1.1 changes

cfg/amar/link/main.py

@@ -0,0 +1,105 @@
+"""
+Link Room - Adapter layer between managed apps and soleprint.
+
+Exposes standardized JSON endpoints for data navigation.
+Framework-agnostic via pluggable adapters.
+"""
+
+import os
+from typing import Optional
+from fastapi import FastAPI, HTTPException
+
+app = FastAPI(title="Link Room", version="0.1.0")
+
+# Lazy-loaded adapter instance
+_adapter = None
+
+
+def get_adapter():
+    """Get or create adapter instance."""
+    global _adapter
+    if _adapter is None:
+        adapter_type = os.getenv("ADAPTER_TYPE", "django")
+
+        # Database config from environment
+        db_config = {
+            "host": os.getenv("DB_HOST", "localhost"),
+            "port": int(os.getenv("DB_PORT", "5432")),
+            "name": os.getenv("DB_NAME", "amarback"),
+            "user": os.getenv("DB_USER", "postgres"),
+            "password": os.getenv("DB_PASSWORD", ""),
+        }
+
+        if adapter_type == "django":
+            from adapters.django import DjangoAdapter
+            _adapter = DjangoAdapter(db_config)
+        else:
+            raise ValueError(f"Unknown adapter type: {adapter_type}")
+
+    return _adapter
+
+
+@app.get("/health")
+def health():
+    """Health check."""
+    adapter_type = os.getenv("ADAPTER_TYPE", "django")
+
+    # Test adapter connection
+    adapter_ok = False
+    try:
+        adapter = get_adapter()
+        adapter_ok = True
+    except Exception as e:
+        print(f"Adapter error: {e}")
+
+    return {
+        "status": "ok" if adapter_ok else "degraded",
+        "service": "link-room",
+        "adapter": adapter_type,
+        "adapter_loaded": adapter_ok,
+    }
+
+
+@app.get("/api/queries")
+def list_queries():
+    """List available predefined queries."""
+    adapter = get_adapter()
+    return {
+        "queries": adapter.get_queries()
+    }
+
+
+@app.get("/api/navigate")
+def navigate(query: Optional[str] = None, entity: Optional[str] = None, id: Optional[int] = None):
+    """
+    Navigate data graph.
+
+    Query mode: ?query=user_with_pets
+    Navigation mode: ?entity=User&id=123
+
+    Returns:
+        {
+            "nodes": [...],
+            "edges": [...],
+            "summary": {...}
+        }
+    """
+    try:
+        adapter = get_adapter()
+        result = adapter.navigate(query=query, entity=entity, id=id)
+        return result
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        print(f"Navigate error: {e}")
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+if __name__ == "__main__":
+    import uvicorn
+    uvicorn.run(
+        "main:app",
+        host="0.0.0.0",
+        port=int(os.getenv("PORT", "8000")),
+        reload=True,
+    )