From c022872832d9f2369514ee081fa827e275a6c149 Mon Sep 17 00:00:00 2001
From: Jonathan Jenne <j.jenne@digitaldata.works>
Date: Thu, 20 May 2021 16:13:16 +0200
Subject: [PATCH] EDMIAPI: Add DataWithFallback

---
 Modules.EDMIAPI/DataWithFallback.vb          | 92 ++++++++++++++++++++
 Modules.EDMIAPI/DataWithFallback/UserData.vb | 14 +++
 Modules.EDMIAPI/EDMI.API.vbproj              | 10 +++
 3 files changed, 116 insertions(+)
 create mode 100644 Modules.EDMIAPI/DataWithFallback.vb
 create mode 100644 Modules.EDMIAPI/DataWithFallback/UserData.vb

diff --git a/Modules.EDMIAPI/DataWithFallback.vb b/Modules.EDMIAPI/DataWithFallback.vb
new file mode 100644
index 00000000..7f2ea153
--- /dev/null
+++ b/Modules.EDMIAPI/DataWithFallback.vb
@@ -0,0 +1,92 @@
+Imports DigitalData.Modules.Database
+Imports DigitalData.Modules.EDMI.API
+Imports DigitalData.Modules.EDMI.API.EDMIServiceReference
+Imports DigitalData.Modules.Logging
+Imports DigitalData.Modules.Language.Utils
+
+Public Class DataWithFallback
+    Private _Logger As Logger
+    Private _Client As Client
+    Private _DatabaseEDM As MSSQLServer
+    Private _DatabaseIDB As MSSQLServer
+    Private _Type As DatabaseType
+
+    Public Enum DatabaseType
+        ECM
+        IDB
+    End Enum
+
+    Public Sub New(LogConfig As LogConfig, Client As Client, DatabaseECM As MSSQLServer, DatabaseIDB As MSSQLServer)
+        _Logger = LogConfig.GetLogger()
+        _Client = Client
+        _DatabaseEDM = DatabaseECM
+        _DatabaseIDB = DatabaseIDB
+    End Sub
+
+    Public Function GetDatatable(DataTable As String, FilterExpression As String, SortByColumn As String, FallbackSQL As String, FallbackType As DatabaseType, Optional ForceFallback As Boolean = False) As DataTable
+        Try
+            Dim oResult As DataTable = Nothing
+
+            If ForceFallback = False Then
+                Dim oTableResult As TableResult = _Client.GetDatatableByName(DataTable, FilterExpression, SortByColumn)
+
+                If oTableResult Is Nothing OrElse oTableResult.OK = False Then
+                    _Logger.Warn("Datatable [{0}] could not be fetched from AppServer Cache. Falling back to direct Database Access.")
+                End If
+
+                Return oTableResult.Table
+            Else
+                Return GetDatatableFromDatabase(FallbackSQL, FallbackType)
+            End If
+        Catch ex As Exception
+            _Logger.Error(ex)
+            Return Nothing
+        End Try
+    End Function
+
+    Private Function GetDatatableFromDatabase(SQLCommand As String, DatabaseType As DatabaseType)
+        Try
+            Select Case DatabaseType
+                Case DatabaseType.ECM
+                    Return _DatabaseEDM.GetDatatable(SQLCommand)
+
+                Case DatabaseType.IDB
+                    Return _DatabaseIDB.GetDatatable(SQLCommand)
+
+                Case Else
+                    Return Nothing
+
+            End Select
+        Catch ex As Exception
+            _Logger.Error(ex)
+            Return Nothing
+
+        End Try
+    End Function
+
+    Public Function GetUserData(UserName As String, ModuleCode As String, Client As Integer) As UserData
+        Dim oSQL = $"SELECT * FROM FNDD_CHECK_USER_MODULE('{UserName}','{ModuleCode}',{Client})"
+        Dim oTable As DataTable = GetDatatable("TBDD_USER_MODULE", $"USERNAME = '{UserName.ToLower}' AND MODULE_SHORT = '{ModuleCode}'", "", oSQL, DatabaseType.ECM)
+
+        If oTable Is Nothing Then
+            Return Nothing
+        End If
+
+        If oTable.Rows.Count = 0 Then
+            Return Nothing
+        End If
+
+        Dim oRow As DataRow = oTable.Rows.Item(0)
+        Dim oUserData As New UserData With {
+            .Id = NotNull(oRow, "USER_ID", -1),
+            .Surname = NotNull(oRow, "USER_SURNAME", String.Empty),
+            .Prename = NotNull(oRow, "USER_PRENAME", String.Empty),
+            .Shortname = NotNull(oRow, "USER_SHORTNAME", String.Empty),
+            .Email = NotNull(oRow, "USER_EMAIL", String.Empty),
+            .Language = NotNull(oRow, "USER_LANGUAGE", "de-DE"),
+            .DateFormat = NotNull(oRow, "USER_DATE_FORMAT", "dd.MM.yyyy")
+        }
+    End Function
+
+End Class
+
diff --git a/Modules.EDMIAPI/DataWithFallback/UserData.vb b/Modules.EDMIAPI/DataWithFallback/UserData.vb
new file mode 100644
index 00000000..ae8e6120
--- /dev/null
+++ b/Modules.EDMIAPI/DataWithFallback/UserData.vb
@@ -0,0 +1,14 @@
+Public Class UserData
+    Public Id As Integer
+    Public Surname As String
+    Public Prename As String
+    Public Shortname As String
+    Public Email As String
+    Public Language As String
+    Public DateFormat As String
+
+    Public IsAdmin As Boolean
+    Public HasAccess As Boolean
+
+    Public ModuleName As String
+End Class
diff --git a/Modules.EDMIAPI/EDMI.API.vbproj b/Modules.EDMIAPI/EDMI.API.vbproj
index b81b7d70..5f7dbe71 100644
--- a/Modules.EDMIAPI/EDMI.API.vbproj
+++ b/Modules.EDMIAPI/EDMI.API.vbproj
@@ -80,6 +80,7 @@
       <DependentUpon>Reference.svcmap</DependentUpon>
     </Compile>
     <Compile Include="Client.vb" />
+    <Compile Include="DataWithFallback.vb" />
     <Compile Include="My Project\AssemblyInfo.vb" />
     <Compile Include="My Project\Application.Designer.vb">
       <AutoGen>True</AutoGen>
@@ -95,6 +96,7 @@
       <DependentUpon>Settings.settings</DependentUpon>
       <DesignTimeSharedInput>True</DesignTimeSharedInput>
     </Compile>
+    <Compile Include="DataWithFallback\UserData.vb" />
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="My Project\Resources.resx">
@@ -175,6 +177,14 @@
     <WCFMetadata Include="Connected Services\" />
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\Modules.Database\Database.vbproj">
+      <Project>{eaf0ea75-5fa7-485d-89c7-b2d843b03a96}</Project>
+      <Name>Database</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Modules.Language\Language.vbproj">
+      <Project>{d3c8cfed-d6f6-43a8-9bdf-454145d0352f}</Project>
+      <Name>Language</Name>
+    </ProjectReference>
     <ProjectReference Include="..\Modules.Logging\Logging.vbproj">
       <Project>{903b2d7d-3b80-4be9-8713-7447b704e1b0}</Project>
       <Name>Logging</Name>