Add detectors module

i18n_guardian/detectors/i18next.py

@@ -0,0 +1,75 @@
+"""i18next detector."""
+
+import json
+from pathlib import Path
+from typing import Optional
+
+from i18n_guardian.detectors.base import Detector
+
+
+class I18NextDetector(Detector):
+    """Detect i18next library usage."""
+
+    @property
+    def name(self) -> str:
+        return "i18next"
+
+    @property
+    def patterns(self) -> list:
+        return ["package.json", "i18next.config.js", "i18n.config.js"]
+
+    def detect(self, path: Path) -> Optional[str]:
+        """Check for i18next usage."""
+        package_json = path / "package.json"
+        if package_json.exists():
+            try:
+                with open(package_json, "r", encoding="utf-8") as f:
+                    data = json.load(f)
+                    dependencies = data.get("dependencies", {})
+                    dev_dependencies = data.get("devDependencies", {})
+                    all_deps = {**dependencies, **dev_dependencies}
+                    if "i18next" in all_deps:
+                        return self.name
+            except (json.JSONDecodeError, OSError):
+                pass
+
+        i18next_config = path / "i18next.config.js"
+        if i18next_config.exists():
+            return self.name
+
+        i18n_config = path / "i18n.config.js"
+        if i18n_config.exists():
+            content = i18n_config.read_text(encoding="utf-8")
+            if "i18next" in content:
+                return self.name
+
+        locales_dir = path / "locales"
+        if locales_dir.exists():
+            for lang_file in locales_dir.glob("*.json"):
+                content = lang_file.read_text(encoding="utf-8")
+                try:
+                    data = json.loads(content)
+                    if isinstance(data, dict) and len(data) > 0:
+                        return self.name
+                except json.JSONDecodeError:
+                    continue
+
+        for js_file in path.rglob("*.js"):
+            try:
+                content = js_file.read_text(encoding="utf-8")
+                if "i18n.t(" in content or "i18next.t(" in content:
+                    return self.name
+            except OSError:
+                continue
+
+        return None
+
+    def get_i18n_functions(self) -> list:
+        """Get i18next function names."""
+        return [
+            "t",
+            "i18n.t",
+            "i18next.t",
+            "useTranslation",
+            "withTranslation",
+        ]