From 65be4c9edc8c0d8914715b189e3f34a1d348843e Mon Sep 17 00:00:00 2001
From: Mika <kontakt@donau2space.de>
Date: Sun, 8 Feb 2026 16:05:52 +0000
Subject: [PATCH] Add
 input_validation_script/src/input_validation_script/core.py

---
 .../src/input_validation_script/core.py       | 74 +++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 input_validation_script/src/input_validation_script/core.py

diff --git a/input_validation_script/src/input_validation_script/core.py b/input_validation_script/src/input_validation_script/core.py
new file mode 100644
index 0000000..48826ce
--- /dev/null
+++ b/input_validation_script/src/input_validation_script/core.py
@@ -0,0 +1,74 @@
+import json
+import os
+from pathlib import Path
+from typing import Any, Dict, Union
+from jsonschema import validate, ValidationError
+
+
+class ValidationException(Exception):
+    """Basis-Ausnahme für Validierungsfehler."""
+
+
+class ArtifactMissingError(ValidationException):
+    """Wenn eine erwartete Datei fehlt."""
+
+
+class ParseError(ValidationException):
+    """Wenn JSON nicht korrekt geparst werden kann."""
+
+
+class ContractViolationError(ValidationException):
+    """Wenn das JSON nicht dem Schema entspricht."""
+
+
+def _load_json(source: Union[str, Path, Dict[str, Any]]) -> Dict[str, Any]:
+    """Hilfsfunktion, um JSON-Daten aus Pfad oder Dict zu laden."""
+    if isinstance(source, dict):
+        return source
+    if not isinstance(source, (str, Path)):
+        raise ParseError(f"Ungültiger JSON-Quelletyp: {type(source)}")
+
+    path = Path(source)
+    if not path.exists():
+        raise ArtifactMissingError(f"Datei nicht gefunden: {path}")
+    try:
+        with path.open('r', encoding='utf-8') as f:
+            return json.load(f)
+    except json.JSONDecodeError as e:
+        raise ParseError(f"Fehler beim Lesen des JSON: {e}") from e
+
+
+def validate_json(input_json: Union[Dict[str, Any], str], schema: Dict[str, Any]) -> Dict[str, Any]:
+    """Validiert JSON gegen ein Schema.
+
+    Args:
+        input_json: JSON-Daten oder Pfad zur JSON-Datei.
+        schema: Das JSON-Schema.
+
+    Returns:
+        Dict mit Schlüsseln: valid (bool), errors (list[str]), optional unknown_reason (str)
+    """
+    result: Dict[str, Any] = {"valid": False, "errors": []}
+
+    try:
+        data = _load_json(input_json)
+    except ArtifactMissingError as e:
+        result["errors"].append(str(e))
+        result["unknown_reason"] = "artefact_missing"
+        return result
+    except ParseError as e:
+        result["errors"].append(str(e))
+        result["unknown_reason"] = "parse_error"
+        return result
+
+    # Validationsprüfung
+    try:
+        validate(instance=data, schema=schema)
+    except ValidationError as e:
+        result["errors"].append(str(e))
+        result["unknown_reason"] = "contract_violation"
+        return result
+
+    # Erfolgreich validiert
+    result["valid"] = True
+    return result