WPD-MobileApp/src/app/screens/MapFeedScreen.js

import React, { useContext, useEffect, useState } from "react";
import { StyleSheet, View } from "react-native";
import MapView from "react-native-maps";

import colors from "../config/colors";
import { screen_width, screen_height } from "../config/dimensions";

import useMarkers from "../hooks/selectFromDB";
import MapMarker from "../components/MapMarker";
import attachFocusToQuery from "../hooks/useFocus";
import { CurrentLocationContext } from "../context/CurrentLocationContext";

function MapFeedScreen(props) {

  const context = useContext(CurrentLocationContext);
  const location = context.currentCoordinates;
  //const context = useContext(CurrentLocationContext)


  const hasToQuery = attachFocusToQuery();
  const markers = useMarkers(hasToQuery);

  // console.log(markers);
  const map_scale = 0.003;
  const lat_long_delta = {
    latitudeDelta: map_scale,
    longitudeDelta: map_scale * (screen_width / screen_height),
  };

  return (
    <View style={styles.container}>
      <MapView
        style={styles.mapStyle}
        showsUserLocation={true}
        initialRegion={{
          latitude: -22.1070263,
          longitude: -51.3948396,
          ...lat_long_delta,
        }}
        region={{
          latitude: location["latitude"],
          longitude: location["longitude"],
          ...lat_long_delta,
        }}
      >
        {[...markers.markers].map(({ ID, ...val }) => {
          return <MapMarker key={ID.toString()} {...val} />;
        })}
      </MapView>
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    backgroundColor: colors.black,
    flex: 1,
  },
  mapStyle: {
    position: "absolute",
    top: 0,
    left: 0,
    right: 0,
    bottom: 0,
  },
});

export default MapFeedScreen;