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import React, {useEffect, useMemo, useState} from 'react'
import {observer} from 'mobx-react-lite'
import {
ActivityIndicator,
KeyboardAvoidingView,
SafeAreaView,
StyleSheet,
Text,
TextInput,
TouchableOpacity,
View,
} from 'react-native'
import LinearGradient from 'react-native-linear-gradient'
import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
import {UserAutocompleteViewModel} from '../../../state/models/user-autocomplete-view'
import {Autocomplete} from './Autocomplete'
import Toast from '../util/Toast'
import ProgressCircle from '../util/ProgressCircle'
import {useStores} from '../../../state'
import * as apilib from '../../../state/lib/api'
import {ComposerOpts} from '../../../state/models/shell-ui'
import {s, colors, gradients} from '../../lib/styles'
const MAX_TEXT_LENGTH = 256
const WARNING_TEXT_LENGTH = 200
const DANGER_TEXT_LENGTH = MAX_TEXT_LENGTH
export const ComposePost = observer(function ComposePost({
replyTo,
onPost,
onClose,
}: {
replyTo?: ComposerOpts['replyTo']
onPost?: ComposerOpts['onPost']
onClose: () => void
}) {
const store = useStores()
const [isProcessing, setIsProcessing] = useState(false)
const [error, setError] = useState('')
const [text, setText] = useState('')
const autocompleteView = useMemo<UserAutocompleteViewModel>(
() => new UserAutocompleteViewModel(store),
[],
)
useEffect(() => {
autocompleteView.setup()
})
const onChangeText = (newText: string) => {
setText(newText)
const prefix = extractTextAutocompletePrefix(newText)
if (typeof prefix === 'string') {
autocompleteView.setActive(true)
autocompleteView.setPrefix(prefix)
} else {
autocompleteView.setActive(false)
}
}
const onPressCancel = () => {
onClose()
}
const onPressPublish = async () => {
if (isProcessing) {
return
}
if (text.length > MAX_TEXT_LENGTH) {
return
}
setError('')
if (text.trim().length === 0) {
setError('Did you want to say anything?')
return false
}
setIsProcessing(true)
try {
await apilib.post(store, text, replyTo, autocompleteView.knownHandles)
} catch (e: any) {
console.error(`Failed to create post: ${e.toString()}`)
setError(
'Post failed to upload. Please check your Internet connection and try again.',
)
setIsProcessing(false)
return
}
onPost?.()
onClose()
Toast.show(`Your ${replyTo ? 'reply' : 'post'} has been published`, {
duration: Toast.durations.LONG,
position: Toast.positions.TOP,
shadow: true,
animation: true,
hideOnPress: true,
})
}
const onSelectAutocompleteItem = (item: string) => {
setText(replaceTextAutocompletePrefix(text, item))
autocompleteView.setActive(false)
}
const canPost = text.length <= MAX_TEXT_LENGTH
const progressColor =
text.length > DANGER_TEXT_LENGTH
? '#e60000'
: text.length > WARNING_TEXT_LENGTH
? '#f7c600'
: undefined
const textDecorated = useMemo(() => {
return (text || '').split(/(\s)/g).map((item, i) => {
if (
/^@[a-zA-Z0-9\.-]+$/g.test(item) &&
autocompleteView.knownHandles.has(item.slice(1))
) {
return (
<Text key={i} style={{color: colors.blue3}}>
{item}
</Text>
)
}
return item
})
}, [text])
return (
<KeyboardAvoidingView behavior="padding" style={styles.outer}>
<SafeAreaView style={s.flex1}>
<View style={styles.topbar}>
<TouchableOpacity onPress={onPressCancel}>
<Text style={[s.blue3, s.f16]}>Cancel</Text>
</TouchableOpacity>
<View style={s.flex1} />
{isProcessing ? (
<View style={styles.postBtn}>
<ActivityIndicator />
</View>
) : canPost ? (
<TouchableOpacity onPress={onPressPublish}>
<LinearGradient
colors={[gradients.primary.start, gradients.primary.end]}
start={{x: 0, y: 0}}
end={{x: 1, y: 1}}
style={styles.postBtn}>
<Text style={[s.white, s.f16, s.bold]}>Post</Text>
</LinearGradient>
</TouchableOpacity>
) : (
<View style={[styles.postBtn, {backgroundColor: colors.gray1}]}>
<Text style={[s.gray5, s.f16, s.bold]}>Post</Text>
</View>
)}
</View>
{error !== '' && (
<View style={styles.errorLine}>
<View style={styles.errorIcon}>
<FontAwesomeIcon
icon="exclamation"
style={{color: colors.red4}}
size={10}
/>
</View>
<Text style={s.red4}>{error}</Text>
</View>
)}
<TextInput
multiline
scrollEnabled
autoFocus
onChangeText={(text: string) => onChangeText(text)}
placeholder={replyTo ? 'Write your reply' : "What's new?"}
style={styles.textInput}>
{textDecorated}
</TextInput>
<View
style={[s.flexRow, {alignItems: 'center'}, s.pt10, s.pb10, s.pr5]}>
<View style={s.flex1} />
<Text style={[s.mr10, {color: progressColor}]}>
{text.length} / {MAX_TEXT_LENGTH}
</Text>
<View>
<ProgressCircle
color={progressColor}
progress={text.length / MAX_TEXT_LENGTH}
/>
</View>
</View>
<Autocomplete
active={autocompleteView.isActive}
items={autocompleteView.suggestions}
onSelect={onSelectAutocompleteItem}
/>
</SafeAreaView>
</KeyboardAvoidingView>
)
})
const atPrefixRegex = /@([\S]*)$/i
function extractTextAutocompletePrefix(text: string) {
const match = atPrefixRegex.exec(text)
if (match) {
return match[1]
}
return undefined
}
function replaceTextAutocompletePrefix(text: string, item: string) {
return text.replace(atPrefixRegex, `@${item} `)
}
const styles = StyleSheet.create({
outer: {
flexDirection: 'column',
backgroundColor: '#fff',
padding: 15,
height: '100%',
},
topbar: {
flexDirection: 'row',
alignItems: 'center',
paddingTop: 10,
paddingBottom: 5,
paddingHorizontal: 5,
height: 50,
},
postBtn: {
borderRadius: 20,
paddingHorizontal: 20,
paddingVertical: 6,
},
errorLine: {
flexDirection: 'row',
backgroundColor: colors.red1,
borderRadius: 6,
paddingHorizontal: 8,
paddingVertical: 6,
marginVertical: 6,
},
errorIcon: {
borderWidth: 1,
borderColor: colors.red4,
color: colors.red4,
borderRadius: 30,
width: 16,
height: 16,
alignItems: 'center',
justifyContent: 'center',
marginRight: 5,
},
textInput: {
flex: 1,
padding: 5,
fontSize: 21,
},
})
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