feat(domain): complete phase 2 backend core

server/domain/errors.ts

@@ -0,0 +1,38 @@
+export type DomainErrorCode =
+  | "VALIDATION_ERROR"
+  | "UNAUTHENTICATED"
+  | "FORBIDDEN"
+  | "NOT_FOUND"
+  | "CONFLICT"
+  | "INVARIANT_VIOLATION";
+
+const statusByCode: Record<DomainErrorCode, number> = {
+  VALIDATION_ERROR: 400,
+  UNAUTHENTICATED: 401,
+  FORBIDDEN: 403,
+  NOT_FOUND: 404,
+  CONFLICT: 409,
+  INVARIANT_VIOLATION: 422,
+};
+
+export class DomainError extends Error {
+  readonly status: number;
+
+  constructor(
+    public readonly code: DomainErrorCode,
+    message: string,
+    public readonly details?: Record<string, unknown>,
+  ) {
+    super(message);
+    this.name = "DomainError";
+    this.status = statusByCode[code];
+  }
+}
+
+export function notFound(resource = "Kaynak"): DomainError {
+  return new DomainError("NOT_FOUND", `${resource} bulunamadı.`);
+}
+
+export function conflict(message: string): DomainError {
+  return new DomainError("CONFLICT", message);
+}