DigitalData.Core/DigitalData.Core.Application/DirectorySearchService.cs

using DigitalData.Core.Contracts.Application;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using System.Configuration;
using System.Diagnostics.CodeAnalysis;
using System.DirectoryServices;
using Microsoft.Extensions.Caching.Memory;

namespace DigitalData.Core.Application
{
    [SuppressMessage("Interoperability", "CA1416:Validate platform compatibility", Justification = "<Pending>")]
    public class DirectorySearchService : ServiceBase, IDirectorySearchService
    {
        private readonly IMemoryCache _memoryCache;
        public readonly string SearchRootPath;

        public DirectorySearchService(IConfiguration configuration, ILogger<DirectoryService> logger, IMemoryCache memoryCache)
        {
            SearchRootPath = configuration["DirectorySearch:SearchRootPath"] ?? throw new ConfigurationErrorsException("SearchRootPath configuration is missing.");
            _memoryCache = memoryCache;
        }

        public IServiceResult<IEnumerable<ResultPropertyCollection>> FindAll(DirectoryEntry searchRoot, string filter, SearchScope searchScope = SearchScope.Subtree, int sizeLimit = 5000)
        {
            List<ResultPropertyCollection> list = new();

            var searcher = new DirectorySearcher()
            {
                Filter = filter,
                SearchScope = searchScope,
                SizeLimit = sizeLimit,
                SearchRoot = searchRoot
            };

            foreach (SearchResult result in searcher.FindAll())
            {
                ResultPropertyCollection rpc = result.Properties;
                list.Add(rpc);
            }

            return Successful<IEnumerable<ResultPropertyCollection>>(list);
        }

        public IServiceResult<IEnumerable<ResultPropertyCollection>> FindAllByUserCache(string username, string filter, SearchScope searchScope = SearchScope.Subtree, int sizeLimit = 5000)
        {
            List<ResultPropertyCollection> list = new();

            _memoryCache.TryGetValue(username, out DirectoryEntry? searchRoot);

            if (searchRoot is null)
                return Failed<IEnumerable<ResultPropertyCollection>>(MessageKey.DirSearcherDisconnected.ToString());

            return FindAll(searchRoot, filter, searchScope, sizeLimit);
        }
    }
}