// SignerRole.cs
//
// XAdES Starter Kit for Microsoft .NET 3.5 (and above)
// 2010 Microsoft France
// Published under the CECILL-B Free Software license agreement.
// (http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.txt)
// 
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, 
// WHETHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED 
// WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE. 
// THE ENTIRE RISK OF USE OR RESULTS IN CONNECTION WITH THE USE OF THIS CODE 
// AND INFORMATION REMAINS WITH THE USER.

using System;
using System.Xml;

namespace Microsoft.Xades
{
    /// <summary>
    /// According to what has been stated in the Introduction clause, an
    /// electronic signature produced in accordance with the present document
    /// incorporates: "a commitment that has been explicitly endorsed under a
    /// signature policy, at a given time, by a signer under an identifier,
    /// e.g. a name or a pseudonym, and optionally a role".
    /// While the name of the signer is important, the position of the signer
    /// within a company or an organization can be even more important. Some
    /// contracts may only be valid if signed by a user in a particular role,
    /// e.g. a Sales Director. In many cases who the sales Director really is,
    /// is not that important but being sure that the signer is empowered by his
    /// company to be the Sales Director is fundamental.
    /// </summary>
    public class SignerRole
    {
        #region Private variables
        private ClaimedRoles claimedRoles;
        private CertifiedRoles certifiedRoles;
        #endregion

        #region Public properties
        /// <summary>
        /// The ClaimedRoles element contains a sequence of roles claimed by
        /// the signer but not certified. Additional contents types may be
        /// defined on a domain application basis and be part of this element.
        /// The namespaces given to the corresponding XML schemas will allow
        /// their unambiguous identification in the case these roles use XML.
        /// </summary>
        public ClaimedRoles ClaimedRoles
        {
            get
            {
                return this.claimedRoles;
            }
            set
            {
                this.claimedRoles = value;
            }
        }

        /// <summary>
        /// The CertifiedRoles element contains one or more wrapped attribute
        /// certificates for the signer
        /// </summary>
        public CertifiedRoles CertifiedRoles
        {
            get
            {
                return this.certifiedRoles;
            }
            set
            {
                this.certifiedRoles = value;
            }
        }
        #endregion

        #region Constructors
        /// <summary>
        /// Default constructor
        /// </summary>
        public SignerRole()
        {
            this.claimedRoles = new ClaimedRoles();
            this.certifiedRoles = new CertifiedRoles();
        }
        #endregion

        #region Public methods
        /// <summary>
        /// Check to see if something has changed in this instance and needs to be serialized
        /// </summary>
        /// <returns>Flag indicating if a member needs serialization</returns>
        public bool HasChanged()
        {
            bool retVal = false;

            if (this.claimedRoles != null && this.claimedRoles.HasChanged())
            {
                retVal = true;
            }

            if (this.certifiedRoles != null && this.certifiedRoles.HasChanged())
            {
                retVal = true;
            }

            return retVal;
        }

        /// <summary>
        /// Load state from an XML element
        /// </summary>
        /// <param name="xmlElement">XML element containing new state</param>
        public void LoadXml(System.Xml.XmlElement xmlElement)
        {
            XmlNamespaceManager xmlNamespaceManager;
            XmlNodeList xmlNodeList;

            if (xmlElement == null)
            {
                throw new ArgumentNullException("xmlElement");
            }

            xmlNamespaceManager = new XmlNamespaceManager(xmlElement.OwnerDocument.NameTable);
            xmlNamespaceManager.AddNamespace("xsd", XadesSignedXml.XadesNamespaceUri);

            xmlNodeList = xmlElement.SelectNodes("xsd:ClaimedRoles", xmlNamespaceManager);
            if (xmlNodeList.Count != 0)
            {
                this.claimedRoles = new ClaimedRoles();
                this.claimedRoles.LoadXml((XmlElement)xmlNodeList.Item(0));
            }

            xmlNodeList = xmlElement.SelectNodes("xsd:CertifiedRoles", xmlNamespaceManager);
            if (xmlNodeList.Count != 0)
            {
                this.certifiedRoles = new CertifiedRoles();
                this.certifiedRoles.LoadXml((XmlElement)xmlNodeList.Item(0));
            }
        }

        /// <summary>
        /// Returns the XML representation of the this object
        /// </summary>
        /// <returns>XML element containing the state of this object</returns>
        public XmlElement GetXml()
        {
            XmlDocument creationXmlDocument;
            XmlElement retVal;

            creationXmlDocument = new XmlDocument();
            retVal = creationXmlDocument.CreateElement("xades", "SignerRole", XadesSignedXml.XadesNamespaceUri);

            if (this.claimedRoles != null && this.claimedRoles.HasChanged())
            {
                retVal.AppendChild(creationXmlDocument.ImportNode(this.claimedRoles.GetXml(), true));
            }

            if (this.certifiedRoles != null && this.certifiedRoles.HasChanged())
            {
                retVal.AppendChild(creationXmlDocument.ImportNode(this.certifiedRoles.GetXml(), true));
            }

            return retVal;
        }
        #endregion
    }
}
