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form-store.ts
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form-store.ts
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import type {
CollectionStoreFunctions,
CollectionStoreItem,
CollectionStoreOptions,
CollectionStoreState,
} from "../collection/collection-store.js";
import { createCollectionStore } from "../collection/collection-store.js";
import {
applyState,
defaultValue,
isInteger,
isObject,
} from "../utils/misc.js";
import type { Store, StoreOptions, StoreProps } from "../utils/store.js";
import {
createStore,
init,
setup,
throwOnConflictingProps,
} from "../utils/store.js";
import type {
AnyObject,
PickRequired,
SetState,
SetStateAction,
} from "../utils/types.js";
import type { DeepMap, DeepPartial, Names, StringLike } from "./types.js";
type ErrorMessage = string | undefined | null;
function nextFrame() {
return new Promise<void>((resolve) => requestAnimationFrame(() => resolve()));
}
export function hasMessages(object: FormStoreValues): boolean {
return Object.keys(object).some((key) => {
if (isObject(object[key])) {
return hasMessages(object[key]);
}
return !!object[key];
});
}
export function get<T>(
values: FormStoreValues,
path: StringLike | string[],
defaultValue?: T,
): T {
const [key, ...rest] = Array.isArray(path) ? path : `${path}`.split(".");
if (key == null || !values) {
return defaultValue as T;
}
if (!rest.length) {
return values[key] ?? defaultValue;
}
return get(values[key], rest, defaultValue);
}
function set<T extends FormStoreValues | unknown[]>(
values: T,
path: StringLike | string[],
value: unknown,
): T {
const [k, ...rest] = Array.isArray(path) ? path : `${path}`.split(".");
if (k == null) return values;
const key = k as keyof T;
const isIntegerKey = isInteger(key);
const nextValues = isIntegerKey ? values || [] : values || {};
const nestedValues = nextValues[key];
const result =
rest.length && (Array.isArray(nestedValues) || isObject(nestedValues))
? set(nestedValues, rest, value)
: value;
if (isIntegerKey) {
const index = Number(key);
if (values && Array.isArray(values)) {
return [
...values.slice(0, index),
result,
...values.slice(index + 1),
] as T;
}
const nextValues = [] as unknown as T;
nextValues[index as keyof T] = result as T[keyof T];
return nextValues;
}
return { ...values, [key]: result };
}
function setAll<T extends FormStoreValues, V>(values: T, value: V) {
const result = {} as FormStoreValues;
const keys = Object.keys(values);
for (const key of keys) {
const currentValue = values[key];
if (Array.isArray(currentValue)) {
result[key] = currentValue.map((v) => {
if (isObject(v)) {
return setAll(v, value);
}
return value;
});
} else if (isObject(currentValue)) {
result[key] = setAll(currentValue, value);
} else {
result[key] = value;
}
}
return result as DeepMap<T, V>;
}
function getNameHandler(
cache: FormStoreValues,
prevKeys: Array<string | symbol> = [],
) {
const handler: ProxyHandler<FormStoreValues> = {
get(target, key) {
if (["toString", "valueOf", Symbol.toPrimitive].includes(key)) {
return () => prevKeys.join(".");
}
const nextKeys = [...prevKeys, key];
const nextKey = nextKeys.join(".");
if (cache[nextKey]) {
return cache[nextKey];
}
const nextProxy = new Proxy(target, getNameHandler(cache, nextKeys));
cache[nextKey] = nextProxy;
return nextProxy;
},
};
return handler;
}
function getStoreCallbacks(
store?: Store & {
__unstableCallbacks?: Store<{
validate: FormStoreCallback[];
submit: FormStoreCallback[];
}>;
},
) {
return store?.__unstableCallbacks;
}
function createNames() {
const cache = Object.create(null);
return new Proxy(Object.create(null), getNameHandler(cache));
}
/**
* Creates a form store.
