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import {useCallback, useMemo, useRef, useState} from 'react'
import {type AppBskyUnspeccedGetPostThreadV2} from '@atproto/api'
import debounce from 'lodash.debounce'
import {OnceKey, useCallOnce} from '#/lib/hooks/useCallOnce'
import {logger} from '#/logger'
import {
usePreferencesQuery,
useSetThreadViewPreferencesMutation,
} from '#/state/queries/preferences'
import {type ThreadViewPreferences} from '#/state/queries/preferences/types'
import {type Literal} from '#/types/utils'
export type ThreadSortOption = Literal<
AppBskyUnspeccedGetPostThreadV2.QueryParams['sort'],
string
>
export type ThreadViewOption = 'linear' | 'tree'
export type ThreadPreferences = {
isLoaded: boolean
isSaving: boolean
sort: ThreadSortOption
setSort: (sort: string) => void
view: ThreadViewOption
setView: (view: ThreadViewOption) => void
prioritizeFollowedUsers: boolean
setPrioritizeFollowedUsers: (prioritize: boolean) => void
}
export function useThreadPreferences({
save,
}: {save?: boolean} = {}): ThreadPreferences {
const {data: preferences} = usePreferencesQuery()
const serverPrefs = preferences?.threadViewPrefs
const once = useCallOnce(OnceKey.PreferencesThread)
/*
* Create local state representations of server state
*/
const [sort, setSort] = useState(normalizeSort(serverPrefs?.sort || 'top'))
const [view, setView] = useState(
normalizeView({
treeViewEnabled: !!serverPrefs?.lab_treeViewEnabled,
}),
)
const [prioritizeFollowedUsers, setPrioritizeFollowedUsers] = useState(
!!serverPrefs?.prioritizeFollowedUsers,
)
/**
* If we get a server update, update local state
*/
const [prevServerPrefs, setPrevServerPrefs] = useState(serverPrefs)
const isLoaded = !!prevServerPrefs
if (serverPrefs && prevServerPrefs !== serverPrefs) {
setPrevServerPrefs(serverPrefs)
/*
* Update
*/
setSort(normalizeSort(serverPrefs.sort))
setPrioritizeFollowedUsers(serverPrefs.prioritizeFollowedUsers)
setView(
normalizeView({
treeViewEnabled: !!serverPrefs.lab_treeViewEnabled,
}),
)
once(() => {
logger.metric('thread:preferences:load', {
sort: serverPrefs.sort,
view: serverPrefs.lab_treeViewEnabled ? 'tree' : 'linear',
prioritizeFollowedUsers: serverPrefs.prioritizeFollowedUsers,
})
})
}
const userUpdatedPrefs = useRef(false)
const [isSaving, setIsSaving] = useState(false)
const {mutateAsync} = useSetThreadViewPreferencesMutation()
const savePrefs = useMemo(() => {
return debounce(async (prefs: ThreadViewPreferences) => {
try {
setIsSaving(true)
await mutateAsync(prefs)
logger.metric('thread:preferences:update', {
sort: prefs.sort,
view: prefs.lab_treeViewEnabled ? 'tree' : 'linear',
prioritizeFollowedUsers: prefs.prioritizeFollowedUsers,
})
} catch (e) {
logger.error('useThreadPreferences failed to save', {
safeMessage: e,
})
} finally {
setIsSaving(false)
}
}, 4e3)
}, [mutateAsync])
if (save && userUpdatedPrefs.current) {
savePrefs({
sort,
prioritizeFollowedUsers,
lab_treeViewEnabled: view === 'tree',
})
userUpdatedPrefs.current = false
}
const setSortWrapped = useCallback(
(next: string) => {
userUpdatedPrefs.current = true
setSort(normalizeSort(next))
},
[setSort],
)
const setViewWrapped = useCallback(
(next: ThreadViewOption) => {
userUpdatedPrefs.current = true
setView(next)
},
[setView],
)
const setPrioritizeFollowedUsersWrapped = useCallback(
(next: boolean) => {
userUpdatedPrefs.current = true
setPrioritizeFollowedUsers(next)
},
[setPrioritizeFollowedUsers],
)
return useMemo(
() => ({
isLoaded,
isSaving,
sort,
setSort: setSortWrapped,
view,
setView: setViewWrapped,
prioritizeFollowedUsers,
setPrioritizeFollowedUsers: setPrioritizeFollowedUsersWrapped,
}),
[
isLoaded,
isSaving,
sort,
setSortWrapped,
view,
setViewWrapped,
prioritizeFollowedUsers,
setPrioritizeFollowedUsersWrapped,
],
)
}
/**
* Migrates user thread preferences from the old sort values to V2
*/
export function normalizeSort(sort: string): ThreadSortOption {
switch (sort) {
case 'oldest':
return 'oldest'
case 'newest':
return 'newest'
default:
return 'top'
}
}
/**
* Transforms existing treeViewEnabled preference into a ThreadViewOption
*/
export function normalizeView({
treeViewEnabled,
}: {
treeViewEnabled: boolean
}): ThreadViewOption {
return treeViewEnabled ? 'tree' : 'linear'
}
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