src/ZKEACMS/Rule/RuleService.cs

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/* http://www.zkea.net/ 
 * Copyright (c) ZKEASOFT. All rights reserved. 
 * http://www.zkea.net/licenses */

using Easy;
using Easy.RepositoryPattern;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Text;
using Easy.Extend;
using ZKEACMS.Extend;
using System.Linq;
using ZKEACMS.Widget;
using Easy.RuleEngine;
using Easy.Serializer;

namespace ZKEACMS.Rule
{
    public class RuleService : ServiceBase<Rule, CMSDbContext>, IRuleService
    {
        private readonly IWidgetBasePartService _widgetBasePartService;
        private readonly IWidgetActivator _widgetActivator;
        private readonly IRuleManager _ruleManager;
        private readonly ILocalize _localize;
        public RuleService(IApplicationContext applicationContext,
            IWidgetBasePartService widgetBasePartService,
            IWidgetActivator widgetActivator, IRuleManager
            ruleManager, CMSDbContext dbContext,
            ILocalize localize)
            : base(applicationContext, dbContext)
        {
            _widgetBasePartService = widgetBasePartService;
            _widgetActivator = widgetActivator;
            _ruleManager = ruleManager;
            _localize = localize;
        }
        private Rule Init(Rule item)
        {
            item.RuleItemList = item.RuleItemList.RemoveDeletedItems().ToList();
            item.RuleItems = JsonConverter.Serialize(item.RuleItemList);
            StringBuilder expressionBuilder = new StringBuilder();
            foreach (var ruleItem in item.RuleItemList)
            {
                if (expressionBuilder.Length == 0)
                {
                    expressionBuilder.AppendFormat("{0}({1},{2})", ruleItem.FunctionName, ruleItem.Property, FormatValue(ruleItem.Value));
                }
                else
                {
                    expressionBuilder.AppendFormat(" {3} {0}({1},{2})", ruleItem.FunctionName, ruleItem.Property, FormatValue(ruleItem.Value), ruleItem.Condition);
                }
            }
            item.RuleExpression = expressionBuilder.ToString();
            if (item.RuleExpression.IsNullOrWhiteSpace())
            {
                item.RuleExpression = "false";
            }
            return item;
        }