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* Centralized error handling for API routes
* Provides consistent error responses with proper HTTP status codes
*/
import { NextResponse } from "next/server";
import { ZodError } from "zod";
import { logger } from "@/lib/logging";
import {
AppError,
AuthenticationError,
AuthorizationError,
NotFoundError,
ValidationError,
ConflictError,
RateLimitError,
isAppError } from "@/lib/errors";
// Re-export error classes for convenience
export {
AppError,
AuthenticationError,
AuthorizationError,
NotFoundError,
ValidationError,
ConflictError,
RateLimitError } from "@/lib/errors";
/**
* Error response format
*/
interface ErrorResponse {
error: string;
code: string;
details?: Record<string, unknown>;
}
/**
* Handle errors and return appropriate NextResponse
* @param error The error that occurred
* @returns NextResponse with appropriate status code and error message
*/
export function handleError(error: unknown): NextResponse {
logger.error("API Error", error instanceof Error ? error : new Error(String(error)), { category: 'API' });
// Handle custom AppError and all its subclasses
if (isAppError(error)) {
const response: ErrorResponse = {
error: error.message,
code: error.code};
// Add retry-after header for rate limit errors
if (error instanceof RateLimitError && error.retryAfter) {
return NextResponse.json(response, {
status: error.statusCode,
headers: { "Retry-After": error.retryAfter.toString() }});
}
return NextResponse.json(response, { status: error.statusCode });
}
// Handle Zod validation errors
if (error instanceof ZodError) {
const errors: Record<string, string[]> = {};
error.issues.forEach((issue) => {
const path = issue.path.join(".");
if (!errors[path]) {
errors[path] = [];
}
errors[path].push(issue.message);
});
const response: ErrorResponse = {
error: "Validation failed",
code: "VALIDATION_ERROR",
details: errors};
return NextResponse.json(response, { status: 400 });
}
// Handle JSON parsing errors
if (error instanceof SyntaxError) {
const response: ErrorResponse = {
error: "Invalid request body",
code: "INVALID_JSON"};
return NextResponse.json(response, { status: 400 });
}
// Handle Prisma errors
if (error instanceof Error) {
const message = error.message || "Unknown error";
// Prisma unique constraint violation
if (message.includes("Unique constraint failed")) {
const response: ErrorResponse = {
error: "Record already exists",
code: "UNIQUE_CONSTRAINT_FAILED"};
return NextResponse.json(response, { status: 409 });
}
// Prisma record not found
if (message.includes("not found") || message.includes("not exist")) {
const response: ErrorResponse = {
error: "Record not found",
code: "NOT_FOUND"};
return NextResponse.json(response, { status: 404 });
}
// Prisma foreign key constraint
if (message.includes("Foreign key constraint failed")) {
const response: ErrorResponse = {
error: "Related record not found",
code: "FOREIGN_KEY_CONSTRAINT_FAILED"};
return NextResponse.json(response, { status: 400 });
}
}
// Generic internal server error
const response: ErrorResponse = {
error: "Internal server error",
code: "INTERNAL_ERROR"};
return NextResponse.json(response, { status: 500 });
}
/**
* Create a standardized error response
* @param message Error message
* @param statusCode HTTP status code
* @param code Error code for frontend handling
* @returns AppError instance
*/
export function createError(
message: string,
statusCode: number = 500,
code: string = "INTERNAL_ERROR"
): AppError {
return new AppError(message, statusCode, code);
}
/**
* Common error creators for easy use
*/
export const errors = {
unauthorized: (message = "Unauthorized") =>
new AuthenticationError(message),
forbidden: (message = "Forbidden") =>
new AuthorizationError(message),
notFound: (resource = "Resource") =>
new NotFoundError(resource),
conflict: (message = "Conflict") =>
new ConflictError(message),
validation: (message = "Validation failed", field?: string) =>
new ValidationError(message, field),
rateLimit: (message = "Too many requests", retryAfter?: number) =>
new RateLimitError(message, retryAfter),
internal: (message = "Internal server error") =>
createError(message, 500, "INTERNAL_ERROR")};
/**
* API handler wrapper that catches errors and returns proper responses
* @param handler The API handler function
* @returns Wrapped handler with error handling
*/
export function withErrorHandling<T>(
handler: (request: Request, context?: T) => Promise<NextResponse>
): (request: Request, context?: T) => Promise<NextResponse> {
return async (request: Request, context?: T) => {
try {
return await handler(request, context);
} catch (error) {
return handleError(error);
}
};
}
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