Imports System.IO
Imports System.Security.Principal
Public Class frmMain1

    Private Plugins() As PluginServices.AvailablePlugin
    Private objHost As EDOKA_PluginLib.IHost
    Dim users As New DataSet
    Dim userrechte As Integer
    Dim onload As Boolean = True

    Private Sub PopulatePluginList()
        Dim objPlugin As EDOKA_PluginLib.IPlugin
        Dim intIndex As Integer
        lstPlugins.Items.Add("Funktion wählen:")
        'Loop through available plugins, creating instances and adding them to listbox
        For intIndex = 0 To Plugins.Length - 1
            objPlugin = DirectCast(PluginServices.CreateInstance(Plugins(intIndex)), EDOKA_PluginLib.IPlugin)
            lstPlugins.Items.Add(objPlugin.Name)
        Next

        lstPlugins.SelectedIndex = 0
    End Sub

    Private Sub BeendenToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles BeendenToolStripMenuItem.Click
        Me.Close()
    End Sub

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        If check_user() = False Then End

        If userrechte = 1 Then BeendenToolStripMenuItem.Visible = True Else BenutzerverwaltungToolStripMenuItem.Visible = False
        Plugins = PluginServices.FindPlugins(Path.GetDirectoryName(Application.ExecutablePath), "EDOKA_PluginLib.IPlugin")
        If Plugins Is Nothing Then
            MessageBox.Show("No plugins found!", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Stop)
            Exit Sub
        End If
        PopulatePluginList()
        onload = False
    End Sub

    Private Sub lstPlugins_SelectedIndexChanged(sender As Object, e As EventArgs) Handles lstPlugins.SelectedIndexChanged
        Cursor = Cursors.WaitCursor
        Dim objPlugin As EDOKA_PluginLib.IPlugin
        Dim dblResult As Double
        Try
            'Create and initialize plugin
            objPlugin = DirectCast(PluginServices.CreateInstance(Plugins(lstPlugins.SelectedIndex - 1)), EDOKA_PluginLib.IPlugin)
            objPlugin.Initialize(objHost)
        Catch ex As Exception
            Cursor = Cursors.Default
            Exit Sub
        End Try

        'Run calculation and return result
        Try
            objPlugin.Show(Globals.Mitarbeiternr, "", Me)
        Catch ex As Exception
            Cursor = Cursors.Default
            MessageBox.Show("Error " + ex.Message, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
            Exit Sub
        End Try
        Cursor = Cursors.Default
    End Sub

    Dim ouser As New WindowsPrincipal(WindowsIdentity.GetCurrent)
    ''' <summary>
    ''' Windows-User auslesen
    ''' </summary>
    ''' <returns></returns>
    ''' <remarks></remarks>
    Private Function Get_Username() As String
        With ouser.Identity.Name
            Return (.Substring(.IndexOf("\") + 1))
        End With
    End Function

#Region "Tools"
    Sub create_usertable(ByVal username As String)
        Dim ds As New DataSet
        ds.Tables.Add("Users")
        ds.Tables(0).Columns.Add("TGNummer")
        ds.Tables(0).Columns.Add("Rolle")
        ds.Tables(0).Columns.Add("EDOKA_MA_Nr")
        Dim dr As DataRow = ds.Tables(0).NewRow
        dr.Item(0) = Crypto.EncryptText(username, "Selbstanzeigen")
        dr.Item(1) = 1
        dr.Item(2) = 0
        ds.Tables(0).Rows.Add(dr)
        ds.WriteXml(Application.StartupPath + "\users.xml")
    End Sub

    Function check_user() As Boolean
        Dim user As String = Get_Username()
        If Not System.IO.File.Exists(Application.StartupPath + "\users.xml") Then
            MsgBox("User-Datenbank ist nicht vorhanden und wird neu erstellt", MsgBoxStyle.Critical)
            Dim s As String = InputBox("Geben Sie das Passwort ein:")
            If s <> "edokatools" Then
                Return False
            End If
            create_usertable(user)
            Return False
        End If

        Globals.Userdata.ReadXml(Application.StartupPath + "\users.xml")
        For Each dr As DataRow In Globals.Userdata.Tables(0).Rows
            dr.Item(0) = Crypto.DecryptText(dr.Item(0).ToString, "Selbstanzeigen")
        Next

        userrechte = -1
        For Each dr As DataRow In Globals.Userdata.Tables(0).Rows
            If UCase(user) = UCase(dr.Item(0)) Then
                If dr.Item(1) = 1 Then userrechte = 1 Else userrechte = 0
                Globals.Mitarbeiternr = dr.Item(2)
                Globals.tgnummer = user
                Exit For
            End If
        Next
        If userrechte = -1 Then
            MsgBox("Sie sind nicht berechtig, die Applikation zu verwenden.", MsgBoxStyle.Exclamation)
            Return False
        End If
        Return True


    End Function
#End Region

    Private Sub BenutzerverwaltungToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles BenutzerverwaltungToolStripMenuItem.Click
        Dim f As New frmBenutzer
        f.MdiParent = Me
        f.Show()
    End Sub
End Class