UCSBDiningMenuItemsService.java

package edu.ucsb.cs156.dining.services;

import edu.ucsb.cs156.dining.models.Entree;

import java.util.Arrays;
import java.util.List;
import com.fasterxml.jackson.databind.ObjectMapper;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

@Service
@Slf4j
public class UCSBDiningMenuItemsService {

    @Autowired private ObjectMapper objectMapper;

    @Value("${app.ucsb.api.consumer_key}")
    private String apiKey;

    private RestTemplate restTemplate = new RestTemplate();

    public UCSBDiningMenuItemsService(RestTemplateBuilder restTemplateBuilder) throws Exception {
        restTemplate = restTemplateBuilder.build();
    }

    public static final String ALL_MEAL_ITEMS_AT_A_DINING_COMMON_ENDPOINT =
      "https://api.ucsb.edu/dining/menu/v1/{date-time}/{dining-common-code}/{meal-code}";

    /**
   * Create a List of Entree from json representation
   * @param dateTime String of date in iso format
   * @param diningCommonCode String of dining common 
   * @param mealCode String of meal code
   * @return a list of menu items
   */

    public List<Entree> get(String dateTime, String diningCommonCode, String mealCode) throws JsonProcessingException {
        
        HttpHeaders headers = new HttpHeaders();
        headers.setAccept(List.of(MediaType.APPLICATION_JSON));
        headers.setContentType(MediaType.APPLICATION_JSON);
        headers.set("ucsb-api-key", this.apiKey);

        HttpEntity<String> entity = new HttpEntity<>(headers);
        String url = ALL_MEAL_ITEMS_AT_A_DINING_COMMON_ENDPOINT;
        url = url.replace("{date-time}", dateTime);
        url = url.replace("{dining-common-code}", diningCommonCode);
        url = url.replace("{meal-code}", mealCode);

        ResponseEntity<String> re = restTemplate.exchange(url, HttpMethod.GET, entity, String.class);
        String retBody = re.getBody();

        List<Entree> menuItems = objectMapper.readValue(retBody, new TypeReference<List<Entree>>() {});

        return menuItems;
    }

}