Added v2 API routes and hard-coded static files to support Connect

Connect looks for /routes and /api/v2/streams/snapshot
These are now present and working.

I've also hard coded the static files directory - fixing this
properly is a work in progress.

src/openflexure_microscope_server/serve_static_files.py

@@ -15,7 +15,8 @@ def add_static_file(app: FastAPI, fname: str, folder: str):
 def add_static_files(app: FastAPI):
     #with importlib.resources.as_file(openflexure_microscope_server) as p:
     #   static_path = p.join("/static/")
-    static_path = "./src/openflexure_microscope_server/static"
+    #TODO: don't hard code this!
+    static_path = "/var/openflexure/application/openflexure-microscope-server/src/openflexure_microscope_server/static"
     if not os.path.isdir(static_path):
         raise RuntimeError("Can't find static files :(")
 

src/openflexure_microscope_server/server.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 import logging
 import importlib.resources
 import os.path
+from fastapi import Response
 from fastapi.staticfiles import StaticFiles
 from fastapi.responses import FileResponse, RedirectResponse
 from labthings_fastapi.thing_server import ThingServer
@@ -30,4 +31,25 @@ except RuntimeError:
     print("Failed to add static files - you will have to do without them!")
 
 
-app = thing_server.app
+app = thing_server.app
+
+# TODO: update openflexure connect to make this unnecessary!!
+# The endpoints below fool OpenFlexure Connect into thinking we are a
+# v2 microscope, so we show up correctly.
+# This is necessary until Connect is rebuilt.
+@app.get("/routes")
+def routes_stub() -> dict[str, dict]:
+    fake_routes = [
+        "/api/v2/",
+        "/api/v2/streams/snapshot",
+    ]
+    return {url: {"url": url, "methods": ["GET"]} for url in fake_routes}
+
+class JPEGResponse(Response):
+    media_type = "image/jpeg"
+
+@app.get("/api/v2/streams/snapshot")
+@app.head("/api/v2/streams/snapshot")
+async def thumbnail() -> JPEGResponse:
+    blob = await thing_server.things["/camera/"].lores_mjpeg_stream.grab_frame()
+    return JPEGResponse(blob)