normalizar-case

processors/checks.py

@@ -155,3 +155,28 @@ def check_comicinfo(names: list[str]) -> StepResult:
     )
     warnings = [] if found else ["Falta ComicInfo.xml"]
     return StepResult(step="check_comicinfo", changed=False, warnings=warnings)
+
+
+def check_extension_case(names: list[str], mode: str = "lower") -> StepResult:
+    """Detecta imágenes cuya extensión no está en el case esperado (lower/upper)."""
+    mismatches = []
+    for name in names:
+        normalized = name.replace("\\", "/")
+        if normalized.endswith("/"):
+            continue
+        basename = normalized.rsplit("/", 1)[-1]
+        _, ext = os.path.splitext(basename)
+        if not ext or ext.lower() not in IMAGE_EXTENSIONS:
+            continue
+        target_ext = ext.lower() if mode == "lower" else ext.upper()
+        if ext != target_ext:
+            mismatches.append(basename)
+
+    if not mismatches:
+        warnings = []
+    elif len(mismatches) <= 3:
+        warnings = [f"Case incorrecto en extensión: {f}" for f in sorted(mismatches)]
+    else:
+        warnings = [f"Case incorrecto en extensión: {len(mismatches)} ficheros"]
+
+    return StepResult(step="check_extension_case", changed=False, warnings=warnings)