HLOTLNK ;IRMFO-ALB/CJM - APIs for the HL Logical Link file;03/24/2004  14:43 ;1/23/07  16:59
 ;;1.6;HEALTH LEVEL SEVEN;**126,130,131,135**;Oct 13, 1995;Build 10
 ; Modified from FOIA VISTA,
 ; Copyright (C) 2007 WorldVistA
 ;
 ; This program is free software; you can redistribute it and/or modify
 ; it under the terms of the GNU General Public License as published by
 ; the Free Software Foundation; either version 2 of the License, or
 ; (at your option) any later version.
 ;
 ; This program is distributed in the hope that it will be useful,
 ; but WITHOUT ANY WARRANTY; without even the implied warranty of
 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ; GNU General Public License for more details.
 ;
 ; You should have received a copy of the GNU General Public License
 ; along with this program; if not, write to the Free Software
 ; Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 ;
 ;;  VWSD LOGICAL TO ALLOW A NON-VA STATION ( NODE )WITH $D(HLVWNOVA) VARIABLE EXIST FOR HL LOGICAL LINKS
 ;
SETSHUT(LINKIEN) ;
 ;sets the shutdown flag (can not fail - if the link doesn't exist, by definition its shutdown)
 Q:'$G(LINKIEN) 1
 Q:'$D(^HLCS(870,LINKIEN,0)) 1
 S $P(^HLCS(870,LINKIEN,0),"^",16)=1
 Q 1
SETOPEN(LINKIEN) ;
 ;clears the shutdown flag, returns 1 on success, 0 on failure
 Q:'$G(LINKIEN) 0
 Q:'$D(^HLCS(870,LINKIEN,0)) 0
 S $P(^HLCS(870,LINKIEN,0),"^",16)=""
 Q 1
 ;
IFSHUT(LINKNAME) ;
 ;returns 1 if the link was shut down to HLO
 N IEN,LINK
 S LINK=$P($G(LINKNAME),":")
 Q:LINK=""
 S IEN=$O(^HLCS(870,"B",LINK,0))
 Q:'IEN 1
 Q:$P($G(^HLCS(870,IEN,0)),"^",16) 1
 Q 0
 ;
DOMAIN(LINKIEN) ;
 ;Returns the domain associated with this link
 ;
 Q:'$G(LINKIEN) ""
 N NODE,DOMAIN
 S DOMAIN=""
 S NODE=$G(^HLCS(870,LINKIEN,0))
 I $P(NODE,"^",7) D
 .S DOMAIN=$P($G(^DIC(4.2,$P(NODE,"^",7),0)),"^")
 .S DOMAIN=$S($L(DOMAIN):"HL7."_DOMAIN,1:"")
 I '$L(DOMAIN) S DOMAIN=$P(NODE,"^",8)
 Q DOMAIN
PORT(LINKIEN) ;
 ;Returns the HLO port associated with this link
 ;
 Q:'$G(LINKIEN) ""
 N NODE,PORT
 S NODE=$G(^HLCS(870,LINKIEN,400))
 S PORT=$P(NODE,"^",8)
 S:'PORT PORT=$S($P($G(^HLD(779.1,1,0)),"^",3)="P":5001,1:5026)
 Q PORT
 ;
PORT2(LINKNAME) ;given the name of the link, returns its HLO port
 Q $$PORT($O(^HLCS(870,"B",LINKNAME,0)))
 ;
STATNUM(LINKIEN) ;
 ;Given the ien of the link, this function returns the station #.
 ;
 Q:'$G(LINKIEN) ""
 N INST
 S INST=$P($G(^HLCS(870,LINKIEN,0)),"^",2)
 Q:'INST ""
 Q $P($G(^DIC(4,INST,99)),"^")
 ;
FINDLINK(STATN) ;
 ;Returns the link ien based on the station # =STATN
 ;The link found must have a name starting with "VA", as these are
 ;reserved for officially released links associated with VHA institutions
 ;** EXCEPTION** MPIVA is an official link associated with 200M
 ;***LOCAL VWSD - ALLOW NON-VA STATION (NODE) AS VARIABLE HLVWNOVA TO BE USED TO DETERMINE FACILITY LINK
 Q:'$L($G(STATN)) 0
 ;
 N NAME,IEN
 S (NAME,IEN)=""
 ; START LOCAL MOD VWSD FLAG HLVWNOVA
 ; F  S NAME=$O(^HLCS(870,"AC",STATN,NAME)) Q:NAME=""  I (NAME'="VA-VIE"),($E(NAME,1,2)="VA")!(NAME="MPIVA") S IEN=$O(^HLCS(870,"AC",STATN,NAME,0)) Q
