moving filter function within a dedicated file

src/utils/filter.js

@@ -0,0 +1,42 @@
+function filter(elements, filters) {
+    const compareDate = (dateA, dateB) => {
+        const dA = new Date(dateA);
+        const dB = new Date(dateB);
+
+        if (filters.yearOrder === "asc") {
+            return dB - dA;
+        } else {
+            return dA - dB;
+        }
+    };
+
+
+    return [...elements].sort((a, b) => {
+        const sortedATasks = a.tasks.sort((taskA, taskB) =>
+            compareDate(taskA.start, taskB.start)
+        );
+        const sortedBTasks = b.tasks.sort((taskA, taskB) =>
+            compareDate(taskA.start, taskB.start)
+        );
+
+        const timeComparison = compareDate(
+            sortedATasks[0].start,
+            sortedBTasks[0].start
+        );
+
+        if (timeComparison !== 0) {
+            return timeComparison;
+        }
+
+        if (filters.alphabetical !== null) {
+            return filters.alphabetical === "asc"
+                ? a.name.localeCompare(b.name)
+                : b.name.localeCompare(a.name);
+        }
+
+        return 0;
+    });
+}
+
+
+export default filter;