@angular/forms/fesm2022/signals-compat.mjs

Angular - directives and services for creating forms

/**
 * @license Angular v21.0.5
 * (c) 2010-2025 Google LLC. https://angular.dev/
 * License: MIT
 */

import { FieldNode, getInjectorFromOptions, FieldNodeState, FieldNodeStructure, calculateValidationSelfStatus, BasicFieldAdapter, form, normalizeFormArgs } from './_structure-chunk.mjs';
import { linkedSignal, untracked, runInInjectionContext, computed, signal } from '@angular/core';
import { FormGroup, FormArray, AbstractControl } from '@angular/forms';
import { toSignal } from '@angular/core/rxjs-interop';
import { ReplaySubject } from 'rxjs';
import { map, takeUntil } from 'rxjs/operators';
import '@angular/core/primitives/signals';

class CompatFieldNode extends FieldNode {
  options;
  control;
  constructor(options) {
    super(options);
    this.options = options;
    this.control = this.options.control;
  }
}
function makeCreateDestroySubject() {
  let destroy$ = new ReplaySubject(1);
  return () => {
    if (destroy$) {
      destroy$.next();
      destroy$.complete();
    }
    return destroy$ = new ReplaySubject(1);
  };
}
function extractControlPropToSignal(options, makeSignal) {
  const injector = getInjectorFromOptions(options);
  const createDestroySubject = makeCreateDestroySubject();
  const signalOfControlSignal = linkedSignal({
    ...(ngDevMode ? {
      debugName: "signalOfControlSignal"
    } : {}),
    source: options.control,
    computation: control => {
      return untracked(() => {
        return runInInjectionContext(injector, () => makeSignal(control, createDestroySubject()));
      });
    }
  });
  return computed(() => signalOfControlSignal()());
}
const getControlStatusSignal = (options, getValue) => {
  return extractControlPropToSignal(options, (c, destroy$) => toSignal(c.statusChanges.pipe(map(() => getValue(c)), takeUntil(destroy$)), {
    initialValue: getValue(c)
  }));
};
const getControlEventsSignal = (options, getValue) => {
  return extractControlPropToSignal(options, (c, destroy$) => toSignal(c.events.pipe(map(() => {
    return getValue(c);
  }), takeUntil(destroy$)), {
    initialValue: getValue(c)
  }));
};

class CompatNodeState extends FieldNodeState {
  compatNode;
  touched;
  dirty;
  disabled;
  control;
  constructor(compatNode, options) {
    super(compatNode);
    this.compatNode = compatNode;
    this.control = options.control;
    this.touched = getControlEventsSignal(options, c => c.touched);
    this.dirty = getControlEventsSignal(options, c => c.dirty);
    const controlDisabled = getControlStatusSignal(options, c => c.disabled);
    this.disabled = computed(() => {
      return controlDisabled() || this.disabledReasons().length > 0;
    }, ...(ngDevMode ? [{
      debugName: "disabled"
    }] : []));
  }
  markAsDirty() {
    this.control().markAsDirty();
  }
  markAsTouched() {
    this.control().markAsTouched();
  }
  markAsPristine() {
    this.control().markAsPristine();
  }
  markAsUntouched() {
    this.control().markAsUntouched();
  }
}

function getParentFromOptions(options) {
  if (options.kind === 'root') {
    return undefined;
  }
  return options.parent;
}
function getFieldManagerFromOptions(options) {
  if (options.kind === 'root') {
    return options.fieldManager;
  }
  return options.parent.structure.root.structure.fieldManager;
}
function getControlValueSignal(options) {
  const value = extractControlPropToSignal(options, (control, destroy$) => {
    return toSignal(control.valueChanges.pipe(map(() => control.getRawValue()), takeUntil(destroy$)), {
      initialValue: control.getRawValue()
    });
  });
  value.set = value => {
    options.control().setValue(value);
  };
  value.update = fn => {
    value.set(fn(value()));
  };
  return value;
}
class CompatStructure extends FieldNodeStructure {
  value;
  keyInParent;
  root;
  pathKeys;
  children = signal([], ...(ngDevMode ? [{
    debugName: "children"
  }] : []));
  childrenMap = computed(() => undefined, ...(ngDevMode ? [{
    debugName: "childrenMap"
  }] : []));
  parent;
  fieldManager;
  constructor(node, options) {
    super(options.logic, node, () => {
      throw new Error(`Compat nodes don't have children.`);
    });
    this.value = getControlValueSignal(options);
    this.parent = getParentFromOptions(options);
    this.root = this.parent?.structure.root ?? node;
    this.fieldManager = getFieldManagerFromOptions(options);
    const identityInParent = options.kind === 'child' ? options.identityInParent : undefined;
    const initialKeyInParent = options.kind === 'child' ? options.initialKeyInParent : undefined;
    this.keyInParent = this.createKeyInParent(options, identityInParent, initialKeyInParent);
    this.pathKeys = computed(() => this.parent ? [...this.parent.structure.pathKeys(), this.keyInParent()] : [], ...(ngDevMode ? [{
      debugName: "pathKeys"
    }] : []));
  }
  getChild() {
    return undefined;
  }
}

