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import { useQuery, useQueryClient } from '@tanstack/react-query';
import { getFlowFromURL } from 'calypso/landing/stepper/utils/get-flow-from-url';
import { getSessionId } from 'calypso/landing/stepper/utils/use-session-id';
import type { FlowStateManifest } from './stepper-state-manifest';
const PREFIX = 'stepper-state-item';
const VERSION = 'v1';
/**
* We don't to ever refetch this query. This is no backend to sync with.
* The data only ever changes when we mutate it ourselves, in which case we invalidate the query manually.
*/
const PERSISTENCE_CONFIG = {
staleTime: Infinity,
refetchOnMount: false,
refetchOnWindowFocus: false,
refetchOnReconnect: false,
/**
* This query doesn't really depend on network, so ask useQuery to always fetch even if the network is offline.
*/
networkMode: 'always',
} as const;
/**
* Returns a setter and a getter for the flow state. This persists the state for 7 days. The persistence is based on the flow and the session ID.
*/
export function useFlowState() {
const queryClient = useQueryClient();
const flow = getFlowFromURL() || 'flow';
const session = getSessionId();
const { data: state } = useQuery< FlowStateManifest >( {
queryKey: [ PREFIX, flow, session, VERSION ],
...PERSISTENCE_CONFIG,
} );
function get< T extends keyof FlowStateManifest >( key: T ) {
return state?.[ key ];
}
function set< T extends keyof FlowStateManifest >(
key: T,
value: FlowStateManifest[ T ]
): FlowStateManifest[ T ] {
queryClient.setQueryData( [ PREFIX, flow, session, VERSION ], {
...state,
[ key ]: value,
} );
return value as FlowStateManifest[ T ];
}
return {
get,
set,
sessionId: session,
};
}
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