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.chain.server.command;
018
019import com.echothree.control.user.chain.common.form.GetChainInstancesForm;
020import com.echothree.control.user.chain.common.result.ChainResultFactory;
021import com.echothree.model.control.chain.server.control.ChainControl;
022import com.echothree.model.data.user.common.pk.UserVisitPK;
023import com.echothree.util.common.message.ExecutionErrors;
024import com.echothree.util.common.validation.FieldDefinition;
025import com.echothree.util.common.validation.FieldType;
026import com.echothree.util.common.command.BaseResult;
027import com.echothree.util.server.control.BaseSimpleCommand;
028import com.echothree.util.server.persistence.Session;
029import java.util.List;
030import javax.enterprise.context.Dependent;
031
032@Dependent
033public class GetChainInstancesCommand
034        extends BaseSimpleCommand<GetChainInstancesForm> {
035    
036    private final static List<FieldDefinition> FORM_FIELD_DEFINITIONS;
037    
038    static {
039        FORM_FIELD_DEFINITIONS = List.of(
040                new FieldDefinition("ChainKindName", FieldType.ENTITY_NAME, true, null, null),
041                new FieldDefinition("ChainTypeName", FieldType.ENTITY_NAME, true, null, null),
042                new FieldDefinition("ChainName", FieldType.ENTITY_NAME, true, null, null)
043                );
044    }
045    
046    /** Creates a new instance of GetChainInstancesCommand */
047    public GetChainInstancesCommand() {
048        super(null, FORM_FIELD_DEFINITIONS, true);
049    }
050    
051    @Override
052    protected BaseResult execute() {
053        var chainControl = Session.getModelController(ChainControl.class);
054        var result = ChainResultFactory.getGetChainInstancesResult();
055        var chainKindName = form.getChainKindName();
056        var chainKind = chainControl.getChainKindByName(chainKindName);
057        
058        if(chainKind != null) {
059            var chainTypeName = form.getChainTypeName();
060            var chainType = chainControl.getChainTypeByName(chainKind, chainTypeName);
061            
062            if(chainType != null) {
063                var chainName = form.getChainName();
064                var chain = chainControl.getChainByName(chainType, chainName);
065                
066                if(chain != null) {
067                    result.setChain(chainControl.getChainTransfer(getUserVisit(), chain));
068                    result.setChainInstances(chainControl.getChainInstanceTransfersByChain(getUserVisit(), chain));
069                } else {
070                    addExecutionError(ExecutionErrors.UnknownChainName.name(), chainKindName, chainTypeName, chainName);
071                }
072            } else {
073                addExecutionError(ExecutionErrors.UnknownChainTypeName.name(), chainKindName, chainTypeName);
074            }
075        } else {
076            addExecutionError(ExecutionErrors.UnknownChainKindName.name(), chainKindName);
077        }
078        
079        return result;
080    }
081    
082}