typing: annotate lookaside.py

[loctrkd.git] / gps303 / lookaside.py

diff --git a/gps303/lookaside.py b/gps303/lookaside.py
index 136ade9aeccf51e836062e8bfb0e83130c9544a4..fb976a00acfd1a968aded27af08d72f4883faf17 100644 (file)
--- a/gps303/lookaside.py
+++ b/gps303/lookaside.py
@@ -1,6 +1,8 @@
 """ Estimate coordinates from WIFI_POSITIONING and send back """
 
+from configparser import ConfigParser
 from datetime import datetime, timezone
+from importlib import import_module
 from logging import getLogger
 from os import umask
 from struct import pack
@@ -8,18 +10,20 @@ import zmq
 
 from . import common
 from .gps303proto import parse_message, WIFI_POSITIONING
-from .opencellid import qry_cell
 from .zmsg import Bcast, Resp, topic
 
 log = getLogger("gps303/lookaside")
 
 
-def runserver(conf):
-    zctx = zmq.Context()
-    zsub = zctx.socket(zmq.SUB)
+def runserver(conf: ConfigParser) -> None:
+    qry = import_module("." + conf.get("lookaside", "backend"), __package__)
+    qry.init(conf)
+    # Is this https://github.com/zeromq/pyzmq/issues/1627 still not fixed?!
+    zctx = zmq.Context()  # type: ignore
+    zsub = zctx.socket(zmq.SUB)  # type: ignore
     zsub.connect(conf.get("collector", "publishurl"))
     zsub.setsockopt(zmq.SUBSCRIBE, topic(WIFI_POSITIONING.PROTO))
-    zpush = zctx.socket(zmq.PUSH)
+    zpush = zctx.socket(zmq.PUSH)  # type: ignore
     zpush.connect(conf.get("collector", "listenurl"))
 
     try:
@@ -33,16 +37,17 @@ def runserver(conf):
                 datetime.fromtimestamp(zmsg.when).astimezone(tz=timezone.utc),
                 msg,
             )
-            lat, lon = qry_cell(
-                conf["opencellid"]["dbfn"], msg.mcc, msg.gsm_cells
-            )
-            resp = Resp(
-                imei=zmsg.imei,
-                when=zmsg.when,  # not the current time, but the original!
-                packet=msg.Out(latitude=lat, longitude=lon).packed,
-            )
-            log.debug("Response for lat=%s, lon=%s: %s", lat, lon, resp)
-            zpush.send(resp.packed)
+            try:
+                lat, lon = qry.lookup(msg.mcc, msg.mnc, msg.gsm_cells, msg.wifi_aps)
+                resp = Resp(
+                    imei=zmsg.imei,
+                    when=zmsg.when,  # not the current time, but the original!
+                    packet=msg.Out(latitude=lat, longitude=lon).packed,
+                )
+                log.debug("Response for lat=%s, lon=%s: %s", lat, lon, resp)
+                zpush.send(resp.packed)
+            except Exception as e:
+                log.warning("Lookup for %s resulted in %s", msg, e)
 
     except KeyboardInterrupt:
         pass