001// --------------------------------------------------------------------------------
002// Copyright 2002-2025 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.item.server.logic;
018
019import com.echothree.model.control.item.common.exception.MissingDefaultItemCategoryException;
020import com.echothree.model.control.item.common.exception.UnknownItemCategoryNameException;
021import com.echothree.model.control.item.server.control.ItemControl;
022import com.echothree.model.data.item.server.entity.ItemCategory;
023import com.echothree.util.common.message.ExecutionErrors;
024import com.echothree.util.common.persistence.BasePK;
025import com.echothree.util.server.control.BaseLogic;
026import com.echothree.util.server.message.ExecutionErrorAccumulator;
027import com.echothree.util.server.persistence.EntityPermission;
028import com.echothree.util.server.persistence.Session;
029import javax.enterprise.context.ApplicationScoped;
030import javax.enterprise.inject.spi.CDI;
031
032@ApplicationScoped
033public class ItemCategoryLogic
034        extends BaseLogic {
035
036    protected ItemCategoryLogic() {
037        super();
038    }
039
040    public static ItemCategoryLogic getInstance() {
041        return CDI.current().select(ItemCategoryLogic.class).get();
042    }
043
044    public ItemCategory getItemCategoryByName(final ExecutionErrorAccumulator eea, final String itemCategoryName, EntityPermission entityPermission) {
045        var itemControl = Session.getModelController(ItemControl.class);
046        var itemCategory = itemControl.getItemCategoryByName(itemCategoryName, entityPermission);
047
048        if(itemCategory == null) {
049            handleExecutionError(UnknownItemCategoryNameException.class, eea, ExecutionErrors.UnknownItemCategoryName.name(), itemCategoryName);
050        }
051
052        return itemCategory;
053    }
054
055    public ItemCategory getItemCategoryByName(final ExecutionErrorAccumulator eea, final String itemCategoryName) {
056        return getItemCategoryByName(eea, itemCategoryName, EntityPermission.READ_ONLY);
057    }
058
059    public ItemCategory getItemCategoryByNameForUpdate(final ExecutionErrorAccumulator eea, final String itemCategoryName) {
060        return getItemCategoryByName(eea, itemCategoryName, EntityPermission.READ_WRITE);
061    }
062
063    private long countItemsByItemCategoryChildren(final ItemControl itemControl, final ItemCategory parentItemCategory) {
064        var itemCategoryChildren = itemControl.getItemCategoriesByParentItemCategory(parentItemCategory);
065        var total = itemControl.countItemsByItemCategory(parentItemCategory);
066
067        total = itemCategoryChildren.stream().map((childItemCategory) -> countItemsByItemCategoryChildren(itemControl, childItemCategory)).reduce(total, (accumulator, _item) -> accumulator + _item);
068
069        return total;
070    }
071
072    public void checkDeleteItemCategory(final ExecutionErrorAccumulator ema, final ItemCategory itemCategory) {
073        var itemControl = Session.getModelController(ItemControl.class);
074        
075        if(countItemsByItemCategoryChildren(itemControl, itemCategory) != 0) {
076            ema.addExecutionError(ExecutionErrors.CannotDeleteItemCategoryInUse.name(), itemCategory.getLastDetail().getItemCategoryName());
077        }
078    }
079
080
081    public ItemCategory getDefaultItemCategory(final ExecutionErrorAccumulator eea) {
082        var itemControl = Session.getModelController(ItemControl.class);
083        var itemCategory = itemControl.getDefaultItemCategory();
084
085        if(itemCategory == null) {
086            handleExecutionError(MissingDefaultItemCategoryException.class, eea, ExecutionErrors.MissingDefaultItemCategory.name());
087        }
088        
089        return itemCategory;
090    }
091    
092    public void deleteItemCategory(final ItemCategory itemCategory, final BasePK deletedBy) {
093        var itemControl = Session.getModelController(ItemControl.class);
094
095        itemControl.deleteItemCategory(itemCategory, deletedBy);
096    }
097
098}