001// --------------------------------------------------------------------------------
002// Copyright 2002-2026 Echo Three, LLC
003//
004// Licensed under the Apache License, Version 2.0 (the "License");
005// you may not use this file except in compliance with the License.
006// You may obtain a copy of the License at
007//
008//     http://www.apache.org/licenses/LICENSE-2.0
009//
010// Unless required by applicable law or agreed to in writing, software
011// distributed under the License is distributed on an "AS IS" BASIS,
012// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013// See the License for the specific language governing permissions and
014// limitations under the License.
015// --------------------------------------------------------------------------------
016
017package com.echothree.control.user.forum.server.command;
018
019import com.echothree.control.user.forum.common.form.DeleteForumMessageForm;
020import com.echothree.model.control.forum.server.control.ForumControl;
021import com.echothree.model.data.user.common.pk.UserVisitPK;
022import com.echothree.util.common.message.ExecutionErrors;
023import com.echothree.util.common.validation.FieldDefinition;
024import com.echothree.util.common.validation.FieldType;
025import com.echothree.util.common.command.BaseResult;
026import com.echothree.util.server.control.BaseSimpleCommand;
027import java.util.List;
028import javax.enterprise.context.Dependent;
029import javax.inject.Inject;
030
031@Dependent
032public class DeleteForumMessageCommand
033        extends BaseSimpleCommand<DeleteForumMessageForm> {
034    
035    private final static List<FieldDefinition> FORM_FIELD_DEFINITIONS;
036    
037    static {
038        FORM_FIELD_DEFINITIONS = List.of(
039                new FieldDefinition("ForumMessageName", FieldType.ENTITY_NAME, true, null, null)
040        );
041    }
042
043    @Inject
044    ForumControl forumControl;
045
046    
047    /** Creates a new instance of DeleteForumMessageCommand */
048    public DeleteForumMessageCommand() {
049        super(null, FORM_FIELD_DEFINITIONS, false);
050    }
051    
052    @Override
053    protected BaseResult execute() {
054        var forumMessageName = form.getForumMessageName();
055        var forumMessage = forumControl.getForumMessageByNameForUpdate(forumMessageName);
056        
057        if(forumMessage != null) {
058            var forumThread = forumMessage.getLastDetail().getForumThreadForUpdate();
059            var deletedBy = getPartyPK();
060            
061            if(forumControl.countForumMessagesByForumThread(forumThread) == 1) {
062                forumControl.deleteForumThread(forumThread, deletedBy);
063            } else {
064                forumControl.deleteForumMessage(forumMessage, deletedBy);
065            }
066        } else {
067            addExecutionError(ExecutionErrors.UnknownForumMessageName.name(), forumMessageName);
068        }
069        
070        return null;
071    }
072    
073}