56 lines
1.4 KiB
TypeScript
56 lines
1.4 KiB
TypeScript
/*
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* SPDX-FileCopyrightText: syuilo and misskey-project
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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import { computed, Reactive, reactive, watch } from 'vue';
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function copy<T>(v: T): T {
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return JSON.parse(JSON.stringify(v));
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}
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function unwrapReactive<T>(v: Reactive<T>): T {
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return JSON.parse(JSON.stringify(v));
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}
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export function useForm<T extends Record<string, any>>(initialState: T, save: (newState: T) => Promise<void>) {
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const currentState = reactive<T>(copy(initialState));
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const previousState = reactive<T>(copy(initialState));
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const modifiedStates = reactive<Record<keyof T, boolean>>({} as any);
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for (const key in currentState) {
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modifiedStates[key] = false;
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}
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const modified = computed(() => Object.values(modifiedStates).some(v => v));
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const modifiedCount = computed(() => Object.values(modifiedStates).filter(v => v).length);
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watch([currentState, previousState], () => {
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for (const key in modifiedStates) {
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modifiedStates[key] = currentState[key] !== previousState[key];
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}
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}, { deep: true });
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async function _save() {
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await save(unwrapReactive(currentState));
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for (const key in currentState) {
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previousState[key] = copy(currentState[key]);
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}
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}
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function discard() {
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for (const key in currentState) {
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currentState[key] = copy(previousState[key]);
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}
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}
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return {
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state: currentState,
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savedState: previousState,
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modifiedStates,
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modified,
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modifiedCount,
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save: _save,
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discard,
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};
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}
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