ON (`Shifts`.`SID` = `ShiftEntry`.`SID`)
+      JOIN `ShiftTypes` ON `ShiftTypes`.`id` = `Shifts`.`shifttype_id`
+      WHERE `ShiftEntry`.`UID`=" . sql_escape($user['UID']) . "
+      AND `Shifts`.`end` < " . sql_escape(time()) . "
+      ORDER BY `Shifts`.`end`
+      ");
+}
+
+/**
  * Returns all shift entries in given shift for given angeltype.
  *
  * @param int $shift_id          
diff --git a/includes/model/User_model.php b/includes/model/User_model.php
index e1bb2733..00c3bfdd 100644
--- a/includes/model/User_model.php
+++ b/includes/model/User_model.php
@@ -260,4 +260,19 @@ function User_generate_password_recovery_token(&$user) {
   return $user['password_recovery_token'];
 }
 
+
+function User_get_eligable_voucher_count(&$user) {
+  global $voucher_settings;
+  
+	$shifts_done = count(ShiftEntries_finished_by_user($user));
+	
+	$earned_vouchers = $user['got_voucher'] - $voucher_settings['initial_vouchers'];
+	$elegible_vouchers = $shifts_done / $voucher_settings['shifts_per_voucher'] - $earned_vouchers;
+	if ( $elegible_vouchers < 0) {
+		return 0;
+	}
+	
+	return $elegible_vouchers;
+}
+
 ?>
diff --git a/includes/view/User_view.php b/includes/view/User_view.php
index 09668d6f..dbdc617b 100644
--- a/includes/view/User_view.php
+++ b/includes/view/User_view.php
@@ -45,8 +45,10 @@ function User_edit_vouchers_view($user) {
       buttons([
           button(user_link($user), glyph('chevron-left') . _("back")) 
       ]),
+      heading(sprintf(_("angel should receive at least  %d vouchers."), User_get_eligable_voucher_count($user)), 3),
+      heading(_("This is a automatically calculated MINIMUM value, you can of course give out more if appropriate!"), 4),
       form([
-          form_spinner('vouchers', _("Number of vouchers"), $user['got_voucher']),
+          form_spinner('vouchers', _("Number of vouchers given out"), $user['got_voucher']),
           form_submit('submit', _("Save")) 
       ], page_link_to('users') . '&action=edit_vouchers&user_id=' . $user['UID']) 
   ]);