Refactor code structure and remove redundant changes

src-old/lib/hooks/useOptimizedList.ts

@@ -0,0 +1,101 @@
+/**
+ * Optimized List Hook
+ * Provides memoized filtering, sorting, and pagination for large lists
+ */
+
+import { useMemo } from 'react';
+
+export interface UseOptimizedListOptions<T> {
+  items: T[];
+  searchTerm?: string;
+  searchFields?: (keyof T)[];
+  sortField?: keyof T;
+  sortDirection?: 'asc' | 'desc';
+  pageSize?: number;
+  currentPage?: number;
+}
+
+export interface UseOptimizedListResult<T> {
+  filteredItems: T[];
+  paginatedItems: T[];
+  totalCount: number;
+  pageCount: number;
+}
+
+export function useOptimizedList<T extends Record<string, any>>({
+  items,
+  searchTerm = '',
+  searchFields = [],
+  sortField,
+  sortDirection = 'asc',
+  pageSize,
+  currentPage = 1,
+}: UseOptimizedListOptions<T>): UseOptimizedListResult<T> {
+  // Memoized filtering
+  const filteredItems = useMemo(() => {
+    if (!searchTerm || searchFields.length === 0) {
+      return items;
+    }
+
+    const lowerSearchTerm = searchTerm.toLowerCase();
+    return items.filter(item =>
+      searchFields.some(field => {
+        const value = item[field];
+        if (value == null) return false;
+        return String(value).toLowerCase().includes(lowerSearchTerm);
+      })
+    );
+  }, [items, searchTerm, searchFields]);
+
+  // Memoized sorting
+  const sortedItems = useMemo(() => {
+    if (!sortField) {
+      return filteredItems;
+    }
+
+    return [...filteredItems].sort((a, b) => {
+      const aValue = a[sortField];
+      const bValue = b[sortField];
+
+      if (aValue == null && bValue == null) return 0;
+      if (aValue == null) return sortDirection === 'asc' ? 1 : -1;
+      if (bValue == null) return sortDirection === 'asc' ? -1 : 1;
+
+      if (typeof aValue === 'string' && typeof bValue === 'string') {
+        return sortDirection === 'asc'
+          ? aValue.localeCompare(bValue)
+          : bValue.localeCompare(aValue);
+      }
+
+      if (typeof aValue === 'number' && typeof bValue === 'number') {
+        return sortDirection === 'asc' ? aValue - bValue : bValue - aValue;
+      }
+
+      return 0;
+    });
+  }, [filteredItems, sortField, sortDirection]);
+
+  // Memoized pagination
+  const paginatedItems = useMemo(() => {
+    if (!pageSize) {
+      return sortedItems;
+    }
+
+    const startIndex = (currentPage - 1) * pageSize;
+    const endIndex = startIndex + pageSize;
+    return sortedItems.slice(startIndex, endIndex);
+  }, [sortedItems, pageSize, currentPage]);
+
+  // Calculate page count
+  const pageCount = useMemo(() => {
+    if (!pageSize) return 1;
+    return Math.ceil(sortedItems.length / pageSize);
+  }, [sortedItems.length, pageSize]);
+
+  return {
+    filteredItems: sortedItems,
+    paginatedItems,
+    totalCount: sortedItems.length,
+    pageCount,
+  };
+}