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Diffstat (limited to 'packages/merchant-backoffice-ui/src/components/form/FormProvider.tsx')
-rw-r--r-- | packages/merchant-backoffice-ui/src/components/form/FormProvider.tsx | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/packages/merchant-backoffice-ui/src/components/form/FormProvider.tsx b/packages/merchant-backoffice-ui/src/components/form/FormProvider.tsx new file mode 100644 index 000000000..aef410ce7 --- /dev/null +++ b/packages/merchant-backoffice-ui/src/components/form/FormProvider.tsx @@ -0,0 +1,81 @@ +/* + This file is part of GNU Taler + (C) 2021 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!) + +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 +} |