472 lines
15 KiB
Java
472 lines
15 KiB
Java
/**
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*
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*/
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package de.bstly.board.businesslogic;
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import java.math.BigInteger;
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import java.time.Instant;
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import java.util.List;
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import javax.persistence.EntityManager;
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import javax.persistence.Query;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.data.domain.Page;
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import org.springframework.data.domain.PageImpl;
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import org.springframework.data.domain.PageRequest;
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import org.springframework.data.domain.Sort;
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import org.springframework.data.domain.Sort.Order;
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import org.springframework.stereotype.Component;
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import com.google.common.collect.Lists;
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import com.querydsl.core.types.OrderSpecifier;
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import com.querydsl.jpa.impl.JPAQuery;
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import com.querydsl.jpa.impl.JPAQueryFactory;
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import de.bstly.board.model.Bookmarks;
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import de.bstly.board.model.Entry;
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import de.bstly.board.model.FlaggedStatus;
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import de.bstly.board.model.QEntry;
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import de.bstly.board.model.QFlag;
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import de.bstly.board.model.QVote;
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import de.bstly.board.model.Types;
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import de.bstly.board.model.VoteType;
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import de.bstly.board.repository.EntryRepository;
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import de.bstly.board.repository.VoteRepository;
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/**
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* The Class EntryManager.
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*/
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@Component
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public class EntryManager {
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@Autowired
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private EntryRepository entryRepository;
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@Autowired
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private CommentManager commentManager;
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@Autowired
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private VoteManager voteManager;
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@Autowired
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private VoteRepository voteRepository;
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@Autowired
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private BookmarksManager bookmarksManager;
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@Autowired
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private SettingsManager settingsManager;
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@Autowired
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private FlagManager flagManager;
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@Autowired
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private JPAQueryFactory jpaQueryFactory;
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@Autowired
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private EntityManager em;
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private QEntry qEntry = QEntry.entry;
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private QVote qVote = QVote.vote;
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private QFlag qFlag = QFlag.flag;
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static final String UPVOTES_QUERY = "SELECT upvote.target,COUNT(upvote.id) AS count FROM votes as upvote WHERE upvote.type = 0 AND upvote.target_type = 1 GROUP BY upvote.target";
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static final String DOWNVOTES_QUERY = "SELECT downvote.target,COUNT(downvote.id) AS count FROM votes as downvote WHERE downvote.type = 1 AND downvote.target_type = 1 GROUP BY downvote.target";
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static final String COMMENTS_QUERY = "SELECT comment.target,MAX(comment.created) as last,COUNT(comment.id) AS count FROM comments as comment WHERE comment.flagged_status = :flag GROUP BY comment.target";
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static final String RANK_CALCULATION_QUERY = "SELECT entry.*, (IFNULL(upvote.count,0) - IFNULL(downvote.count,0)) as points, (IFNULL(upvote.count,0) - IFNULL(downvote.count,0)) / IF(:gravity > 0, POW(TIMESTAMPDIFF(HOUR, entry.created, :before)+2,:gravity), 1) AS ranking FROM entries AS entry LEFT JOIN ("
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+ UPVOTES_QUERY
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+ ") AS upvote ON upvote.target = entry.id LEFT JOIN ("
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+ DOWNVOTES_QUERY
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+ ") AS downvote ON downvote.target = entry.id WHERE %s ORDER BY ranking DESC, entry.created DESC";
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static final String DATE_QUERY = "SELECT entry.*FROM entries AS entry WHERE %s ORDER BY entry.created DESC";
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static final String COMMENT_CALCULATION_QUERY = "SELECT entry.*, IFNULL(comment.count,0) as comments, IFNULL(comment.count,0) / IF(:gravity > 0, POW(TIMESTAMPDIFF(HOUR, comment.last, :before)+2,:gravity), 1) AS ranking FROM entries AS entry LEFT JOIN ("
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+ COMMENTS_QUERY
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+ ") AS comment ON comment.target = entry.id WHERE %s ORDER BY ranking DESC, entry.created DESC";
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static final String LAST_COMMENT_QUERY = "SELECT entry.* FROM entries AS entry LEFT JOIN ("
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+ COMMENTS_QUERY
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+ ") AS comment ON comment.target = entry.id WHERE %s ORDER BY comment.last DESC, entry.created DESC";
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static final String COUNT_QUERY = "SELECT count(entry.id) FROM entries as entry WHERE %s";
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/**
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* Fetch by ranking.
