public JSONObject updateQuestion(JSONRPC2Request req, HttpServletRequest request)
throws JSONRPC2Error, Exception {
JSONObject jsonUpdateQuestion = new JSONObject();
// get question
Map<String, Object> params = req.getNamedParams();
NamedParamsRetriever np = new NamedParamsRetriever(params);
Map<String, Object> qParams = np.getMap("question");
NamedParamsRetriever questionNp = new NamedParamsRetriever(qParams);
int questionId = questionNp.getInt("id");
String questionBody = questionNp.getString("body");
String questionAnswer = questionNp.getString("answer");
int qOwnerId = questionNp.getInt("ownerId");
User u = getCurrentUser(request);
// check if this is the owner of the question
if (u.getId() == qOwnerId) {
// update question in database
Question qUpdated =
QuestionController.updateQuestion(questionId, questionBody, questionAnswer);
// return result
jsonUpdateQuestion.put("question", qUpdated.toJSONObject());
return jsonUpdateQuestion;
} else {
throw new Exception("no privileges");
}
}
public JSONObject deleteQuestion(JSONRPC2Request req, HttpServletRequest request)
throws JSONRPC2Error, Exception {
// create json object for the result
JSONObject jsonDeleteQuestion = new JSONObject();
// get question id
Map<String, Object> params = req.getNamedParams();
NamedParamsRetriever np = new NamedParamsRetriever(params);
Map<String, Object> qParams = np.getMap("question");
NamedParamsRetriever questionNp = new NamedParamsRetriever(qParams);
int questionId = questionNp.getInt("id");
int qOwnwerId = questionNp.getInt("ownerId");
User u = getCurrentUser(request);
// check for user privilleges
if (u.getId() == qOwnwerId) {
// remove question from database
QuestionController.deleteQuestion(questionId);
// send result
return jsonDeleteQuestion;
} else {
System.out.println("current user id: " + u.getId());
System.out.println("question owner id: " + qOwnwerId);
throw new Exception("no privileges");
}
}
public JSONObject addQuestion(JSONRPC2Request req, HttpServletRequest request)
throws JSONRPC2Error {
// json object for the result
JSONObject jsonAddQuestion = new JSONObject();
// get question
System.out.println(req.toString());
Map<String, Object> params = req.getNamedParams();
NamedParamsRetriever np = new NamedParamsRetriever(params);
Map<String, Object> qParams = np.getMap("question");
NamedParamsRetriever questionNp = new NamedParamsRetriever(qParams);
String body = questionNp.getString("body");
String answer = questionNp.getString("answer");
// get user
User u = getCurrentUser(request);
int userID = (int) u.getId();
System.out.println("current user id" + userID);
// return ID of Question if added successfully
Question q = QuestionController.addQuestion(body, answer, userID);
jsonAddQuestion.put("question", q.toJSONObject());
return jsonAddQuestion;
}
public JSONObject loadTestAndAllQuestions(JSONRPC2Request req, HttpServletRequest request)
throws Exception {
JSONObject jsonResult = new JSONObject();
JSONArray jsonAllQuestions = new JSONArray();
JSONObject jsonTest = new JSONObject();
// retrievers
Map<String, Object> params = req.getNamedParams();
NamedParamsRetriever np = new NamedParamsRetriever(params);
Map<String, Object> tParams = np.getMap("test");
NamedParamsRetriever testNp = new NamedParamsRetriever(tParams);
int tid = testNp.getInt("id");
// get data from DB
MySQLDAO dao = new MySQLDAO();
Test t = dao.loadTest(tid);
QuestionsList allQuestions = QuestionController.loadAllQuestions();
// set result
jsonTest = t.toJSONObject();
jsonAllQuestions = allQuestions.toJSONArray();
jsonResult.put("test", jsonTest);
jsonResult.put("questions", jsonAllQuestions);
return jsonResult;
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// declare rpc objects
JSONRPC2Request req = null;
JSONRPC2Response resp = null;
try {
/*
* Had to change this, since after switching to the JS json-rpc lib
* the request has no params ("json=" in our case) and the whole payload is the request data itself
*/
StringBuffer jb = new StringBuffer();
String line = null;
// Getting the request reader in order to load the whole request date into a single string
BufferedReader reader = request.getReader();
while ((line = reader.readLine()) != null) jb.append(line);
// populate rpc objects
req = JSONRPC2Request.parse(jb.toString());
resp = new JSONRPC2Response(req.getID());
// define jsonResult
JSONObject jsonResult = new JSONObject();
// retrieve request information
String method = req.getMethod();
System.out.println(req.getMethod());
// find the requested method
if (method.equals("login")) {
// login user
jsonResult = loginUser(request, response, req);
System.out.println("json result: " + jsonResult.toString());
// resp.setResult(jsonResult.toJSONString());
resp.setResult(jsonResult);
} else if (method.equals("register")) {
// register user
// TODO duplicates!