*/
export function createFormStore<T extends FormStoreValues = FormStoreValues>(
props: PickRequired<
FormStoreProps<T>,
| "values"
| "defaultValues"
| "errors"
| "defaultErrors"
| "touched"
| "defaultTouched"
>,
): FormStore<T>;
export function createFormStore(props: FormStoreProps): FormStore;
export function createFormStore(props: FormStoreProps = {}): FormStore {
throwOnConflictingProps(props, props.store);
const syncState = props.store?.getState();
const collection = createCollectionStore(props);
const values = defaultValue(
props.values,
syncState?.values,
props.defaultValues,
{},
);
const errors = defaultValue(
props.errors,
syncState?.errors,
props.defaultErrors,
{},
);
const touched = defaultValue(
props.touched,
syncState?.touched,
props.defaultTouched,
{},
);
const initialState: FormStoreState = {
...collection.getState(),
values,
errors,
touched,
validating: defaultValue(syncState?.validating, false),
submitting: defaultValue(syncState?.submitting, false),
submitSucceed: defaultValue(syncState?.submitSucceed, 0),
submitFailed: defaultValue(syncState?.submitFailed, 0),
valid: !hasMessages(errors),
};
const form = createStore(initialState, collection, props.store);
const syncCallbacks = getStoreCallbacks(props.store);
const syncCallbacksState = syncCallbacks?.getState();
const callbacksInitialState = {
validate: syncCallbacksState?.validate || [],
submit: syncCallbacksState?.submit || [],
};
const callbacks = createStore(callbacksInitialState, syncCallbacks);
setup(form, () => init(callbacks));
const validate = async () => {
form.setState("validating", true);
form.setState("errors", {});
const validateCallbacks = callbacks.getState().validate;
try {
// Run all the validation callbacks sequentially so they run in a
// predictable order. See https://github.com/ariakit/ariakit/issues/2282
for (const callback of validateCallbacks) {
await callback(form.getState());
}
// Wait for the next frame to allow the errors to be set on the state.
await nextFrame();
return !hasMessages(form.getState().errors);
} finally {
form.setState("validating", false);
}
};
return {
...collection,
...form,
names: createNames(),
setValues: (values) => form.setState("values", values),
getValue: (name) => get(form.getState().values, name),
setValue: (name, value) =>
form.setState("values", (values) => {
const prevValue = get(values, name);
const nextValue = applyState(value, prevValue);
if (nextValue === prevValue) return values;
return set(values, name, nextValue);
}),
pushValue: (name, value) =>
form.setState("values", (values) => {
const array = get(values, name, [] as unknown[]);
return set(values, name, [...array, value]);
}),
removeValue: (name, index) =>
form.setState("values", (values) => {
const array = get(values, name, [] as unknown[]);
return set(values, name, [
...array.slice(0, index),
null,
...array.slice(index + 1),
]);
}),
setErrors: (errors) => form.setState("errors", errors),
getError: (name) => get(form.getState().errors, name),
setError: (name, error) =>
form.setState("errors", (errors) => {
const prevError = get(errors, name);
const nextError = applyState(error, prevError);
if (nextError === prevError) return errors;
return set(errors, name, nextError);
}),
setTouched: (touched) => form.setState("touched", touched),
getFieldTouched: (name) => !!get(form.getState().touched, name),
setFieldTouched: (name, value) =>
form.setState("touched", (touched) => {
const prevValue = get(touched, name);
const nextValue = applyState(value, prevValue);
if (nextValue === prevValue) return touched;
return set(touched, name, nextValue);
}),
onValidate: (callback) => {
callbacks.setState("validate", (callbacks) => [...callbacks, callback]);
return () => {
callbacks.setState("validate", (callbacks) =>
callbacks.filter((c) => c !== callback),
);
};
},
validate,
onSubmit: (callback) => {
callbacks.setState("submit", (callbacks) => [...callbacks, callback]);
return () => {
callbacks.setState("submit", (callbacks) =>
callbacks.filter((c) => c !== callback),
);
};
},
submit: async () => {
form.setState("submitting", true);
form.setState("touched", setAll(form.getState().values, true));
try {
if (await validate()) {
const submitCallbacks = callbacks.getState().submit;
// Run all the submit callbacks sequentially so they run in a
// predictable order. See
// https://github.com/ariakit/ariakit/issues/2282
for (const callback of submitCallbacks) {
await callback(form.getState());
}
// Wait for the next frame to allow the errors to be set on the state.
