Add backup script for external Firebird databases

Nightly backup of all MEDICUS_FILES_*.fdb from U:\externi to U:\externabackup via gbak + zip with email notification.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Backup/BackupExterniDB.py

@@ -0,0 +1,172 @@
+import subprocess
+import json
+import os
+from pathlib import Path
+from datetime import datetime
+import zipfile
+import time
+import traceback
+
+from EmailMessagingGraph import send_mail
+
+# ============================================================
+# CONFIG
+# ============================================================
+
+GBAK = r"C:\Program Files\Firebird\Firebird_2_5_CGM\bin\gbak.exe"
+FB_USER = "SYSDBA"
+FB_PASS = "masterkey"
+FB_PORT = "3050"
+
+SRC_DIR = Path(r"U:\externi")
+BACKUP_DIR = Path(r"U:\externabackup")
+
+MAIL_TO = "vladimir.buzalka@buzalka.cz"
+
+CHUNK = 8 * 1024 * 1024  # 8 MB
+
+
+# ============================================================
+# MAIN
+# ============================================================
+
+def main():
+    BACKUP_DIR.mkdir(parents=True, exist_ok=True)
+    now = datetime.now()
+    ts = now.strftime("%Y-%m-%d_%H-%M-%S")
+
+    # Find all FDB files (case-insensitive)
+    fdb_files = sorted(SRC_DIR.glob("MEDICUS_FILES_*.fdb"))
+    fdb_upper = sorted(SRC_DIR.glob("MEDICUS_FILES_*.FDB"))
+    fdb_all = sorted(
+        set(fdb_files + fdb_upper),
+        key=lambda p: p.name.lower(),
+    )
+
+    backed_up = []
+    errors = []
+
+    for fdb in fdb_all:
+        name = fdb.stem
+        fbk = BACKUP_DIR / f"{name}_{ts}.fbk"
+        zipf = BACKUP_DIR / f"{name}_{ts}.zip"
+        log = BACKUP_DIR / f"{name}_{ts}.log"
+
+        result = {
+            "file": fdb.name,
+            "ok": False,
+            "fbk_size": 0,
+            "zip_size": 0,
+            "t_gbak": 0,
+            "t_zip": 0,
+            "error": None,
+        }
+
+        try:
+            # 1) GBAK
+            print(f"GBAK: {fdb.name} ... ", end="", flush=True)
+            t0 = time.time()
+            db_conn = f"localhost/{FB_PORT}:{fdb}"
+            cmd = [
+                GBAK, "-b",
+                "-user", FB_USER,
+                "-pas", FB_PASS,
+                db_conn, str(fbk),
+                "-v",
+            ]
+            with open(log, "w", encoding="utf-8") as f:
+                subprocess.run(
+                    cmd, stdout=f, stderr=subprocess.STDOUT, check=True,
+                )
+            result["t_gbak"] = time.time() - t0
+            result["fbk_size"] = fbk.stat().st_size
+            print(f"OK ({result['t_gbak']:.0f}s)")
+
+            # 2) ZIP
+            t1 = time.time()
+            processed = 0
+            fbk_size = result["fbk_size"]
+
+            with zipfile.ZipFile(
+                zipf, "w",
+                compression=zipfile.ZIP_DEFLATED,
+                compresslevel=9,
+            ) as zf:
+                zi = zipfile.ZipInfo(fbk.name)
+                zi.compress_type = zipfile.ZIP_DEFLATED
+                with zf.open(zi, "w", force_zip64=True) as z:
+                    with open(fbk, "rb") as src:
+                        while buf := src.read(CHUNK):
+                            z.write(buf)
+                            processed += len(buf)
+                            pct = processed * 100 / fbk_size
+                            print(
+                                f"\r  ZIP {name}: {pct:6.2f}%",
+                                end="", flush=True,
+                            )
+            print()
+
+            result["t_zip"] = time.time() - t1
+            result["zip_size"] = zipf.stat().st_size
+
+            # 3) DELETE FBK + LOG
+            fbk.unlink()
+            log.unlink()
+
+            result["ok"] = True
+            backed_up.append(result)
+
+        except Exception:
+            result["error"] = traceback.format_exc()
+            errors.append(result)
+            for f in (fbk, log):
+                if f.exists():
+                    f.unlink()
+
+    # Build report
+    report = []
+    report.append(f"Backup externi DB - {now.strftime('%d.%m.%Y %H:%M')}")
+    report.append(f"Celkem souboru: {len(fdb_all)}")
+    report.append(f"Zalohovano: {len(backed_up)}")
+    report.append(f"Chyby: {len(errors)}")
+    report.append("")
+
+    if backed_up:
+        report.append("--- Backed up ---")
+        total_zip = 0
+        for r in backed_up:
+            total_zip += r["zip_size"]
+            report.append(
+                f"  {r['file']}: "
+                f"FBK {r['fbk_size']/1024/1024:.1f} MB -> "
+                f"ZIP {r['zip_size']/1024/1024:.1f} MB "
+                f"(gbak {r['t_gbak']:.0f}s, zip {r['t_zip']:.0f}s)"
+            )
+        report.append(f"  Total ZIP: {total_zip / 1024 / 1024:.1f} MB")
+        report.append("")
+
+    if errors:
+        report.append("--- ERRORS ---")
+        for r in errors:
+            report.append(f"  {r['file']}: {r['error']}")
+        report.append("")
+
+    # Send email
+    has_errors = len(errors) > 0
+    subject = (
+        f"{'X' if has_errors else 'OK'} "
+        f"MEDICUS externi DB - "
+        f"backup {len(backed_up)}/{len(fdb_all)}"
+        f"{f', {len(errors)} errors' if has_errors else ''}"
+    )
+
+    send_mail(MAIL_TO, subject, "\n".join(report))
+
+    print("\n" + "\n".join(report))
+
+    if errors:
+        raise RuntimeError(f"{len(errors)} backup(s) failed")
+
+
+if __name__ == "__main__":
+    main()