import { HttpException } from '@nestjs/common';
import { ExceptionFilterMetadata } from '@nestjs/common/interfaces/exceptions/exception-filter-metadata.interface';
import { ArgumentsHost } from '@nestjs/common/interfaces/features/arguments-host.interface';
import { isEmpty } from '@nestjs/common/utils/shared.utils';
import { InvalidExceptionFilterException } from '../errors/exceptions/invalid-exception-filter.exception';
import { BaseExceptionFilter } from './base-exception-filter';
export class ExceptionsHandler extends BaseExceptionFilter {
private filters: ExceptionFilterMetadata[] = [];
public next(exception: Error | HttpException | any, ctx: ArgumentsHost) {
Iif (this.invokeCustomFilters(exception, ctx)) {
return;
}
super.catch(exception, ctx);
}
public setCustomFilters(filters: ExceptionFilterMetadata[]) {
if (!Array.isArray(filters)) {
throw new InvalidExceptionFilterException();
}
this.filters = filters;
}
public invokeCustomFilters(exception, response): boolean {
if (isEmpty(this.filters)) return false;
const filter = this.filters.find(({ exceptionMetatypes }) => {
const hasMetatype =
!exceptionMetatypes.length ||
exceptionMetatypes.some(
ExceptionMetatype => exception instanceof ExceptionMetatype,
);
return hasMetatype;
});
filter && filter.func(exception, response);
return !!filter;
}
}
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