DevoteMeApiClient.java

package com.devoteme.minecraft.api;

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.concurrent.CompletableFuture;

public class DevoteMeApiClient {
  private final HttpClient client = HttpClient.newHttpClient();
  private final String baseUrl;
  private final String apiKeyOrNull;

  public DevoteMeApiClient(String baseUrl, String apiKey) {
    String b = baseUrl == null ? "" : baseUrl.trim();
    this.baseUrl = b.endsWith("/") ? b.substring(0, b.length() - 1) : b;
    this.apiKeyOrNull = (apiKey == null || apiKey.isBlank()) ? null : apiKey.trim();
  }

  public CompletableFuture<String> getJson(String path) {
    if (baseUrl.isEmpty()) {
      return CompletableFuture.failedFuture(new IllegalStateException("devoteme.baseUrl is empty"));
    }

    HttpRequest.Builder req = HttpRequest.newBuilder()
        .uri(URI.create(baseUrl + path))
        .GET()
        .header("Accept", "application/json");

    if (apiKeyOrNull != null) {
      req.header("x-access-token", apiKeyOrNull);
    }

    return client.sendAsync(req.build(), HttpResponse.BodyHandlers.ofString())
        .thenApply(resp -> {
          int sc = resp.statusCode();
          if (sc < 200 || sc >= 300) throw new RuntimeException("HTTP " + sc + " for " + path);
          return resp.body();
        });
  }
}