add(timetabling): print overlaps found when processing

timetabling/README.md

 
 # Timetabling Scripts
 
-* `timetable-ics.py` -- convert the Timetabling team spreadsheets into ICS format. This is a rough and ready script and will probably need tweaks to your particular spreadsheet.
+* `timetable-ics.py` -- convert the Timetabling team spreadsheets into ICS format. This is a rough and ready script and will probably need tweaks to your particular spreadsheet. Also prints out overlaps spotted.

timetabling/timetable-ics.py

@@ -69,6 +69,9 @@ with open(timetable_csv) as f:
         duration_hours = row["Duration"]
         weeks = get_weeks(row["Teaching Week Pattern"])
 
+        if "TUT" in name:
+            continue
+
         for week in weeks:
             offset = get_day_offset(day)
             if offset < 0:
@@ -86,3 +89,26 @@ with open(timetable_csv) as f:
 for year in cals:
     with open(f"Year{year}.ics", 'w') as icsfile:
         icsfile.writelines(cals[year].serialize_iter())
+
+    overlaps = set()
+    overlaps_full = set()
+    for event in cals[year].events:
+        event_overlaps = cals[year].timeline.overlapping(event.begin, event.end)
+        for overlap in event_overlaps:
+            true_over = \
+                overlap.uid != event.uid \
+                and event.begin != overlap.end \
+                and event.end != overlap.begin \
+                and "TUT" not in event.name \
+                and "TUT" not in overlap.name
+            overlap_entry = frozenset([event.name, overlap.name])
+            if true_over and overlap_entry not in overlaps:
+                overlaps.add(overlap_entry)
+                overlaps_full.add(frozenset([
+                    f"{event.name}@{event.begin.strftime('%a %H:%M')}",
+                    f"{overlap.name}@{overlap.begin.strftime('%a %H:%M')}"
+                ]))
+    for overlap in overlaps_full:
+        print("OVERLAP:")
+        for detail in overlap:
+            print(" ", detail)