cropping summaries

copienator/commands/crop_exercise_bottoms.py

@@ -134,6 +134,27 @@ def _publish(
     return backup_root
 
 
+def crop_statistics(records: list[dict]) -> tuple[int, float]:
+    """Return cropped exercise count and mean removed percentage per exercise."""
+    totals: dict[str, list[float]] = {}
+    cropped_files: set[str] = set()
+    for record in records:
+        total_height, removed_height = totals.setdefault(record["file"], [0.0, 0.0])
+        totals[record["file"]] = [
+            total_height + float(record["height_lines"]),
+            removed_height + float(record["bottom_removed_lines"]),
+        ]
+        if record["status"] == "cropped":
+            cropped_files.add(record["file"])
+    percentages = [
+        min(100.0, totals[file_name][1] / totals[file_name][0] * 100)
+        for file_name in cropped_files
+        if totals[file_name][0] > 0
+    ]
+    mean_percentage = sum(percentages) / len(percentages) if percentages else 0.0
+    return len(cropped_files), mean_percentage
+
+
 def run(workspace: EvaluationWorkspace, target: Path, *, workers: int = 5) -> ExitCode:
     if workers < 1:
         raise CliError(
@@ -161,15 +182,23 @@ def run(workspace: EvaluationWorkspace, target: Path, *, workers: int = 5) -> Ex
                 raise CliError(
                     f"{source} a changé pendant l’analyse. Aucun PDF remplacé."
                 )
+        cropped_exercises, mean_percentage = crop_statistics(records)
         if not changed_files:
-            print("Terminé : aucun PDF ne remplit les critères de rognage.", flush=True)
+            print("Terminé : aucun exercice ne remplit les critères de rognage.", flush=True)
+            print(
+                "Rognage moyen des exercices modifiés : 0.0 %.", flush=True
+            )
             return ExitCode.SUCCESS
         backup = _publish(workspace, changed_files, staging, records)
     cropped_pages = sum(record["status"] == "cropped" for record in records)
     print(f"Sauvegarde des PDF non rognés : {backup}", flush=True)
     print(
-        f"Terminé : {cropped_pages} page(s) rognée(s) dans "
-        f"{len(changed_files)} PDF remplacé(s).",
+        f"Terminé : {cropped_exercises} exercice(s) rogné(s), soit "
+        f"{cropped_pages} page(s) dans {len(changed_files)} PDF remplacé(s).",
+        flush=True,
+    )
+    print(
+        f"Rognage moyen des exercices modifiés : {mean_percentage:.1f} %.",
         flush=True,
     )
     return ExitCode.SUCCESS