3prktk

import React, {Component} from 'react';


class App extends Component {

    constructor(props){
        super(props)
        this.onHandleUsers = this.onHandleUsers.bind(this)
        this.tekstas = "abc";

        this.state = {
            isLoaded: false,
            users: []
        }
    }




    handleUserChange = (e) => {
        const {value} = e.target
        this.onHandleCurrentUsers(value)
        this.tekstas = this.onHandleCurrentUsers(value)

      }

    onHandleUsers() {
        fetch("http://localhost:3000/api/users")
        .then(res => res.json())
        .then(result => {
            this.setState({
                isLoaded: true,
                users: result
            })
        })
        .catch(e => console.log(e))
    }

    onHandleCurrentUsers(userId) {
        const data = {userId: userId}
        fetch("http://localhost:3000/api/user", {
            method: 'POST',
            headers: { "Content-Type": "application/json"},
            body: JSON.stringify(data)
        })
        .then(res => res.json())
        .then(result => {
            this.setState({
                isLoaded: false,
                currentUser: result
            })
        })
        .catch(e => console.log(e))
    }




    render() {
        const {currentUser} = this.state
        return (
            <div>


                <button onClick={this.onHandleUsers}>Gauti vartotojus</button>
                <ul>
                    {
                        this.state.isLoaded && this.state.users.map(item => {
                            return (
                                <ol>Vardas: {item.name} <br>
                                </br>Pavardė: {item.surname}</ol>
                        )
                        })
                    }

                </ul>
                <button onClick ={e => this.onHandleCurrentUsers(1)}>Gauti pirma vartotoja</button>
                <button onClick ={e => this.onHandleCurrentUsers(2)}>Gauti antra vartotoja</button>
                <div>
                    {
                        currentUser && <div>{currentUser.name} {currentUser.surname}</div>
                    }
                </div>

                    <br></br>
                        {/* antra dalis */}
                <div>

                <input name='userId' onChange={this.handleUserChange} />
                    {this.tekstas}
                 </div>

                    <div> </div>
        </div>

        )
    }
    }


    export default App