+/*
+ * Copyright (C) 2016 Roland Häder
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.mxchange.addressbook.model.addressbook.share;
+
+import java.text.MessageFormat;
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Objects;
+import javax.ejb.Stateless;
+import javax.persistence.NoResultException;
+import javax.persistence.Query;
+import org.mxchange.addressbook.model.shared.AddressbookShareSessionBeanRemote;
+import org.mxchange.jaddressbook.model.addressbook.Addressbook;
+import org.mxchange.jaddressbookshare.exceptions.UserAlreadySharingAddressbookException;
+import org.mxchange.jaddressbookshare.model.addressbook.shared.AddressbookShare;
+import org.mxchange.jaddressbookshare.model.addressbook.shared.ShareableAddressbook;
+import org.mxchange.jcoreee.database.BaseDatabaseBean;
+import org.mxchange.jusercore.model.user.User;
+
+/**
+ * A stateless bean for handling address book sharing
+ * <p>
+ * @author Roland Häder<roland@mxchange.org>
+ */
+@Stateless (name = "share", description = "A stateless bean for handling shared addressbooks")
+public class SharedAddressbooksSessionBean extends BaseDatabaseBean implements AddressbookShareSessionBeanRemote {
+
+ /**
+ * Serial number
+ */
+ private static final long serialVersionUID = 136_984_697_285_694_710L;
+
+ @Override
+ @SuppressWarnings ("unchecked")
+ public List<ShareableAddressbook> allSharedAddressbooks (final User user) {
+ // Trace message
+ this.getLoggerBeanLocal().logTrace(MessageFormat.format("allSharedAddressbooks: user={0} - CALLED!", user)); //NOI18N
+
+ // Is user null?
+ if (null == user) {
+ // Throw NPE
+ throw new NullPointerException("user is null"); //NOI18N
+ } else if (user.getUserId() == null) {
+ // Null userId is not allowed
+ throw new NullPointerException("user.userId is null"); //NOI18N
+ } else if (user.getUserId() < 1) {
+ // Not allowed value
+ throw new IllegalArgumentException(MessageFormat.format("user.UserId={0} is an invalid value", user.getUserId())); //NOI18N
+ }
+
+ // Get named query
+ Query query = this.getEntityManager().createNamedQuery("SearchUserSharedAddressbooks", List.class); //NOI18N
+
+ // Set parameter
+ query.setParameter("user", user); //NOI18N
+
+ // Return full list
+ List<ShareableAddressbook> list = query.getResultList();
+
+ // Trace message
+ this.getLoggerBeanLocal().logTrace(MessageFormat.format("allSharedAddressbooks: list.size()={0} - EXIT!", list.size()));
+
+ // Return list
+ return list;
+ }
+
+ @Override
+ @SuppressWarnings ("unchecked")
+ public List<User> allUsersNotSharing (final User user, final Addressbook addressbook) {
+ // Trace message
+ this.getLoggerBeanLocal().logTrace(MessageFormat.format("allUsersNotSharing: user={0},addressbook={1} - CALLED!", user, addressbook)); //NOI18N
+
+ // Test parameter
+ if (null == user) {
+ // Throw NPE
+ throw new NullPointerException("user is null"); //NOI18N
+ } else if (user.getUserId() == null) {
+ // Throw NPE again
+ throw new NullPointerException("user.userId is null"); //NOI18N
+ } else if (user.getUserId() < 1) {
+ // Invalid id
+ throw new IllegalArgumentException(MessageFormat.format("user.userId={0} is invalid", user.getUserId())); //NOI18N
+ } else if (null == addressbook) {
+ // Again NPE
+ throw new NullPointerException("addressbook is null"); //NOI18N
+ } else if (addressbook.getAddressbookId() == null) {
+ // Again NPE
+ throw new NullPointerException("addressbook.addressbookId is null"); //NOI18N
+ } else if (addressbook.getAddressbookId() < 1) {
+ // Invalid id
+ throw new IllegalArgumentException(MessageFormat.format("addressbook.getAddressbookId={0} is invalid", addressbook.getAddressbookId())); //NOI18N
+ }
+
+ // Get named query for a user list without given user
+ Query allUsersExceptQuery = this.getEntityManager().createNamedQuery("SearchAllUsersExcept", List.class); //NOI18N
+
+ // Set parameter
+ allUsersExceptQuery.setParameter("user", user); //NOI18N
+
+ // Get full list
+ List<User> allUsersExcept = allUsersExceptQuery.getResultList();
+
+ // Debug message
+ this.getLoggerBeanLocal().logDebug(MessageFormat.format("allUsersNotSharing: allUsersExcept.size()={0}", allUsersExcept.size())); //NOI18N
+
+ // Now get all shares this user has created
