feat: mocked initial version for server

Author: nmashchenko

requirements.txt

@@ -7,6 +7,7 @@ shapely
 klampt==0.9.2
 pyyaml
 dacite
+fastapi[standard]
 
 # Perception
 ultralytics

server/main.py

@@ -0,0 +1,90 @@
+from typing import List
+from fastapi import FastAPI, HTTPException
+from fastapi.responses import JSONResponse, StreamingResponse
+from pydantic import BaseModel, Field
+import time
+import uuid
+# import jwt
+
+SECRET_KEY = "CHANGE_ME_TO_SOMETHING_SECURE"
+
+app = FastAPI(title="GemStack Car‑Summon API (Mock)")
+
+### MODELS ###
+
+class LoginRequest(BaseModel):
+    username: str
+    password: str
+
+class CoordinatesRequest(BaseModel):
+    lat: float = Field(..., ge=-90, le=90)
+    lon: float = Field(..., ge=-180, le=180)
+
+class CoordinatesResponse(BaseModel):
+    current_position: CoordinatesRequest
+    optimized_route: List[CoordinatesRequest]
+    eta: str
+
+class SummonResponse(BaseModel):
+    launch_status: str
+    launch_id: str
+
+class CancelRequest(BaseModel):
+    launch_id: str
+
+class CancelResponse(BaseModel):
+    launch_id: str
+    status: str
+
+class StreamPosition(BaseModel):
+    current_position: CoordinatesRequest
+    launch_status: str
+    eta: str
+
+### HELPERS ###
+
+# def create_jwt(username: str) -> str:
+#     payload = {"sub": username, "jti": str(uuid.uuid4())}
+#     return jwt.encode(payload, SECRET_KEY, algorithm="HS256")
+
+### ENDPOINTS ###
+
+# @app.post("/api/login")
+# def login(req: LoginRequest):
+#     if req.username == "admin" and req.password == "password":
+#         return {"token": create_jwt(req.username)}
+#     raise HTTPException(status_code=401, detail="Invalid credentials")
+
+@app.post("/api/coordinates", response_model=CoordinatesResponse)
+def get_coordinates(req: CoordinatesRequest):
+    # Mock “optimized route” as a straight line of 3 waypoints
+    route = [
+        CoordinatesRequest(lat=req.lat + 0.001 * i, lon=req.lon + 0.001 * i)
+        for i in range(1, 4)
+    ]
+    return CoordinatesResponse(
+        current_position=CoordinatesRequest(lat=req.lat, lon=req.lon),
+        optimized_route=route,
+        eta="5 min",
+    )
+
+@app.post("/api/summon", response_model=SummonResponse)
+def summon(req: CoordinatesRequest):
+    launch_id = str(uuid.uuid4())
+    return SummonResponse(launch_status="launched", launch_id=launch_id)
+
+@app.get("/api/stream_position/{launch_id}")
+def stream_position(launch_id: str):
+    def event_generator():
+        lat, lon = 40.0930, -88.2350
+        for i in range(5):
+            time.sleep(1)
+            lat += 0.0005
+            lon += 0.0005
+            yield f"data: {StreamPosition(current_position=CoordinatesRequest(lat=lat, lon=lon), launch_status='navigating', eta=f'{5-i} min').json()}\n\n"
+        yield "data: {\"launch_status\":\"arrived\"}\n\n"
+    return StreamingResponse(event_generator(), media_type="text/event-stream")
+
+@app.post("/api/cancel", response_model=CancelResponse)
+def cancel(req: CancelRequest):
+    return CancelResponse(launch_id=req.launch_id, status="cancelled")