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 com.echothree.util.server.persistence.Session;
028import java.util.List;
029import javax.enterprise.context.Dependent;
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    /** Creates a new instance of DeleteForumMessageCommand */
044    public DeleteForumMessageCommand() {
045        super(null, FORM_FIELD_DEFINITIONS, false);
046    }
047    
048    @Override
049    protected BaseResult execute() {
050        var forumControl = Session.getModelController(ForumControl.class);
051        var forumMessageName = form.getForumMessageName();
052        var forumMessage = forumControl.getForumMessageByNameForUpdate(forumMessageName);
053        
054        if(forumMessage != null) {
055            var forumThread = forumMessage.getLastDetail().getForumThreadForUpdate();
056            var deletedBy = getPartyPK();
057            
058            if(forumControl.countForumMessagesByForumThread(forumThread) == 1) {
059                forumControl.deleteForumThread(forumThread, deletedBy);
060            } else {
061                forumControl.deleteForumMessage(forumMessage, deletedBy);
062            }
063        } else {
064            addExecutionError(ExecutionErrors.UnknownForumMessageName.name(), forumMessageName);
065        }
066        
067        return null;
068    }
069    
070}