Refactor server into submodule

src/openflexure_microscope_server/server/legacy_api.py

@@ -0,0 +1,35 @@
+from . import ThingServer
+from fastapi import Response
+from socket import gethostname
+
+
+def add_v2_endpoints(thing_server: ThingServer):
+    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]:
+        """A stub list of routes, used by OF Connect to identify the microscope"""
+        fake_routes = [
+            "/api/v2/",
+            "/api/v2/streams/snapshot",
+            "/api/v2/instrument/settings/name"
+        ]
+        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:
+        """A low-resolution snapshot, for compatibility with OF connect"""
+        blob = await thing_server.things["/camera/"].lores_mjpeg_stream.grab_frame()
+        return JPEGResponse(blob)
+
+    @app.get("/api/v2/instrument/settings/name")
+    def get_hostname() -> str:
+        """Get the hostname of the device, for compatibility with OF connect"""
+        return gethostname()