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import {useCallback} from 'react'
import {AppBskyFeedDefs, AtUri} from '@atproto/api'
import {useQuery, useMutation, useQueryClient} from '@tanstack/react-query'
import {Shadow} from '#/state/cache/types'
import {getAgent} from '#/state/session'
import {updatePostShadow} from '#/state/cache/post-shadow'
import {track} from '#/lib/analytics/analytics'
import {useToggleMutationQueue} from '#/lib/hooks/useToggleMutationQueue'
export const RQKEY = (postUri: string) => ['post', postUri]
export function usePostQuery(uri: string | undefined) {
return useQuery<AppBskyFeedDefs.PostView>({
queryKey: RQKEY(uri || ''),
async queryFn() {
const res = await getAgent().getPosts({uris: [uri!]})
if (res.success && res.data.posts[0]) {
return res.data.posts[0]
}
throw new Error('No data')
},
enabled: !!uri,
})
}
export function useGetPost() {
const queryClient = useQueryClient()
return useCallback(
async ({uri}: {uri: string}) => {
return queryClient.fetchQuery({
queryKey: RQKEY(uri || ''),
async queryFn() {
const urip = new AtUri(uri)
if (!urip.host.startsWith('did:')) {
const res = await getAgent().resolveHandle({
handle: urip.host,
})
urip.host = res.data.did
}
const res = await getAgent().getPosts({
uris: [urip.toString()!],
})
if (res.success && res.data.posts[0]) {
return res.data.posts[0]
}
throw new Error('useGetPost: post not found')
},
})
},
[queryClient],
)
}
export function usePostLikeMutationQueue(
post: Shadow<AppBskyFeedDefs.PostView>,
) {
const postUri = post.uri
const postCid = post.cid
const initialLikeUri = post.viewer?.like
const likeMutation = usePostLikeMutation()
const unlikeMutation = usePostUnlikeMutation()
const queueToggle = useToggleMutationQueue({
initialState: initialLikeUri,
runMutation: async (prevLikeUri, shouldLike) => {
if (shouldLike) {
const {uri: likeUri} = await likeMutation.mutateAsync({
uri: postUri,
cid: postCid,
})
return likeUri
} else {
if (prevLikeUri) {
await unlikeMutation.mutateAsync({
postUri: postUri,
likeUri: prevLikeUri,
})
}
return undefined
}
},
onSuccess(finalLikeUri) {
// finalize
updatePostShadow(postUri, {
likeUri: finalLikeUri,
})
},
})
const queueLike = useCallback(() => {
// optimistically update
updatePostShadow(postUri, {
likeUri: 'pending',
})
return queueToggle(true)
}, [postUri, queueToggle])
const queueUnlike = useCallback(() => {
// optimistically update
updatePostShadow(postUri, {
likeUri: undefined,
})
return queueToggle(false)
}, [postUri, queueToggle])
return [queueLike, queueUnlike]
}
function usePostLikeMutation() {
return useMutation<
{uri: string}, // responds with the uri of the like
Error,
{uri: string; cid: string} // the post's uri and cid
>({
mutationFn: post => getAgent().like(post.uri, post.cid),
onSuccess() {
track('Post:Like')
},
})
}
function usePostUnlikeMutation() {
return useMutation<void, Error, {postUri: string; likeUri: string}>({
mutationFn: ({likeUri}) => getAgent().deleteLike(likeUri),
onSuccess() {
track('Post:Unlike')
},
})
}
export function usePostRepostMutationQueue(
post: Shadow<AppBskyFeedDefs.PostView>,
) {
const postUri = post.uri
const postCid = post.cid
const initialRepostUri = post.viewer?.repost
const repostMutation = usePostRepostMutation()
const unrepostMutation = usePostUnrepostMutation()
const queueToggle = useToggleMutationQueue({
initialState: initialRepostUri,
runMutation: async (prevRepostUri, shouldRepost) => {
if (shouldRepost) {
const {uri: repostUri} = await repostMutation.mutateAsync({
uri: postUri,
cid: postCid,
})
return repostUri
} else {
if (prevRepostUri) {
await unrepostMutation.mutateAsync({
postUri: postUri,
repostUri: prevRepostUri,
})
}
return undefined
}
},
onSuccess(finalRepostUri) {
// finalize
updatePostShadow(postUri, {
repostUri: finalRepostUri,
})
},
})
const queueRepost = useCallback(() => {
// optimistically update
updatePostShadow(postUri, {
repostUri: 'pending',
})
return queueToggle(true)
}, [postUri, queueToggle])
const queueUnrepost = useCallback(() => {
// optimistically update
updatePostShadow(postUri, {
repostUri: undefined,
})
return queueToggle(false)
}, [postUri, queueToggle])
return [queueRepost, queueUnrepost]
}
function usePostRepostMutation() {
return useMutation<
{uri: string}, // responds with the uri of the repost
Error,
{uri: string; cid: string} // the post's uri and cid
>({
mutationFn: post => getAgent().repost(post.uri, post.cid),
onSuccess() {
track('Post:Repost')
},
})
}
function usePostUnrepostMutation() {
return useMutation<void, Error, {postUri: string; repostUri: string}>({
mutationFn: ({repostUri}) => getAgent().deleteRepost(repostUri),
onSuccess() {
track('Post:Unrepost')
},
})
}
export function usePostDeleteMutation() {
return useMutation<void, Error, {uri: string}>({
mutationFn: async ({uri}) => {
await getAgent().deletePost(uri)
},
onSuccess(data, variables) {
updatePostShadow(variables.uri, {isDeleted: true})
track('Post:Delete')
},
})
}
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