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*
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* @param username the username
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* @param date the date
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* @param flaggedStatus the flagged status
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* @param gravity the gravity
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* @param page the page
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* @param size the size
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* @return the page
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*/
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public Page<Entry> fetchByRanking(String username, Instant date, FlaggedStatus flaggedStatus,
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double gravity, int page, int size) {
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Query query = createEntryQuery(RANK_CALCULATION_QUERY, username, date, flaggedStatus);
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query.setParameter("gravity", gravity);
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query.setFirstResult((page) * size);
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query.setMaxResults(size);
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@SuppressWarnings("unchecked")
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List<Entry> list = query.getResultList();
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Query queryTotal = createCountQuery(COUNT_QUERY, username, date, flaggedStatus);
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long countResult = ((BigInteger) queryTotal.getSingleResult()).longValue();
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return new PageImpl<Entry>(list, PageRequest.of(page, size), countResult);
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}
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/**
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* Fetch by date.
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*
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* @param username the username
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* @param date the date
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* @param flaggedStatus the flagged status
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* @param page the page
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* @param size the size
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* @return the page
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*/
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public Page<Entry> fetchByDate(String username, Instant date, FlaggedStatus flaggedStatus,
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int page, int size) {
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Query query = createEntryQuery(DATE_QUERY, username, date, flaggedStatus);
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query.setFirstResult((page) * size);
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query.setMaxResults(size);
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@SuppressWarnings("unchecked")
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List<Entry> list = query.getResultList();
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Query queryTotal = createCountQuery(COUNT_QUERY, username, date, flaggedStatus);
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long countResult = ((BigInteger) queryTotal.getSingleResult()).longValue();
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return new PageImpl<Entry>(list, PageRequest.of(page, size), countResult);
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}
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/**
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* Fetch by comments.
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*
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* @param username the username
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* @param date the date
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* @param flaggedStatus the flagged status
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* @param gravity the gravity
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* @param page the page
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* @param size the size
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* @return the page
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*/
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public Page<Entry> fetchByComments(String username, Instant date, FlaggedStatus flaggedStatus,
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double gravity, int page, int size) {
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Query query = createEntryQuery(COMMENT_CALCULATION_QUERY, username, date, flaggedStatus);
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query.setParameter("gravity", gravity);
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query.setFirstResult((page) * size);
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query.setMaxResults(size);
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@SuppressWarnings("unchecked")
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List<Entry> list = query.getResultList();
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Query queryTotal = createCountQuery(COUNT_QUERY, username, date, flaggedStatus);
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long countResult = ((BigInteger) queryTotal.getSingleResult()).longValue();
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return new PageImpl<Entry>(list, PageRequest.of(page, size), countResult);
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}
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/**
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* Fetch by last comment.
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*
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* @param username the username
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* @param date the date
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* @param flaggedStatus the flagged status
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* @param page the page
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* @param size the size
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* @return the page
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*/
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public Page<Entry> fetchByLastComment(String username, Instant date,
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FlaggedStatus flaggedStatus, int page, int size) {
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Query query = createEntryQuery(LAST_COMMENT_QUERY, username, date, flaggedStatus);
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query.setFirstResult((page) * size);
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query.setMaxResults(size);
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@SuppressWarnings("unchecked")
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List<Entry> list = query.getResultList();
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Query queryTotal = createCountQuery(COUNT_QUERY, username, date, flaggedStatus);
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long countResult = ((BigInteger) queryTotal.getSingleResult()).longValue();
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return new PageImpl<Entry>(list, PageRequest.of(page, size), countResult);
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}
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/**
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* Creates the entry query.
