0.0.1 | Basic Functions

2026-06-01 18:05:05 +02:00
commit 83698102ed
11 changed files with 557 additions and 0 deletions
@@ -0,0 +1,69 @@
+package de.winniepat.licenselib;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonObject;
+import de.winniepat.winnielib.http.Http;
+import de.winniepat.winnielib.http.HttpResponse;
+
+import java.net.http.HttpClient;
+
+/**
+ * A client for checking plugin licenses against a license server.
+ */
+public class LicenseClient {
+
+    private static final Gson GSON = new Gson();
+    private static final HttpClient HTTP_CLIENT = HttpClient.newHttpClient();
+
+    /**
+     * Private constructor to prevent instantiation of this utility class.
+     */
+    private LicenseClient() {
+        throw new UnsupportedOperationException("Utility class");
+    }
+
+    /**
+     * Checks the validity of a license key for a given plugin and server ID against the license server API.
+     * @param apiUrl Server API url
+     * @param plugin Plugin id matching the one on the backend api
+     * @param licenseKey License key issued by the api
+     * @param serverId Server id matching the one on the backend api
+     * @return LicenseResult with the data from the backend
+     */
+    public static LicenseResult check(
+            String apiUrl,
+            String plugin,
+            String licenseKey,
+            String serverId
+    ) {
+
+        Http http = new Http();
+
+        JsonObject payload = new JsonObject();
+        payload.addProperty("plugin", plugin);
+        payload.addProperty("licenseKey", licenseKey);
+        payload.addProperty("serverId", serverId);
+
+        HttpResponse response = http.post(apiUrl, GSON.toJson(payload));
+
+        JsonObject json = GSON.fromJson(response.body(), JsonObject.class);
+
+        return new LicenseResult(
+                json.get("valid").getAsBoolean(),
+                json.get("status").getAsString(),
+                json.get("message").getAsString()
+        );
+    }
+
+    /**
+     * Represents the result of a license check.
+     * @param isValid boolean if the license is valid or not
+     * @param status license status
+     * @param message additional message from the backend
+     */
+    public record LicenseResult(
+            boolean isValid,
+            String status,
+            String message
+    ) { }
+}