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Diffstat (limited to 'packages/auditor-backoffice-ui/src/components/form/FormProvider.tsx')
-rw-r--r-- | packages/auditor-backoffice-ui/src/components/form/FormProvider.tsx | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/packages/auditor-backoffice-ui/src/components/form/FormProvider.tsx b/packages/auditor-backoffice-ui/src/components/form/FormProvider.tsx new file mode 100644 index 000000000..0d53c4d08 --- /dev/null +++ b/packages/auditor-backoffice-ui/src/components/form/FormProvider.tsx @@ -0,0 +1,109 @@ +/* + This file is part of GNU Taler + (C) 2021-2023 Taler Systems S.A. + + GNU Taler is free software; you can redistribute it and/or modify it under the + terms of the GNU General Public License as published by the Free Software + Foundation; either version 3, or (at your option) any later version. + + GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR + A PARTICULAR PURPOSE. See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with + GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/> + */ + +/** + * + * @author Sebastian Javier Marchano (sebasjm) + */ + +import { ComponentChildren, createContext, h, VNode } from "preact"; +import { useContext, useMemo } from "preact/hooks"; + +type Updater<S> = (value: (prevState: S) => S) => void; + +export interface Props<T> { + object?: Partial<T>; + errors?: FormErrors<T>; + name?: string; + valueHandler: Updater<Partial<T>> | null; + children: ComponentChildren; +} + +const noUpdater: Updater<Partial<unknown>> = () => (s: unknown) => s; + +export function FormProvider<T>({ + object = {}, + errors = {}, + name = "", + valueHandler, + children, +}: Props<T>): VNode { + const initialObject = useMemo(() => object, []); + const value = useMemo<FormType<T>>( + () => ({ + errors, + object, + initialObject, + valueHandler: valueHandler ? valueHandler : noUpdater, + name, + toStr: {}, + fromStr: {}, + }), + [errors, object, valueHandler], + ); + + return ( + <FormContext.Provider value={value}> + <form + class="field" + onSubmit={(e) => { + e.preventDefault(); + // if (valueHandler) valueHandler(object); + }} + > + {children} + </form> + </FormContext.Provider> + ); +} + +export interface FormType<T> { + object: Partial<T>; + initialObject: Partial<T>; + errors: FormErrors<T>; + toStr: FormtoStr<T>; + name: string; + fromStr: FormfromStr<T>; + valueHandler: Updater<Partial<T>>; +} + +const FormContext = createContext<FormType<unknown>>(null!); + +/** + * FIXME: + * USE MEMORY EVENTS INSTEAD OF CONTEXT + * @deprecated + */ + +export function useFormContext<T>() { + return useContext<FormType<T>>(FormContext); +} + +export type FormErrors<T> = { + [P in keyof T]?: string | FormErrors<T[P]>; +}; + +export type FormtoStr<T> = { + [P in keyof T]?: (f?: T[P]) => string; +}; + +export type FormfromStr<T> = { + [P in keyof T]?: (f: string) => T[P]; +}; + +export type FormUpdater<T> = { + [P in keyof T]?: (f: keyof T) => (v: T[P]) => void; +}; |