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import {createContext, useCallback, useContext, useState} from 'react'
import {type AppBskyFeedDefs} from '@atproto/api'
import {type FeedDescriptor} from './queries/post-feed'
/**
* For passing the source of the post (i.e. the original post, from the feed) to the threadview,
* without using query params. Deliberately unstable to avoid using query params, use for FeedFeedback
* and other ephemeral non-critical systems.
*/
type Source = {
post: AppBskyFeedDefs.FeedViewPost
feed?: FeedDescriptor
}
const SetUnstablePostSourceContext = createContext<
(key: string, source: Source) => void
>(() => {})
const ConsumeUnstablePostSourceContext = createContext<
(uri: string) => Source | undefined
>(() => undefined)
export function Provider({children}: {children: React.ReactNode}) {
const [sources, setSources] = useState<Map<string, Source>>(() => new Map())
const setUnstablePostSource = useCallback((key: string, source: Source) => {
setSources(prev => {
const newMap = new Map(prev)
newMap.set(key, source)
return newMap
})
}, [])
const consumeUnstablePostSource = useCallback(
(uri: string) => {
const source = sources.get(uri)
if (source) {
setSources(prev => {
const newMap = new Map(prev)
newMap.delete(uri)
return newMap
})
}
return source
},
[sources],
)
return (
<SetUnstablePostSourceContext.Provider value={setUnstablePostSource}>
<ConsumeUnstablePostSourceContext.Provider
value={consumeUnstablePostSource}>
{children}
</ConsumeUnstablePostSourceContext.Provider>
</SetUnstablePostSourceContext.Provider>
)
}
export function useSetUnstablePostSource() {
return useContext(SetUnstablePostSourceContext)
}
/**
* DANGER - This hook is unstable and should only be used for FeedFeedback
* and other ephemeral non-critical systems. Does not change when the URI changes.
*/
export function useUnstablePostSource(uri: string) {
const consume = useContext(ConsumeUnstablePostSourceContext)
const [source] = useState(() => consume(uri))
return source
}
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