Done some basic things

src/main/java/de/derpandaa/plinfa/aiprovider/OpenAiProvider.java

@@ -0,0 +1,67 @@
+package de.derpandaa.plinfa.aiprovider;
+
+import java.net.URI;
+import java.net.http.HttpRequest;
+import java.util.List;
+
+import de.derpandaa.plinfa.dto.AiRequest;
+import de.derpandaa.plinfa.dto.AiResponseDto;
+import de.derpandaa.plinfa.dto.MessageDto;
+import de.derpandaa.plinfa.dto.OpenAiResponseDto;
+import tools.jackson.databind.node.ArrayNode;
+import tools.jackson.databind.node.ObjectNode;
+
+public class OpenAiProvider extends AbstractAiProvider {
+	public static String API_KEY;
+	private static int maxTokens;
+	private static OpenAiProvider openAiProvider;
+
+	public OpenAiProvider() {
+	}
+
+	@Override
+	public HttpRequest buildRequest(String jsonBody) {
+		return HttpRequest.newBuilder().uri(URI.create("https://api.openai.com/v1/chat/completions"))
+				.header("Content-Type", "application/json").header("Authorization", "Bearer " + API_KEY)
+				.POST(HttpRequest.BodyPublishers.ofString(jsonBody)).build();
+	}
+
+	@Override
+	public List<Model> getModels() {
+
+		return List.of(new Model("gpt-5-nano", this.getClass()));
+	}
+
+	@Override
+	public AiResponseDto parseResponse(String body) {
+		return new OpenAiResponseDto(body);
+	}
+
+	@Override
+	public String buildRequestBody(AiRequest request) throws Exception {
+
+		ObjectNode root = mapper.createObjectNode();
+
+		root.put("model", request.getModel().modelName());
+		root.put("max_completion_tokens", request.getMaxTokens());
+
+		if (request.getSystemPrompt() != null) {
+			ArrayNode messages = root.putArray("messages");
+
+			ObjectNode system = mapper.createObjectNode();
+			system.put("role", "system");
+			system.put("content", request.getSystemPrompt());
+			messages.add(system);
+
+			for (MessageDto m : request.getMessages()) {
+				ObjectNode msg = mapper.createObjectNode();
+				msg.put("role", m.getRole().name());
+				msg.put("content", m.getContent());
+				messages.add(msg);
+			}
+		}
+
+		return mapper.writeValueAsString(root);
+	}
+
+}