@ngx-formly/core
Version:
Formly is a dynamic (JSON powered) form library for Angular that bring unmatched maintainability to your application's forms.
135 lines • 23.5 kB
JavaScript
import { Validators } from '@angular/forms';
import { FORMLY_VALIDATORS, defineHiddenProp, isPromise, observe, clone, isObject, hasKey } from '../../utils';
import { updateValidity } from '../field-form/utils';
import { isObservable } from 'rxjs';
import { map } from 'rxjs/operators';
export class FieldValidationExtension {
constructor(config) {
this.config = config;
}
onPopulate(field) {
this.initFieldValidation(field, 'validators');
this.initFieldValidation(field, 'asyncValidators');
}
initFieldValidation(field, type) {
const validators = [];
if (type === 'validators' && !(field.hasOwnProperty('fieldGroup') && !hasKey(field))) {
validators.push(this.getPredefinedFieldValidation(field));
}
if (field[type]) {
for (const validatorName of Object.keys(field[type])) {
validatorName === 'validation'
? validators.push(...field[type].validation.map((v) => this.wrapNgValidatorFn(field, v)))
: validators.push(this.wrapNgValidatorFn(field, field[type][validatorName], validatorName));
}
}
defineHiddenProp(field, '_' + type, validators);
}
getPredefinedFieldValidation(field) {
let VALIDATORS = [];
FORMLY_VALIDATORS.forEach((opt) => observe(field, ['props', opt], ({ currentValue, firstChange }) => {
VALIDATORS = VALIDATORS.filter((o) => o !== opt);
if (opt === 'required' && currentValue != null && typeof currentValue !== 'boolean') {
console.warn(`Formly: Invalid prop 'required' of type '${typeof currentValue}', expected 'boolean' (Field:${field.key}).`);
}
if (currentValue != null && currentValue !== false) {
VALIDATORS.push(opt);
}
if (!firstChange && field.formControl) {
updateValidity(field.formControl);
}
}));
return (control) => {
if (VALIDATORS.length === 0) {
return null;
}
return Validators.compose(VALIDATORS.map((opt) => () => {
const value = field.props[opt];
switch (opt) {
case 'required':
return Validators.required(control);
case 'pattern':
return Validators.pattern(value)(control);
case 'minLength':
const minLengthResult = Validators.minLength(value)(control);
const minLengthKey = this.config.getValidatorMessage('minlength') || field.validation?.messages?.minlength
? 'minlength'
: 'minLength';
return minLengthResult ? { [minLengthKey]: minLengthResult.minlength } : null;
case 'maxLength':
const maxLengthResult = Validators.maxLength(value)(control);
const maxLengthKey = this.config.getValidatorMessage('maxlength') || field.validation?.messages?.maxlength
? 'maxlength'
: 'maxLength';
return maxLengthResult ? { [maxLengthKey]: maxLengthResult.maxlength } : null;
case 'min':
return Validators.min(value)(control);
case 'max':
return Validators.max(value)(control);
default:
return null;
}
}))(control);
};
}
wrapNgValidatorFn(field, validator, validatorName) {
let validatorOption;
if (typeof validator === 'string') {
validatorOption = clone(this.config.getValidator(validator));
}
if (typeof validator === 'object' && validator.name) {
validatorOption = clone(this.config.getValidator(validator.name));
if (validator.options) {
validatorOption.options = validator.options;
}
}
if (typeof validator === 'object' && validator.expression) {
const { expression, ...options } = validator;
validatorOption = {
name: validatorName,
validation: expression,
options: Object.keys(options).length > 0 ? options : null,
};
}
if (typeof validator === 'function') {
validatorOption = {
name: validatorName,
validation: validator,
};
}
return (control) => {
const errors = validatorOption.validation(control, field, validatorOption.options);
if (isPromise(errors)) {
return errors.then((v) => this.handleResult(field, validatorName ? !!v : v, validatorOption));
}
if (isObservable(errors)) {
return errors.pipe(map((v) => this.handleResult(field, validatorName ? !!v : v, validatorOption)));
}
return this.handleResult(field, validatorName ? !!errors : errors, validatorOption);
};
}
handleResult(field, errors, { name, options }) {
if (typeof errors === 'boolean') {
errors = errors ? null : { [name]: options ? options : true };
}
const ctrl = field.formControl;
ctrl?._childrenErrors?.[name]?.();
if (isObject(errors)) {
Object.keys(errors).forEach((name) => {
const errorPath = errors[name].errorPath ? errors[name].errorPath : options?.errorPath;
const childCtrl = errorPath ? field.formControl.get(errorPath) : null;
if (childCtrl) {
const { errorPath: _errorPath, ...opts } = errors[name];
childCtrl.setErrors({ ...(childCtrl.errors || {}), [name]: opts });
!ctrl._childrenErrors && defineHiddenProp(ctrl, '_childrenErrors', {});
ctrl._childrenErrors[name] = () => {
const { [name]: _toDelete, ...childErrors } = childCtrl.errors || {};
childCtrl.setErrors(Object.keys(childErrors).length === 0 ? null : childErrors);
};
}
});
}
return errors;
}
}
