import { createContext, useContext, useCallback, useMemo, useEffect, useState, } from 'react' import PropTypes from 'prop-types' import sysend from 'sysend' import getMeta from '../../utils/meta' import { buildUrlWithDetachRole } from '../utils/url-helper' import useCallbackHandlers from '../hooks/use-callback-handlers' export const DetachContext = createContext() DetachContext.Provider.propTypes = { value: PropTypes.shape({ role: PropTypes.oneOf(['detacher', 'detached', null]), setRole: PropTypes.func.isRequired, broadcastEvent: PropTypes.func.isRequired, addEventHandler: PropTypes.func.isRequired, deleteEventHandler: PropTypes.func.isRequired, }).isRequired, } const debugPdfDetach = getMeta('ol-debugPdfDetach') const SYSEND_CHANNEL = `detach-${getMeta('ol-project_id')}` export function DetachProvider({ children }) { const [lastDetachedConnectedAt, setLastDetachedConnectedAt] = useState() const [role, setRole] = useState(() => getMeta('ol-detachRole') || null) const { addHandler: addEventHandler, deleteHandler: deleteEventHandler, callHandlers: callEventHandlers, } = useCallbackHandlers() useEffect(() => { if (debugPdfDetach) { console.log('Effect', { role }) } window.history.replaceState({}, '', buildUrlWithDetachRole(role).toString()) }, [role]) useEffect(() => { sysend.on(SYSEND_CHANNEL, message => { if (debugPdfDetach) { console.log(`Receiving:`, message) } callEventHandlers(message) }) return () => sysend.off(SYSEND_CHANNEL) }, [callEventHandlers]) const broadcastEvent = useCallback( (event, data) => { if (!role) { if (debugPdfDetach) { console.log('Not Broadcasting (no role)', { role, event, data, }) } return } if (debugPdfDetach) { console.log('Broadcasting', { role, event, data, }) } const message = { role, event, } if (data) { message.data = data } sysend.broadcast(SYSEND_CHANNEL, message) }, [role] ) useEffect(() => { broadcastEvent('connected') }, [broadcastEvent]) useEffect(() => { const onBeforeUnload = () => broadcastEvent('closed') window.addEventListener('beforeunload', onBeforeUnload) return () => window.removeEventListener('beforeunload', onBeforeUnload) }, [broadcastEvent]) useEffect(() => { const updateLastDetachedConnectedAt = message => { if (message.role === 'detached' && message.event === 'connected') { setLastDetachedConnectedAt(new Date()) } } addEventHandler(updateLastDetachedConnectedAt) return () => deleteEventHandler(updateLastDetachedConnectedAt) }, [addEventHandler, deleteEventHandler]) const value = useMemo( () => ({ role, setRole, broadcastEvent, lastDetachedConnectedAt, addEventHandler, deleteEventHandler, }), [ role, setRole, broadcastEvent, lastDetachedConnectedAt, addEventHandler, deleteEventHandler, ] ) return ( {children} ) } DetachProvider.propTypes = { children: PropTypes.any, } export function useDetachContext(propTypes) { const data = useContext(DetachContext) if (!data) { throw new Error('useDetachContext is only available inside DetachProvider') } PropTypes.checkPropTypes(propTypes, data, 'data', 'DetachContext.Provider') return data }