Initial commit

components/ui/use-toast.ts

@@ -0,0 +1,102 @@
+"use client"
+
+import * as React from "react"
+import { type ToastActionElement, type ToastProps } from "@/components/ui/toast"
+
+const TOAST_LIMIT = 5
+const TOAST_REMOVE_DELAY = 1000000
+
+type ToasterToast = ToastProps & {
+  id: string
+  title?: React.ReactNode
+  description?: React.ReactNode
+  action?: ToastActionElement
+}
+
+const actionTypes = {
+  ADD_TOAST: "ADD_TOAST",
+  UPDATE_TOAST: "UPDATE_TOAST",
+  DISMISS_TOAST: "DISMISS_TOAST",
+  REMOVE_TOAST: "REMOVE_TOAST",
+} as const
+
+let count = 0
+function genId() {
+  count = (count + 1) % Number.MAX_SAFE_INTEGER
+  return count.toString()
+}
+
+type ActionType = typeof actionTypes
+type Action =
+  | { type: ActionType["ADD_TOAST"]; toast: ToasterToast }
+  | { type: ActionType["UPDATE_TOAST"]; toast: Partial<ToasterToast> }
+  | { type: ActionType["DISMISS_TOAST"]; toastId?: ToasterToast["id"] }
+  | { type: ActionType["REMOVE_TOAST"]; toastId?: ToasterToast["id"] }
+
+interface State {
+  toasts: ToasterToast[]
+}
+
+const toastTimeouts = new Map<string, ReturnType<typeof setTimeout>>()
+
+const addToRemoveQueue = (toastId: string) => {
+  if (toastTimeouts.has(toastId)) return
+  const timeout = setTimeout(() => {
+    toastTimeouts.delete(toastId)
+    dispatch({ type: "REMOVE_TOAST", toastId })
+  }, TOAST_REMOVE_DELAY)
+  toastTimeouts.set(toastId, timeout)
+}
+
+export const reducer = (state: State, action: Action): State => {
+  switch (action.type) {
+    case "ADD_TOAST":
+      return { ...state, toasts: [action.toast, ...state.toasts].slice(0, TOAST_LIMIT) }
+    case "UPDATE_TOAST":
+      return { ...state, toasts: state.toasts.map((t) => (t.id === action.toast.id ? { ...t, ...action.toast } : t)) }
+    case "DISMISS_TOAST": {
+      const { toastId } = action
+      if (toastId) {
+        addToRemoveQueue(toastId)
+      } else {
+        state.toasts.forEach((toast) => addToRemoveQueue(toast.id))
+      }
+      return { ...state, toasts: state.toasts.map((t) => (t.id === toastId || toastId === undefined ? { ...t, open: false } : t)) }
+    }
+    case "REMOVE_TOAST":
+      if (action.toastId === undefined) return { ...state, toasts: [] }
+      return { ...state, toasts: state.toasts.filter((t) => t.id !== action.toastId) }
+  }
+}
+
+const listeners: Array<(state: State) => void> = []
+let memoryState: State = { toasts: [] }
+
+function dispatch(action: Action) {
+  memoryState = reducer(memoryState, action)
+  listeners.forEach((listener) => listener(memoryState))
+}
+
+type Toast = Omit<ToasterToast, "id">
+
+function toast({ ...props }: Toast) {
+  const id = genId()
+  const update = (props: ToasterToast) => dispatch({ type: "UPDATE_TOAST", toast: { ...props, id } })
+  const dismiss = () => dispatch({ type: "DISMISS_TOAST", toastId: id })
+  dispatch({ type: "ADD_TOAST", toast: { ...props, id, open: true, onOpenChange: (open) => { if (!open) dismiss() } } })
+  return { id, dismiss, update }
+}
+
+function useToast() {
+  const [state, setState] = React.useState<State>(memoryState)
+  React.useEffect(() => {
+    listeners.push(setState)
+    return () => {
+      const index = listeners.indexOf(setState)
+      if (index > -1) listeners.splice(index, 1)
+    }
+  }, [state])
+  return { ...state, toast, dismiss: (toastId?: string) => dispatch({ type: "DISMISS_TOAST", toastId }) }
+}
+
+export { useToast, toast }