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- # IsRedirectionLoopConfigured

  Followers 0

  VBScript → Lua

  This function returns True if the current script user has an unconditional redirection to a user configured, where the current call already has been (in his call routing).

  Please see the Introduction chapter for some usage instructions.

      '----------------------------------------------------------------
      ' IsRedirectionLoopConfigured
      '
      ' Checks if the undonditional redirection target of the script user is
      ' already in the PreviousScripts list, i.e. the call was previously already in that user's call routing.
      '
      ' Parameter:
      '
      ' Return:
      '   boolean
      '----------------------------------------------------------------
      Function IsRedirectionLoopConfigured
          PBXScript.OutputTrace "-------------> IsRedirectionLoopConfigured"

          Dim bReturn
          bReturn = False

          If PBXUser.UnconditionalRedirect Then

              Dim sRedirectToUser
              sRedirectToUser = GetUserNameFromExtension(PBXUser.UnconditionalRedirectNumber)

              Dim Script
              For Each Script In PBXScript.PreviousScripts

                  PBXScript.OutputTrace "Found user " & User.Name

                  If sRedirectToUser = Script.UserName Then
                      PBXScript.OutputTrace "Found redirection target in the PreviousScripts list. So this is most likely a loop!"
                      bReturn = True
                  End If

              Next

          End If

          IsRedirectionLoopConfigured = bReturn

          PBXScript.OutputTrace "bReturn = " & bReturn
          PBXScript.OutputTrace "<------------- IsRedirectionLoopConfigured"
      End Function

  This function makes use of the function GetUserNameFromExtension to get the username of the destination the current script user has an unconditional redirection configured to. Afterwards it uses the Server Script API function PBXScript.PreviousScripts to search the username in the list of previous call routing scripts.

  Once this function returns true the idea is to disabled the unconditional redirection to prevent a loop.

      If IsRedirectionLoopConfigured Then
          PBXUser.UnconditionalRedirect = False
      End If

  There is another function IsLoopConfigured available, following another approach to identify an existing call loop.

  Please take a look into the How to avoid loops topic for more details.

  This function was initially posted into this forum topic.

  By Tom Wellige

  - June 5, 2022
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