add settings in UI

src/fgai/config.py

@@ -0,0 +1,54 @@
+from __future__ import annotations
+
+import json
+import os
+from pathlib import Path
+
+
+DEFAULT_CONFIG: dict[str, object] = {
+    "log_source": "local_syslog",
+    "graylog_mcp_url": "",
+    "graylog_stream": "",
+    "llm_enabled": False,
+    "llm_model": "",
+    "threat_intel_enabled": False,
+}
+
+EDITABLE_FIELDS = set(DEFAULT_CONFIG) | {"graylog_mcp_token"}
+
+
+class ConfigStore:
+    def __init__(self, path: str) -> None:
+        self.path = Path(path)
+
+    def read(self) -> dict[str, object]:
+        try:
+            stored = json.loads(self.path.read_text(encoding="utf-8"))
+        except (FileNotFoundError, json.JSONDecodeError, OSError):
+            stored = {}
+        return {**DEFAULT_CONFIG, **{key: value for key, value in stored.items() if key in EDITABLE_FIELDS}}
+
+    def public(self) -> dict[str, object]:
+        config = self.read()
+        config["graylog_mcp_token_configured"] = bool(config.pop("graylog_mcp_token", ""))
+        return config
+
+    def update(self, values: dict[str, object]) -> dict[str, object]:
+        current = self.read()
+        for key, value in values.items():
+            if key not in EDITABLE_FIELDS:
+                continue
+            if key == "graylog_mcp_token" and value == "":
+                continue
+            if key in {"llm_enabled", "threat_intel_enabled"}:
+                current[key] = bool(value)
+            elif key == "log_source" and value in {"local_syslog", "graylog_mcp"}:
+                current[key] = value
+            elif isinstance(value, str):
+                current[key] = value.strip()
+        self.path.parent.mkdir(parents=True, exist_ok=True)
+        temporary = self.path.with_suffix(".tmp")
+        temporary.write_text(json.dumps(current, indent=2, sort_keys=True), encoding="utf-8")
+        os.chmod(temporary, 0o600)
+        temporary.replace(self.path)
+        return self.public()