Customize tab bar in react native using react navigation

CustomReactNavigationTabbar.tsx

import React from 'react';
import { Component } from 'react';
import {
    TouchableOpacity,
    Text,
    View,
    Image
} from 'react-native';
import { TabBarBottomProps, NavigationRoute } from 'react-navigation';

// just for ide hints
interface TabBarProps extends TabBarBottomProps {

}

interface TabBarState {
}

class TabBar extends Component<TabBarProps, TabBarState> {

    navigationStateIndex = null;
    
    // call when each time user click different tab
    navigationAvaliableFuncs: {
        [key: string]: () => boolean
    } = {
            //Account: this._needSignIn.bind(this),
            //Progress: this._needSignIn.bind(this),
        }
  
    // call when clicking tab got refused
    navigationRefusedFuncs: {
        [key: string]: () => void
    } = {
            Account: this._refusedByNeedSignIn.bind(this),
            Progress: this._refusedByNeedSignIn.bind(this)
        }

    constructor(props: TabBarProps) {
        super(props);
    }

    /*  _needSignIn() {
        return !!this.props.authToken;
    } */

    /*_refusedByNeedSignIn() {
        const { navigation } = this.props;
        navigation.navigate('...');
    }*/
  
    // Main function to render tabbar
    renderTabBarButton(route: NavigationRoute, idx: any) {
        const {
            activeTintColor,
            inactiveTintColor,
            navigation,
            getLabelText,
            renderIcon,
        } = this.props;
        const currentIndex = navigation.state.index;
        const color = currentIndex === idx ? activeTintColor : inactiveTintColor;
        const label = getLabelText({ route, focused: currentIndex === idx, index: idx });
        return (
            <TouchableOpacity
                onPress={() => {
                    if (currentIndex != idx) {
                        if (this.isNavigateAvaliable(label as string)) {
                            navigation.navigate(route.routeName);
                        } else {
                            this._onNavigationRefused(label as string);
                        }
                    }
                }}
                style={StdStyles.tabBarButton}
                key={route.routeName}
            >
                {renderIcon({ route, tintColor: color, focused: currentIndex === idx, index: idx })}
                // uncomment if you need title under tab
                {/* <Text style={[ StdStyles.tabBarButtonText, { color }]}>
                    {label}
                </Text>  */}
            </TouchableOpacity>
        );
    }

    isNavigateAvaliable(label: string) {
        const func: any = this.navigationAvaliableFuncs[label];
        if (func) {
            return func();
        }
        return true;
    }

    _onNavigationRefused(label: string) {
        const func = this.navigationRefusedFuncs[label];
        if (func) {
            func();
        }
    }

    render() {
        
        const { navigation, style } = this.props;
        const tabBarButtons = navigation.state.routes.map(this.renderTabBarButton.bind(this));
        return (
            <View style={[StdStyles.tabBar, style]}>
                {tabBarButtons}
            </View>
        );
    }
}

// Possible extension with redux
// function mapStateToProps(state: any) {
//    return {
//        ....,
//    }
// }
// function mapDispatchToProps(dispatch) {
//     return bindActionCreators(..., dispatch);
// }
// const _TabBar = connect(mapStateToProps)(TabBar);
// export { _TabBar as TabBar };