Simplify release install process

Fix install on startup

src/Artemis.Storage/Entities/General/ReleaseEntity.cs

@@ -7,15 +7,5 @@ public class ReleaseEntity
     public Guid Id { get; set; }
     
     public string Version { get; set; }
-    public string ReleaseId { get; set; }
-    public ReleaseEntityStatus Status { get; set; }
     public DateTimeOffset? InstalledAt { get; set; }
-}
-
-public enum ReleaseEntityStatus
-{
-    Queued,
-    Installed,
-    Historical,
-    Unknown
 }

src/Artemis.Storage/Repositories/ReleaseRepository.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Collections.Generic;
 using Artemis.Storage.Entities.General;
 using Artemis.Storage.Repositories.Interfaces;
 using LiteDB;
@@ -14,63 +13,25 @@ public class ReleaseRepository : IReleaseRepository
     {
         _repository = repository;
         _repository.Database.GetCollection<ReleaseEntity>().EnsureIndex(s => s.Version, true);
-        _repository.Database.GetCollection<ReleaseEntity>().EnsureIndex(s => s.Status);
     }
 
-    public ReleaseEntity GetQueuedVersion()
+    public void SaveVersionInstallDate(string version)
     {
-        return _repository.Query<ReleaseEntity>().Where(r => r.Status == ReleaseEntityStatus.Queued).FirstOrDefault();
-    }
+        ReleaseEntity release = _repository.Query<ReleaseEntity>().Where(r => r.Version == version).FirstOrDefault();
+        if (release != null)
+            return;
 
-    public ReleaseEntity GetInstalledVersion()
-    {
-        return _repository.Query<ReleaseEntity>().Where(r => r.Status == ReleaseEntityStatus.Installed).FirstOrDefault();
+        _repository.Insert(new ReleaseEntity {Version = version, InstalledAt = DateTimeOffset.UtcNow});
     }
 
     public ReleaseEntity GetPreviousInstalledVersion()
     {
-        return _repository.Query<ReleaseEntity>().Where(r => r.Status == ReleaseEntityStatus.Historical).OrderByDescending(r => r.InstalledAt).FirstOrDefault();
-    }
-
-    public void QueueInstallation(string version, string releaseId)
-    {
-        // Mark release as queued and add if missing
-        ReleaseEntity release = _repository.Query<ReleaseEntity>().Where(r => r.Version == version).FirstOrDefault() ?? new ReleaseEntity {Version = version, ReleaseId = releaseId};
-        release.Status = ReleaseEntityStatus.Queued;
-        _repository.Upsert(release);
-    }
-
-    public void FinishInstallation(string version)
-    {
-        // Mark release as installed and add if missing
-        ReleaseEntity release = _repository.Query<ReleaseEntity>().Where(r => r.Version == version).FirstOrDefault() ?? new ReleaseEntity {Version = version};
-        release.Status = ReleaseEntityStatus.Installed;
-        release.InstalledAt = DateTimeOffset.UtcNow;
-        _repository.Upsert(release);
-
-        // Mark other releases as historical
-        List<ReleaseEntity> oldReleases = _repository.Query<ReleaseEntity>().Where(r => r.Version != version && r.Status != ReleaseEntityStatus.Historical).ToList();
-        foreach (ReleaseEntity oldRelease in oldReleases)
-            oldRelease.Status = ReleaseEntityStatus.Historical;
-        _repository.Update<ReleaseEntity>(oldReleases);
-    }
-
-    public void DequeueInstallation()
-    {
-        // Mark all queued releases as unknown, until FinishInstallation is called we don't know the status
-        List<ReleaseEntity> queuedReleases = _repository.Query<ReleaseEntity>().Where(r => r.Status == ReleaseEntityStatus.Queued).ToList();
-        foreach (ReleaseEntity queuedRelease in queuedReleases)
-            queuedRelease.Status = ReleaseEntityStatus.Unknown;
-        _repository.Update<ReleaseEntity>(queuedReleases);
+        return _repository.Query<ReleaseEntity>().OrderByDescending(r => r.InstalledAt).Skip(1).FirstOrDefault();
     }
 }
 
 public interface IReleaseRepository : IRepository
 {
-    ReleaseEntity GetQueuedVersion();
-    ReleaseEntity GetInstalledVersion();
+    void SaveVersionInstallDate(string version);
     ReleaseEntity GetPreviousInstalledVersion();
-    void QueueInstallation(string version, string releaseId);
-    void FinishInstallation(string version);
-    void DequeueInstallation();
 }