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/*
* Copyright 2013 Jesse Morgan
*/
package com.p4square.grow.backend.resources;
import java.io.IOException;
import java.util.Map;
import java.util.HashMap;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.restlet.data.MediaType;
import org.restlet.data.Status;
import org.restlet.representation.Representation;
import org.restlet.representation.StringRepresentation;
import org.restlet.resource.ServerResource;
import org.apache.log4j.Logger;
import com.p4square.grow.backend.GrowBackend;
import com.p4square.grow.model.Answer;
import com.p4square.grow.model.Question;
import com.p4square.grow.model.RecordedAnswer;
import com.p4square.grow.model.Score;
import com.p4square.grow.model.UserRecord;
import com.p4square.grow.provider.CollectionProvider;
import com.p4square.grow.provider.Provider;
/**
* Store the user's answers to the assessment and generate their score.
*
* @author Jesse Morgan <jesse@jesterpm.net>
*/
public class SurveyResultsResource extends ServerResource {
private static final Logger LOG = Logger.getLogger(SurveyResultsResource.class);
private static final ObjectMapper MAPPER = new ObjectMapper();
static enum RequestType {
ASSESSMENT, ANSWER
}
private CollectionProvider<String, String, String> mAnswerProvider;
private Provider<String, Question> mQuestionProvider;
private Provider<String, UserRecord> mUserRecordProvider;
private RequestType mRequestType;
private String mUserId;
private String mQuestionId;
@Override
public void doInit() {
super.doInit();
final GrowBackend backend = (GrowBackend) getApplication();
mAnswerProvider = backend.getAnswerProvider();
mQuestionProvider = backend.getQuestionProvider();
mUserRecordProvider = backend.getUserRecordProvider();
mUserId = getAttribute("userId");
mQuestionId = getAttribute("questionId");
mRequestType = RequestType.ASSESSMENT;
if (mQuestionId != null) {
mRequestType = RequestType.ANSWER;
}
}
/**
* Handle GET Requests.
*/
@Override
protected Representation get() {
try {
String result = null;
switch (mRequestType) {
case ANSWER:
result = mAnswerProvider.get(mUserId, mQuestionId);
break;
case ASSESSMENT:
result = mAnswerProvider.get(mUserId, "summary");
if (result == null || result.length() == 0) {
result = buildAssessment();
}
break;
}
if (result == null) {
setStatus(Status.CLIENT_ERROR_NOT_FOUND);
return null;
}
return new StringRepresentation(result);
} catch (IOException e) {
LOG.error("IOException getting answer: ", e);
setStatus(Status.SERVER_ERROR_INTERNAL);
return null;
}
}
/**
* Handle PUT requests
*/
@Override
protected Representation put(Representation entity) {
boolean success = false;
switch (mRequestType) {
case ANSWER:
try {
mAnswerProvider.put(mUserId, mQuestionId, entity.getText());
mAnswerProvider.put(mUserId, "lastAnswered", mQuestionId);
mAnswerProvider.put(mUserId, "summary", null);
success = true;
} catch (Exception e) {
LOG.warn("Caught exception putting answer: " + e.getMessage(), e);
}
break;
default:
setStatus(Status.CLIENT_ERROR_METHOD_NOT_ALLOWED);
return null;
}
if (success) {
setStatus(Status.SUCCESS_NO_CONTENT);
} else {
setStatus(Status.SERVER_ERROR_INTERNAL);
}
return null;
}
/**
* Clear assessment results.
*/
@Override
protected Representation delete() {
boolean success = false;
switch (mRequestType) {
case ANSWER:
try {
mAnswerProvider.put(mUserId, mQuestionId, null);
mAnswerProvider.put(mUserId, "summary", null);
success = true;
} catch (Exception e) {
LOG.warn("Caught exception putting answer: " + e.getMessage(), e);
}
break;
case ASSESSMENT:
try {
mAnswerProvider.put(mUserId, "summary", null);
mAnswerProvider.put(mUserId, "lastAnswered", null);
// TODO Delete answers
UserRecord record = mUserRecordProvider.get(mUserId);
if (record != null) {
record.setLanding("assessment");
mUserRecordProvider.put(mUserId, record);
}
success = true;
} catch (Exception e) {
LOG.warn("Caught exception putting answer: " + e.getMessage(), e);
}
break;
default:
setStatus(Status.CLIENT_ERROR_METHOD_NOT_ALLOWED);
return null;
}
if (success) {
setStatus(Status.SUCCESS_NO_CONTENT);
} else {
setStatus(Status.SERVER_ERROR_INTERNAL);
}
return null;
}
/**
* This method compiles assessment results.
*/
private String buildAssessment() throws IOException {
StringBuilder sb = new StringBuilder("{ ");
// Last question answered
final String lastAnswered = mAnswerProvider.get(mUserId, "lastAnswered");
if (lastAnswered != null && lastAnswered.length() > 0) {
sb.append("\"lastAnswered\": \"" + lastAnswered + "\", ");
}
// Compute score
Map<String, String> row = mAnswerProvider.query(mUserId);
if (row.size() > 0) {
Score score = new Score();
boolean scoringDone = false;
int totalAnswers = 0;
for (Map.Entry<String, String> c : row.entrySet()) {
if (c.getKey().equals("lastAnswered") || c.getKey().equals("summary")) {
continue;
}
try {
Question question = mQuestionProvider.get(c.getKey());
RecordedAnswer userAnswer = MAPPER.readValue(c.getValue(), RecordedAnswer.class);
if (question == null) {
LOG.warn("Answer for unknown question: " + c.getKey());
continue;
}
LOG.debug("Scoring questionId: " + c.getKey());
scoringDone = !question.scoreAnswer(score, userAnswer);
} catch (Exception e) {
LOG.error("Failed to score question: {userid: \"" + mUserId +
"\", questionid:\"" + c.getKey() +
"\", userAnswer:\"" + c.getValue() + "\"}", e);
}
totalAnswers++;
}
sb.append("\"score\":" + score.getScore());
sb.append(", \"sum\":" + score.getSum());
sb.append(", \"count\":" + score.getCount());
sb.append(", \"totalAnswers\":" + totalAnswers);
sb.append(", \"result\":\"" + score.toString() + "\"");
}
sb.append(" }");
String summary = sb.toString();
// Persist summary
mAnswerProvider.put(mUserId, "summary", summary);
return summary;
}
}
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