fix: bug in assignment vertalingen

frontend/src/components/assignments/DeadlineSelector.vue

@@ -1,6 +1,5 @@
 <script setup lang="ts">
     import { ref, watch } from "vue";
-    import { deadlineRules } from "@/utils/assignment-rules.ts";
 
     const emit = defineEmits<(e: "update:deadline", value: Date | null) => void>();
     const props = defineProps<{ deadline: Date | null }>();
@@ -19,6 +18,24 @@
             emit("update:deadline", null);
         }
     });
+
+    const deadlineRules = [
+        (value: string): string | boolean => {
+
+            const selectedDateTime = new Date(value);
+            const now = new Date();
+
+            if (isNaN(selectedDateTime.getTime())) {
+                return t("deadline-invalid");
+            }
+
+            if (selectedDateTime <= now) {
+                return t("deadline-past");
+            }
+
+            return true;
+        },
+    ];
 </script>
 
 <template>