commit ab46cf833692b001f68d3667751cce93b212fed7
Author: Mika <kontakt@donau2space.de>
Date:   Sun Feb 22 12:32:32 2026 +0000

    Add artifact.logging_module/src/artifact_logging_module/core.py

diff --git a/artifact.logging_module/src/artifact_logging_module/core.py b/artifact.logging_module/src/artifact_logging_module/core.py
new file mode 100644
index 0000000..c64c64e
--- /dev/null
+++ b/artifact.logging_module/src/artifact_logging_module/core.py
@@ -0,0 +1,112 @@
+import json
+import os
+from datetime import datetime
+from pathlib import Path
+from typing import Optional, List, Dict, Any
+
+__all__ = ["LogEntry", "log_decision", "generate_report"]
+
+
+class LogEntry:
+    """Repräsentiert einen einzelnen Logeintrag einer CI-Entscheidung."""
+
+    def __init__(
+        self,
+        timestamp: datetime,
+        decision_type: str,
+        reason_code: str,
+        additional_info: Optional[str] = None,
+    ) -> None:
+        self.timestamp = timestamp
+        self.decision_type = decision_type
+        self.reason_code = reason_code
+        self.additional_info = additional_info or ""
+
+    def to_dict(self) -> Dict[str, Any]:
+        return {
+            "timestamp": self.timestamp.isoformat(),
+            "decision_type": self.decision_type,
+            "reason_code": self.reason_code,
+            "additional_info": self.additional_info,
+        }
+
+
+_LOG_PATH = Path("data/ci_decisions.json")
+
+
+class _LogError(Exception):
+    pass
+
+
+def _validate_decision(decision_type: str, reason_code: str) -> None:
+    valid_types = {"PASS", "WARN", "UNKNOWN"}
+    assert isinstance(decision_type, str) and decision_type in valid_types, (
+        f"Ungültiger decision_type: {decision_type}. Erwartet: {valid_types}."
+    )
+    assert isinstance(reason_code, str) and reason_code.strip(), (
+        "reason_code muss ein nicht-leerer String sein."
+    )
+
+
+def _load_existing_logs(path: Path) -> List[Dict[str, Any]]:
+    if not path.exists():
+        return []
+    try:
+        with path.open("r", encoding="utf-8") as f:
+            return json.load(f)
+    except (json.JSONDecodeError, OSError) as e:
+        raise _LogError(f"Fehler beim Laden der Logdatei: {e}") from e
+
+
+def _write_logs(path: Path, logs: List[Dict[str, Any]]) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    try:
+        with path.open("w", encoding="utf-8") as f:
+            json.dump(logs, f, ensure_ascii=False, indent=2)
+    except OSError as e:
+        raise _LogError(f"Fehler beim Schreiben der Logdatei: {e}") from e
+
+
+def log_decision(decision_type: str, reason_code: str) -> None:
+    """Protokolliert eine CI-Entscheidung in data/ci_decisions.json."""
+
+    _validate_decision(decision_type, reason_code)
+
+    entry = LogEntry(
+        timestamp=datetime.utcnow(),
+        decision_type=decision_type,
+        reason_code=reason_code,
+    )
+
+    logs = _load_existing_logs(_LOG_PATH)
+    logs.append(entry.to_dict())
+    _write_logs(_LOG_PATH, logs)
+
+
+def generate_report() -> str:
+    """Erzeugt eine textuelle Zusammenfassung der Entscheidungsstatistik."""
+
+    logs = _load_existing_logs(_LOG_PATH)
+    if not logs:
+        return "Keine Logeinträge gefunden."
+
+    stats = {"PASS": 0, "WARN": 0, "UNKNOWN": 0}
+    for e in logs:
+        dt = e.get("decision_type")
+        if dt in stats:
+            stats[dt] += 1
+        else:
+            stats["UNKNOWN"] += 1
+
+    total = sum(stats.values()) or 1
+    warn_rate = (stats["WARN"] / total) * 100
+
+    report_lines = [
+        "CI Decisions Summary Report",
+        "============================",
+        f"Total Entries: {total}",
+        f"PASS:   {stats['PASS']}",
+        f"WARN:   {stats['WARN']} ({warn_rate:.2f}%)",
+        f"UNKNOWN:{stats['UNKNOWN']}",
+    ]
+    return "\n".join(report_lines)