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import {useRef} from 'react'
import {View} from 'react-native'
import Animated, {FadeInDown, FadeOut} from 'react-native-reanimated'
import {AppBskyActorDefs} from '@atproto/api'
import {Trans} from '@lingui/macro'
import {PressableScale} from '#/lib/custom-animations/PressableScale'
import {sanitizeDisplayName} from '#/lib/strings/display-names'
import {sanitizeHandle} from '#/lib/strings/handles'
import {useActorAutocompleteQuery} from '#/state/queries/actor-autocomplete'
import {UserAvatar} from '#/view/com/util/UserAvatar'
import {atoms as a, useTheme} from '#/alf'
import {Text} from '#/components/Typography'
import {useGrapheme} from '../hooks/useGrapheme'
export function Autocomplete({
prefix,
onSelect,
}: {
prefix: string
onSelect: (item: string) => void
}) {
const t = useTheme()
const {getGraphemeString} = useGrapheme()
const isActive = !!prefix
const {data: suggestions, isFetching} = useActorAutocompleteQuery(prefix)
const suggestionsRef = useRef<
AppBskyActorDefs.ProfileViewBasic[] | undefined
>(undefined)
if (suggestions) {
suggestionsRef.current = suggestions
}
if (!isActive) return null
return (
<Animated.View
entering={FadeInDown.duration(200)}
exiting={FadeOut.duration(100)}
style={[
t.atoms.bg,
a.mt_sm,
a.border,
a.rounded_sm,
t.atoms.border_contrast_high,
{marginLeft: -62},
]}>
{suggestionsRef.current?.length ? (
suggestionsRef.current.slice(0, 5).map((item, index, arr) => {
// Eventually use an average length
const MAX_CHARS = 40
const MAX_HANDLE_CHARS = 20
// Using this approach because styling is not respecting
// bounding box wrapping (before converting to ellipsis)
const {name: displayHandle, remainingCharacters} = getGraphemeString(
item.handle,
MAX_HANDLE_CHARS,
)
const {name: displayName} = getGraphemeString(
item.displayName || item.handle,
MAX_CHARS -
MAX_HANDLE_CHARS +
(remainingCharacters > 0 ? remainingCharacters : 0),
)
return (
<View
style={[
index !== arr.length - 1 && a.border_b,
t.atoms.border_contrast_high,
a.px_sm,
a.py_md,
]}
key={item.handle}>
<PressableScale
testID="autocompleteButton"
style={[
a.flex_row,
a.gap_sm,
a.justify_between,
a.align_center,
]}
onPress={() => onSelect(item.handle)}
accessibilityLabel={`Select ${item.handle}`}
accessibilityHint="">
<View style={[a.flex_row, a.gap_sm, a.align_center]}>
<UserAvatar
avatar={item.avatar ?? null}
size={24}
type={item.associated?.labeler ? 'labeler' : 'user'}
/>
<Text
style={[a.text_md, a.font_bold]}
emoji={true}
numberOfLines={1}>
{sanitizeDisplayName(displayName)}
</Text>
</View>
<Text style={[t.atoms.text_contrast_medium]} numberOfLines={1}>
{sanitizeHandle(displayHandle, '@')}
</Text>
</PressableScale>
</View>
)
})
) : (
<Text style={[a.text_md, a.px_sm, a.py_md]}>
{isFetching ? <Trans>Loading...</Trans> : <Trans>No result</Trans>}
</Text>
)}
</Animated.View>
)
}
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