1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
import React, {useCallback, useRef} from 'react'
import {
FlatList,
NativeScrollEvent,
NativeSyntheticEvent,
View,
} from 'react-native'
import {KeyboardAvoidingView} from 'react-native-keyboard-controller'
import {msg, Trans} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import {useChat} from '#/state/messages'
import {ConvoItem, ConvoStatus} from '#/state/messages/convo'
import {isWeb} from 'platform/detection'
import {MessageInput} from '#/screens/Messages/Conversation/MessageInput'
import {MessageItem} from '#/screens/Messages/Conversation/MessageItem'
import {Button, ButtonText} from '#/components/Button'
import {Loader} from '#/components/Loader'
import {Text} from '#/components/Typography'
function MaybeLoader({isLoading}: {isLoading: boolean}) {
return (
<View
style={{
height: 50,
width: '100%',
alignItems: 'center',
justifyContent: 'center',
}}>
{isLoading && <Loader size="xl" />}
</View>
)
}
function RetryButton({onPress}: {onPress: () => unknown}) {
const {_} = useLingui()
return (
<View style={{alignItems: 'center'}}>
<Button
label={_(msg`Press to Retry`)}
onPress={onPress}
variant="ghost"
color="negative"
size="small">
<ButtonText>
<Trans>Press to Retry</Trans>
</ButtonText>
</Button>
</View>
)
}
function renderItem({item}: {item: ConvoItem}) {
if (item.type === 'message' || item.type === 'pending-message') {
return <MessageItem item={item.message} next={item.nextMessage} />
} else if (item.type === 'deleted-message') {
return <Text>Deleted message</Text>
} else if (item.type === 'pending-retry') {
return <RetryButton onPress={item.retry} />
}
return null
}
function keyExtractor(item: ConvoItem) {
return item.key
}
function onScrollToEndFailed() {
// Placeholder function. You have to give FlatList something or else it will error.
}
export function MessagesList() {
const chat = useChat()
const flatListRef = useRef<FlatList>(null)
// We use this to know if we should scroll after a new clop is added to the list
const isAtBottom = useRef(false)
const currentOffset = React.useRef(0)
const onContentSizeChange = useCallback(() => {
if (currentOffset.current <= 100) {
flatListRef.current?.scrollToOffset({offset: 0, animated: true})
}
}, [])
const onEndReached = useCallback(() => {
chat.service.fetchMessageHistory()
}, [chat])
const onInputFocus = useCallback(() => {
if (!isAtBottom.current) {
flatListRef.current?.scrollToOffset({offset: 0, animated: true})
}
}, [])
const onInputBlur = useCallback(() => {}, [])
const onSendMessage = useCallback(
(text: string) => {
chat.service.sendMessage({
text,
})
},
[chat.service],
)
const onScroll = React.useCallback(
(e: NativeSyntheticEvent<NativeScrollEvent>) => {
currentOffset.current = e.nativeEvent.contentOffset.y
},
[],
)
return (
<KeyboardAvoidingView
style={{flex: 1, marginBottom: isWeb ? 20 : 85}}
behavior="padding"
keyboardVerticalOffset={70}
contentContainerStyle={{flex: 1}}>
<FlatList
data={
chat.state.status === ConvoStatus.Ready ? chat.state.items : undefined
}
keyExtractor={keyExtractor}
renderItem={renderItem}
contentContainerStyle={{paddingHorizontal: 10}}
// In the future, we might want to adjust this value. Not very concerning right now as long as we are only
// dealing with text. But whenever we have images or other media and things are taller, we will want to lower
// this...probably.
initialNumToRender={20}
// Same with the max to render per batch. Let's be safe for now though.
maxToRenderPerBatch={25}
inverted={true}
onEndReached={onEndReached}
onScrollToIndexFailed={onScrollToEndFailed}
onContentSizeChange={onContentSizeChange}
onScroll={onScroll}
// We don't really need to call this much since there are not any animations that rely on this
scrollEventThrottle={100}
maintainVisibleContentPosition={{
minIndexForVisible: 1,
}}
ListFooterComponent={
<MaybeLoader
isLoading={
chat.state.status === ConvoStatus.Ready &&
chat.state.isFetchingHistory
}
/>
}
removeClippedSubviews={true}
ref={flatListRef}
keyboardDismissMode="none"
/>
<View style={{paddingHorizontal: 10}}>
<MessageInput
onSendMessage={onSendMessage}
onFocus={onInputFocus}
onBlur={onInputBlur}
/>
</View>
</KeyboardAvoidingView>
)
}
|
