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import React from 'react'
import {AppBskyActorDefs, BskyAgent} from '@atproto/api'
import {useQuery, useQueryClient} from '@tanstack/react-query'
import AwaitLock from 'await-lock'
import Fuse from 'fuse.js'
import {logger} from '#/logger'
import {useSession} from '#/state/session'
import {useMyFollowsQuery} from '#/state/queries/my-follows'
export const RQKEY = (prefix: string) => ['actor-autocomplete', prefix]
export function useActorAutocompleteQuery(prefix: string) {
const {agent} = useSession()
const {data: follows, isFetching} = useMyFollowsQuery()
return useQuery<AppBskyActorDefs.ProfileViewBasic[]>({
queryKey: RQKEY(prefix || ''),
async queryFn() {
const res = await agent.searchActorsTypeahead({
term: prefix,
limit: 8,
})
return computeSuggestions(prefix, follows, res.data.actors)
},
enabled: !isFetching && !!prefix,
})
}
export function useActorSearch() {
const queryClient = useQueryClient()
const {agent} = useSession()
const {data: follows} = useMyFollowsQuery()
const followsSearch = React.useMemo(() => {
if (!follows) return undefined
return new Fuse(follows, {
includeScore: true,
keys: ['displayName', 'handle'],
})
}, [follows])
return React.useCallback(
async ({query}: {query: string}) => {
let searchResults: AppBskyActorDefs.ProfileViewBasic[] = []
if (followsSearch) {
const results = followsSearch.search(query)
searchResults = results.map(({item}) => item)
}
try {
const res = await queryClient.fetchQuery({
// cached for 1 min
staleTime: 60 * 1000,
queryKey: ['search', query],
queryFn: () =>
agent.searchActorsTypeahead({
term: query,
limit: 8,
}),
})
if (res.data.actors) {
for (const actor of res.data.actors) {
if (!searchResults.find(item => item.handle === actor.handle)) {
searchResults.push(actor)
}
}
}
} catch (e) {
logger.error('useActorSearch: searchActorsTypeahead failed', {error: e})
}
return searchResults
},
[agent, followsSearch, queryClient],
)
}
export class ActorAutocomplete {
// state
isLoading = false
isActive = false
prefix = ''
lock = new AwaitLock()
// data
suggestions: AppBskyActorDefs.ProfileViewBasic[] = []
constructor(
public agent: BskyAgent,
public follows?: AppBskyActorDefs.ProfileViewBasic[] | undefined,
) {}
setFollows(follows: AppBskyActorDefs.ProfileViewBasic[]) {
this.follows = follows
}
async query(prefix: string) {
const origPrefix = prefix.trim().toLocaleLowerCase()
this.prefix = origPrefix
await this.lock.acquireAsync()
try {
if (this.prefix) {
if (this.prefix !== origPrefix) {
return // another prefix was set before we got our chance
}
// start with follow results
this.suggestions = computeSuggestions(this.prefix, this.follows)
// ask backend
const res = await this.agent.searchActorsTypeahead({
term: this.prefix,
limit: 8,
})
this.suggestions = computeSuggestions(
this.prefix,
this.follows,
res.data.actors,
)
} else {
this.suggestions = computeSuggestions(this.prefix, this.follows)
}
} finally {
this.lock.release()
}
}
}
function computeSuggestions(
prefix: string,
follows: AppBskyActorDefs.ProfileViewBasic[] = [],
searched: AppBskyActorDefs.ProfileViewBasic[] = [],
) {
if (prefix) {
const items: AppBskyActorDefs.ProfileViewBasic[] = []
for (const item of follows) {
if (prefixMatch(prefix, item)) {
items.push(item)
}
if (items.length >= 8) {
break
}
}
for (const item of searched) {
if (!items.find(item2 => item2.handle === item.handle)) {
items.push({
did: item.did,
handle: item.handle,
displayName: item.displayName,
avatar: item.avatar,
})
}
}
return items
} else {
return follows
}
}
function prefixMatch(
prefix: string,
info: AppBskyActorDefs.ProfileViewBasic,
): boolean {
if (info.handle.includes(prefix)) {
return true
}
if (info.displayName?.toLocaleLowerCase().includes(prefix)) {
return true
}
return false
}
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