xenadmin/XenAdmin/Diagnostics/Hotfixing/HotfixFactory.cs

/* Copyright (c) Citrix Systems, Inc. 
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 *     following disclaimer. 
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using System;
using XenAdmin.Core;
using XenAPI;

namespace XenAdmin.Diagnostics.Hotfixing
{
    internal sealed class HotfixFactory
    {
        public enum HotfixableServerVersion
        {
            Dundee,
            ElyLima,
            Naples
        }

        private readonly Hotfix dundeeHotfix = new SingleHotfix
        {
            Filename = "RPU003",
            UUID = "b651dd22-df7d-45a4-8c0a-6be037bc1714"
        };

        private readonly Hotfix elyLimaHotfix = new SingleHotfix
        {
            Filename = "RPU004",
            UUID = "1821854d-0171-4696-a9c4-01daf75a45a0"
        };

        private readonly Hotfix naplesHotfix = new SingleHotfix
        {
            Filename = "RPU005",
            UUID = "b43ea62d-2804-4589-9164-f6cc5867d011"
        };

        public Hotfix Hotfix(Host host)
        {
            if (Helpers.NaplesOrGreater(host) && !Helpers.QuebecOrGreater(host))
                return Hotfix(HotfixableServerVersion.Naples);
            if (Helpers.ElyOrGreater(host) && !Helpers.NaplesOrGreater(host))
                return Hotfix(HotfixableServerVersion.ElyLima);
            if (Helpers.DundeeOrGreater(host) && !Helpers.ElyOrGreater(host))
                return Hotfix(HotfixableServerVersion.Dundee);
            return null;
        }

        public Hotfix Hotfix(HotfixableServerVersion version)
        {
            if (version == HotfixableServerVersion.Naples)
                return naplesHotfix;
            if (version == HotfixableServerVersion.ElyLima)
                return elyLimaHotfix;
            if (version == HotfixableServerVersion.Dundee)
                return dundeeHotfix;

            throw new ArgumentException("A version was provided for which there is no hotfix filename");
        }

        public bool IsHotfixRequired(Host host)
        {
            return Hotfix(host) != null;
        }
    }
}