Add lean mode (overpass source and no map view in frontend)

api/config.dev.py

@@ -4,6 +4,7 @@ DEBUG = True
 VERBOSE = False
 AUTO_RESTART = True
 SECRET = "!!!!!!!!!!!!CHANGE ME!!!!!!!!!!!!"
+LEAN_MODE = True
 POSTGRES_URL = "postgresql+asyncpg://obs:obs@postgres/obs"
 POSTGRES_POOL_SIZE = 20
 POSTGRES_MAX_OVERFLOW = 2 * POSTGRES_POOL_SIZE

api/config.py.example

@@ -7,6 +7,11 @@ DEBUG = False
 VERBOSE = DEBUG
 AUTO_RESTART = DEBUG
 
+# Turn on lean mode to simplify the setup. Lots of features will be
+# unavailable, but you will not need to manage OpenStreetMap data. Please make
+# sure to configure the OBS_FACE_CACHE_DIR correctly for lean mode.
+LEAN_MODE = False
+
 # Required to encrypt or sign sessions, cookies, tokens, etc.
 SECRET = "!!!<<<CHANGEME>>>!!!"
 

api/obs/api/process.py

@@ -25,7 +25,7 @@ from obs.face.filter import (
     RequiredFieldsFilter,
 )
 
-from obs.face.osm import DataSource, DatabaseTileSource
+from obs.face.osm import DataSource, DatabaseTileSource, OverpassTileSource
 
 from obs.api.db import OvertakingEvent, Track, make_session
 from obs.api.app import app
@@ -33,6 +33,20 @@ from obs.api.app import app
 log = logging.getLogger(__name__)
 
 
+def get_data_source():
+    """
+    Creates a data source based on the configuration of the portal. In *lean*
+    mode, the OverpassTileSource is used to fetch data on demand. In normal
+    mode, the roads database is used.
+    """
+    if app.config.LEAN_MODE:
+        tile_source = OverpassTileSource(cache_dir=app.config.OBS_FACE_CACHE_DIR)
+    else:
+        tile_source = DatabaseTileSource()
+
+    return DataSource(tile_source)
+
+
 async def process_tracks_loop(delay):
     while True:
         try:
@@ -50,9 +64,7 @@ async def process_tracks_loop(delay):
                     await asyncio.sleep(delay)
                     continue
 
-                tile_source = DatabaseTileSource()
-                data_source = DataSource(tile_source)
-
+                data_source = get_data_source()
                 await process_track(session, track, data_source)
         except BaseException:
             log.exception("Failed to process track. Will continue.")
@@ -66,8 +78,7 @@ async def process_tracks(tracks):
 
     :param tracks: A list of strings which
     """
-    tile_source = DatabaseTileSource()
-    data_source = DataSource(tile_source)
+    data_source = get_data_source()
 
     async with make_session() as session:
         for track_id_or_slug in tracks:

api/obs/api/routes/frontend.py

@@ -6,6 +6,7 @@ from sanic.exceptions import NotFound
 from obs.api.app import app
 
 if app.config.FRONTEND_CONFIG:
+
     @app.get("/config.json")
     def get_frontend_config(req):
         result = {
@@ -13,7 +14,10 @@ if app.config.FRONTEND_CONFIG:
             **req.app.config.FRONTEND_CONFIG,
             "apiUrl": f"{req.ctx.api_url}/api",
             "loginUrl": f"{req.ctx.api_url}/login",
-            "obsMapSource": {
+            "obsMapSource": (
+                None
+                if app.config.LEAN_MODE
+                else {
                     "type": "vector",
                     "tiles": [
                         req.ctx.api_url
@@ -24,7 +28,8 @@ if app.config.FRONTEND_CONFIG:
                     ],
                     "minzoom": 12,
                     "maxzoom": 14,
-            },
+                }
+            ),
         }
 
         return response.json(result)

frontend/src/App.tsx

@@ -59,6 +59,8 @@ const App = connect((state) => ({login: state.login}))(function App({login}) {
   const config = useConfig()
   const apiVersion = useObservable(() => from(api.get('/info')).pipe(pluck('version')))
 
+  const hasMap = Boolean(config?.obsMapSource)
+
   React.useEffect(() => {
     api.loadUser()
   }, [])
@@ -72,7 +74,7 @@ const App = connect((state) => ({login: state.login}))(function App({login}) {
             OpenBikeSensor
           </Link>
 
-          {config?.obsMapSource && (
+          {hasMap && (
             <Link component={MenuItemForLink} to="/map" as="a">
               Map
             </Link>
@@ -110,9 +112,9 @@ const App = connect((state) => ({login: state.login}))(function App({login}) {
         <Route path="/" exact>
           <HomePage />
         </Route>
-        <Route path="/map" exact>
+        {hasMap && <Route path="/map" exact>
           <MapPage />
-        </Route>
+        </Route>}
         <Route path="/tracks" exact>
           <TracksPage />
         </Route>