From c71655cec251f519d1a6171353ce99f6f385c64a Mon Sep 17 00:00:00 2001
From: "vladimir.buzalka" <vladimir.buzalka@buzalka.cz>
Date: Thu, 12 Feb 2026 11:29:41 +0100
Subject: [PATCH] z230

---
 compare_recovery.py | 161 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 compare_recovery.py

diff --git a/compare_recovery.py b/compare_recovery.py
new file mode 100644
index 0000000..ff4a9cb
--- /dev/null
+++ b/compare_recovery.py
@@ -0,0 +1,161 @@
+"""
+Compare original Dropbox folder with recovery folder — file by file.
+
+Checks:
+  1. Files in original but missing in recovery
+  2. Files in recovery but missing in original
+  3. Size mismatches
+  4. Content mismatches (BLAKE3 hash)
+
+Usage: python compare_recovery.py
+"""
+
+import os
+import sys
+import time
+from indexer.config import ROOT_PATH
+from indexer.hasher import blake3_file
+
+RECOVERY_DIR = r"U:\recovery"
+
+
+def scan_dir(root: str) -> dict:
+    """Walk directory, return {relative_path: {size, full_path}}."""
+    result = {}
+    for dirpath, _dirs, files in os.walk(root):
+        for fn in files:
+            full = os.path.join(dirpath, fn)
+            try:
+                size = os.path.getsize(full)
+            except (OSError, PermissionError):
+                continue
+            rel = os.path.relpath(full, root).replace("\\", "/")
+            result[rel] = {"size": size, "full_path": full}
+    return result
+
+
+def main():
+    original_dir = ROOT_PATH.rstrip("\\/")
+    recovery_dir = RECOVERY_DIR.rstrip("\\/")
+
+    print("=" * 70)
+    print("COMPARE: Original vs Recovery")
+    print(f"  Original : {original_dir}")
+    print(f"  Recovery : {recovery_dir}")
+    print("=" * 70)
+
+    if not os.path.isdir(original_dir):
+        print(f"ERROR: Original dir not found: {original_dir}")
+        sys.exit(1)
+    if not os.path.isdir(recovery_dir):
+        print(f"ERROR: Recovery dir not found: {recovery_dir}")
+        sys.exit(1)
+
+    # ── 1. Scan both directories ──
+    print("\n[1/3] Scanning original...")
+    orig = scan_dir(original_dir)
+    print(f"       {len(orig)} files")
+
+    print("[2/3] Scanning recovery...")
+    recov = scan_dir(recovery_dir)
+    print(f"       {len(recov)} files")
+
+    orig_paths = set(orig.keys())
+    recov_paths = set(recov.keys())
+
+    missing_in_recovery = sorted(orig_paths - recov_paths)
+    extra_in_recovery = sorted(recov_paths - orig_paths)
+    common = sorted(orig_paths & recov_paths)
+
+    # ── 2. Report missing / extra ──
+    print(f"\n{'='*70}")
+    print(f"  Common files          : {len(common)}")
+    print(f"  Missing in recovery   : {len(missing_in_recovery)}")
+    print(f"  Extra in recovery     : {len(extra_in_recovery)}")
+    print(f"{'='*70}")
+
+    if missing_in_recovery:
+        print(f"\n--- Missing in recovery ({len(missing_in_recovery)}) ---")
+        for p in missing_in_recovery[:50]:
+            print(f"  {p}  ({orig[p]['size']} bytes)")
+        if len(missing_in_recovery) > 50:
+            print(f"  ... and {len(missing_in_recovery) - 50} more")
+
+    if extra_in_recovery:
+        print(f"\n--- Extra in recovery ({len(extra_in_recovery)}) ---")
+        for p in extra_in_recovery[:50]:
+            print(f"  {p}  ({recov[p]['size']} bytes)")
+        if len(extra_in_recovery) > 50:
+            print(f"  ... and {len(extra_in_recovery) - 50} more")
+
+    # ── 3. Compare common files: size + hash ──
+    print(f"\n[3/3] Comparing {len(common)} common files (size + BLAKE3)...")
+    size_mismatch = []
+    hash_mismatch = []
+    hash_ok = 0
+    errors = 0
+    start = time.time()
+
+    for i, p in enumerate(common, 1):
+        o = orig[p]
+        r = recov[p]
+
+        if o["size"] != r["size"]:
+            size_mismatch.append((p, o["size"], r["size"]))
+            continue
+
+        # Same size → compare BLAKE3 hash
+        try:
+            h_orig = blake3_file(o["full_path"])
+            h_recov = blake3_file(r["full_path"])
+        except Exception as e:
+            errors += 1
+            print(f"  ERROR hashing {p}: {e}")
+            continue
+
+        if h_orig != h_recov:
+            hash_mismatch.append(p)
+        else:
+            hash_ok += 1
+
+        if i % 2000 == 0:
+            elapsed = time.time() - start
+            print(f"  [{i}/{len(common)}] ok={hash_ok} size_diff={len(size_mismatch)} "
+                  f"hash_diff={len(hash_mismatch)} errors={errors} elapsed={elapsed:.0f}s")
+
+    elapsed = time.time() - start
+
+    # ── Summary ──
+    print(f"\n{'='*70}")
+    print(f"COMPARISON COMPLETE  ({elapsed:.0f}s)")
+    print(f"{'='*70}")
+    print(f"  Original files        : {len(orig)}")
+    print(f"  Recovery files        : {len(recov)}")
+    print(f"  Missing in recovery   : {len(missing_in_recovery)}")
+    print(f"  Extra in recovery     : {len(extra_in_recovery)}")
+    print(f"  Size matches + hash OK: {hash_ok}")
+    print(f"  Size mismatches       : {len(size_mismatch)}")
+    print(f"  Hash mismatches       : {len(hash_mismatch)}")
+    print(f"  Errors                : {errors}")
+
+    if size_mismatch:
+        print(f"\n--- Size mismatches ({len(size_mismatch)}) ---")
+        for p, os_, rs in size_mismatch[:20]:
+            print(f"  {p}  orig={os_} recov={rs}")
+
+    if hash_mismatch:
+        print(f"\n--- Hash mismatches ({len(hash_mismatch)}) ---")
+        for p in hash_mismatch[:20]:
+            print(f"  {p}")
+
+    if not missing_in_recovery and not extra_in_recovery and not size_mismatch and not hash_mismatch and errors == 0:
+        print("\n✓ PERFECT MATCH — recovery is identical to original.")
+    elif not size_mismatch and not hash_mismatch and errors == 0:
+        print(f"\n✓ All {hash_ok} common files match. "
+              f"({len(missing_in_recovery)} missing, {len(extra_in_recovery)} extra)")
+
+    print(f"{'='*70}")
+
+
+if __name__ == "__main__":
+    main()