From c791cd0daefaf3805ad2a0dfb875aa64e07c179a Mon Sep 17 00:00:00 2001
From: Gabe Fierro <gtfierro@mines.edu>
Date: Wed, 27 Sep 2023 12:44:13 -0600
Subject: [PATCH] implement inference rules for charging directionality

---
 bricksrc/rules.ttl     | 22 +++++++++++++++++++++-
 examples/evse/evse.ttl |  5 ++++-
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/bricksrc/rules.ttl b/bricksrc/rules.ttl
index 1e5f3b99..7f707053 100644
--- a/bricksrc/rules.ttl
+++ b/bricksrc/rules.ttl
@@ -414,4 +414,24 @@ bsh:AddDefaultEVSEChargerDirection a sh:NodeShape ;
     ] ;
 .
 
-# inherit
+# inherit the directionality of the EVSE charger to the ports
+bsh:InheritEVSEChargerDirection a sh:NodeShape ;
+    sh:targetClass brick:Electric_Vehicle_Charging_Port ;
+    sh:rule [
+        a sh:SPARQLRule ;
+        sh:prefixes <https://brickschema.org/schema/1.3/Brick> ;
+        sh:construct """
+        CONSTRUCT {
+            $this brick:electricVehicleChargerDirectionality ?direction
+        } WHERE {
+            $this rdf:type brick:Electric_Vehicle_Charging_Port .
+            $this brick:isPartOf ?charger .
+            ?charger a brick:Electric_Vehicle_Charging_Station .
+            ?charger brick:electricVehicleChargerDirectionality ?direction .
+            FILTER NOT EXISTS {
+                $this brick:electricVehicleChargerDirectionality ?other_direction .
+            }
+        }
+        """ ;
+    ] ;
+.
diff --git a/examples/evse/evse.ttl b/examples/evse/evse.ttl
index d96b8287..331ee782 100644
--- a/examples/evse/evse.ttl
+++ b/examples/evse/evse.ttl
@@ -10,12 +10,12 @@
     brick:hasPart :station1, :station2 .
 
 :station1 a brick:Electric_Vehicle_Charging_Station ;
-    brick:electricVehicleChargerDirectionality [ brick:value "bidirectional" ] ;
     brick:electricVehicleChargerType [ brick:value "Level 1" ] ;
     brick:hasPart :port1-1, :port1-2 ;
 .
 
 :port1-1 a brick:Electric_Vehicle_Charging_Port ;
+    brick:electricVehicleChargerDirectionality [ brick:value "bidirectional" ] ;
     brick:electricVehicleConnectorType [ brick:value "Level 1 (SAE J1772)" ] ;
     brick:currentFlowType [ brick:value "AC" ] ;
     brick:electricalPhaseCount [ brick:value "1" ] ;
@@ -26,6 +26,7 @@
 .
 
 :port1-2 a brick:Electric_Vehicle_Charging_Port ;
+    brick:electricVehicleChargerDirectionality [ brick:value "bidirectional" ] ;
     brick:electricVehicleConnectorType [ brick:value "Level 1 (SAE J1772)" ] ;
     brick:currentFlowType [ brick:value "AC" ] ;
     brick:electricalPhaseCount [ brick:value "1" ] ;
@@ -36,11 +37,13 @@
 .
 
 :station2 a brick:Electric_Vehicle_Charging_Station ;
+    brick:electricVehicleChargerDirectionality [ brick:value "unidirectional" ] ;
     brick:electricVehicleChargerType [ brick:value "Level 2" ] ;
     brick:hasPart :port2-1 ;
 .
 
 :port2-1 a brick:Electric_Vehicle_Charging_Port ;
+    # this should inherit 'unidirectional' from the station
     brick:electricVehicleConnectorType [ brick:value "Level 2 (IEC 62196)" ] ;
     brick:currentFlowType [ brick:value "AC" ] ;
     brick:electricalPhaseCount [ brick:value "3" ] ;