From b178efed33a7758197dabd2aef0a4ee83407ae9e Mon Sep 17 00:00:00 2001
From: SeanvdMeer <18538762+minisean@users.noreply.github.com>
Date: Sat, 21 Jun 2025 15:50:42 +0200
Subject: [PATCH] Added directional edge ID object

---
 .../connectivity/intrf_channel_identifier.py  | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/src/qce_circuit/connectivity/intrf_channel_identifier.py b/src/qce_circuit/connectivity/intrf_channel_identifier.py
index fceb75f..cdcb86c 100644
--- a/src/qce_circuit/connectivity/intrf_channel_identifier.py
+++ b/src/qce_circuit/connectivity/intrf_channel_identifier.py
@@ -321,3 +321,46 @@ def from_qubit_ids(cls, qubit_id0: QID, qubit_id1: QID) -> 'EdgeIDObj':
             qubit_id1=QubitIDObj(_id=qubit_id1),
         )
     # endregion
+
+
+@dataclass(frozen=True)
+class DirectedEdgeIDObj(EdgeIDObj, IEdgeID):
+    """
+    Data class, implementing (directed) IEdgeID interface.
+    """
+
+    # region Class Properties
+    @property
+    def from_qubit(self) -> IQubitID:
+        return self.qubit_id0
+
+    @property
+    def to_qubit(self) -> IQubitID:
+        return self.qubit_id1
+    # endregion
+
+    # region Class Methods
+    def __hash__(self):
+        """
+        Sorts individual qubit hashes such that the order is NOT maintained.
+        Making hash comparison independent of order.
+        """
+        return hash((self.qubit_id0.__hash__(), self.qubit_id1.__hash__()))
+
+    def __eq__(self, other):
+        if isinstance(other, IEdgeID):
+            # Edge is equal if they share the same qubit identifiers, order does not matter
+            return other.__hash__() == self.__hash__()
+        return False
+
+    def __repr__(self):
+        return f'<Directed-Edge-ID>{self.id}'
+
+    @classmethod
+    def from_qubit_ids(cls, qubit_id0: QID, qubit_id1: QID) -> 'DirectedEdgeIDObj':
+        """:return: Class method constructor based on qubit-IDs."""
+        return DirectedEdgeIDObj(
+            qubit_id0=QubitIDObj(_id=qubit_id0),
+            qubit_id1=QubitIDObj(_id=qubit_id1),
+        )
+    # endregion