hermes-server/Store/PolicyStore.cs

using HermesSocketLibrary.db;

namespace HermesSocketServer.Store
{
    public class PolicyStore : GroupSaveStore<string, Policy>
    {
        private readonly string _userId;
        private readonly Database _database;
        private readonly Serilog.ILogger _logger;
        private readonly GroupSaveSqlGenerator<Policy> _generator;


        public PolicyStore(string userId, Database database, Serilog.ILogger logger) : base(logger)
        {
            _userId = userId;
            _database = database;
            _logger = logger;

            var ctp = new Dictionary<string, string>
            {
                { "id", "Id" },
                { "userId", "UserId" },
                { "groupId", "GroupId" },
                { "path", "Path" },
                { "count", "Usage" },
                { "timespan", "Span" },
            };
            _generator = new GroupSaveSqlGenerator<Policy>(ctp);
        }

        public override async Task Load()
        {
            var data = new Dictionary<string, object>() { { "user", _userId } };
            string sql = $"SELECT id, \"groupId\", path, count, timespan FROM \"GroupPermissionPolicy\" WHERE \"userId\" = @user";
            await _database.Execute(sql, data, (reader) =>
            {
                string id = reader.GetString(0).ToString();
                _store.Add(id, new Policy()
                {
                    Id = id,
                    UserId = _userId,
                    GroupId = reader.GetString(1),
                    Path = reader.GetString(2),
                    Usage = reader.GetInt32(3),
                    Span = TimeSpan.FromMilliseconds(reader.GetInt32(4)),
                });
            });
            _logger.Information($"Loaded {_store.Count} policies from database.");
        }

        protected override void OnInitialAdd(string key, Policy value)
        {
        }

        protected override void OnInitialModify(string key, Policy value)
        {
        }

        protected override void OnInitialRemove(string key)
        {
        }

        public override async Task<bool> Save()
        {
            int count = 0;
            string sql = string.Empty;

            if (_added.Any())
            {
                lock (_lock)
                {
                    count = _added.Count;
                    sql = _generator.GenerateInsertSql("GroupPermissionPolicy", _added.Select(a => _store[a]), ["id", "userId", "groupId", "path", "count", "timespan"]);
                    _added.Clear();
                }

                _logger.Debug($"GroupPermissionPolicy - Adding {count} rows to database: {sql}");
                await _database.ExecuteScalar(sql);
            }
            if (_modified.Any())
            {
                lock (_lock)
                {
                    count = _modified.Count;
                    sql = _generator.GenerateUpdateSql("GroupPermissionPolicy", _modified.Select(m => _store[m]), ["id"], ["userId", "groupId", "path", "count", "timespan"]);
                    _modified.Clear();
                }
                _logger.Debug($"GroupPermissionPolicy - Modifying {count} rows in database: {sql}");
                await _database.ExecuteScalar(sql);
            }
            if (_deleted.Any())
            {
                lock (_lock)
                {
                    count = _deleted.Count;
                    sql = _generator.GenerateDeleteSql("GroupPermissionPolicy", _deleted, ["id"]);
                    _deleted.Clear();
                }
                _logger.Debug($"GroupPermissionPolicy - Deleting {count} rows from database: {sql}");
                await _database.ExecuteScalar(sql);
            }
            return true;
        }
    }
}