first commit

src/common/utils/helper/ApiError.ts

@@ -0,0 +1,33 @@
+class ApiError<T = unknown> extends Error {
+	statusCode: number;
+	data: T | null;
+	message: string;
+	success: boolean;
+	errors: Array<Error>;
+	isOperational: boolean;
+	stack?: string;
+
+	constructor(
+		statusCode: number,
+		message: string = 'Something went wrong',
+		errors: Array<Error> = [],
+		isOperational: boolean = true,
+		stack?: string
+	) {
+		super(message);
+		this.statusCode = statusCode;
+		this.data = null;
+		this.message = message;
+		this.success = false;
+		this.errors = errors;
+		this.isOperational = isOperational;
+
+		if (stack) {
+			this.stack = stack;
+		} else {
+			Error.captureStackTrace(this, this.constructor);
+		}
+	}
+}
+
+export default ApiError;

src/common/utils/pagination.util.ts

@@ -0,0 +1,32 @@
+import { PaginationDto, PaginationMetaDto } from '../dto/pagination.dto';
+
+export function createPaginationMeta(
+  paginationDto: PaginationDto,
+  total: number,
+): PaginationMetaDto {
+  const { page = 1, limit = 10 } = paginationDto;
+  const totalPages = Math.ceil(total / limit);
+
+  return {
+    page,
+    limit,
+    total,
+    totalPages,
+    hasNext: page < totalPages,
+    hasPrev: page > 1,
+  };
+}
+
+export function paginate<T>(
+  data: T[],
+  paginationDto: PaginationDto,
+  total: number,
+) {
+  const meta = createPaginationMeta(paginationDto, total);
+  
+  return {
+    data,
+    meta,
+  };
+}
+