@mini2/core/dist/middlewares/validation.middleware.js

Mini Express Framework - Lightweight and modular Express.js framework with TypeScript support

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = validationMiddleware;
const class_transformer_1 = require("class-transformer");
const class_validator_1 = require("class-validator");
/**
 * validationMiddleware(ValidationClass, 'body' | 'query' | 'params')
 * - Orijinal kaynakları (req.body/query/params) ÜZERİNE YAZMAZ.
 * - Doğrulanmış veriyi şu alanlara koyar: req.validatedBody / req.validatedQuery / req.validatedParams
 * - Hata varsa 400 döner.
 */
function validationMiddleware(ValidationClass, type) {
    const handler = async (req, res, next) => {
        try {
            const source = type === 'body' ? req.body :
                type === 'query' ? req.query :
                    req.params;
            // class-transformer
            const instance = (0, class_transformer_1.plainToInstance)(ValidationClass, source, {
                enableImplicitConversion: true,
                exposeDefaultValues: true,
            });
            // class-validator
            const errors = await (0, class_validator_1.validate)(instance, {
                whitelist: true,
                forbidNonWhitelisted: false,
                skipMissingProperties: false,
                validationError: { target: false, value: false },
            });
            if (errors.length > 0) {
                res.status(400).json({
                    ok: false,
                    message: 'Validation error',
                    errors: errors.map(e => ({
                        property: e.property,
                        constraints: e.constraints,
                    })),
                });
                return; // <-- explicit return
            }
            // validated* alanlarına yaz
            if (type === 'body')
                req.validatedBody = instance;
            if (type === 'query')
                req.validatedQuery = instance;
            if (type === 'params')
                req.validatedParams = instance;
            next();
            return; // <-- explicit return
        }
        catch (err) {
            res.status(400).json({
                ok: false,
                message: 'Validation middleware failed',
                error: err?.message ?? String(err),
            });
            return; // <-- explicit return
        }
    };
    return handler; // <-- handler'ı açıkça döndür
}
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