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import React from 'react';
import { flatten } from './utils/flatten';
import type { FieldValues, FormProps } from './types';
import { useFormContext } from './useFormContext';
const POST_REQUEST = 'post';
/**
* Form component to manage submission.
*
* @param props - to setup submission detail. {@link FormProps}
*
* @returns form component or headless render prop.
*
* @example
* ```tsx
* function App() {
* const { control, formState: { errors } } = useForm();
*
* return (
* <Form action="/api" control={control}>
* <input {...register("name")} />
* <p>{errors?.root?.server && 'Server error'}</p>
* <button>Submit</button>
* </Form>
* );
* }
* ```
*/
function Form<
TFieldValues extends FieldValues,
TTransformedValues = TFieldValues,
>(props: FormProps<TFieldValues, TTransformedValues>) {
const methods = useFormContext<TFieldValues, any, TTransformedValues>();
const [mounted, setMounted] = React.useState(false);
const {
control = methods.control,
onSubmit,
children,
action,
method = POST_REQUEST,
headers,
encType,
onError,
render,
onSuccess,
validateStatus,
...rest
} = props;
const submit = async (event?: React.BaseSyntheticEvent) => {
let hasError = false;
let type = '';
await control.handleSubmit(async (data) => {
const formData = new FormData();
let formDataJson = '';
try {
formDataJson = JSON.stringify(data);
} catch {}
const flattenFormValues = flatten(control._formValues);
for (const key in flattenFormValues) {
formData.append(key, flattenFormValues[key]);
}
if (onSubmit) {
await onSubmit({
data,
event,
method,
formData,
formDataJson,
});
}
if (action) {
try {
const shouldStringifySubmissionData = [
headers && headers['Content-Type'],
encType,
].some((value) => value && value.includes('json'));
const response = await fetch(String(action), {
method,
headers: {
...headers,
...(encType && encType !== 'multipart/form-data'
? { 'Content-Type': encType }
: {}),
},
body: shouldStringifySubmissionData ? formDataJson : formData,
});
if (
response &&
(validateStatus
? !validateStatus(response.status)
: response.status < 200 || response.status >= 300)
) {
hasError = true;
onError && onError({ response });
type = String(response.status);
} else {
onSuccess && onSuccess({ response });
}
} catch (error: unknown) {
hasError = true;
onError && onError({ error });
}
}
})(event);
if (hasError && props.control) {
props.control._subjects.state.next({
isSubmitSuccessful: false,
});
props.control.setError('root.server', {
type,
});
}
};
React.useEffect(() => {
setMounted(true);
}, []);
return render ? (
<>
{render({
submit,
})}
</>
) : (
<form
noValidate={mounted}
action={action}
method={method}
encType={encType}
onSubmit={submit}
{...rest}
>
{children}
</form>
);
}
export { Form };
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