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docs: make chat app "Complete example" copy/paste ready #1603

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93 changes: 84 additions & 9 deletions docs/docs/guides/building-chat-app.mdx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -517,18 +517,19 @@ Here is a complete chat screen that ties together all the pieces — `KeyboardCh
import React, { forwardRef, useCallback, useRef, useState } from "react";
import {
FlatList,
type LayoutChangeEvent,
type ScrollViewProps,
StyleSheet,
Text,
TextInput,
TouchableOpacity,
View,
type LayoutChangeEvent,
type ScrollViewProps,
} from "react-native";
import {
KeyboardChatScrollView,
type KeyboardChatScrollViewRef,
KeyboardGestureArea,
KeyboardStickyView,
type KeyboardChatScrollViewRef,
} from "react-native-keyboard-controller";
import { useSharedValue, withTiming } from "react-native-reanimated";
import {
Expand All @@ -538,8 +539,17 @@ import {

import type { KeyboardChatScrollViewProps } from "react-native-keyboard-controller";

function Message({ text, sender }: { text: string; sender: boolean }) {
return (
<View style={sender ? styles.senderContainer : styles.recipientContainer}>
<Text style={styles.message}>{text}</Text>
</View>
);
}

const MARGIN = 8;
const INPUT_HEIGHT = 42;
const TEXT_INPUT_HEIGHT = INPUT_HEIGHT + MARGIN;

// Wrapper for virtualized lists
const ChatScrollView = forwardRef<
Expand All @@ -563,7 +573,9 @@ const ChatScrollView = forwardRef<
function ChatScreen() {
const textInputRef = useRef<TextInput>(null);
const textRef = useRef("");
const [messages, setMessages] = useState(INITIAL_MESSAGES);
const [messages, setMessages] = useState([
{ id: "1786111174702", text: "Hello", sender: false },
]);
const { bottom } = useSafeAreaInsets();
const extraContentPadding = useSharedValue(0);

Expand All @@ -576,9 +588,16 @@ function ChatScreen() {

const onSend = useCallback(() => {
const text = textRef.current.trim();
if (!text) return;

setMessages((prev) => [...prev, { id: String(Date.now()), text }]);
if (!text) {
return;
}

setMessages((prev) => [
// for inverted list we need to insert new message in the beginning of the history
{ id: String(Date.now()), text, sender: true },
...prev,
]);
textInputRef.current?.clear();
textRef.current = "";
}, []);
Expand All @@ -602,9 +621,9 @@ function ChatScreen() {
textInputNativeID="chat-input"
>
<FlatList
data={messages}
inverted
contentContainerStyle={{ paddingTop: INPUT_HEIGHT + MARGIN }}
contentContainerStyle={{ paddingTop: TEXT_INPUT_HEIGHT }}
data={messages}
keyExtractor={(item) => item.id}
renderItem={({ item }) => <Message {...item} />}
renderScrollComponent={renderScrollComponent}
Expand All @@ -622,14 +641,70 @@ function ChatScreen() {
onChangeText={(text) => (textRef.current = text)}
onLayout={onInputLayout}
/>
<TouchableOpacity onPress={onSend}>
<TouchableOpacity style={styles.send} onPress={onSend}>
<Text>Send</Text>
</TouchableOpacity>
</KeyboardStickyView>
</KeyboardGestureArea>
</SafeAreaView>
);
}

const container = {
borderRadius: 10,
padding: 10,
margin: 10,
marginVertical: 5,
maxWidth: "80%" as const,
};

const styles = StyleSheet.create({
container: {
justifyContent: "flex-end",
flex: 1,
backgroundColor: "#3A3A3C",
},
input: {
flex: 1,
margin: MARGIN,
marginBottom: 0,
padding: MARGIN,
borderRadius: 99,
borderWidth: 1,
borderColor: "#BCBCBC",
backgroundColor: "#3A3A3C66",
},
composer: {
position: "absolute",
width: "100%",
minHeight: TEXT_INPUT_HEIGHT,
flexDirection: "row",
},
send: {
right: MARGIN,
padding: MARGIN,
marginTop: MARGIN,
backgroundColor: "white",
justifyContent: "center",
borderRadius: 16,
marginLeft: MARGIN,
},
senderContainer: {
alignSelf: "flex-end",
backgroundColor: "#F8F8FC",
...container,
},
recipientContainer: {
alignSelf: "flex-start",
backgroundColor: "#64D2FF",
...container,
},
message: {
color: "#000000",
},
});