await nextFrame();
if (!hasMessages(form.getState().errors)) {
form.setState("submitSucceed", (count) => count + 1);
return true;
}
}
form.setState("submitFailed", (count) => count + 1);
return false;
} catch (error) {
form.setState("submitFailed", (count) => count + 1);
throw error;
} finally {
form.setState("submitting", false);
}
},
reset: () => {
form.setState("values", values);
form.setState("errors", errors);
form.setState("touched", touched);
form.setState("validating", false);
form.setState("submitting", false);
form.setState("submitSucceed", 0);
form.setState("submitFailed", 0);
},
// @ts-expect-error Internal
__unstableCallbacks: callbacks,
};
}
export type FormStoreCallback<T extends FormStoreState = FormStoreState> = (
state: T,
) => void | Promise<void>;
export type FormStoreValues = AnyObject;
export interface FormStoreItem extends CollectionStoreItem {
type: "field" | "label" | "description" | "error" | "button";
name: string;
}
export interface FormStoreState<T extends FormStoreValues = FormStoreValues>
extends CollectionStoreState<FormStoreItem> {
/**
* Form values.
*
* Live examples:
* - [FormRadio](https://ariakit.org/examples/form-radio)
* - [FormSelect](https://ariakit.org/examples/form-select)
* @default {}
*/
values: T;
/**
* Form errors.
*/
errors: DeepPartial<DeepMap<T, ErrorMessage>>;
/**
* The touched state of the form.
*/
touched: DeepPartial<DeepMap<T, boolean>>;
/**
* Whether the form is valid.
*/
valid: boolean;
/**
* Whether the form is validating.
*/
validating: boolean;
/**
* Whether the form is submitting.
*/
submitting: boolean;
/**
* The number of times
* [`submit`](https://ariakit.org/reference/use-form-store#submit) has been
* called with a successful response.
*/
submitSucceed: number;
/**
* The number of times
* [`submit`](https://ariakit.org/reference/use-form-store#submit) has been
* called with an error response.
*/
submitFailed: number;
}
export interface FormStoreFunctions<T extends FormStoreValues = FormStoreValues>
extends CollectionStoreFunctions<FormStoreItem> {
/**
* An object containing the names of the form fields for type safety.
*
* Live examples:
* - [FormRadio](https://ariakit.org/examples/form-radio)
* - [FormSelect](https://ariakit.org/examples/form-select)
* @example
* store.names.name; // "name"
* store.names.name.first; // "name.first"
* store.names.name.last; // "name.last"
*/
names: Names<T>;
/**
* Sets the [`values`](https://ariakit.org/reference/form-provider#values)
* state.
* @example
* store.setValues({ name: "John" });
* store.setValues((values) => ({ ...values, name: "John" }));
*/
setValues: SetState<FormStoreState<T>["values"]>;
/**
* Retrieves a field value.
*
* Live examples:
* - [FormRadio](https://ariakit.org/examples/form-radio)
* @example
* const nameValue = store.getValue("name");
* // Can also use store.names for type-safety.
* const emailValue = store.getValue(store.names.email);
*/
getValue: <T = any>(name: StringLike) => T;
/**
* Sets a field value.
*
* Live examples:
* - [FormSelect](https://ariakit.org/examples/form-select)
* @example
* store.setValue("name", "John");
* store.setValue("name", (value) => value + " Doe");
* // Can also use store.names for type-safety.
* store.setValue(store.names.name, "John");
*/
setValue: <T>(name: StringLike, value: SetStateAction<T>) => void;
/**
* Pushes a value to an array field.
* @example
* store.pushValue("tags", "new tag");
* store.pushValue("tags", { id: 1, name: "new tag" });
* // Can also use store.names for type-safety.
* store.pushValue(store.names.tags, "new tag");
*/
pushValue: <T>(name: StringLike, value: T) => void;
/**
* Removes a value from an array field.
* @example
* store.removeValue("tags", 0);
* store.removeValue("tags", 1);
* // Can also use store.names for type-safety.