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*
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* @param rawQuery the raw query
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* @param username the username
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* @param date the date
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* @param flaggedStatus the flagged status
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* @return the query
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*/
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protected Query createEntryQuery(String rawQuery, String username, Instant date,
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FlaggedStatus flaggedStatus) {
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String filterString = "";
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boolean author = false;
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if (date != null) {
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filterString = "entry.created < :before";
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} else {
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date = Instant.now();
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author = true;
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filterString = "(entry.created < :before OR entry.author = :author)";
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}
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filterString += " AND entry.flagged_status = :flag";
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Query query = em.createNativeQuery(String.format(rawQuery, filterString), Entry.class);
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query.setParameter("before", date);
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if (author) {
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query.setParameter("author", username);
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}
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query.setParameter("flag", flaggedStatus.toString());
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return query;
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}
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/**
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* Creates the count query.
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*
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* @param rawQuery the raw query
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* @param username the username
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* @param date the date
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* @param flaggedStatus the flagged status
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* @return the query
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*/
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protected Query createCountQuery(String rawQuery, String username, Instant date,
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FlaggedStatus flaggedStatus) {
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String filterString = "";
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boolean author = false;
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if (date != null) {
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filterString = "entry.created < :before";
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} else {
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date = Instant.now();
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author = true;
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filterString = "(entry.created < :before OR entry.author = :author)";
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}
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filterString += " AND entry.flagged_status = :flag";
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Query query = em.createNativeQuery(String.format(rawQuery, filterString));
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query.setParameter("before", date);
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if (author) {
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query.setParameter("author", username);
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}
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query.setParameter("flag", flaggedStatus.toString());
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return query;
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}
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/**
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* Fetch flagged.
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*
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* @param page the page
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* @param size the size
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* @param asc the asc
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* @return the page
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*/
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public Page<Entry> fetchFlagged(int page, int size, boolean asc) {
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Sort sort = Sort.by(asc ? Order.asc("created") : Order.desc("created"));
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JPAQuery<Entry> query = jpaQueryFactory.selectFrom(qEntry).leftJoin(qFlag)
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.on(qEntry.id.eq(qFlag.target)).where(qFlag.targetType.eq(Types.entry))
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.groupBy(qFlag.target);
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return new PageImpl<Entry>(query
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.orderBy(new OrderSpecifier<>(asc ? com.querydsl.core.types.Order.ASC
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: com.querydsl.core.types.Order.DESC, qEntry.created))
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.limit(size).offset(page * size).fetch(), PageRequest.of(page, size, sort),
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query.fetchCount());
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}
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/**
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* Fetch by user.
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*
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* @param username the username
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* @param date the date
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* @param page the page
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* @param size the size
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* @param asc the asc
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* @return the page
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*/
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public Page<Entry> fetchByUser(String username, Instant date, int page, int size, boolean asc) {
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Sort sort = Sort.by(asc ? Order.asc("created") : Order.desc("created"));
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return entryRepository.findAll(
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qEntry.author.equalsIgnoreCase(username).and(qEntry.created.before(date)),
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PageRequest.of(page, size, sort));
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}
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/**
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* Fetch by bookmarks.
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*
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* @param username the username
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* @param page the page
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* @param size the size
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* @return the page
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*/
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public Page<Entry> fetchByBookmarks(String username, int page, int size) {
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Bookmarks bookmarks = bookmarksManager.get(username);
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if (bookmarks.getEntries() == null) {
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bookmarks.setEntries(Lists.newArrayList());
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}
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return entryRepository.findAll(qEntry.id.in(bookmarks.getEntries()),
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PageRequest.of(page, size, Sort.by(Order.desc("created"))));
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}
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/**
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* Apply metadata.