export default ChatScreen;
```

Or play with the code in live mode directly in the browser:
Expand Down
93 changes: 84 additions & 9 deletions docs/versioned_docs/version-1.22.0/guides/building-chat-app.mdx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -517,18 +517,19 @@ Here is a complete chat screen that ties together all the pieces — `KeyboardCh
import React, { forwardRef, useCallback, useRef, useState } from "react";
import {
FlatList,
type LayoutChangeEvent,
type ScrollViewProps,
StyleSheet,
Text,
TextInput,
TouchableOpacity,
View,
type LayoutChangeEvent,
type ScrollViewProps,
} from "react-native";
import {
KeyboardChatScrollView,
type KeyboardChatScrollViewRef,
KeyboardGestureArea,
KeyboardStickyView,
type KeyboardChatScrollViewRef,
} from "react-native-keyboard-controller";
import { useSharedValue, withTiming } from "react-native-reanimated";
import {
Expand All @@ -538,8 +539,17 @@ import {

import type { KeyboardChatScrollViewProps } from "react-native-keyboard-controller";

function Message({ text, sender }: { text: string; sender: boolean }) {
return (
<View style={sender ? styles.senderContainer : styles.recipientContainer}>
<Text style={styles.message}>{text}</Text>
</View>
);
}

const MARGIN = 8;
const INPUT_HEIGHT = 42;
const TEXT_INPUT_HEIGHT = INPUT_HEIGHT + MARGIN;

// Wrapper for virtualized lists
const ChatScrollView = forwardRef<
Expand All @@ -563,7 +573,9 @@ const ChatScrollView = forwardRef<
function ChatScreen() {
const textInputRef = useRef<TextInput>(null);
const textRef = useRef("");
const [messages, setMessages] = useState(INITIAL_MESSAGES);
const [messages, setMessages] = useState([
{ id: "1786111174702", text: "Hello", sender: false },
]);
const { bottom } = useSafeAreaInsets();
const extraContentPadding = useSharedValue(0);

Expand All @@ -576,9 +588,16 @@ function ChatScreen() {

const onSend = useCallback(() => {
const text = textRef.current.trim();
if (!text) return;

setMessages((prev) => [...prev, { id: String(Date.now()), text }]);
if (!text) {
return;
}

setMessages((prev) => [
// for inverted list we need to insert new message in the beginning of the history
{ id: String(Date.now()), text, sender: true },
...prev,
]);
textInputRef.current?.clear();
textRef.current = "";
}, []);
Expand All @@ -602,9 +621,9 @@ function ChatScreen() {
textInputNativeID="chat-input"
>
<FlatList
data={messages}
inverted
contentContainerStyle={{ paddingTop: INPUT_HEIGHT + MARGIN }}
contentContainerStyle={{ paddingTop: TEXT_INPUT_HEIGHT }}
data={messages}
keyExtractor={(item) => item.id}
renderItem={({ item }) => <Message {...item} />}
renderScrollComponent={renderScrollComponent}
Expand All @@ -622,14 +641,70 @@ function ChatScreen() {
onChangeText={(text) => (textRef.current = text)}
onLayout={onInputLayout}
/>
<TouchableOpacity onPress={onSend}>
<TouchableOpacity style={styles.send} onPress={onSend}>
<Text>Send</Text>
</TouchableOpacity>
</KeyboardStickyView>
</KeyboardGestureArea>
</SafeAreaView>
);
}

const container = {
borderRadius: 10,
padding: 10,
margin: 10,
marginVertical: 5,
maxWidth: "80%" as const,
};

const styles = StyleSheet.create({
container: {
justifyContent: "flex-end",
flex: 1,
backgroundColor: "#3A3A3C",
},
input: {
flex: 1,
margin: MARGIN,
marginBottom: 0,
padding: MARGIN,
borderRadius: 99,
borderWidth: 1,
borderColor: "#BCBCBC",
backgroundColor: "#3A3A3C66",
},
composer: {
position: "absolute",
width: "100%",
minHeight: TEXT_INPUT_HEIGHT,
flexDirection: "row",
},
send: {
right: MARGIN,
padding: MARGIN,
marginTop: MARGIN,
backgroundColor: "white",
justifyContent: "center",
borderRadius: 16,
marginLeft: MARGIN,
},
senderContainer: {
alignSelf: "flex-end",
backgroundColor: "#F8F8FC",
...container,
},
recipientContainer: {
alignSelf: "flex-start",
backgroundColor: "#64D2FF",
...container,
},
message: {
color: "#000000",
},
});

export default ChatScreen;
```

Or play with the code in live mode directly in the browser:
Expand Down