init

app/services/rules.py

@@ -0,0 +1,80 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+import yaml
+
+from app.config import get_settings
+from app.models import AppConfig, ClientConfig, RuleConfig
+
+
+def resolve_policy(policy: str, client: ClientConfig) -> str:
+    return (
+        policy.replace("{{ main_policy }}", client.main_policy)
+        .replace("{{main_policy}}", client.main_policy)
+        .replace("{{ direct_policy }}", client.direct_policy)
+        .replace("{{direct_policy}}", client.direct_policy)
+    )
+
+
+def load_rule_text(path: Path) -> str:
+    return path.read_text(encoding="utf-8")
+
+
+def load_rule_payload(path: Path) -> list[str]:
+    if path.suffix.lower() in {".yaml", ".yml"}:
+        data = yaml.safe_load(path.read_text(encoding="utf-8")) or {}
+        payload = data.get("payload", [])
+        if not isinstance(payload, list):
+            raise ValueError(f"Rule file {path.name} must contain a list field named 'payload'")
+        return [str(item).strip() for item in payload if str(item).strip()]
+
+    lines: list[str] = []
+    for line in path.read_text(encoding="utf-8").splitlines():
+        stripped = line.strip()
+        if not stripped or stripped.startswith("#"):
+            continue
+        lines.append(stripped)
+    return lines
+
+
+def build_rule_provider_entries(app_config: AppConfig, client: ClientConfig, base_url: str, public_path: str):
+    providers: dict[str, dict] = {}
+    for name, rule in app_config.rules.items():
+        entry = {
+            "behavior": rule.behavior,
+            "format": rule.format,
+            "url": f"{base_url}/{public_path}/rules/{name}.yaml",
+            "interval": rule.interval,
+        }
+        providers[name] = entry
+    return providers
+
+
+def build_rule_set_references(app_config: AppConfig, client: ClientConfig) -> list[str]:
+    refs: list[str] = []
+    for name, rule in app_config.rules.items():
+        target = resolve_policy(rule.policy, client)
+        line = f"RULE-SET,{name},{target}"
+        if rule.no_resolve:
+            line += ",no-resolve"
+        refs.append(line)
+    refs.append(f"MATCH,{client.main_policy}")
+    return refs
+
+
+def build_inline_rules(app_config: AppConfig, client: ClientConfig) -> list[str]:
+    settings = get_settings()
+    lines: list[str] = []
+    for rule in app_config.rules.values():
+        path = (settings.rules_dir / rule.file).resolve()
+        if not path.is_file() or settings.rules_dir.resolve() not in path.parents:
+            raise FileNotFoundError(f"Rule file missing: {rule.file}")
+        target = resolve_policy(rule.policy, client)
+        for payload_line in load_rule_payload(path):
+            line = f"{payload_line},{target}"
+            if rule.no_resolve:
+                line += ",no-resolve"
+            lines.append(line)
+    lines.append(f"MATCH,{client.main_policy}")
+    return lines