done

src/main/java/io/zipcoder/tc_spring_poll_application/controller/ComputeResultController.java

+package io.zipcoder.tc_spring_poll_application.controller;
+
+import io.zipcoder.tc_spring_poll_application.domain.Option;
+import io.zipcoder.tc_spring_poll_application.domain.Vote;
+import io.zipcoder.tc_spring_poll_application.dtos.OptionCount;
+import io.zipcoder.tc_spring_poll_application.dtos.VoteResult;
+import io.zipcoder.tc_spring_poll_application.repositories.VoteRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Collection;
+import java.util.Map;
+import java.util.TreeMap;
+
+@RestController
+public class ComputeResultController {
+
+    private final VoteRepository voteRepository;
+
+    @Autowired
+    public ComputeResultController(VoteRepository voteRepository) {
+        this.voteRepository = voteRepository;
+    }
+
+    @GetMapping("/computeresult")
+    public ResponseEntity<?> computeResult(@RequestParam Long pollId) {
+        VoteResult voteResult = new VoteResult();
+        Iterable<Vote> allVotes = voteRepository.findVotesByPoll(pollId);
+
+        Map<Long, Integer> optionCounts = countOptions(allVotes);
+        addOptionCountsToVoteResult(optionCounts, voteResult);
+
+        return new ResponseEntity<>(voteResult, HttpStatus.OK);
+    }
+
+    private Map<Long, Integer> countOptions(Iterable<Vote> allVotes) {
+        Map<Long, Integer> optionCounts = new TreeMap<>();
+
+        for (Vote vote : allVotes) {
+            if (!optionCounts.containsKey(vote.getOption().getId())) {
+                optionCounts.put(vote.getOption().getId(), 1);
+            } else {
+                optionCounts.put(vote.getOption().getId(), optionCounts.get(vote.getOption().getId()) + 1);
+            }
+        }
+
+        return optionCounts;
+    }
+
+    private void addOptionCountsToVoteResult(Map<Long, Integer> optionCounts, VoteResult voteResult) {
+        for (Long id : optionCounts.keySet()) {
+            OptionCount optionCount = new OptionCount();
+            optionCount.setOptionId(id);
+            optionCount.setCount(optionCounts.get(id));
+            voteResult.getResults().add(optionCount);
+        }
+    }
+
+}

src/main/java/io/zipcoder/tc_spring_poll_application/controller/PollController.java

+package io.zipcoder.tc_spring_poll_application.controller;
+
+import io.zipcoder.tc_spring_poll_application.domain.Poll;
+import io.zipcoder.tc_spring_poll_application.exception.ResourceNotFoundException;
+import io.zipcoder.tc_spring_poll_application.repositories.PollRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Pageable;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
+
+import javax.validation.Valid;
+import java.net.URI;
+
+@RestController
+public class PollController {
+
+    private PollRepository pollRepository;
+
+    @Autowired
+    public PollController(PollRepository pollRepository) {
+        this.pollRepository = pollRepository;
+    }
+
+    @RequestMapping(value = "/polls", method = RequestMethod.GET)
+    public ResponseEntity<Page<Poll>> getAllPolls(Pageable pageable) {
+        Page<Poll> allPolls = pollRepository.findAll(pageable);
+        return new ResponseEntity<>(allPolls, HttpStatus.OK);
+    }
+
+    @RequestMapping(value = "/polls", method = RequestMethod.POST)
+    public ResponseEntity<?> createPoll(@RequestBody @Valid Poll poll) {
+        poll = pollRepository.save(poll);
+        URI newPollUri = ServletUriComponentsBuilder
+                .fromCurrentRequest()
+                .path("/{id}")
+                .buildAndExpand(poll.getId())
+                .toUri();
+        HttpHeaders header = new HttpHeaders();
+        header.setLocation(newPollUri);
+        return new ResponseEntity<>(header, HttpStatus.CREATED);
+    }
+
+    @RequestMapping(value="/polls/{pollId}", method=RequestMethod.GET)
+    public ResponseEntity<?> getPoll(@PathVariable Long pollId) {
+        verifyPoll(pollId);
+        Poll p = pollRepository.findOne(pollId);
+        return new ResponseEntity<> (p, HttpStatus.OK);
+    }
+
+    @RequestMapping(value="/polls/{pollId}", method=RequestMethod.PUT)
+    public ResponseEntity<?> updatePoll(@RequestBody @Valid Poll poll, @PathVariable Long pollId) {
+        // Save the entity
+        verifyPoll(pollId);
+        Poll p = pollRepository.save(poll);
+        return new ResponseEntity<>(p, HttpStatus.OK);
+    }
+
+    @RequestMapping(value="/polls/{pollId}", method=RequestMethod.DELETE)
+    public ResponseEntity<?> deletePoll(@PathVariable Long pollId) {
+        verifyPoll(pollId);
+        pollRepository.delete(pollId);
+        return new ResponseEntity<>(HttpStatus.OK);
+    }
+
+    public void verifyPoll(Long pollId) throws ResourceNotFoundException {
+        if (!pollRepository.exists(pollId)) {
+            throw new ResourceNotFoundException();
+        }
+    }
+}

