ngx-forms-builder/esm2015/lib/services/model-form-builder.service.js

A small library that adds validation with decorators and build angular forms.

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
import 'reflect-metadata';
import { Injectable } from '@angular/core';
import { FormGroup, FormControl, Validators } from '@angular/forms';
/**
 * @template T
 */
export class ModelFormBuilder {
    /**
     * @param {?} target
     * @param {?=} options
     * @return {?}
     */
    build(target, options) {
        /** @type {?} */
        const fg = new FormGroup({}, options);
        for (const propertyKey of Object.keys(target)) {
            /** @type {?} */
            const decorators = Reflect.getMetadataKeys(target, propertyKey);
            if (decorators.indexOf('exclude') > 0) {
                continue;
            }
            fg.addControl(propertyKey, new FormControl(target[propertyKey]));
            /** @type {?} */
            const validators = [];
            decorators
                .filter((/**
             * @param {?} x
             * @return {?}
             */
            x => x !== 'design:type'))
                .forEach((/**
             * @param {?} decorator
             * @return {?}
             */
            (decorator) => {
                /** @type {?} */
                const validator = this.getValidatorByType(decorator, target, propertyKey);
                if (validator !== null) {
                    validators.push(validator);
                }
            }));
            fg.get(propertyKey).setValidators(validators);
        }
        return fg;
    }
    /**
     * @param {?} metadataKey
     * @param {?} target
     * @param {?} propertyKey
     * @return {?}
     */
    getValidatorByType(metadataKey, target, propertyKey) {
        /** @type {?} */
        const validatorsType = {
            required: (/**
             * @param {?} _
             * @return {?}
             */
            _ => Validators.required),
            email: (/**
             * @param {?} _
             * @return {?}
             */
            _ => Validators.email),
            min: (/**
             * @param {?} min
             * @return {?}
             */
            (min) => Validators.min(min)),
            max: (/**
             * @param {?} max
             * @return {?}
             */
            (max) => Validators.max(max)),
            pattern: (/**
             * @param {?} pattern
             * @return {?}
             */
            (pattern) => Validators.pattern(pattern)),
            customValidator: (/**
             * @param {?} custom
             * @return {?}
             */
            (custom) => custom)
        };
        /** @type {?} */
        const metadataValue = Reflect.getMetadata(metadataKey, target, propertyKey);
        return validatorsType[metadataKey](metadataValue);
    }
}
ModelFormBuilder.decorators = [
    { type: Injectable }
];
/**
 * @record
 */
function ValidatorsType() { }
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