DeviceEmotion/ApiService/http_server/Response_CacheControl.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace System.Net.ApiService {
    public class Response_CacheControl {

        [Flags]
        public enum eCacheControl {
            none = 0,
            no_cache = 1,
            no_store = 2,
            no_transform = 4,
            must_revalidate = 8,
            public_cache = 16,
            private_cache = 32,
            proxy_revalidate = 64
        }

        private TimeSpan _maxAge;
        private TimeSpan _sMaxAge;
        private eCacheControl _options;

        public Response_CacheControl(TimeSpan MaxAge) {
            this._maxAge = MaxAge;
        }

        public Response_CacheControl(TimeSpan MaxAge, TimeSpan SMaxAge) {
            this._maxAge = MaxAge;
            this._sMaxAge = SMaxAge;
        }

        public Response_CacheControl(TimeSpan MaxAge, eCacheControl Options) {
            this._maxAge = MaxAge;
            this._options = Options;
        }

        public Response_CacheControl(eCacheControl Options) {
            this._options = Options;
        }

        public Response_CacheControl(TimeSpan MaxAge, TimeSpan SMaxAge, eCacheControl Options) {
            this._maxAge = MaxAge;
            this._sMaxAge = SMaxAge;
            this._options = Options;
        }

        public bool IsSet {
            get {
                return this._maxAge.TotalSeconds > 0 || this._sMaxAge.TotalSeconds > 0 || this._options != eCacheControl.none;
            }
        }

        public TimeSpan MaxAge {
            get => this._maxAge;
            set {
                if (value == null) {
                    this._maxAge = new TimeSpan(0);
                } else {
                    this._maxAge = value;
                }
            }
        }

        public TimeSpan SMaxAge {
            get => this._sMaxAge;
            set {
                if (value == null) {
                    this._sMaxAge = new TimeSpan(0);
                } else {
                    this._sMaxAge = value;
                }
            }
        }

        public eCacheControl Options {
            get => this._options;
            set {
                this._options = value;
            }
        }

        public override string ToString() {
            string s = "";
            if (this._maxAge.TotalSeconds > 0)
                s += (s==""?"":", ") + "max-age: " + this._maxAge.TotalSeconds;
            if (this._sMaxAge.TotalSeconds > 0)
                s += (s == "" ? "" : ", ") + "s-maxage: " + this._maxAge.TotalSeconds;
            if (this._options != eCacheControl.none) {
                if((this._options & eCacheControl.must_revalidate) == this._options)
                    s += (s == "" ? "" : ", ") + "must-revalidate";
                if ((this._options & eCacheControl.no_cache) == this._options)
                    s += (s == "" ? "" : ", ") + "no-cache";
                if ((this._options & eCacheControl.no_store) == this._options)
                    s += (s == "" ? "" : ", ") + "no-store";
                if ((this._options & eCacheControl.no_transform) == this._options)
                    s += (s == "" ? "" : ", ") + "no-transform";
                if ((this._options & eCacheControl.private_cache) == this._options)
                    s += (s == "" ? "" : ", ") + "private";
                if ((this._options & eCacheControl.public_cache) == this._options)
                    s += (s == "" ? "" : ", ") + "public";
                if ((this._options & eCacheControl.proxy_revalidate) == this._options)
                    s += (s == "" ? "" : ", ") + "proxy-revalidate";
            }
            return s;
        }

    }
}