src/main/java/io/zipcoder/tc_spring_poll_application/controller/VoteController.java

+package io.zipcoder.tc_spring_poll_application.controller;
+
+import io.zipcoder.tc_spring_poll_application.domain.Vote;
+import io.zipcoder.tc_spring_poll_application.repositories.VoteRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpRequest;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
+
+import java.net.URI;
+
+@RestController
+public class VoteController {
+
+    private VoteRepository voteRepository;
+
+    @Autowired
+    public VoteController(VoteRepository voteRepository) {
+        this.voteRepository = voteRepository;
+    }
+
+    @RequestMapping(value = "/polls/{pollId}/votes", method = RequestMethod.POST)
+    public ResponseEntity<?> createVote(@PathVariable Long pollId, @RequestBody Vote
+            vote) {
+        vote = voteRepository.save(vote);
+        // Set the headers for the newly created resource
+        HttpHeaders responseHeaders = new HttpHeaders();
+        responseHeaders.setLocation(ServletUriComponentsBuilder.
+                fromCurrentRequest().path("/{id}").buildAndExpand(vote.getId()).toUri());
+        return new ResponseEntity<>(vote, responseHeaders, HttpStatus.CREATED);
+    }
+
+    @RequestMapping(value="/polls/votes", method=RequestMethod.GET)
+    public Iterable<Vote> getAllVotes() {
+        return voteRepository.findAll();
+    }
+
+    @RequestMapping(value="/polls/{pollId}/votes", method=RequestMethod.GET)
+    public Iterable<Vote> getVote(@PathVariable Long pollId) {
+        return voteRepository.findVotesByPoll(pollId);
+    }
+}

src/main/java/io/zipcoder/tc_spring_poll_application/domain/Option.java

+package io.zipcoder.tc_spring_poll_application.domain;
+
+import javax.persistence.*;
+
+@Entity
+public class Option {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "OPTION_ID")
+    private Long id;
+
+    @Column(name = "OPTION_VALUE")
+    private String value;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+}

src/main/java/io/zipcoder/tc_spring_poll_application/domain/Poll.java

+package io.zipcoder.tc_spring_poll_application.domain;
+
+import org.hibernate.validator.constraints.NotEmpty;
+
+import javax.persistence.*;
+import javax.validation.constraints.Size;
+import java.util.Set;
+
+@Entity
+public class Poll {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "POLL_ID")
+    private Long id;
+
+    @Column(name = "QUESTION")
+    @NotEmpty
+    private String question;
+
+    @OneToMany(cascade = CascadeType.ALL)
+    @JoinColumn(name = "POLL_ID")
+    @OrderBy
+    @Size(min=2, max=6)
+    private Set<Option> options;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getQuestion() {
+        return question;
+    }
+
+    public void setQuestion(String question) {
+        this.question = question;
+    }
+
+    public Set<Option> getOptions() {
+        return options;
+    }
+
+    public void setOptions(Set<Option> options) {
+        this.options = options;
+    }
+}

