IndexController.java

package com.unbabel.challenge.controller;

import com.unbabel.challenge.model.Message;
import com.unbabel.challenge.repositories.MessageRepository;
import org.apache.commons.lang.RandomStringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;

@Controller
public class IndexController {

    @Autowired
    MessageRepository messageRepository;

    @Value("${java.challenge.company}")
    private String company; // Reads this value from Spring properties file

    /**
     * Accepts get requests to the "/" url, generates random messages
     * and renders them in thymeleaf template (index.html).
     * @param model inject objects into thymeleaf template
     * @return generated html page using thymeleaf
     */
    @GetMapping("/")
    public String main(Model model) {
        generateNMessages(10);
        //set variables to be used in thymeleaf template
        model.addAttribute("company", company);
        model.addAttribute("messages", messageRepository.findAll());

        return "index"; //thymeleaf template name (index -> index.html)
    }


    /**
     * Deletes all messages and inserts new random ones
     * @param repetitions number of times to loop
     */
    private void generateNMessages(int repetitions) {
        messageRepository.deleteAll(); //clean all random str
        for (int i = 0; i < repetitions; i++) {
            messageRepository.save(new Message(RandomStringUtils.randomAlphabetic(30)));
        }
    }


}