From 70808c29664dcb66acf6101d533007480b2d2293 Mon Sep 17 00:00:00 2001
From: jboinembalome <jimmy.boinembalome@apside-groupe.com>
Date: Thu, 11 Feb 2021 16:00:24 +0100
Subject: [PATCH] =?UTF-8?q?Cr=C3=A9ation=20d'un=20attribut=20pour=20valide?=
 =?UTF-8?q?r=20une=20collection=20qui=20est=20pass=C3=A9e=20en=20param?=
 =?UTF-8?q?=C3=A8tre=20d'un=20endpoint?=
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L'attribut CannotBeEmpty vérifie que la liste n'est pas nulle et que la
liste contient au moins 1 élément. L'api renvoie une erreur 400
(BadRequest) dans le cas contraire.
---
 .../Attributes/CannotBeEmptyAttribute.cs      | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 EPAServeur/Attributes/CannotBeEmptyAttribute.cs

diff --git a/EPAServeur/Attributes/CannotBeEmptyAttribute.cs b/EPAServeur/Attributes/CannotBeEmptyAttribute.cs
new file mode 100644
index 0000000..b785ba1
--- /dev/null
+++ b/EPAServeur/Attributes/CannotBeEmptyAttribute.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Collections;
+using System.ComponentModel.DataAnnotations;
+
+namespace EPAServeur.Attributes
+{
+    /// <summary>
+    /// Specifies that a collection of a specified type must have at least one element.
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter, AllowMultiple = false)]
+    public sealed class CannotBeEmptyAttribute : RequiredAttribute
+    {
+        public override bool IsValid(object value)
+        {
+            var list = value as IEnumerable;
+            return list != null && list.GetEnumerator().MoveNext();
+        }
+    }
+}