use new system via an update info

ModpackUpdater/Form1.vb

@@ -8,6 +8,7 @@ Public Class Form1
 
     Private updateConfig As New UpdateConfig
     Private currentUpdating As Boolean = False
+    Private lastUpdateCheckResult As UpdateCheckResult = Nothing
 
     Public Sub New()
         InitializeComponent()
@@ -75,42 +76,43 @@ Public Class Form1
         End If
     End Sub
 
-    Private Async Function ExecuteUpdate(allowInstall As Boolean) As Task
-        SetStatus(LangRes.StatusText_CheckingForUpdates, MySymbols.icons8_update_16px)
-
+    Private Async Function ExecuteUpdate(doInstall As Boolean) As Task
         Dim updater As New UpdateInstaller(updateConfig, GetMinecraftProfilePath)
         AddHandler updater.InstallProgessUpdated, AddressOf Update_InstallProgessUpdated
         AddHandler updater.CheckingProgressUpdated, AddressOf Updated_CheckingProgresssUpdated
 
-        Dim result As UpdateCheckResult = Await updater.CheckForUpdates(Not AppConfig.Instance.AllowRemoveLocalFiles)
-        Dim everytingOk As Boolean = False
+        'Check only if not pressed "install", not really needed otherwise.
+        If lastUpdateCheckResult Is Nothing OrElse Not doInstall Then
+            SetStatus(LangRes.StatusText_CheckingForUpdates, MySymbols.icons8_update_16px)
+            lastUpdateCheckResult = Await updater.CheckForUpdates(Not AppConfig.Instance.AllowRemoveLocalFiles)
+        End If
 
-        If result Is Nothing Then
+        If lastUpdateCheckResult Is Nothing OrElse lastUpdateCheckResult.HasError Then
             SetStatus(LangRes.StatusText_ErrorWhileUpdateCheckOrUpdate, MySymbols.icons8_delete_16px)
-        ElseIf result.HasUpdates Then
-            SetStatus(LangRes.StatusText_UpdateAvailable, MySymbols.icons8_software_installer_16px)
-
-            If allowInstall Then
-                currentUpdating = True
+        ElseIf lastUpdateCheckResult.HasUpdates Then
+            If doInstall Then
                 SetStatus(LangRes.StatusText_Installing, MySymbols.icons8_software_installer_16px)
+                currentUpdating = True
 
-                If Await updater.InstallUpdates(result) Then
-                    everytingOk = True
+                If Await updater.InstallUpdates(lastUpdateCheckResult) Then
+                    lastUpdateCheckResult = Nothing 'Reset last update check, a new one would be needed now.
+                    SetStatus(LangRes.StatusTest_EverythingOk, MySymbols.icons8_checkmark_16px)
+                Else
+                    SetStatus(LangRes.StatusText_ErrorWhileUpdateCheckOrUpdate, MySymbols.icons8_delete_16px)
                 End If
 
                 currentUpdating = False
+            Else
+                SetStatus(LangRes.StatusText_UpdateAvailable, MySymbols.icons8_software_installer_16px)
             End If
         Else
-            everytingOk = True
-        End If
-
-        If everytingOk Then
             SetStatus(LangRes.StatusTest_EverythingOk, MySymbols.icons8_checkmark_16px)
         End If
     End Function
 
     Private Sub Update_InstallProgessUpdated(result As UpdateCheckResult, processedSyncs As Integer)
-        SetStatus(Math.Round(processedSyncs / result.SyncFiles.Count * 100, 1) & "%", MySymbols.icons8_software_installer_16px)
+        Dim actionCount = If(result.IsLegacy, result.SyncFiles.Count, result.UpdateActions.Count)
+        SetStatus(Math.Round(processedSyncs / actionCount * 100, 1) & "%", MySymbols.icons8_software_installer_16px)
     End Sub
 
     Private Sub Updated_CheckingProgresssUpdated(toCheck As Integer, processed As Integer)

ModpackUpdater/ModpackInfo.vb

@@ -0,0 +1,30 @@
+Imports System.IO
+
+Imports Newtonsoft.Json
+Imports Newtonsoft.Json.Converters
+Imports Newtonsoft.Json.Linq
+
+Public Class ModpackInfo
+
+    Private Const FILENAME_MODPACKINFO = "modpack-info.json"
+
+    <JsonConverter(GetType(VersionConverter))>
+    Public Property Version As Version
+
+    Public Sub Save(mcRoot As String)
+        File.WriteAllText(GetFilePath(mcRoot), JObject.FromObject(Me).ToString)
+    End Sub
+
+    Public Shared Function Load(mcRoot As String) As ModpackInfo
+        Return JObject.Parse(File.ReadAllText(GetFilePath(mcRoot))).ToObject(Of ModpackInfo)
+    End Function
+
+    Public Shared Function HasModpackInfo(mcRoot As String) As Boolean
+        Return File.Exists(GetFilePath(mcRoot))
+    End Function
+
+    Private Shared Function GetFilePath(mcRoot As String)
+        Return Path.Combine(mcRoot, FILENAME_MODPACKINFO)
+    End Function
+
+End Class