 F  S NAME=$O(^HLCS(870,"AC",STATN,NAME)) Q:NAME=""  I (NAME'="VA-VIE"),(($E(NAME,1,2)="VA")!(NAME="MPIVA"))!$D(HLVWNOVA) S IEN=$O(^HLCS(870,"AC",STATN,NAME,0)) Q
 ;END LOCAL MOD
 Q IEN
 ;
GETLINK(LINKNAME,LINK) ;
 N IEN
 S IEN=$O(^HLCS(870,"B",LINKNAME,0))
 I IEN Q $$GET(IEN,.LINK)
 I LINKNAME="HLO DEFAULT LISTENER" D  Q 1
 .N NODE
 .S LINK("NAME")=LINKNAME
 .S LINK("IEN")=0
 .S LINK("SHUTDOWN")=""
 .S LINK("LLP")="TCP"
 .S LINK("SERVER")="1^"_"M"
 .S NODE=$G(^HLD(779.1,1,0))
 .S LINK("DOMAIN")=$P(NODE,"^",1)
 .S LINK("PORT")=$S($P(NODE,"^",3)="P":5001,$P(NODE,"^",3)="T":5026,1:"")
 .S LINK("IP")=""
 Q 0
GET(IEN,LINK) ;
 N NODE,PTR
 K LINK
 S NODE=$G(^HLCS(870,IEN,0))
 Q:NODE="" 0
 S LINK("NAME")=$P(NODE,"^")
 S LINK("IEN")=IEN
 S LINK("SHUTDOWN")=+$P(NODE,"^",16)
 I $P(NODE,"^",7) D
 .S LINK("DOMAIN")=$P(^DIC(4.2,$P(NODE,"^",7),0),"^")
 .S LINK("DOMAIN")=$S($L(LINK("DOMAIN")):"HL7."_LINK("DOMAIN"),1:"")
 I $G(LINK("DOMAIN"))="" S LINK("DOMAIN")=$P(NODE,"^",8)
 S PTR=$P(NODE,"^",3)
 S LINK("LLP")=$S('PTR:"",1:$P($G(^HLCS(869.1,PTR,0)),"^"))
 S LINK("SERVER")=""
 I LINK("LLP")="TCP" D
 .S LINK("SERVER")=1
 .S NODE=$G(^HLCS(870,IEN,400))
 .S LINK("IP")=$P(NODE,"^")
 .S LINK("PORT")=$P(NODE,"^",8)
 .S:'LINK("PORT") LINK("PORT")=$S($P($G(^HLD(779.1,1,0)),"^",3)="P":5001,1:5026)
 .S:$P(NODE,"^",3)="C" LINK("SERVER")=0
 .I LINK("SERVER") S LINK("SERVER")=LINK("SERVER")_"^"_$P(NODE,"^",3)
 Q 1
 ;
SET1(LINK,MDOMAIN) ;
 N DOMAIN
 Q:'$L(MDOMAIN)
 S DOMAIN=$P($G(^DIC(4.2,MDOMAIN,0)),"^")
 S DOMAIN=$S($L(DOMAIN):"HL7."_DOMAIN,1:"")
 I DOMAIN'="" S ^HLCS(870,"AD","TCP",DOMAIN,LINK)=""
 Q
KILL1(LINK,MDOMAIN) ;
 N DOMAIN
 Q:'$L(MDOMAIN)
 S DOMAIN=$P($G(^DIC(4.2,MDOMAIN,0)),"^")
 S DOMAIN=$S($L(DOMAIN):"HL7."_DOMAIN,1:"")
 I DOMAIN'="" K ^HLCS(870,"AD","TCP",DOMAIN,LINK)
 Q
SET2(LINK,DOMAIN) ;
 I DOMAIN'="" S ^HLCS(870,"AD","TCP",DOMAIN,LINK)=""
 Q
KILL2(LINK,DOMAIN) ;
 I DOMAIN'="" K ^HLCS(870,"AD","TCP",DOMAIN,LINK)
 Q
SET3(LINK,DEVICE) ;
 Q:'DEVICE
 S ^HLCS(870,"AD","HLLP",DEVICE,LINK)=""
 Q
KILL3(LINK,DEVICE) ;
 Q:'DEVICE
 S ^HLCS(870,"AD","HLLP",DEVICE,LINK)=""
 Q
LLP(LINKNAME) ;
 ;finds the type of LLP for a named link
 N IEN,LLP
 S IEN=$O(^HLCS(870,"B",LINKNAME,0))
 Q:'IEN ""
 S LLP=$P($G(^HLCS(870,IEN,0)),"^",3)
 Q:'LLP ""
 Q $P($G(^HLCS(869.1,LLP,0)),"^")
 ;
DEVICE(LINKNAME) ;
 N IEN
 S IEN=$O(^HLCS(870,"B",LINKNAME,0))
 Q:'IEN ""
 Q $P($G(^HLCS(870,IEN,200)),"^")
 ;
RTRNLNK(COMP1,COMP2,COMP3) ;
 ;based on the sending facility from the original header, this function finds the return link, or "" if not successful
 ;Inputs:
 ;  COMP1,COMP2,COMP3 - 3 components of the sending facility from the original message
 ;
 N LINK,IEN
 S LINK=""
 I $G(COMP3)="DNS",$P($G(COMP2),":")]"" S LINK=$O(^HLCS(870,"AD","TCP",$P(COMP2,":"),""))
 I LINK="",$L($G(COMP1)) S IEN=$$FINDLINK(COMP1) S:IEN LINK=$P($G(^HLCS(870,IEN,0)),"^")
 Q LINK
 ;
 ;HLLP is not implemented in HLO
 ;I LLP="HLLP" N DEVICE S DEVICE=$$DEVICE(FROMLINK) I DEVICE Q $O(^HLCS(870,"AD","TCP",DEVICE,""))
 ;Q ""
 ;
CHKLINK(LINK) ;
 Q:'$L(LINK) 0
 Q:'$O(^HLCS(870,"B",LINK,0)) 0
 Q 1