Add in-app local API key setup

Let fresh Docker and local installs enter OpenSky, AIS, and other provider keys directly in onboarding or Settings without manually creating .env files. Persist keys server-side in the backend data store, keep them write-only from the browser, reload runtime settings, and retain local-operator access controls.

backend/services/api_settings.py

@@ -4,12 +4,21 @@ Keys are stored in the backend .env file and loaded via python-dotenv.
 """
 
 import os
+import re
+import tempfile
 from pathlib import Path
 
 # Path to the backend .env file
 ENV_PATH = Path(__file__).parent.parent / ".env"
 # Path to the example template that ships with the repo
 ENV_EXAMPLE_PATH = Path(__file__).parent.parent.parent / ".env.example"
+DATA_DIR = Path(os.environ.get("SB_DATA_DIR", str(Path(__file__).parent.parent / "data")))
+if not DATA_DIR.is_absolute():
+    DATA_DIR = Path(__file__).parent.parent / DATA_DIR
+OPERATOR_KEYS_ENV_PATH = Path(
+    os.environ.get("SHADOWBROKER_OPERATOR_KEYS_ENV", str(DATA_DIR / "operator_api_keys.env"))
+)
+_ENV_KEY_RE = re.compile(r"^[A-Z][A-Z0-9_]*$")
 
 # ---------------------------------------------------------------------------
 # API Registry — every external service the dashboard depends on
@@ -143,6 +152,85 @@ API_REGISTRY = [
     },
 ]
 
+ALLOWED_ENV_KEYS = {
+    str(api["env_key"])
+    for api in API_REGISTRY
+    if api.get("env_key")
+}
+
+
+def _parse_env_file(path: Path) -> dict[str, str]:
+    values: dict[str, str] = {}
+    if not path.exists():
+        return values
+    try:
+        text = path.read_text(encoding="utf-8")
+    except OSError:
+        return values
+    for raw_line in text.splitlines():
+        line = raw_line.strip()
+        if not line or line.startswith("#") or "=" not in line:
+            continue
+        key, value = line.split("=", 1)
+        key = key.strip()
+        if not _ENV_KEY_RE.match(key):
+            continue
+        value = value.strip()
+        if len(value) >= 2 and value[0] == value[-1] and value[0] in {"'", '"'}:
+            value = value[1:-1]
+        values[key] = value
+    return values
+
+
+def _quote_env_value(value: str) -> str:
+    escaped = value.replace("\\", "\\\\").replace('"', '\\"')
+    return f'"{escaped}"'
+
+
+def _write_env_values(path: Path, updates: dict[str, str]) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    lines = path.read_text(encoding="utf-8").splitlines() if path.exists() else []
+    seen: set[str] = set()
+    next_lines: list[str] = []
+    for raw_line in lines:
+        stripped = raw_line.strip()
+        if "=" not in stripped or stripped.startswith("#"):
+            next_lines.append(raw_line)
+            continue
+        key = stripped.split("=", 1)[0].strip()
+        if key in updates:
+            next_lines.append(f"{key}={_quote_env_value(updates[key])}")
+            seen.add(key)
+        else:
+            next_lines.append(raw_line)
+    for key, value in updates.items():
+        if key not in seen:
+            next_lines.append(f"{key}={_quote_env_value(value)}")
+
+    fd, tmp_name = tempfile.mkstemp(dir=str(path.parent), prefix=f"{path.name}.tmp.", text=True)
+    tmp_path = Path(tmp_name)
+    try:
+        with os.fdopen(fd, "w", encoding="utf-8", newline="\n") as handle:
+            handle.write("\n".join(next_lines).rstrip() + "\n")
+        if os.name != "nt":
+            os.chmod(tmp_path, 0o600)
+        os.replace(tmp_path, path)
+        if os.name != "nt":
+            os.chmod(path, 0o600)
+    finally:
+        try:
+            if tmp_path.exists():
+                tmp_path.unlink()
+        except OSError:
+            pass
+
+
+def load_persisted_api_keys_into_environ() -> None:
+    """Load persisted operator API keys if no process env value exists."""
+    for key, value in _parse_env_file(OPERATOR_KEYS_ENV_PATH).items():
+        if key in ALLOWED_ENV_KEYS and value and not os.environ.get(key):
+            os.environ[key] = value
+
 
 def get_env_path_info() -> dict:
     """Return absolute paths for the backend .env and .env.example template.
@@ -160,6 +248,10 @@ def get_env_path_info() -> dict:
             and (not env_path.exists() or os.access(env_path, os.W_OK)),
         "env_example_path": str(example_path),
         "env_example_path_exists": example_path.exists(),
+        "operator_keys_env_path": str(OPERATOR_KEYS_ENV_PATH.resolve()),
+        "operator_keys_env_path_exists": OPERATOR_KEYS_ENV_PATH.exists(),
+        "operator_keys_env_path_writable": os.access(OPERATOR_KEYS_ENV_PATH.parent, os.W_OK)
+            and (not OPERATOR_KEYS_ENV_PATH.exists() or os.access(OPERATOR_KEYS_ENV_PATH, os.W_OK)),
     }
 
 
@@ -171,6 +263,7 @@ def get_api_keys():
     `is_set` to render a CONFIGURED / NOT CONFIGURED badge and the path
     info from `get_env_path_info()` to tell them where to put each key.
     """
+    load_persisted_api_keys_into_environ()
     result = []
     for api in API_REGISTRY:
         entry = {
@@ -189,3 +282,57 @@ def get_api_keys():
             entry["is_set"] = bool(raw)
         result.append(entry)
     return result
+
+
+def save_api_keys(updates: dict[str, str]) -> dict:
+    """Persist allowed API keys from a local operator request.
+
+    Values are accepted write-only: the response includes only configured flags.
+    """
+    clean: dict[str, str] = {}
+    for key, value in updates.items():
+        env_key = str(key or "").strip().upper()
+        if env_key not in ALLOWED_ENV_KEYS:
+            continue
+        clean_value = str(value or "").strip()
+        if clean_value:
+            clean[env_key] = clean_value
+    if not clean:
+        return {"ok": False, "detail": "No supported API keys were provided."}
+
+    _write_env_values(OPERATOR_KEYS_ENV_PATH, clean)
+    try:
+        _write_env_values(ENV_PATH, clean)
+    except OSError:
+        # The persistent operator key file is the source of truth for Docker.
+        pass
+    for key, value in clean.items():
+        os.environ[key] = value
+    if "AIS_API_KEY" in clean:
+        try:
+            from services import ais_stream
+            ais_stream.API_KEY = clean["AIS_API_KEY"]
+        except Exception:
+            pass
+    if "OPENSKY_CLIENT_ID" in clean or "OPENSKY_CLIENT_SECRET" in clean:
+        try:
+            from services.fetchers import flights
+            flights.opensky_client.client_id = os.environ.get("OPENSKY_CLIENT_ID", "")
+            flights.opensky_client.client_secret = os.environ.get("OPENSKY_CLIENT_SECRET", "")
+            flights.opensky_client.token = None
+            flights.opensky_client.expires_at = 0
+        except Exception:
+            pass
+
+    try:
+        from services.config import get_settings
+        get_settings.cache_clear()
+    except Exception:
+        pass
+
+    return {
+        "ok": True,
+        "updated": sorted(clean.keys()),
+        "keys": get_api_keys(),
+        "env": get_env_path_info(),
+    }