feat: implement save all

src/lib/error.types.ts

@@ -0,0 +1,36 @@
+export class AppError extends Error {
+  constructor(
+    message: string,
+    public code: string,
+    public details?: unknown,
+  ) {
+    super(message);
+    this.name = "AppError";
+  }
+}
+
+export class ImageError extends AppError {
+  constructor(message: string) {
+    super(message, "IMAGE_ERROR");
+  }
+}
+
+export class TextError extends AppError {
+  constructor(message: string) {
+    super(message, "TEXT_ERROR");
+  }
+}
+
+export class CanvasError extends AppError {
+  constructor(message: string) {
+    super(message, "CANVAS_ERROR");
+  }
+}
+
+export class StorageError extends AppError {
+  constructor(message: string) {
+    super(message, "STORAGE_ERROR");
+  }
+}
+
+export type ErrorType = AppError | ImageError | TextError | CanvasError | StorageError;

src/lib/utils/errorUtils.ts

@@ -0,0 +1,26 @@
+import { AppError } from "$lib/error.types";
+
+export function formatError(error: unknown, defaultMessage: string = "Произошла ошибка"): string {
+  if (error instanceof AppError || error instanceof Error) {
+    return `${defaultMessage}: ${error.message}`;
+  }
+
+  if (typeof error === "string") {
+    return `${defaultMessage}: ${error}`;
+  }
+
+  return `${defaultMessage}: Произошла неизвестная ошибка`;
+}
+
+export function createError(message: string, code: string, recoverable: boolean = true, details?: unknown): AppError {
+  return new AppError(message, code, recoverable);
+}
+
+export function logError(error: unknown, context?: string): void {
+  console.error("Error occurred:", {
+    error,
+    context,
+    timestamp: new Date().toISOString(),
+    stack: error instanceof Error ? error.stack : undefined,
+  });
+}