IsRedirectionLoopConfigured

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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Function Collection (VBScript)

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IsRedirectionLoopConfigured

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