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{ FormlyConfig } from '../../services/formly.config';\nimport { FormlyExtension, ValidatorOption, FormlyFieldConfigCache } from '../../models';\nimport { AbstractControl, Validators, ValidatorFn } from '@angular/forms';\nimport { FORMLY_VALIDATORS, defineHiddenProp, isPromise, observe, clone, isObject, hasKey } from '../../utils';\nimport { updateValidity } from '../field-form/utils';\nimport { isObservable } from 'rxjs';\nimport { map } from 'rxjs/operators';\n\nexport class FieldValidationExtension implements FormlyExtension {\n  constructor(private config: FormlyConfig) {}\n\n  onPopulate(field: FormlyFieldConfigCache) {\n    this.initFieldValidation(field, 'validators');\n    this.initFieldValidation(field, 'asyncValidators');\n  }\n\n  private initFieldValidation(field: FormlyFieldConfigCache, type: 'validators' | 'asyncValidators') {\n    const validators: ValidatorFn[] = [];\n    if (type === 'validators' && !(field.hasOwnProperty('fieldGroup') && !hasKey(field))) {\n      validators.push(this.getPredefinedFieldValidation(field));\n    }\n\n    if (field[type]) {\n      for (const validatorName of Object.keys(field[type])) {\n        validatorName === 'validation'\n          ? validators.push(...field[type].validation.map((v: any) => this.wrapNgValidatorFn(field, v)))\n          : validators.push(this.wrapNgValidatorFn(field, field[type][validatorName], validatorName));\n      }\n    }\n\n    defineHiddenProp(field, '_' + type, validators);\n  }\n\n  private getPredefinedFieldValidation(field: FormlyFieldConfigCache): ValidatorFn {\n    let VALIDATORS: string[] = [];\n    FORMLY_VALIDATORS.forEach((opt) =>\n      observe(field, ['props', opt], ({ currentValue, firstChange }) => {\n        VALIDATORS = VALIDATORS.filter((o) => o !== opt);\n        if (opt === 'required' && currentValue != null && typeof currentValue !== 'boolean') {\n          console.warn(\n            `Formly: Invalid prop 'required' of type '${typeof currentValue}', expected 'boolean' (Field:${\n              field.key\n            }).`,\n          );\n        }\n\n        if (currentValue != null && currentValue !== false) {\n          VALIDATORS.push(opt);\n        }\n        if (!firstChange && field.formControl) {\n          updateValidity(field.formControl);\n        }\n      }),\n    );\n\n    return (control: AbstractControl) => {\n      if (VALIDATORS.length === 0) {\n        return null;\n      }\n\n      return Validators.compose(\n        VALIDATORS.map((opt) => () => {\n          const value = field.props[opt];\n          switch (opt) {\n            case 'required':\n              return Validators.required(control);\n            case 'pattern':\n              return Validators.pattern(value)(control);\n            case 'minLength':\n              const minLengthResult = Validators.minLength(value)(control);\n              const minLengthKey =\n                this.config.getValidatorMessage('minlength') || field.validation?.messages?.minlength\n                  ? 'minlength'\n                  : 'minLength';\n\n              return minLengthResult ? { [minLengthKey]: minLengthResult.minlength } : null;\n            case 'maxLength':\n              const maxLengthResult = Validators.maxLength(value)(control);\n              const maxLengthKey =\n                this.config.getValidatorMessage('maxlength') || field.validation?.messages?.maxlength\n                  ? 'maxlength'\n                  : 'maxLength';\n\n              return maxLengthResult ? { [maxLengthKey]: maxLengthResult.maxlength } : null;\n            case 'min':\n              return Validators.min(value)(control);\n            case 'max':\n              return Validators.max(value)(control);\n            default:\n              return null;\n          }\n        }),\n      )!(control);\n    };\n  }\n\n  private wrapNgValidatorFn(field: FormlyFieldConfigCache, validator: any, validatorName?: string) {\n    let validatorOption: ValidatorOption;\n    if (typeof validator === 'string') {\n      validatorOption = clone(this.config.getValidator(validator));\n    }\n\n    if (typeof validator === 'object' && validator.name) {\n      validatorOption = clone(this.config.getValidator(validator.name));\n      if (validator.options) {\n        validatorOption.options = validator.options;\n      }\n    }\n\n    if (typeof validator === 'object' && validator.expression) {\n      const { expression, ...options } = validator;\n      validatorOption = {\n        name: validatorName,\n        validation: expression,\n        options: Object.keys(options).length > 0 ? options : null,\n      };\n    }\n\n    if (typeof validator === 'function') {\n      validatorOption = {\n        name: validatorName,\n        validation: validator,\n      };\n    }\n\n    return (control: AbstractControl) => {\n      const errors: any = validatorOption.validation(control, field, validatorOption.options);\n      if (isPromise(errors)) {\n        return errors.then((v) => this.handleResult(field, validatorName ? !!v : v, validatorOption));\n      }\n\n      if (isObservable(errors)) {\n        return errors.pipe(map((v) => this.handleResult(field, validatorName ? !!v : v, validatorOption)));\n      }\n\n      return this.handleResult(field, validatorName ? !!errors : errors, validatorOption);\n    };\n  }\n\n  private handleResult(field: FormlyFieldConfigCache, errors: any, { name, options }: ValidatorOption) {\n    if (typeof errors === 'boolean') {\n      errors = errors ? null : { [name]: options ? options : true };\n    }\n\n    const ctrl = field.formControl;\n    ctrl?._childrenErrors?.[name]?.();\n\n    if (isObject(errors)) {\n      Object.keys(errors).forEach((name) => {\n        const errorPath = errors[name].errorPath ? errors[name].errorPath : options?.errorPath;\n\n        const childCtrl = errorPath ? field.formControl.get(errorPath) : null;\n        if (childCtrl) {\n          const { errorPath: _errorPath, ...opts } = errors[name];\n          childCtrl.setErrors({ ...(childCtrl.errors || {}), [name]: opts });\n\n          !ctrl._childrenErrors && defineHiddenProp(ctrl, '_childrenErrors', {});\n          ctrl._childrenErrors[name] = () => {\n            const { [name]: _toDelete, ...childErrors } = childCtrl.errors || {};\n            childCtrl.setErrors(Object.keys(childErrors).length === 0 ? null : childErrors);\n          };\n        }\n      });\n    }\n\n    return errors;\n  }\n}\n"]}