* store.removeValue(store.names.tags, 0);
*/
removeValue: (name: StringLike, index: number) => void;
/**
* Sets the [`errors`](https://ariakit.org/reference/form-provider#errors)
* state.
* @example
* store.setErrors({ name: "Name is required" });
* store.setErrors((errors) => ({ ...errors, name: "Name is required" }));
*/
setErrors: SetState<FormStoreState<T>["errors"]>;
/**
* Retrieves a field error.
* @example
* const nameError = store.getError("name");
* // Can also use store.names for type-safety.
* const emailError = store.getError(store.names.email);
*/
getError: (name: StringLike) => ErrorMessage;
/**
* Sets a field error.
*
* Live examples:
* - [FormRadio](https://ariakit.org/examples/form-radio)
* @example
* store.setError("name", "Name is required");
* store.setError("name", (error) => error + "!");
* // Can also use store.names for type-safety.
* store.setError(store.names.name, "Name is required");
*/
setError: (name: StringLike, error: SetStateAction<ErrorMessage>) => void;
/**
* Sets the [`touched`](https://ariakit.org/reference/form-provider#touched)
* state.
* @example
* store.setTouched({ name: true });
* store.setTouched((touched) => ({ ...touched, name: true }));
*/
setTouched: SetState<FormStoreState<T>["touched"]>;
/**
* Retrieves a field touched state.
* @example
* const nameTouched = store.getFieldTouched("name");
* // Can also use store.names for type-safety.
* const emailTouched = store.getFieldTouched(store.names.email);
*/
getFieldTouched: (name: StringLike) => boolean;
/**
* Sets a field touched state.
* @example
* store.setFieldTouched("name", true);
* store.setFieldTouched("name", (value) => !value);
* // Can also use store.names for type-safety.
* store.setFieldTouched(store.names.name, true);
*/
setFieldTouched: (name: StringLike, value: SetStateAction<boolean>) => void;
/**
* Function that accepts a callback that will be used to validate the form
* when [`validate`](https://ariakit.org/reference/use-form-store#validate) is
* called. It returns a cleanup function that will remove the callback.
* @example
* const cleanup = store.onValidate(async (state) => {
* const errors = await api.validate(state.values);
* if (errors) {
* store.setErrors(errors);
* }
* });
*/
onValidate: (callback: FormStoreCallback<FormStoreState<T>>) => void;
/**
* Function that accepts a callback that will be used to submit the form when
* [`submit`](https://ariakit.org/reference/use-form-store#submit) is called.
* It returns a cleanup function that will remove the callback.
* @param callback The callback function.
* @example
* const cleanup = store.onSubmit(async (state) => {
* try {
* await api.submit(state.values);
* } catch (errors) {
* store.setErrors(errors);
* }
* });
*/
onSubmit: (callback: FormStoreCallback<FormStoreState<T>>) => void;
/**
* Validates the form.
* @example
* if (await store.validate()) {
* // Form is valid.
* }
*/
validate: () => Promise<boolean>;
/**
* Submits the form. This also triggers validation.
* @example
* if (await form.submit()) {
* // Form is submitted.
* }
*/
submit: () => Promise<boolean>;
/**
* Resets the form to its default values.
*/
reset: () => void;
}
export interface FormStoreOptions<T extends FormStoreValues = FormStoreValues>
extends CollectionStoreOptions<FormStoreItem>,
StoreOptions<FormStoreState<T>, "values" | "errors" | "touched"> {
/**
* The default values of the form.
* @default {}
*/
defaultValues?: FormStoreState<T>["values"];
/**
* The default errors of the form.
*/
defaultErrors?: FormStoreState<T>["errors"];
/**
* The default touched state of the form.
*/
defaultTouched?: FormStoreState<T>["touched"];
}
export interface FormStoreProps<T extends FormStoreValues = FormStoreValues>
extends FormStoreOptions<T>,
StoreProps<FormStoreState<T>> {}
export interface FormStore<T extends FormStoreValues = FormStoreValues>
extends FormStoreFunctions<T>,
Store<FormStoreState<T>> {}