oqtane.framework/Oqtane.Server/Repository/LogRepository.cs

using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;
using System.Linq;
using Oqtane.Models;

namespace Oqtane.Repository
{
    public class LogRepository : ILogRepository
    {
        private TenantDBContext db;

        public LogRepository(TenantDBContext context)
        {
            db = context;
        }

        public IEnumerable<Log> GetLogs(int SiteId, string Level, string Function, int Rows)
        {
            if (Level == null)
            {
                if (Function == null)
                {
                    return db.Log.Where(item => item.SiteId == SiteId).
                        OrderByDescending(item => item.LogDate).Take(Rows);
                }
                else
                {
                    return db.Log.Where(item => item.SiteId == SiteId && item.Function == Function).
                        OrderByDescending(item => item.LogDate).Take(Rows);
                }
            }
            else
            {
                if (Function == null)
                {
                    return db.Log.Where(item => item.SiteId == SiteId && item.Level == Level)
                        .OrderByDescending(item => item.LogDate).Take(Rows);
                }
                else
                {
                    return db.Log.Where(item => item.SiteId == SiteId && item.Level == Level && item.Function == Function)
                        .OrderByDescending(item => item.LogDate).Take(Rows);
                }
            }
        }

        public Log GetLog(int LogId)
        {
            return db.Log.Find(LogId);
        }

        public void AddLog(Log Log)
        {
            db.Log.Add(Log);
            db.SaveChanges();
        }
    }
}