feat(web): reusable Modal + ConfirmProvider, replace native confirm()

Modal component: portal, ESC to close, Tab focus-trap, focus-on-open (prefers [data-modal-autofocus]), focus restore, overlay click, scroll lock. ConfirmProvider exposes useConfirm(): async confirm({...}) as a drop-in for window.confirm; Enter confirms, ESC cancels. Task/account deletes now use it. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01MMHQTtnQtQqL8muAXHr9kd
2026-07-02 09:36:08 +07:00
parent fcbe438f32
commit 29ccbc22e9
6 changed files with 254 additions and 3 deletions
@@ -0,0 +1,73 @@
+import { createContext, useCallback, useContext, useRef, useState, type ReactNode } from 'react'
+import { Modal } from './Modal'
+
+export type ConfirmOptions = {
+  title?: string
+  message: string
+  confirmLabel?: string
+  cancelLabel?: string
+  danger?: boolean
+}
+
+type ConfirmFn = (opts: ConfirmOptions) => Promise<boolean>
+
+const ConfirmContext = createContext<ConfirmFn | null>(null)
+
+// Drop-in async replacement for window.confirm(): `await confirm({ message })`.
+export function useConfirm(): ConfirmFn {
+  const ctx = useContext(ConfirmContext)
+  if (!ctx) throw new Error('useConfirm must be used within <ConfirmProvider>')
+  return ctx
+}
+
+export function ConfirmProvider({ children }: { children: ReactNode }) {
+  const [opts, setOpts] = useState<ConfirmOptions | null>(null)
+  const resolver = useRef<(v: boolean) => void>(() => {})
+
+  const confirm = useCallback<ConfirmFn>((o) => {
+    setOpts(o)
+    return new Promise<boolean>((resolve) => {
+      resolver.current = resolve
+    })
+  }, [])
+
+  const finish = useCallback((result: boolean) => {
+    resolver.current(result)
+    resolver.current = () => {}
+    setOpts(null)
+  }, [])
+
+  return (
+    <ConfirmContext.Provider value={confirm}>
+      {children}
+      <Modal open={opts !== null} title={opts?.title ?? 'Confirm'} onClose={() => finish(false)}>
+        {opts && (
+          <div
+            className="confirm-body"
+            onKeyDown={(e) => {
+              if (e.key === 'Enter') {
+                e.preventDefault()
+                finish(true)
+              }
+            }}
+          >
+            <p className="confirm-message">{opts.message}</p>
+            <div className="modal-actions">
+              <button type="button" className="btn" onClick={() => finish(false)}>
+                {opts.cancelLabel ?? 'Cancel'}
+              </button>
+              <button
+                type="button"
+                className={opts.danger ? 'btn btn-danger' : 'btn btn-primary'}
+                data-modal-autofocus
+                onClick={() => finish(true)}
+              >
+                {opts.confirmLabel ?? 'Confirm'}
+              </button>
+            </div>
+          </div>
+        )}
+      </Modal>
+    </ConfirmContext.Provider>
+  )
+}
@@ -0,0 +1,88 @@
+import { useEffect, useRef, type ReactNode } from 'react'
+import { createPortal } from 'react-dom'
+
+type ModalProps = {
+  open: boolean
+  title?: string
+  onClose: () => void
+  children: ReactNode
+}
+
+function focusable(root: HTMLElement | null): HTMLElement[] {
+  if (!root) return []
+  const sel = 'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])'
+  return Array.from(root.querySelectorAll<HTMLElement>(sel)).filter(
+    (el) => !el.hasAttribute('disabled') && el.getAttribute('aria-hidden') !== 'true',
+  )
+}
+
+// Reusable modal shell: portal to <body>, ESC to close, Tab focus-trap,
+// focus-on-open (prefers [data-modal-autofocus]), focus restore on close,
+// click-on-overlay to close, and body scroll lock while open.
+export function Modal({ open, title, onClose, children }: ModalProps) {
+  const dialogRef = useRef<HTMLDivElement>(null)
+  const prevFocus = useRef<HTMLElement | null>(null)
+  const onCloseRef = useRef(onClose)
+  onCloseRef.current = onClose
+
+  useEffect(() => {
+    if (!open) return
+    prevFocus.current = document.activeElement as HTMLElement | null
+
+    const auto = dialogRef.current?.querySelector<HTMLElement>('[data-modal-autofocus]')
+    ;(auto ?? focusable(dialogRef.current)[0] ?? dialogRef.current)?.focus()
+
+    function onKeyDown(e: KeyboardEvent) {
+      if (e.key === 'Escape') {
+        e.preventDefault()
+        onCloseRef.current()
+        return
+      }
+      if (e.key !== 'Tab') return
+      const items = focusable(dialogRef.current)
+      if (items.length === 0) {
+        e.preventDefault()
+        return
+      }
+      const first = items[0]
+      const last = items[items.length - 1]
+      const active = document.activeElement as HTMLElement | null
+      const inside = dialogRef.current?.contains(active)
+      if (e.shiftKey) {
+        if (active === first || !inside) {
+          e.preventDefault()
+          last.focus()
+        }
+      } else if (active === last || !inside) {
+        e.preventDefault()
+        first.focus()
+      }
+    }
+
+    document.addEventListener('keydown', onKeyDown, true)
+    const prevOverflow = document.body.style.overflow
+    document.body.style.overflow = 'hidden'
+    return () => {
+      document.removeEventListener('keydown', onKeyDown, true)
+      document.body.style.overflow = prevOverflow
+      prevFocus.current?.focus?.()
+    }
+  }, [open])
+
+  if (!open) return null
+
+  return createPortal(
+    <div
+      className="modal-overlay"
+      onMouseDown={(e) => {
+        if (e.target === e.currentTarget) onClose()
+      }}
+    >
+      <div className="modal-dialog" role="dialog" aria-modal="true" aria-label={title} ref={dialogRef} tabIndex={-1}>
+        {title && <div className="modal-title">{title}</div>}
+        {children}
+      </div>
+    </div>,
+    document.body,
+  )
+}