src/main/java/io/zipcoder/tc_spring_poll_application/domain/Vote.java

+package io.zipcoder.tc_spring_poll_application.domain;
+
+import javax.persistence.*;
+
+@Entity
+public class Vote {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "VOTE_ID")
+    private Long id;
+
+    @ManyToOne
+    @JoinColumn(name = "OPTION_ID")
+    private Option option;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public Option getOption() {
+        return option;
+    }
+
+    public void setOption(Option option) {
+        this.option = option;
+    }
+}

src/main/java/io/zipcoder/tc_spring_poll_application/dtos/OptionCount.java

+package io.zipcoder.tc_spring_poll_application.dtos;
+
+public class OptionCount {
+
+    private Long optionId;
+    private int count;
+
+    public Long getOptionId() {
+        return optionId;
+    }
+
+    public void setOptionId(Long optionId) {
+        this.optionId = optionId;
+    }
+
+    public int getCount() {
+        return count;
+    }
+
+    public void setCount(int count) {
+        this.count = count;
+    }
+}

src/main/java/io/zipcoder/tc_spring_poll_application/dtos/VoteResult.java

+package io.zipcoder.tc_spring_poll_application.dtos;
+
+import java.util.Collection;
+
+public class VoteResult {
+
+    private int totalVotes;
+    private Collection<OptionCount> results;
+
+    public int getTotalVotes() {
+        return totalVotes;
+    }
+
+    public void setTotalVotes(int totalVotes) {
+        this.totalVotes = totalVotes;
+    }
+
+    public Collection<OptionCount> getResults() {
+        return results;
+    }
+
+    public void setResults(Collection<OptionCount> results) {
+        this.results = results;
+    }
+}
+
+
+

src/main/java/io/zipcoder/tc_spring_poll_application/error/ErrorDetail.java

+package io.zipcoder.tc_spring_poll_application.error;
+
+import java.util.List;
+import java.util.Map;
+
+public class ErrorDetail {
+
+    private String title;
+    private int status;
+    private String detail;
+    private long timeStamp;
+    private String developerMessage;
+    private Map<String, List<ValidationError>> errors;
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public int getStatus() {
+        return status;
+    }
+
+    public void setStatus(int status) {
+        this.status = status;
+    }
+
+    public String getDetail() {
+        return detail;
+    }
+
+    public void setDetail(String detail) {
+        this.detail = detail;
+    }
+
+    public long getTimeStamp() {
+        return timeStamp;
+    }
+
+    public void setTimeStamp(long timeStamp) {
+        this.timeStamp = timeStamp;
+    }
+
+    public String getDeveloperMessage() {
+        return developerMessage;
+    }
+
+    public void setDeveloperMessage(String developerMessage) {
+        this.developerMessage = developerMessage;
+    }
+
+    public Map<String, List<ValidationError>> getErrors() {
+        return errors;
+    }
+
+    public void setErrors(Map<String, List<ValidationError>> errors) {
+        this.errors = errors;
+    }
+}

src/main/java/io/zipcoder/tc_spring_poll_application/error/ValidationError.java

+package io.zipcoder.tc_spring_poll_application.error;
+
+public class ValidationError {
+
+    private String code;
+    private String message;
+
+    public String getCode() {
+        return code;
+    }
+
+    public void setCode(String code) {
+        this.code = code;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+}

src/main/java/io/zipcoder/tc_spring_poll_application/exception/ResourceNotFoundException.java

+package io.zipcoder.tc_spring_poll_application.exception;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.NOT_FOUND)
+public class ResourceNotFoundException extends RuntimeException {
+
+    public ResourceNotFoundException(){}
+
+    public ResourceNotFoundException(String message) {
+        super(message);
+    }
+
+    public ResourceNotFoundException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+}

src/main/java/io/zipcoder/tc_spring_poll_application/exception/RestExceptionHandler.java