+ Query allSharesQuery = this.getEntityManager().createNamedQuery("SearchUserSharedAddressbooks", List.class); //NOI18N
+
+ // Set parameter
+ allSharesQuery.setParameter("user", user); //NOI18N
+
+ // Get full list again
+ List<ShareableAddressbook> allShares = allSharesQuery.getResultList();
+
+ // Debug message
+ this.getLoggerBeanLocal().logDebug(MessageFormat.format("allUsersNotSharing: allShares.size()={0}", allShares.size())); //NOI18N
+
+ // List for users aharing with given
+ List<User> sharingUsers = new ArrayList<>(allShares.size());
+
+ // Check all entries
+ for (final ShareableAddressbook share : allShares) {
+ // Debug message
+ this.getLoggerBeanLocal().logDebug(MessageFormat.format("allUsersNotSharing: share.shareUserSharee={0}", share.getShareUserSharee())); //NOI18N
+
+ // Add it
+ sharingUsers.add(share.getShareUserSharee());
+ }
+
+ // Debug message
+ this.getLoggerBeanLocal().logDebug(MessageFormat.format("allUsersNotSharing: sharingUsers.size()={0}", sharingUsers.size())); //NOI18N
+
+ // Init final user list
+ List<User> userList = new LinkedList<>();
+
+ // Walk through all users
+ for (final User foundUser : allUsersExcept) {
+ // Debug message
+ this.getLoggerBeanLocal().logDebug(MessageFormat.format("allUsersNotSharing: foundUser={0}", foundUser)); //NOI18N
+
+ // Does the list contain it ?
+ if (!sharingUsers.contains(foundUser)) {
+ // Found one to add
+ this.getLoggerBeanLocal().logDebug(MessageFormat.format("allUsersNotSharing: foundUser={0} - ADDING!", foundUser)); //NOI18N
+
+ // Add it
+ userList.add(foundUser);
+ }
+ }
+
+ // Trace message
+ this.getLoggerBeanLocal().logTrace(MessageFormat.format("allUsersNotSharing: userList.size()={0} - EXIT!", userList.size())); //NOI18N
+
+ // Return it
+ return userList;
+ }
+
+ @Override
+ @SuppressWarnings ("unchecked")
+ public Integer countAllUserSharedAddressbooks (final User user) {
+ // Trace message
+ this.getLoggerBeanLocal().logTrace(MessageFormat.format("countAllUserSharedAddressbooks: user={0} - CALLED!", user)); //NOI18N
+
+ // user should be valid
+ if (null == user) {
+ // Throw NPE
+ throw new NullPointerException("user is null"); //NOI18N
+ } else if (user.getUserId() == null) {
+ // Throw NPE again
+ throw new NullPointerException("user.userId is null"); //NOI18N
+ } else if (user.getUserId() < 1) {
+ // Invalid id
+ throw new IllegalArgumentException(MessageFormat.format("user.userId={0} is invalid", user.getUserId())); //NOI18N
+ }
+
+ // Get named query
+ Query query = this.getEntityManager().createNamedQuery("SearchUserSharedAddressbooks", List.class); //NOI18N
+
+ // Set parameter
+ query.setParameter("user", user); //NOI18N
+
+ // Default is zero
+ Integer count = 0;
+
+ // Try it
+ try {
+ // Get whole list
+ List<ShareableAddressbook> dummy = query.getResultList();
+
+ // Set size
+ count = dummy.size();
+ } catch (final NoResultException ex) {
+ // Need to catch this, so log it
+ this.getLoggerBeanLocal().logDebug(MessageFormat.format("countAllUserSharedAddressbooks: getResultList() failed: {0}", ex)); //NOI18N
+ }
+
+ // Trace message
+ this.getLoggerBeanLocal().logTrace(MessageFormat.format("countAllUserSharedAddressbooks: count={0} - EXIT!", count)); //NOI18N
+
+ // Return count
+ return count;
+ }
+
+ @Override
+ public Boolean isUserSharingAddressbooks (final User user) {
+ // Trace message
+ this.getLoggerBeanLocal().logTrace(MessageFormat.format("isUserSharingAddressbooks: user={0} - CALLED!", user)); //NOI18N
+
+ // Is user null?
+ if (null == user) {
+ // Throw NPE
+ throw new NullPointerException("user is null"); //NOI18N
+ } else if (user.getUserId() == null) {
+ // Null userId is not allowed
+ throw new NullPointerException("user.userId is null"); //NOI18N
+ } else if (user.getUserId() < 1) {
+ // Not allowed value
+ throw new IllegalArgumentException(MessageFormat.format("user.UserId={0} is an invalid value", user.getUserId())); //NOI18N
+ }
+
+ // Get results
+ List<ShareableAddressbook> list = this.allSharedAddressbooks(user);
+
+ // Debug message
+ this.getLoggerBeanLocal().logDebug(MessageFormat.format("isUserSharingAddressbooks: list.size()={0}", list.size())); //NOI18N
+
+ // Is it not empty?