ModpackUpdater/UpdateAction.vb

@@ -0,0 +1,12 @@
+Imports Newtonsoft.Json
+Imports Newtonsoft.Json.Converters
+
+Public Class UpdateAction
+
+    <JsonConverter(GetType(StringEnumConverter))>
+    Public Property Type As UpdateActionType
+    Public Property DestPath As String
+    Public Property SrcPath As String
+    Public Property DownloadUrl As String
+
+End Class

ModpackUpdater/UpdateActionType.vb

@@ -0,0 +1,7 @@
+Public Enum UpdateActionType
+    None
+    Update
+    Delete
+    Move
+    Copy
+End Enum

ModpackUpdater/UpdateCheckResult.vb

@@ -1,10 +1,20 @@
 Public Class UpdateCheckResult
 
+    Public Property IsLegacy As Boolean
     Public ReadOnly Property SyncFiles As New List(Of UpdateSyncFile)
 
+    Public Property CurrentVersion As Version
+    Public Property LatestVersion As Version
+    Public ReadOnly Property UpdateActions As New List(Of UpdateAction)
+    Public Property HasError As Boolean
+
     Public ReadOnly Property HasUpdates As Boolean
         Get
+            If IsLegacy Then
                 Return SyncFiles.Where(Function(n) n.SyncAction <> UpdateSyncAction.None).Any
+            Else
+                Return CurrentVersion < LatestVersion
+            End If
         End Get
     End Property
 

ModpackUpdater/UpdateConfig.vb

@@ -6,6 +6,7 @@ Imports Pilz.Cryptography
 
 Public Class UpdateConfig
 
+    Public Property UpdateUrl As String
     Public Property WebdavURL As SecureString
     Public Property WebdavUsername As SecureString
     Public Property WebdavPassword As SecureString
@@ -14,7 +15,7 @@ Public Class UpdateConfig
         File.WriteAllText(filePath, JObject.FromObject(Me).ToString)
     End Sub
 
-    Public Shared Function LoadFromFile(filePath As string)
+    Public Shared Function LoadFromFile(filePath As String) As UpdateConfig
         Return JObject.Parse(File.ReadAllText(filePath)).ToObject(Of UpdateConfig)
     End Function
 

ModpackUpdater/UpdateInfo.vb

@@ -0,0 +1,10 @@
+Imports Newtonsoft.Json
+Imports Newtonsoft.Json.Converters
+
+Public Class UpdateInfo
+
+    <JsonConverter(GetType(VersionConverter))>
+    Public Property Version As Version
+    Public ReadOnly Property Actions As New List(Of UpdateAction)
+
+End Class

ModpackUpdater/UpdateInfos.vb

@@ -0,0 +1,11 @@
+Imports Newtonsoft.Json.Linq
+
+Public Class UpdateInfos
+
+    Public ReadOnly Property Updates As New List(Of UpdateInfo)
+
+    Public Shared Function Parse(content As String) As UpdateInfos
+        Return JObject.Parse(content).ToObject(Of UpdateInfos)
+    End Function
+
+End Class

ModpackUpdater/UpdateInstaller.vb

@@ -1,5 +1,6 @@
 Imports System.IO
 Imports System.Net
+Imports System.Net.Http
 
 Imports WebDav
 
@@ -11,12 +12,18 @@ Public Class UpdateInstaller
     Private ReadOnly updateConfig As UpdateConfig
     Private ReadOnly localPath As String
     Private webdavClient As WebDavClient = Nothing
+    Private httpClient As New HttpClient
 
     Public Sub New(updateConfig As UpdateConfig, localPath As String)
         Me.updateConfig = updateConfig
         Me.localPath = localPath
     End Sub
 
+    Protected Overrides Sub Finalize()
+        httpClient.Dispose()
+        MyBase.Finalize()
+    End Sub
+
     Private Function CreateClient() As WebDavClient
         If webdavClient Is Nothing Then
             Dim params As New WebDavClientParams With {
@@ -29,13 +36,57 @@ Public Class UpdateInstaller
         Return webdavClient
     End Function
 
