/ExpressInteropBinding/Microsoft.ServiceModel.Interop.ExtensionUtils/ConfigurationWizard/ViewModel/GenericWizardPageViewModel.cs

// <copyright file="GenericWizardPageViewModel.cs" company="Microsoft Corporation">

// Copyright (c) Microsoft Corporation.  All rights reserved.

// </copyright>



namespace Microsoft.ServiceModel.Interop.ConfigurationWizard.ViewModel

{

    using System;

    using System.Collections.Generic;

    using System.Collections.ObjectModel;

    using System.Linq;

    using Microsoft.ServiceModel.Interop.ConfigurationWizard.Configuration;



    /// <summary>

    /// View model for a generic wizard page that gathers input information from the user

    /// </summary>

    public class GenericWizardPageViewModel : PageViewModelBase

    {

        private ObservableCollection<FieldModel> fields;



        /// <summary>

        /// Initializes a new instance of the GenericWizardPageViewModel class

        /// </summary>

        /// <param name="scenario">Scenario name</param>

        /// <param name="wizardPage">Wizard page settings</param>

        public GenericWizardPageViewModel(string scenario, interoperabilityWizardScenarioPage wizardPage)

        {

            if (wizardPage == null)

            {

                throw new ArgumentNullException("wizardPage");

            }



            if (string.IsNullOrEmpty(scenario))

            {

                throw new ArgumentNullException("scenario");

            }



            this.WizardPage = wizardPage;

            this.Subtitle = scenario;



            if (wizardPage.field != null)

            {

                this.fields = new ObservableCollection<FieldModel>(wizardPage.field

                    .Select(f => new FieldModel(f)));

            }

            else

            {

                this.fields = new ObservableCollection<FieldModel>();

            }



            this.Description = wizardPage.description;

        }



        /// <summary>

        /// Gets the page settings used for initializing the model

        /// </summary>

        public interoperabilityWizardScenarioPage WizardPage

        {

            get;

            private set;

        }



        /// <summary>

        /// Gets all the available fields for the page

        /// </summary>

        public IEnumerable<FieldModel> Fields

        {

            get { return this.fields; }

        }



        /// <summary>

        /// Gets the page title

        /// </summary>

        public override string DisplayName

        {

            get { return this.WizardPage.title; }

        }



        internal override bool IsValid()

        {

            return this.fields.All(f => f.CurrentOption != null

                || (!f.IsRequired || (f.IsRequired && !string.IsNullOrEmpty(f.FieldValue)))

                || (f.CurrentOption == null && f.HasSingleOption));

        }

    }

}