001// --------------------------------------------------------------------------------
002// Copyright 2002-2024 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.model.control.vendor.server.logic;
018
019import com.echothree.control.user.vendor.common.spec.VendorItemUniversalSpec;
020import com.echothree.model.control.core.common.ComponentVendors;
021import com.echothree.model.control.core.common.EntityTypes;
022import com.echothree.model.control.core.common.exception.InvalidParameterCountException;
023import com.echothree.model.control.core.server.logic.EntityInstanceLogic;
024import com.echothree.model.control.vendor.common.exception.UnknownVendorItemNameException;
025import com.echothree.model.control.vendor.server.control.VendorControl;
026import com.echothree.model.data.vendor.server.entity.VendorItem;
027import com.echothree.util.common.message.ExecutionErrors;
028import com.echothree.util.server.control.BaseLogic;
029import com.echothree.util.server.message.ExecutionErrorAccumulator;
030import com.echothree.util.server.persistence.EntityPermission;
031import com.echothree.util.server.persistence.Session;
032import com.echothree.util.server.validation.ParameterUtils;
033
034public class VendorItemLogic
035        extends BaseLogic {
036
037    private VendorItemLogic() {
038        super();
039    }
040    
041    private static class VendorItemLogicHolder {
042        static VendorItemLogic instance = new VendorItemLogic();
043    }
044    
045    public static VendorItemLogic getInstance() {
046        return VendorItemLogicHolder.instance;
047    }
048
049    public VendorItem getVendorItemByUniversalSpec(final ExecutionErrorAccumulator eea, final VendorItemUniversalSpec universalSpec,
050            final EntityPermission entityPermission) {
051        var vendorControl = Session.getModelController(VendorControl.class);
052        var vendorName = universalSpec.getVendorName();
053        var partyName = universalSpec.getPartyName();
054        var nameParameterCount = ParameterUtils.getInstance().countNonNullParameters(vendorName, partyName);
055        var possibleEntitySpecs = EntityInstanceLogic.getInstance().countPossibleEntitySpecs(universalSpec);
056        VendorItem vendorItem = null;
057
058        if(nameParameterCount == 1 && possibleEntitySpecs == 0) {
059            var vendorItemName = universalSpec.getVendorItemName();
060
061            if(vendorItemName != null) {
062                var vendor = VendorLogic.getInstance().getVendorByName(eea, vendorName, partyName, null);
063                var vendorParty = vendor.getParty();
064
065                vendorItem = vendorControl.getVendorItemByVendorPartyAndVendorItemName(vendorParty, vendorItemName, entityPermission);
066
067                if(vendorItem == null) {
068                    handleExecutionError(UnknownVendorItemNameException.class, eea, ExecutionErrors.UnknownVendorItemName.name(),
069                            vendor.getVendorName(), vendorItemName);
070
071                }
072            } else {
073                handleExecutionError(InvalidParameterCountException.class, eea, ExecutionErrors.InvalidParameterCount.name());
074            }
075        } else if(nameParameterCount == 0 && possibleEntitySpecs == 1) {
076            var entityInstance = EntityInstanceLogic.getInstance().getEntityInstance(eea, universalSpec,
077                    ComponentVendors.ECHO_THREE.name(), EntityTypes.WorkflowStep.name());
078
079            if(!eea.hasExecutionErrors()) {
080                vendorItem = vendorControl.getVendorItemByEntityInstance(entityInstance, entityPermission);
081            }
082        } else {
083            handleExecutionError(InvalidParameterCountException.class, eea, ExecutionErrors.InvalidParameterCount.name());
084        }
085
086        return vendorItem;
087    }
088
089    public VendorItem getVendorItemByUniversalSpec(final ExecutionErrorAccumulator eea, final VendorItemUniversalSpec universalSpec) {
090        return getVendorItemByUniversalSpec(eea, universalSpec, EntityPermission.READ_ONLY);
091    }
092
093    public VendorItem getVendorItemByUniversalSpecForUpdate(final ExecutionErrorAccumulator eea, final VendorItemUniversalSpec universalSpec) {
094        return getVendorItemByUniversalSpec(eea, universalSpec, EntityPermission.READ_WRITE);
095    }
096
097}