+    Private Async Function DownloadUpdateInfos() As Task(Of UpdateInfos)
+        Dim content As String = Await httpClient.GetStringAsync(updateConfig.UpdateUrl)
+        Return UpdateInfos.Parse(content)
+    End Function
+
     Public Async Function CheckForUpdates(ignoreRevmoedFiles As Boolean) As Task(Of UpdateCheckResult)
+        Dim infos As UpdateInfos = Await DownloadUpdateInfos()
         Dim result As New UpdateCheckResult
+
+        If infos IsNot Nothing AndAlso infos.Updates.Any Then
+            Dim updatesOrderes = infos.Updates.OrderByDescending(Function(n) n.Version)
+            result.LatestVersion = updatesOrderes.First.Version
+
+            If ModpackInfo.HasModpackInfo(localPath) Then
+                Dim modpackInfo As ModpackInfo = ModpackInfo.Load(localPath)
+                result.CurrentVersion = modpackInfo.Version
+
+                Dim checkingVersionIndex As Integer = 0
+                Dim checkingVersion As UpdateInfo = updatesOrderes(checkingVersionIndex)
+
+                Do While checkingVersion IsNot Nothing AndAlso checkingVersion.Version > result.CurrentVersion
+                    Dim actionsToAdd As New List(Of UpdateAction)
+
+                    For Each action In checkingVersion.Actions
+                        If Not result.UpdateActions.Any(Function(n) n.DestPath = action.DestPath) Then
+                            actionsToAdd.Add(action)
+                        End If
+                    Next
+
+                    result.UpdateActions.InsertRange(0, actionsToAdd)
+
+                    checkingVersionIndex += 1
+                    checkingVersion = updatesOrderes.ElementAtOrDefault(checkingVersionIndex)
+                Loop
+            Else
+                Await CheckForUpdatesLegacy(result, ignoreRevmoedFiles)
+            End If
+        End If
+
+        Return result
+    End Function
+
+    Private Async Function CheckForUpdatesLegacy(result As UpdateCheckResult, ignoreRevmoedFiles As Boolean) As Task
         Dim client As WebDavClient = CreateClient()
         Dim resTopFolder As WebDavResource = Nothing
         Dim checkedFiles = New List(Of String)()
         Dim responseSuccessfull As Boolean = False
 
+        result.CurrentVersion = New Version("0.0.0.0")
+        result.IsLegacy = True
+
         'Check for new & updated files
         Dim response = Await client.Propfind(String.Empty, New PropfindParameters() With {.ApplyTo = ApplyTo.Propfind.ResourceAndAncestors})
         If resTopFolder Is Nothing AndAlso response.IsSuccessful AndAlso response.Resources.Any() Then
@@ -101,11 +152,64 @@ Public Class UpdateInstaller
                 End If
             Next
         End If
-
-        Return result
     End Function
 
     Public Async Function InstallUpdates(checkResult As UpdateCheckResult, Optional ignoreActions As UpdateSyncAction = UpdateSyncAction.None) As Task(Of Boolean?)
+        Dim isSuccessfully As Boolean
+        Dim modpackInfo As ModpackInfo
+
+        If ModpackInfo.HasModpackInfo(localPath) Then
+            modpackInfo = ModpackInfo.Load(localPath)
+        Else
+            modpackInfo = New ModpackInfo
+        End If
+
+        If checkResult.IsLegacy Then
+            isSuccessfully = Await InstallUpdatesLegacy(checkResult, ignoreActions)
+        Else
+            Dim processed As Integer = 0
+            For Each action As UpdateAction In checkResult.UpdateActions
+                Dim destFilePath As String = Path.Combine(localPath, action.DestPath)
+
+                Select Case action.Type
+                    Case UpdateActionType.Update
+                        Dim sRemote As Stream = Await httpClient.GetStreamAsync(action.DownloadUrl)
+                        Dim fs As New FileStream(destFilePath, FileMode.Create, FileAccess.ReadWrite)
+                        Await sRemote.CopyToAsync(fs)
+                        sRemote.Close()
+                        fs.Close()
+                    Case UpdateActionType.Delete
+                        If File.Exists(destFilePath) Then
+                            File.Delete(destFilePath)
+                        End If
+                    Case UpdateActionType.Copy
+                        Dim srcFilePath As String = Path.Combine(localPath, action.SrcPath)
+                        If File.Exists(srcFilePath) Then
+                            File.Copy(srcFilePath, destFilePath, True)
+                        End If
+                    Case UpdateActionType.Move
+                        Dim srcFilePath As String = Path.Combine(localPath, action.SrcPath)
+                        If File.Exists(srcFilePath) Then
+                            File.Move(srcFilePath, destFilePath, True)
+                        End If
+                End Select
+
+                processed += 1
+                RaiseEvent InstallProgessUpdated(checkResult, processed)
+            Next
+
+            isSuccessfully = True
+        End If
+
+        If isSuccessfully Then
+            modpackInfo.Version = checkResult.LatestVersion
+            modpackInfo.Save(localPath)
+        End If
+
+        Return isSuccessfully
+    End Function
+
+    Private Async Function InstallUpdatesLegacy(checkResult As UpdateCheckResult, Optional ignoreActions As UpdateSyncAction = UpdateSyncAction.None) As Task(Of Boolean?)
         Dim client As WebDavClient = CreateClient()
         Dim success As Boolean? = False
         Dim processed As Integer = 0