more data

controller/solver/phase1_general.py

@@ -1,7 +1,7 @@
 """
 Phase 1: general courses (shared across every batch of a session).
 
-Simple strategy — small offering count, Tue/Thu preferred first. After
+Simple strategy — small offering count, Mon/Wed preferred first. After
 placing everything, self-repair: any batch left with two general-course
 sessions in the same slot has the losing session unmarked and re-placed
 (scanning every day) until this phase's own sessions are clash-free.
@@ -10,7 +10,7 @@ sessions in the same slot has the losing session unmarked and re-placed
 from . import grid
 
 
-def run(board, data, preferred_days=("Tuesday", "Thursday"), max_repair_attempts=20):
+def run(board, data, preferred_days=("Monday", "Wednesday"), max_repair_attempts=20):
     """Places every general-course offering's weekly lectures. Returns this phase's sessions."""
     general = [o for o in data["offerings"] if o["course"]["is_general"]]
     preferred_order = list(preferred_days) + [d for d in grid.DAYS if d not in preferred_days]

controller/solver/placement_board.py

@@ -10,11 +10,21 @@ phases' placements as fixed/locked.
 from . import grid
 
 
+def _is_lab_room_type(room_type):
+    """
+    Real room data uses free-text room_type labels (e.g. "Computing
+    Laboratories", "electrical", "Classrooms", "Civil", "physics") rather
+    than a fixed classroom/lab enum. Any label mentioning "lab" is treated
+    as a lab room; everything else is a classroom.
+    """
+    return "lab" in (room_type or "").lower()
+
+
 class PlacementBoard:
     def __init__(self, data):
         self.data = data
-        self.classrooms = [r for r in data["rooms"] if r["room_type"] == "classroom"]
-        self.labs = [r for r in data["rooms"] if r["room_type"] == "lab"]
+        self.classrooms = [r for r in data["rooms"] if not _is_lab_room_type(r["room_type"])]
+        self.labs = [r for r in data["rooms"] if _is_lab_room_type(r["room_type"])]
 
         # busy[(day, slot_index)] -> set of keys already occupied
         self.room_busy = {}