XmppAddress.cs

using Waher.Persistence;
 
namespace Waher.Networking.XMPP.Server
{
    public class XmppAddress
    {
        private readonly CaseInsensitiveString address;
        private CaseInsensitiveString bareJid = null;
        private CaseInsensitiveString domain = null;
        private CaseInsensitiveString account = null;
        private CaseInsensitiveString resource = null;
 
        public XmppAddress(CaseInsensitiveString Address)
        {
            if (Address?.Value is null)
                this.address = CaseInsensitiveString.Empty;
            else
                this.address = Address;
        }
 
        public readonly static XmppAddress Empty = new XmppAddress(CaseInsensitiveString.Empty);
 
        public CaseInsensitiveString Address
        {
            get => this.address;
        }
 
        public CaseInsensitiveString BareJid
        {
            get
            {
                if ((object)this.bareJid is null)
                {
                    int i = this.address.IndexOf('/');
                    if (i < 0)
                    {
                        this.bareJid = this.address;
                        this.resource = CaseInsensitiveString.Empty;
                    }
                    else
                    {
                        this.bareJid = this.address.Substring(0, i);
                        this.resource = this.address.Substring(i + 1);
                    }
                }
 
                return this.bareJid;
            }
        }
 
        public CaseInsensitiveString Resource
        {
            get
            {
                if ((object)this.resource is null)
                {
                    int i = this.address.IndexOf('/');
                    if (i < 0)
                    {
                        this.bareJid = this.address;
                        this.resource = CaseInsensitiveString.Empty;
                    }
                    else
                    {
                        this.bareJid = this.address.Substring(0, i);
                        this.resource = this.address.Substring(i + 1);
                    }
                }
 
                return this.resource;
            }
        }
 
        public CaseInsensitiveString Domain
        {
            get
            {
                if ((object)this.domain is null)
                {
                    CaseInsensitiveString s = this.BareJid;
                    int i = s.IndexOf('@');
                    if (i < 0)
                    {
                        this.domain = s;
                        this.account = CaseInsensitiveString.Empty;
                    }
                    else
                    {
                        this.account = s.Substring(0, i);
                        this.domain = s.Substring(i + 1);
                    }
                }
 
                return this.domain;
            }
        }
 
        public CaseInsensitiveString Account
        {
            get
            {
                if ((object)this.account is null)
                {
                    CaseInsensitiveString s = this.BareJid;
                    int i = s.IndexOf('@');
                    if (i < 0)
                    {
                        this.domain = s;
                        this.account = CaseInsensitiveString.Empty;
                    }
                    else
                    {
                        this.account = s.Substring(0, i);
                        this.domain = s.Substring(i + 1);
                    }
                }
 
                return this.account;
            }
        }
 
        public bool IsFullJID
        {
            get { return !CaseInsensitiveString.IsNullOrEmpty(this.Resource); }
        }
 
        public bool IsBareJID
        {
            get { return CaseInsensitiveString.IsNullOrEmpty(this.Resource); }
        }
 
        public bool HasAccount
        {
            get { return !CaseInsensitiveString.IsNullOrEmpty(this.Account); }
        }
 
        public bool IsDomain
        {
            get { return CaseInsensitiveString.IsNullOrEmpty(this.Account) && CaseInsensitiveString.IsNullOrEmpty(this.Resource); }
        }
 
        public bool IsEmpty
        {
            get { return CaseInsensitiveString.IsNullOrEmpty(this.address); }
        }
 
        public override string ToString()
        {
            return this.address.Value;
        }
 
        public override bool Equals(object obj)
        {
            return obj is XmppAddress Addr && this.address == Addr.address;
        }
 
        public override int GetHashCode()
        {
            return this.address.GetHashCode();
        }
 
        public XmppAddress ToBareJID()
        {
            if (this.IsBareJID)
                return this;
            else
                return new XmppAddress(this.BareJid);
        }
 
    }
}