UFN_SECURITY_APPUSER_GRANTED_BATCHPROCESSOR

CREATE function dbo.UFN_SECURITY_APPUSER_GRANTED_BATCHPROCESSOR
(@APPUSERID uniqueidentifier,@BATCHTEMPLATEID uniqueidentifier)
returns bit
as
/*
Returns true if user has been granted and not denied rights for data entry to the batch for a system role.
*/
begin
    --If at least one grant and no deny then return true

    --otherwise, false

    declare @grant bit;
    set @grant=0;

    select @grant = ISSYSADMIN from dbo.APPUSER where ID = @APPUSERID;

    if @grant = 0
        begin
            --order by GRANTORDENY, deny will be first.                

            select 
                top 1 @grant=SECURITYVIEW.GRANTORDENY
            from 
                dbo.V_SECURITY_SYSTEMROLEASSIGNMENT_USER_BATCHWORKFLOWSTATE SECURITYVIEW
                with (NOEXPAND, INDEX(IX_V_SECURITY_SYSTEMROLEASSIGNMENT_USER_BATCHWORKFLOWSTATE_BATCHWORKFLOWSTATEID_APPUSERID))                    
            inner join 
                dbo.BATCHWORKFLOWSTATE on SECURITYVIEW.BATCHWORKFLOWSTATEID = BATCHWORKFLOWSTATE.ID
            inner join 
                dbo.BATCHTEMPLATE on BATCHTEMPLATE.BATCHWORKFLOWID = BATCHWORKFLOWSTATE.BATCHWORKFLOWID
            where 
                SECURITYVIEW.APPUSERID = @APPUSERID
            and 
                BATCHTEMPLATE.ID=@BATCHTEMPLATEID 
            and 
                BATCHWORKFLOWSTATE.ISINITIALSTATE = 1
            and
                ((BATCHTEMPLATE.SITEID is null) or (dbo.UFN_SITEALLOWEDFORUSERONFEATURE(@APPUSERID, BATCHTEMPLATE.SITEID, @BATCHTEMPLATEID, 25) = 1))
            order by 
                SECURITYVIEW.GRANTORDENY ASC;                    

            if @@ROWCOUNT = 0 
                begin
                    select 
                        top 1 @grant=SECURITYVIEW.GRANTORDENY
                    from 
                        dbo.V_SECURITY_SYSTEMROLEASSIGNMENT_USER_BATCHTEMPLATE SECURITYVIEW
                        with (NOEXPAND, INDEX(IX_V_SECURITY_SYSTEMROLEASSIGNMENT_USER_BATCHTEMPLATE_BATCHTEMPLATEID_APPUSERID))
                    inner join
                        dbo.BATCHTEMPLATE on SECURITYVIEW.BATCHTEMPLATEID = BATCHTEMPLATE.ID
                    where 
                        SECURITYVIEW.APPUSERID = @APPUSERID
                    and 
                        SECURITYVIEW.BATCHTEMPLATEID=@BATCHTEMPLATEID
                    and
                        ((BATCHTEMPLATE.SITEID is null) or (dbo.UFN_SITEALLOWEDFORUSERONFEATURE(@APPUSERID, BATCHTEMPLATE.SITEID, @BATCHTEMPLATEID, 25) = 1))
                    order by 
                        SECURITYVIEW.GRANTORDENY ASC;
                end

            if @@ROWCOUNT = 0 
                begin
                    select 
                        top 1 @grant=SECURITYVIEW.GRANTORDENY
                    from 
                        dbo.V_SECURITY_SYSTEMROLEASSIGNMENT_USER_BATCHTYPE SECURITYVIEW
                    inner join 
                        dbo.BATCHTEMPLATE on BATCHTEMPLATE.BATCHTYPECATALOGID = SECURITYVIEW.BATCHTYPECATALOGID                                
                    where 
                        SECURITYVIEW.APPUSERID = @APPUSERID
                    and 
                        BATCHTEMPLATE.ID=@BATCHTEMPLATEID
                    and
                        ((BATCHTEMPLATE.SITEID is null) or (dbo.UFN_SITEALLOWEDFORUSERONFEATURE(@APPUSERID, BATCHTEMPLATE.SITEID, @BATCHTEMPLATEID, 25) = 1))
                    order by 
                        SECURITYVIEW.GRANTORDENY ASC;
                end
        end

    return @grant;

end