+package io.zipcoder.tc_spring_poll_application.exception;
+
+import io.zipcoder.tc_spring_poll_application.error.ErrorDetail;
+import io.zipcoder.tc_spring_poll_application.error.ValidationError;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.MessageSource;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.FieldError;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+
+import javax.servlet.http.HttpServletRequest;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.Map;
+
+@ControllerAdvice
+public class RestExceptionHandler {
+
+    private final MessageSource messageSource;
+
+    @Autowired
+    public RestExceptionHandler(MessageSource messageSource) {
+        this.messageSource = messageSource;
+    }
+
+    @ExceptionHandler(ResourceNotFoundException.class)
+    public ResponseEntity<?> handleResourceNotFoundException(ResourceNotFoundException rnfe, HttpServletRequest request) {
+        ErrorDetail errorDetail = new ErrorDetail();
+        errorDetail.setTitle(request.getMethod());
+        errorDetail.setStatus(404);
+        errorDetail.setDetail(rnfe.getCause().toString());
+        errorDetail.setTimeStamp(new Date().getTime());
+        errorDetail.setDeveloperMessage(rnfe.getMessage());
+        return new ResponseEntity<>(errorDetail, HttpStatus.NOT_FOUND);
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<?>
+    handleValidationError(MethodArgumentNotValidException manve, HttpServletRequest request) {
+        ErrorDetail errorDetail = new ErrorDetail();
+        Map<String, List<ValidationError>> errors = errorDetail.getErrors();
+
+        List<FieldError> fieldErrors =  manve.getBindingResult().getFieldErrors();
+        for(FieldError fe : fieldErrors) {
+            List<ValidationError> validationErrorList = errorDetail.getErrors().get(fe.getField());
+            if (validationErrorList == null) {
+                validationErrorList = new ArrayList<>();
+                errorDetail.getErrors().put(fe.getField(), validationErrorList);
+            }
+            ValidationError validationError = new ValidationError();
+            validationError.setCode(fe.getCode());
+            validationError.setMessage(messageSource.getMessage(fe, null));
+            validationErrorList.add(validationError);
+        }
+
+        return new ResponseEntity<>(errorDetail, HttpStatus.BAD_REQUEST);
+    }
+
+}

src/main/java/io/zipcoder/tc_spring_poll_application/repositories/OptionRepository.java

+package io.zipcoder.tc_spring_poll_application.repositories;
+
+import io.zipcoder.tc_spring_poll_application.domain.Option;
+import org.springframework.data.repository.CrudRepository;
+
+public interface OptionRepository extends CrudRepository<Option, Long> {
+}

src/main/java/io/zipcoder/tc_spring_poll_application/repositories/PollRepository.java

+package io.zipcoder.tc_spring_poll_application.repositories;
+
+import io.zipcoder.tc_spring_poll_application.domain.Poll;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.repository.PagingAndSortingRepository;
+
+public interface PollRepository extends PagingAndSortingRepository<Poll, Long> {
+}

src/main/java/io/zipcoder/tc_spring_poll_application/repositories/VoteRepository.java

+package io.zipcoder.tc_spring_poll_application.repositories;
+
+import io.zipcoder.tc_spring_poll_application.domain.Vote;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.CrudRepository;
+
+public interface VoteRepository extends CrudRepository<Vote, Long> {
+    @Query(value = "SELECT v.* " +
+            "FROM Option o, Vote v " +
+            "WHERE o.POLL_ID = ?1 " +
+            "AND v.OPTION_ID = o.OPTION_ID", nativeQuery = true)
+
+    Iterable<Vote> findVotesByPoll(Long pollId);
+
+}