jsonResult = registerUser(req, resp);
System.out.println("json result to string: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (isLoggedIn(request)) {
if (method.equals("logout")) {
// logout user
jsonResult = logoutUser(request);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (method.equals("loadAllQuestions")) {
// return all questions as QuestionsList
QuestionsList questions = QuestionController.loadAllQuestions();
if (questions != null) {
JSONObject jsonQuestions = new JSONObject();
JSONArray allQuestions = questions.toJSONArray();
jsonQuestions.put("allQuestions", allQuestions);
System.out.println("jsonQuestions: " + jsonQuestions.toString());
resp.setResult(jsonQuestions);
} else {
resp.setError(JSONRPC2Error.INTERNAL_ERROR);
}
} else if (method.equals("loadQuestion")) {
jsonResult = loadQuestion(req, request);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (method.equals("addQuestion")) {
// add question
jsonResult = addQuestion(req, request);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (method.equals("deleteQuestion")) {
// delete question
jsonResult = deleteQuestion(req, request);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (method.equals("udpateQuestion")) {
// update question
jsonResult = updateQuestion(req, request);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (method.equals("loadTestAndAllQuestions")) {
// return the test and all questions from the database
jsonResult = loadTestAndAllQuestions(req, request);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (method.equals("loadAllTests")) {
// return all questions as QuestionsList
TestsList tests = TestController.loadAllTests();
if (tests != null) {
JSONObject jsonTests = new JSONObject();
JSONArray allTests = tests.toJSONArray();
jsonTests.put("allTests", allTests);
System.out.println("jsonTests: " + jsonTests.toString());
resp.setResult(jsonTests);
} else {
resp.setError(JSONRPC2Error.INTERNAL_ERROR);
}
} else if (method.equals("loadQuestionsByTest")) {
JSONArray testQuestions = new JSONArray();
testQuestions = loadQuestionsByTest(req, request);
jsonResult.put("testQuestions", testQuestions);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (method.equals("addTest")) {
// add question
jsonResult = addTest(req, request);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (method.equals("deleteTest")) {
// delete question
jsonResult = deleteTest(req, request);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (method.equals("updateTest")) {
// update question
jsonResult = updateTest(req, request);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (method.equals("addTestQuestion")) {
// bind question to test
jsonResult = addTestQuestion(req, request);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (method.equals("removeTestQuestion")) {
// delete question from test
jsonResult = removeTestQuestion(req, request);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
} else if (method.equals("checkTest")) {
// check if test is asnwered correctly
jsonResult = checkTest(req, request);
System.out.println("json result: " + jsonResult.toString());
resp.setResult(jsonResult);
}
/*
JSONObject json = new JSONObject();
json.put("hi", "opa");
resp.setResult(json.toJSONString());
*/
}
} catch (Throwable t) {
JSONRPC2Error error = new JSONRPC2Error(1, t.getMessage());
resp.setError(error);
} finally {
// dispatch result
response.getWriter().print(resp.toJSONObject().toJSONString());
System.out.println("final result: " + resp.toJSONObject().toJSONString());
}
}