@decorators/server/lib/core/helpers/param-validator.js

node decorators - decorators for express library

"use strict";
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.ParamValidator = void 0;
const di_1 = require("@decorators/di");
const class_transformer_1 = require("class-transformer");
const class_validator_1 = require("class-validator");
const utils_1 = require("../utils");
const errors_1 = require("./errors");
let ParamValidator = exports.ParamValidator = class ParamValidator {
    async validate(params, args) {
        for (const [i, arg] of args.entries()) {
            const validator = params[i].paramValidator;
            const type = (0, utils_1.isClass)(validator) ? validator : params[i].argType;
            if ((0, utils_1.isFunction)(validator)) {
                await this.useFunctionValidator(params[i], arg);
            }
            if (this.hasDecorators(type)) {
                await this.useMetadataValidator(type, params[i], arg);
            }
        }
    }
    hasDecorators(type) {
        const metadataStorage = (0, class_validator_1.getMetadataStorage)();
        const metadatas = metadataStorage.getTargetValidationMetadatas(type, null, null, null);
        return metadatas.length > 0;
    }
    async useFunctionValidator(meta, arg) {
        if (await meta.paramValidator(arg)) {
            return;
        }
        throw new errors_1.BadRequestError(`Invalid param "${meta.argName}". "${typeof arg}" received`);
    }
    async useMetadataValidator(type, meta, arg) {
        const instance = (0, class_transformer_1.plainToInstance)(type, arg);
        const errors = await (0, class_validator_1.validate)(instance, { validationError: { target: false } });
        if (errors.length) {
            throw new errors_1.BadRequestError(`Invalid param "${meta.argName}".`, errors);
        }
    }
};
exports.ParamValidator = ParamValidator = __decorate([
    (0, di_1.Injectable)()
], ParamValidator);
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