XpandPwsh

1.212.0.3

Cmdlets/src/XpandPwsh.Cmdlets/Nuget/Get-NugetPackageSearchMetadata.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Management.Automation;
using System.Reactive.Linq;
using System.Threading.Tasks;
using JetBrains.Annotations;
using NuGet.Protocol.Core.Types;
 
namespace XpandPwsh.Cmdlets.Nuget{
    [Cmdlet(VerbsCommon.Get, "NugetPackageSearchMetadata")]
    [CmdletBinding()]
    [CmdLetTag(CmdLetTag.Nuget,CmdLetTag.Reactive,CmdLetTag.RX)][PublicAPI]
    public class GetNugetPackageSearchMetadata : NugetCmdlet{
        [Parameter(Position = 0, ValueFromPipeline = true)]
        public string Name{ get; set; }
 
        [Parameter(Position = 1,Mandatory = true)]
        public string Source{ get; set; }
 
        [Parameter]
        public SwitchParameter IncludePrerelease{ get; set; } = new SwitchParameter(false);
 
 
        [Parameter]
        public SwitchParameter AllVersions{ get; set; } = new SwitchParameter(false);
 
        [Parameter]
        public string[] Versions{ get; set; }
        [Parameter]
        public SwitchParameter IncludeDelisted{ get; set; }
 
        protected override Task BeginProcessingAsync(){
            Versions = Versions?.Select(s => {
                var version = Version.Parse(s);
                var vString = $"{version.Major}.{version.Minor}.{version.Build}";
                if (version.Revision > 0){
                    vString += $".{version.Revision}";
                }
 
                return vString;
            }).ToArray();
            return base.BeginProcessingAsync();
        }
 
        protected override async Task ProcessRecordAsync(){
            if (Name == null && (Versions == null || !Versions.Any())){
                await Providers.ListPackages(Source, IncludeDelisted, AllVersions, IncludePrerelease)
                    .HandleErrors(this).WriteObject(this);
                return;
            }
            var listPackages = Name != null ? Observable.Return(Name)
                : Providers.ListPackages(Source, IncludeDelisted,false,IncludePrerelease).ToPackageObject().Select(_ => _.Id);
            var metaData = listPackages
                .SelectMany(package => SelectPackages(package, Providers))
                .Where(metadata => metadata!=null)
                .HandleErrors(this)
                .Distinct(new MetadataComparer()).Replay().AutoConnect();
            var searchMetadata = await metaData.DefaultIfEmpty();
             
            if (searchMetadata==null)
                return;
            var packageSearchMetadatas = metaData.ToEnumerable().ToArray()
                .OrderByDescending(_ => _.Identity.Version.Version).ToArray();
            if (!AllVersions && Versions == null){
                WriteObject(packageSearchMetadatas.OrderByDescending(metadata => metadata.Identity.Version.Version).FirstOrDefault());
                return;
            }
            foreach (var packageSearchMetadata in packageSearchMetadatas.Where(VersionMatch)){
                 
                WriteObject(packageSearchMetadata);
            }
        }
 
        private bool VersionMatch(IPackageSearchMetadata metadata){
            if (Versions == null||Versions.All(string.IsNullOrWhiteSpace))
                return true;
            return Versions.Contains(metadata.Identity.Version.ToString());
        }
 
        public class MetadataComparer : IEqualityComparer<IPackageSearchMetadata>{
            public bool Equals(IPackageSearchMetadata x, IPackageSearchMetadata y){
                return x?.Identity.Id == y?.Identity.Id && x?.Identity.Version.Version==y?.Identity.Version.Version;
            }
 
            public int GetHashCode(IPackageSearchMetadata obj){
                return $"{obj.Identity.Id}{obj.Identity.Version.Version}".GetHashCode();
            }
        }
 
        private IObservable<IPackageSearchMetadata> SelectPackages(string s, List<Lazy<INuGetResourceProvider>> providers){
            return Source.Split(';').ToObservable().SelectMany(source => providers.PackageMetadata(source, s,IncludeDelisted,IncludePrerelease));
        }
 
         
 
 
    }
}