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.letter.server.command;
018
019import com.echothree.control.user.letter.common.form.DeleteLetterForm;
020import com.echothree.model.control.chain.server.control.ChainControl;
021import com.echothree.model.control.letter.server.control.LetterControl;
022import com.echothree.model.control.party.common.PartyTypes;
023import com.echothree.model.control.security.common.SecurityRoleGroups;
024import com.echothree.model.control.security.common.SecurityRoles;
025import com.echothree.model.data.user.common.pk.UserVisitPK;
026import com.echothree.util.common.message.ExecutionErrors;
027import com.echothree.util.common.validation.FieldDefinition;
028import com.echothree.util.common.validation.FieldType;
029import com.echothree.util.common.command.BaseResult;
030import com.echothree.util.server.control.BaseSimpleCommand;
031import com.echothree.util.server.control.CommandSecurityDefinition;
032import com.echothree.util.server.control.PartyTypeDefinition;
033import com.echothree.util.server.control.SecurityRoleDefinition;
034import com.echothree.util.server.persistence.Session;
035import java.util.List;
036import javax.enterprise.context.Dependent;
037
038@Dependent
039public class DeleteLetterCommand
040        extends BaseSimpleCommand<DeleteLetterForm> {
041    
042    private final static CommandSecurityDefinition COMMAND_SECURITY_DEFINITION;
043    private final static List<FieldDefinition> FORM_FIELD_DEFINITIONS;
044    
045    static {
046        COMMAND_SECURITY_DEFINITION = new CommandSecurityDefinition(List.of(
047                new PartyTypeDefinition(PartyTypes.UTILITY.name(), null),
048                new PartyTypeDefinition(PartyTypes.EMPLOYEE.name(), List.of(
049                        new SecurityRoleDefinition(SecurityRoleGroups.Letter.name(), SecurityRoles.Delete.name())
050                        ))
051                ));
052        
053        FORM_FIELD_DEFINITIONS = List.of(
054                new FieldDefinition("ChainKindName", FieldType.ENTITY_NAME, true, null, null),
055                new FieldDefinition("ChainTypeName", FieldType.ENTITY_NAME, true, null, null),
056                new FieldDefinition("LetterName", FieldType.ENTITY_NAME, true, null, null)
057                );
058    }
059    
060    /** Creates a new instance of DeleteLetterCommand */
061    public DeleteLetterCommand() {
062        super(COMMAND_SECURITY_DEFINITION, FORM_FIELD_DEFINITIONS, false);
063    }
064    
065    @Override
066    protected BaseResult execute() {
067        var chainControl = Session.getModelController(ChainControl.class);
068        var chainKindName = form.getChainKindName();
069        var chainKind = chainControl.getChainKindByName(chainKindName);
070        
071        if(chainKind != null) {
072            var chainTypeName = form.getChainTypeName();
073            var chainType = chainControl.getChainTypeByName(chainKind, chainTypeName);
074            
075            if(chainType != null) {
076                var letterControl = Session.getModelController(LetterControl.class);
077                var letterName = form.getLetterName();
078                var letter = letterControl.getLetterByNameForUpdate(chainType, letterName);
079                
080                if(letter != null) {
081                    letterControl.deleteLetter(letter, getPartyPK());
082                } else {
083                    addExecutionError(ExecutionErrors.UnknownLetterName.name(), letterName);
084                }
085            } else {
086                addExecutionError(ExecutionErrors.UnknownChainTypeName.name(), chainTypeName);
087            }
088        } else {
089            addExecutionError(ExecutionErrors.UnknownChainKindName.name(), chainKindName);
090        }
091        
092        return null;
093    }
094    
095}