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.DeleteForumMessageAttachmentForm;
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 DeleteForumMessageAttachmentCommand
033        extends BaseSimpleCommand<DeleteForumMessageAttachmentForm> {
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                new FieldDefinition("ForumMessageAttachmentSequence", FieldType.UNSIGNED_INTEGER, true, null, null)
041                );
042    }
043    
044    /** Creates a new instance of DeleteForumMessageAttachmentCommand */
045    public DeleteForumMessageAttachmentCommand() {
046        super(null, FORM_FIELD_DEFINITIONS, false);
047    }
048    
049    @Override
050    protected BaseResult execute() {
051        var forumControl = Session.getModelController(ForumControl.class);
052        var forumMessageName = form.getForumMessageName();
053        var forumMessage = forumControl.getForumMessageByNameForUpdate(forumMessageName);
054        
055        if(forumMessage != null) {
056            var forumMessageAttachmentSequence = Integer.valueOf(form.getForumMessageAttachmentSequence());
057            var forumMessageAttachment = forumControl.getForumMessageAttachmentBySequenceForUpdate(forumMessage, forumMessageAttachmentSequence);
058
059            if(forumMessageAttachment != null) {
060                forumControl.deleteForumMessageAttachment(forumMessageAttachment, getPartyPK());
061            } else {
062                addExecutionError(ExecutionErrors.UnknownForumMessageAttachment.name(), forumMessageName, forumMessageAttachmentSequence.toString());
063            }
064        } else {
065            addExecutionError(ExecutionErrors.UnknownForumMessageName.name(), forumMessageName);
066        }
067        
068        return null;
069    }
070    
071}