fix: try all 3 EXIF date tags + raw bytes scan in _read_cr2_exif

organize.py

@@ -176,18 +176,24 @@ def _read_other_exif_pil(path: Path) -> str | None:
 
 
 def _read_cr2_exif(path: Path) -> str | None:
-    """CR2/CR3 (Canon Raw): try piexif first, then PIL embedded JPEG."""
-    # Tier 1: piexif on CR2 (TIFF-based EXIF)
+    """CR2/CR3 (Canon Raw): try piexif, then PIL, then raw bytes scan."""
+    # ── Tier 1: piexif (TIFF-based EXIF) ──────────────────────
     if HAS_PIEXIF:
         try:
             exif_dict = piexif.load(str(path))
-            raw_val = exif_dict.get('Exif', {}).get(piexif.ExifIFD.DateTimeOriginal)
-            if raw_val:
-                return raw_val.decode('utf-8')
+            # All possible date tag locations in EXIF
+            for ifd_name, tag_id in (
+                ('Exif', piexif.ExifIFD.DateTimeOriginal),    # 36867
+                ('Exif', piexif.ExifIFD.DateTimeDigitized),   # 36868
+                ('Image', piexif.ImageIFD.DateTime),           # 306
+            ):
+                raw_val = exif_dict.get(ifd_name, {}).get(tag_id)
+                if raw_val:
+                    return raw_val.decode('utf-8')
         except Exception:
             pass
 
-    # Tier 2: PIL can read EXIF from CR2's embedded JPEG preview
+    # ── Tier 2: PIL (embedded JPEG preview) ───────────────────
     try:
         from PIL import Image
         from PIL.ExifTags import TAGS
@@ -195,11 +201,21 @@ def _read_cr2_exif(path: Path) -> str | None:
         raw = img._getexif()
         img.close()
         if raw:
-            tag_map = {v: k for k, v in TAGS.items()}
-            for tag_name in ('DateTimeOriginal', 'DateTime'):
-                tag_code = tag_map.get(tag_name)
-                if tag_code and tag_code in raw:
-                    return raw[tag_code]
+            for tag_code in (36867, 36868, 306):  # DateTimeOriginal, Digitized, DateTime
+                val = raw.get(tag_code)
+                if val:
+                    return val
+    except Exception:
+        pass
+
+    # ── Tier 3: raw bytes scan (last resort) ──────────────────
+    try:
+        data = path.read_bytes()
+        # CR2 stores dates as ASCII 'YYYY:MM:DD HH:MM:SS'
+        import re
+        m = re.search(rb'(\d{4}:\d{2}:\d{2} \d{2}:\d{2}:\d{2})', data)
+        if m:
+            return m.group(1).decode('ascii')
     except Exception:
         pass
     return None