Geotouchka.mobile/app/(tabs)/index.tsx

import { Image, StyleSheet, Button, TextInput } from 'react-native';
import React, { useState, useEffect } from 'react';
import { HelloWave } from '@/components/HelloWave';
import ParallaxScrollView from '@/components/ParallaxScrollView';
import { ThemedText } from '@/components/ThemedText';
import { ThemedView } from '@/components/ThemedView';
import * as Location from 'expo-location';
import io, { Socket } from 'socket.io-client';

export default function HomeScreen() {
  const [btnColor, setBtnColor] = useState("#008000");
  const [broadcastState, setBroadcastState] = useState(false);
  const [token, setToken] = useState<string>(""); // State для ввода токена
  const [socket, setSocket] = useState<Socket | null>(null);

  useEffect(() => {
    // Очистка подключения при размонтировании компонента
    return () => {
      if (socket) {
        socket.disconnect();
      }
    };
  }, [socket]);

  const onPressSwitchBroadcast = () => {
    setBtnColor(btnColor === "#008000" ? "#FF0000" : "#008000");
    setBroadcastState(!broadcastState);
    
    if (socket) {
      socket.disconnect();
      setSocket(null);
    } else {
      if (token) {
        const newSocket = io(`ws://192.168.0.76:9992/ws/${token}/sendGeo`);
        newSocket.on('connect', () => {
          console.log('Connected to WebSocket Server');
        });

        newSocket.on('disconnect', () => {
          console.log('Disconnected from WebSocket Server');
        });

        newSocket.on('location_ack', (data) => {
          console.log('Location acknowledged by server:', data);
        });
        setSocket(newSocket);
      } else {
        console.error('Token is required to start the broadcast');
      }
    }
  };

  const getLocation = async () => {
    let { status } = await Location.requestForegroundPermissionsAsync();
    if (status !== 'granted') {
      console.error('Permission to access location was denied');
      return;
    }
    let location = await Location.getCurrentPositionAsync({});
    console.log('Location:', location);
    sendLocation(location.coords.latitude, location.coords.longitude);
  };

  const sendLocation = (latitude: number, longitude: number) => {
    if (socket) {
      const locationData = {
        latitude,
        longitude,
        token, // Include token in the message
      };
      socket.emit('location', locationData);
      console.log('Location sent:', locationData);
    }
  };

  useEffect(() => {
    if (broadcastState) {
      getLocation();
    }
  }, [broadcastState]);

  return (
    <ParallaxScrollView
      headerBackgroundColor={{ light: '#A1CEDC', dark: '#1D3D47' }}
      headerImage={
        <Image
          source={require('@/assets/images/partial-react-logo.png')}
          style={styles.reactLogo}
        />
      }>
      <ThemedView style={styles.titleContainer}>
        <ThemedText type="title">Welcome!</ThemedText>
        <HelloWave />
      </ThemedView>
      <ThemedView style={styles.stepContainer}>
        <ThemedText type="subtitle">Шаг 1: Введите токен</ThemedText>
        <ThemedText>
          Токен:
        </ThemedText>
        <TextInput
          style={styles.input}
          onChangeText={setToken}
          value={token}
          editable={!broadcastState} // Поле ввода будет неактивным, если трансляция активна
        />
      </ThemedView>
      <ThemedView style={styles.stepContainer}>
        <ThemedText type="subtitle">Step 2: Начать трансляцию геолокации</ThemedText>
        <ThemedText>
          Нажмите ниже для трансляции геолокации.
        </ThemedText>
        <Button
          onPress={onPressSwitchBroadcast}
          title={broadcastState ? "Остановить трансляцию" : "Начать трансляцию геолокации"}
          color={btnColor}
          accessibilityLabel="Learn more about this purple button"
        />
      </ThemedView>
    </ParallaxScrollView>
  );
}

const styles = StyleSheet.create({
  titleContainer: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 8,
  },
  stepContainer: {
    gap: 8,
    marginBottom: 8,
  },
  reactLogo: {
    height: 178,
    width: 290,
    bottom: 0,
    left: 0,
    position: 'absolute',
  },
  input: {
    height: 40,
    borderColor: 'gray',
    color: 'white',
    borderWidth: 1,
    padding: 8,
    margin: 10,
    borderRadius: 4,
  }
});