From ea682998a8e6640376f856fb45749f9e493bf0f7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20Z=C3=ADpek?= <jan@zipek.cz>
Date: Sun, 28 Aug 2022 13:06:44 +0200
Subject: [PATCH] Preparation of confirm modal context

---
 client/src/contexts/ConfirmModalContext.tsx | 85 +++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 client/src/contexts/ConfirmModalContext.tsx

diff --git a/client/src/contexts/ConfirmModalContext.tsx b/client/src/contexts/ConfirmModalContext.tsx
new file mode 100644
index 0000000..b18dc1c
--- /dev/null
+++ b/client/src/contexts/ConfirmModalContext.tsx
@@ -0,0 +1,85 @@
+import { Modal } from '@/components/Modal'
+import { ComponentChild, createContext } from 'preact'
+import { useCallback, useContext, useMemo, useState } from 'preact/hooks'
+
+type Props = {
+	children: ComponentChild
+}
+
+type ShowModalProps = {
+	content: ComponentChild
+	onConfirm: () => void
+	onCancel: () => void
+}
+
+type ShowModelResult = {
+	show: () => void
+}
+
+type ConfirmModalContext = {
+	createModal: (props: ShowModalProps) => ShowModelResult
+}
+
+type ModalState = {
+	id: string
+	props: ShowModalProps
+}
+
+const ConfirmModalContext = createContext<ConfirmModalContext | null>(null)
+
+export const ConfirmModalContextProvider = ({ children }: Props) => {
+	const [modals, setModals] = useState([] as ModalState[])
+
+	const createModal = useCallback((props: ShowModalProps) => {
+		return {
+			show: () =>
+				setModals((p) => [
+					...p,
+					{ id: new Date().getTime().toString(), props },
+				]),
+		}
+	}, [])
+
+	const handleClose = (modal: ModalState) => {
+		setModals((p) => p.filter((m) => m.id !== modal.id))
+
+		modal.props.onCancel()
+	}
+
+	const handleConfirm = (modal: ModalState) => {
+		setModals((p) => p.filter((m) => m.id !== modal.id))
+
+		modal.props.onConfirm()
+	}
+
+	const value = useMemo(() => ({ createModal }), [createModal])
+
+	return (
+		<ConfirmModalContext.Provider value={value}>
+			{children}
+			{modals.map((m) => (
+				<Modal open key={m.id} onClose={() => handleClose(m)}>
+					{m.props.content}
+
+					<button onClick={() => handleConfirm(m)}>OK</button>
+				</Modal>
+			))}
+		</ConfirmModalContext.Provider>
+	)
+}
+
+export const useConfirmModalContext = () => {
+	const ctx = useContext(ConfirmModalContext)
+
+	if (!ctx) {
+		throw new Error('useConfirmModalContext used outside context')
+	}
+
+	return ctx
+}
+
+export const useConfirmModal = (modal: ShowModalProps) => {
+	const ctx = useConfirmModalContext()
+
+	return ctx.createModal(modal)
+}