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*
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* @param username the username
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* @param karma the karma
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* @param entry the entry
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* @param ignore the ignore
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*/
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public void applyMetadata(String username, long karma, Entry entry, List<String> ignore) {
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ignore.addAll(entry.getMetadata().keySet());
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if (!ignore.contains("comments")) {
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entry.getMetadata().put("comments", commentManager.count(entry.getId()));
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}
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if (!ignore.contains("points")) {
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entry.getMetadata().put("points", voteManager.getPoints(entry.getId(), Types.entry));
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}
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if (!ignore.contains("bookmark")) {
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entry.getMetadata().put("bookmark",
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!bookmarksManager.hasEntry(username, entry.getId()));
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}
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if (!ignore.contains("removeBookmark")) {
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entry.getMetadata().put("removeBookmark",
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bookmarksManager.hasEntry(username, entry.getId()));
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}
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if (!ignore.contains("upvoted")) {
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entry.getMetadata().put("upvoted",
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voteRepository.exists(qVote.target.eq(entry.getId())
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.and(qVote.targetType.eq(Types.entry)).and(qVote.type.eq(VoteType.up))
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.and(qVote.author.equalsIgnoreCase(username))));
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}
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if (!ignore.contains("downvoted")) {
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entry.getMetadata().put("downvoted",
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voteRepository.exists(qVote.target.eq(entry.getId())
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.and(qVote.targetType.eq(Types.entry)).and(qVote.type.eq(VoteType.down))
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.and(qVote.author.equalsIgnoreCase(username))));
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}
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if (!username.equals(entry.getAuthor()) && !ignore.contains("flag")) {
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entry.getMetadata().put("flag",
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flagManager.get(username, entry.getId(), Types.entry) == null);
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}
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if (!username.equals(entry.getAuthor()) && !ignore.contains("unflag")) {
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entry.getMetadata().put("unflag",
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flagManager.get(username, entry.getId(), Types.entry) != null);
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}
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if (!ignore.contains("flagged")) {
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entry.getMetadata().put("flagged",
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flagManager.getFlags(entry.getId(), Types.entry) > 0);
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}
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if (voteRepository
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.exists(qVote.target.eq(entry.getId()).and(qVote.targetType.eq(Types.entry))
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.and(qVote.author.equalsIgnoreCase(username)))) {
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if (!ignore.contains("unvote")) {
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entry.getMetadata().put("unvote", true);
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}
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} else {
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if (!ignore.contains("vote")) {
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entry.getMetadata().put("vote", true);
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}
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if (!ignore.contains("downvote") && karma >= settingsManager.getUnvoteThresh()) {
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entry.getMetadata().put("downvote", true);
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}
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}
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}
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/**
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* Apply metadata.
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*
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* @param username the username
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* @param karma the karma
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* @param entries the entries
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* @param ignore the ignore
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*/
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public void applyMetadata(String username, long karma, List<Entry> entries,
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List<String> ignore) {
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for (Entry entry : entries) {
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applyMetadata(username, karma, entry, ignore);
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}
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}
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/**
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* Exists.
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*
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* @param id the id
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* @return true, if successful
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*/
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public boolean exists(Long id) {
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return entryRepository.existsById(id);
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}
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/**
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* Gets the.
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*
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* @param id the id
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* @return the entry
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*/
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public Entry get(Long id) {
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return entryRepository.findById(id).orElse(null);
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}
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/**
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* Save.
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*
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* @param entry the entry
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* @return the entry
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*/
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public Entry save(Entry entry) {
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return entryRepository.save(entry);
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}
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/**
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* Delete.
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*
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* @param entry the entry
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*/
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public void delete(Entry entry) {
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commentManager.deleteByTarget(entry.getId());
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voteManager.deleteByTarget(entry.getId(), Types.entry);
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bookmarksManager.removeEntry(entry.getId());
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flagManager.deleteByTarget(entry.getId(), Types.entry);
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entryRepository.delete(entry);
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}
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/**
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* Gets the points.
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*
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* @param entryId the entry id
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* @return the points
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*/
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public long getPoints(Long entryId) {
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long upvotes = voteRepository.count(qVote.targetType.eq(Types.entry)
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.and(qVote.type.eq(VoteType.up)).and(qVote.target.eq(entryId)));
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long downvotes = voteRepository.count(qVote.targetType.eq(Types.entry)
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.and(qVote.type.eq(VoteType.down)).and(qVote.target.eq(entryId)));
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return upvotes - downvotes;
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}
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/**
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* Gets the user points.
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*
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* @param entryId the entry id
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* @param username the username
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* @return the user points
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*/
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public long getUserPoints(Long entryId, String username) {
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long upvotes = voteRepository.count(qVote.targetType.eq(Types.entry)
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.and(qVote.type.eq(VoteType.up).and(qVote.author.notEqualsIgnoreCase(username)))
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.and(qVote.target.eq(entryId)));
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long downvotes = voteRepository.count(qVote.targetType.eq(Types.entry)
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.and(qVote.type.eq(VoteType.down).and(qVote.author.notEqualsIgnoreCase(username)))
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.and(qVote.target.eq(entryId)));
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return upvotes - downvotes;
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}
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}
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