src/main/resources/import.sql

+insert into poll (poll_id, question) values (1, 'What is your favorite primary color?');
+
+insert into option (option_value, poll_id) values ('Red', 1);
+insert into option (option_value, poll_id) values ('Blue', 1);
+insert into option (option_value, poll_id) values ('Yellow', 1);
+
+insert into poll (poll_id,  question) values (2, 'What is your favorite original Netflix series?');
+
+insert into option (option_value, poll_id) values ('Black Mirror', 2);
+insert into option (option_value, poll_id) values ('Voltron', 2);
+insert into option (option_value, poll_id) values ('Unbreakable Kimmy Schmidt', 2);
+
+insert into poll (poll_id,  question) values (3, 'What is your favorite candy?');
+
+insert into option (option_value, poll_id) values ('M&M''s', 3);
+insert into option (option_value, poll_id) values ('Skittles', 3);
+insert into option (option_value, poll_id) values ('Werther''s Originals', 3);
+
+insert into poll (poll_id,  question) values (4, 'What''s your favorite Gen 1 starter Pokemon?');
+
+insert into option (option_value, poll_id) values ('Bulbasaur', 4);
+insert into option (option_value, poll_id) values ('Squirtle', 4);
+insert into option (option_value, poll_id) values ('Charmander', 4);
+
+insert into poll (poll_id,  question) values (5, 'What''s your favorite Gen 2 starter Pokemon?');
+
+insert into option (option_value, poll_id) values ('Chikorita', 5);
+insert into option (option_value, poll_id) values ('Totodile', 5);
+insert into option (option_value, poll_id) values ('Cyndaquil', 5);
+
+insert into poll (poll_id,  question) values (6, 'What''s your favorite Gen 3 starter Pokemon?');
+
+insert into option (option_value, poll_id) values ('Treecko', 6);
+insert into option (option_value, poll_id) values ('Mudkip', 6);
+insert into option (option_value, poll_id) values ('Torchic', 6);
+
+insert into poll (poll_id,  question) values (7, 'What''s your favorite Gen 4 starter Pokemon?');
+
+insert into option (option_value, poll_id) values ('Turtwig', 7);
+insert into option (option_value, poll_id) values ('Piplup', 7);
+insert into option (option_value, poll_id) values ('Chimchar', 7);
+
+insert into poll (poll_id,  question) values (8, 'What''s your favorite Gen 5 starter Pokemon?');
+
+insert into option (option_value, poll_id) values ('Snivy', 8);
+insert into option (option_value, poll_id) values ('Oshawott', 8);
+insert into option (option_value, poll_id) values ('Tepig', 8);
+
+insert into poll (poll_id,  question) values (9, 'What''s your favorite Gen 6 starter Pokemon?');
+
+insert into option (option_value, poll_id) values ('Chespin', 9);
+insert into option (option_value, poll_id) values ('Froakie', 9);
+insert into option (option_value, poll_id) values ('Fennekin', 9);
+
+insert into poll (poll_id,  question) values (10, 'What''s your favorite Gen 7 starter Pokemon?');
+
+insert into option (option_value, poll_id) values ('Rowlet', 10);
+insert into option (option_value, poll_id) values ('Popplio', 10);
+insert into option (option_value, poll_id) values ('Litten', 10);
+
+insert into poll (poll_id,  question) values (11, 'What''s your favorite Let''s Go starter Pokemon?');
+
+insert into option (option_value, poll_id) values ('Pikachu', 11);
+insert into option (option_value, poll_id) values ('Eevee', 11);
+insert into option (option_value, poll_id) values ('Both', 11);
+
+insert into poll (poll_id,  question) values (12, 'Who is your favorite Belcher child?');
+
+insert into option (option_value, poll_id) values ('Tina', 12);
+insert into option (option_value, poll_id) values ('Gene', 12);
+insert into option (option_value, poll_id) values ('Louise', 12);
+
+insert into poll (poll_id,  question) values (13, 'What''s your favorite secondary color?');
+
+insert into option (option_value, poll_id) values ('Orange', 13);
+insert into option (option_value, poll_id) values ('Purple', 13);
+insert into option (option_value, poll_id) values ('Green', 13);
+
+insert into poll (poll_id,  question) values (14, 'What''s your favorite fruit?');
+
+insert into option (option_value, poll_id) values ('Apples', 14);
+insert into option (option_value, poll_id) values ('Bananas', 14);
+insert into option (option_value, poll_id) values ('Oranges', 14);
+
+insert into poll (poll_id,  question) values (15, 'What''s your favorite animal?');
+
+insert into option (option_value, poll_id) values ('Dog', 15);
+insert into option (option_value, poll_id) values ('Cat', 15);
+insert into option (option_value, poll_id) values ('Axolotl', 15);

src/main/resources/messages.properties

+NotEmpty.poll.question=Question is a required field
+Size.poll.options=Options must be greater than {2} and less than {1}