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import * as React from 'react';
import type { ToastActionElement, ToastProps } from '@/components/ui/toast';
const TOAST_LIMIT = 1;
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: 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: 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 };
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