class CompatValidationError {
  kind = 'compat';
  control;
  field;
  context;
  message;
  constructor({
    context,
    kind,
    control
  }) {
    this.context = context;
    this.kind = kind;
    this.control = control;
  }
}

function reactiveErrorsToSignalErrors(errors, control) {
  if (errors === null) {
    return [];
  }
  return Object.entries(errors).map(([kind, context]) => {
    return new CompatValidationError({
      context,
      kind,
      control
    });
  });
}
function extractNestedReactiveErrors(control) {
  const errors = [];
  if (control.errors) {
    errors.push(...reactiveErrorsToSignalErrors(control.errors, control));
  }
  if (control instanceof FormGroup || control instanceof FormArray) {
    for (const c of Object.values(control.controls)) {
      errors.push(...extractNestedReactiveErrors(c));
    }
  }
  return errors;
}

const EMPTY_ARRAY_SIGNAL = computed(() => [], ...(ngDevMode ? [{
  debugName: "EMPTY_ARRAY_SIGNAL"
}] : []));
const TRUE_SIGNAL = computed(() => true, ...(ngDevMode ? [{
  debugName: "TRUE_SIGNAL"
}] : []));
class CompatValidationState {
  syncValid;
  errors;
  pending;
  invalid;
  valid;
  constructor(options) {
    this.syncValid = getControlStatusSignal(options, c => c.status === 'VALID');
    this.errors = getControlStatusSignal(options, extractNestedReactiveErrors);
    this.pending = getControlStatusSignal(options, c => c.pending);
    this.valid = getControlStatusSignal(options, c => {
      return c.valid;
    });
    this.invalid = getControlStatusSignal(options, c => {
      return c.invalid;
    });
  }
  asyncErrors = EMPTY_ARRAY_SIGNAL;
  errorSummary = EMPTY_ARRAY_SIGNAL;
  rawSyncTreeErrors = EMPTY_ARRAY_SIGNAL;
  syncErrors = EMPTY_ARRAY_SIGNAL;
  rawAsyncErrors = EMPTY_ARRAY_SIGNAL;
  shouldSkipValidation = TRUE_SIGNAL;
  status = computed(() => {
    return calculateValidationSelfStatus(this);
  }, ...(ngDevMode ? [{
    debugName: "status"
  }] : []));
}

class CompatFieldAdapter {
  basicAdapter = new BasicFieldAdapter();
  newRoot(fieldManager, value, pathNode, adapter) {
    if (value() instanceof AbstractControl) {
      return createCompatNode({
        kind: 'root',
        fieldManager,
        value,
        pathNode,
        logic: pathNode.builder.build(),
        fieldAdapter: adapter
      });
    }
    return this.basicAdapter.newRoot(fieldManager, value, pathNode, adapter);
  }
  createNodeState(node, options) {
    if (!options.control) {
      return this.basicAdapter.createNodeState(node);
    }
    return new CompatNodeState(node, options);
  }
  createStructure(node, options) {
    if (!options.control) {
      return this.basicAdapter.createStructure(node, options);
    }
    return new CompatStructure(node, options);
  }
  createValidationState(node, options) {
    if (!options.control) {
      return this.basicAdapter.createValidationState(node);
    }
    return new CompatValidationState(options);
  }
  newChild(options) {
    const value = options.parent.value()[options.initialKeyInParent];
    if (value instanceof AbstractControl) {
      return createCompatNode(options);
    }
    return new FieldNode(options);
  }
}
function createCompatNode(options) {
  const control = options.kind === 'root' ? options.value : computed(() => {
    return options.parent.value()[options.initialKeyInParent];
  });
  return new CompatFieldNode({
    ...options,
    control
  });
}

function compatForm(...args) {
  const [model, maybeSchema, maybeOptions] = normalizeFormArgs(args);
  const options = {
    ...maybeOptions,
    adapter: new CompatFieldAdapter()
  };
  const schema = maybeSchema || (() => {});
  return form(model, schema, options);
}

const NG_STATUS_CLASSES = {
  'ng-touched': state => state.touched(),
  'ng-untouched': state => !state.touched(),
  'ng-dirty': state => state.dirty(),
  'ng-pristine': state => !state.dirty(),
  'ng-valid': state => state.valid(),
  'ng-invalid': state => state.invalid(),
  'ng-pending': state => state.pending()
};

export { CompatValidationError, NG_STATUS_CLASSES, compatForm };
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