+ Boolean isSharing = (!list.isEmpty());
+
+ // Trace message
+ this.getLoggerBeanLocal().logTrace(MessageFormat.format("isUserSharingAddressbooks: iSharing={0} - EXIT!", isSharing)); //NOI18N
+
+ // Return it
+ return isSharing;
+ }
+
+ @Override
+ public ShareableAddressbook startSharing (final User sharee, final Addressbook addressbook) throws UserAlreadySharingAddressbookException {
+ // Trace message
+ this.getLoggerBeanLocal().logTrace(MessageFormat.format("startSharing: sharee={0},addressbook={1} - CALLED!", sharee, addressbook)); //NOI18N
+
+ // Check all conditions
+ if (null == sharee) {
+ // Throw NPE
+ throw new NullPointerException("sharee is null"); //NOI18N
+ } else if (sharee.getUserId() == null) {
+ // Throw NPE again
+ throw new NullPointerException("sharee.userId is null"); //NOI18N
+ } else if (sharee.getUserId() < 1) {
+ // Invalid id number
+ throw new IllegalStateException(MessageFormat.format("sharee.userId={0} is invalid", sharee.getUserId())); //NOI18N
+ } else if (null == addressbook) {
+ // Throw NPE again
+ throw new NullPointerException("addressbook is null"); //NOI18N
+ } else if (addressbook.getAddressbookId() == null) {
+ // Throw NPE again
+ throw new NullPointerException("addressbook.addressbookId is null"); //NOI18N
+ } else if (addressbook.getAddressbookId() < 1) {
+ // Invalid id number
+ throw new IllegalArgumentException(MessageFormat.format("addressbook.addressbookId={0} is invalid.", addressbook.getAddressbookId())); //NOI18N
+ } else if (Objects.equals(addressbook.getAddressbookUser(), sharee)) {
+ // Sharing with yourself!
+ throw new IllegalStateException("User tries to share with himself."); //NOI18N
+ }
+
+ // Is the entry already there?
+ if (this.isUserAlreadySharingAddressbook(addressbook, sharee)) {
+ // Abort here
+ throw new UserAlreadySharingAddressbookException(addressbook, sharee);
+ }
+
+ // All fine so far, then create the instance
+ ShareableAddressbook share = new AddressbookShare(addressbook, sharee);
+
+ // Debug message
+ this.getLoggerBeanLocal().logDebug(MessageFormat.format("startSharing: share={0}", share)); //NOI18N
+
+ // Persist it
+ this.getEntityManager().persist(share);
+
+ // Flush to get id number
+ this.getEntityManager().flush();
+
+ // Return updated instance
+ return share;
+ }
+
+ /**
+ * Checks whether the owner of the given address book is already sharing it
+ * with the sharee.
+ * <p>
+ * @param addressbook Address book to be shared with
+ * @param sharee User sharee instance
+ * <p>
+ * @return Wether the address book is already shared with the sharee
+ */
+ private boolean isUserAlreadySharingAddressbook (final Addressbook addressbook, final User sharee) {
+ // Trace message
+ this.getLoggerBeanLocal().logTrace(MessageFormat.format("isUserAlreadySharingAddressbook: addressbook={0},sharee={1} - CALLED!", addressbook, sharee)); //NOI18N
+
+ // Get named query
+ Query query = this.getEntityManager().createNamedQuery("SearchShareeAddressbookShare", AddressbookShare.class); //NOI18N
+
+ // Set parameter
+ query.setParameter("addressbook", addressbook); //NOI18N
+ query.setParameter("sharee", sharee); //NOI18N
+
+ // Default is not found
+ boolean isFound = false;
+
+ // Try it
+ try {
+ // Get single instance
+ ShareableAddressbook share = (ShareableAddressbook) query.getSingleResult();
+
+ // Debug message
+ this.getLoggerBeanLocal().logDebug(MessageFormat.format("isUserAlreadySharingAddressbook: share={0} - FOUND!", share)); //NOI18N
+
+ // Set found
+ isFound = true;
+ } catch (final NoResultException ex) {
+ // Not found, log exception
+ this.getLoggerBeanLocal().logDebug(MessageFormat.format("isUserAlreadySharingAddressbook: Notfound. Exception: {0}", ex)); //NOI18N
+ }
+
+ // Trace message
+ this.getLoggerBeanLocal().logTrace(MessageFormat.format("isUserAlreadySharingAddressbook: isFound={0} - EXIT!", isFound)); //NOI18N
+
+ // Return it
+ return isFound;
+ }
+}