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useCallback,
useEffect,
useMemo,
useRef,
useState,
} from 'react';
import { createContext, useContextSelector } from 'use-context-selector';
import {
type TimeOffV2Actions,
type TimeOffV2ContextValue,
type TimeOffV2Form,
type TimeOffV2State,
} from './types';
const INITIAL_FORM: TimeOffV2Form = {
approvers: [],
observers: [],
};
const toggleIdInList = (items: string[], id: string) => {
return items.includes(id)
? items.filter(item => item !== id)
: [...items, id];
};
const TimeOffV2Context = createContext<TimeOffV2ContextValue | null>(null);
const useTimeOffV2Selector = <T,>(
selector: (context: TimeOffV2ContextValue) => T,
): T => {
return useContextSelector(TimeOffV2Context, context => {
if (!context) {
throw new Error(
'TimeOffV2 context hooks must be used within TimeOffV2ContextProvider',
);
}
return selector(context);
});
};
export const useTimeOffV2StateSelector = <T,>(
selector: (state: TimeOffV2State) => T,
): T => {
return useTimeOffV2Selector(context => selector(context.state));
};
export const useTimeOffV2ActionsSelector = <T,>(
selector: (actions: TimeOffV2Actions) => T,
): T => {
return useTimeOffV2Selector(context => selector(context.actions));
};
export const TimeOffV2ContextProvider = ({
children,
}: {
children: React.ReactNode;
}) => {
const [form, setForm] = useState<TimeOffV2Form>(INITIAL_FORM);
const [isSearchOpen, setIsSearchOpen] = useState(false);
const [isDatePickerOpen, setIsDatePickerOpen] = useState(false);
const [isReasonInputOpen, setIsReasonInputOpen] = useState(false);
const [isSubmitting, setIsSubmitting] = useState(false);
const [isOnBehalf, setIsOnBehalf] = useState<boolean>(false);
const isOnBehalfActive = isOnBehalf || Boolean(form.requester);
const closeReasonInputRef = useRef<(() => void) | null>(null);
const resetApproversAndObservers = useCallback(() => {
setForm(prev => ({
...prev,
approvers: [],
observers: [],
}));
}, []);
const toggleSearch = useCallback(() => {
setIsSearchOpen(prev => !prev);
}, []);
const closeSearch = useCallback(
(options?: { keepOnBehalf?: boolean }) => {
setIsSearchOpen(false);
Eif (!form.requester && !options?.keepOnBehalf) {
setIsOnBehalf(false);
}
},
[form.requester],
);
const closeDatePicker = useCallback(() => {
setIsDatePickerOpen(false);
}, []);
const closeReasonInput = useCallback(() => {
setIsReasonInputOpen(false);
}, []);
const toggleApprover = useCallback((id: string) => {
setForm(prev => ({
...prev,
approvers: toggleIdInList(prev.approvers, id),
}));
}, []);
const toggleObserver = useCallback((id: string) => {
setForm(prev => ({
...prev,
observers: toggleIdInList(prev.observers, id),
}));
}, []);
const toggleExtraUser = useCallback((id: string) => {
setForm(prev => {
if (!id) {
const next = { ...prev };
delete next.requester;
return next;
}
return {
...prev,
requester: id,
};
});
setIsOnBehalf(Boolean(id));
}, []);
const changeDate = useCallback((start: Date, end: Date) => {
setForm(prev => ({
...prev,
start,
end,
}));
}, []);
const changeReason = useCallback((reason: string) => {
setForm(prev => ({
...prev,
note: reason,
}));
}, []);
const registerCloseReasonInput = useCallback((close: () => void) => {
closeReasonInputRef.current = close;
}, []);
const handleOpenOnBehalf = useCallback(() => {
setIsOnBehalf(true);
}, []);
// Invariant: requester selected => on-behalf mode must stay enabled.
useEffect(() => {
Iif (form.requester && !isOnBehalf) {
setIsOnBehalf(true);
}
}, [form.requester, isOnBehalf]);
const state = useMemo<TimeOffV2State>(
() => ({
form,
isSearchOpen,
isDatePickerOpen,
isReasonInputOpen,
isSubmitting,
isOnBehalf: isOnBehalfActive,
}),
[
form,
isSearchOpen,
isDatePickerOpen,
isReasonInputOpen,
isSubmitting,
isOnBehalfActive,
],
);
const actions = useMemo<TimeOffV2Actions>(
() => ({
resetApproversAndObservers,
toggleApprover,
toggleObserver,
toggleExtraUser,
changeDate,
changeReason,
toggleSearch,
closeSearch,
closeDatePicker,
closeReasonInput,
setDatePickerOpen: setIsDatePickerOpen,
setReasonInputOpen: setIsReasonInputOpen,
registerCloseReasonInput,
setSubmitting: setIsSubmitting,
handleOpenOnBehalf,
setIsOnBehalf,
}),
[
resetApproversAndObservers,
toggleApprover,
toggleObserver,
toggleExtraUser,
changeDate,
changeReason,
toggleSearch,
closeSearch,
closeDatePicker,
closeReasonInput,
registerCloseReasonInput,
handleOpenOnBehalf,
],
);
const value = useMemo<TimeOffV2ContextValue>(
() => ({
state,
actions,
}),
[state, actions],
);
return (
<TimeOffV2Context.Provider value={value}>
{children}
</TimeOffV2Context.Provider>
);
};
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