Refactor looking up SIG reference details into a common location, taking it out of the individual spot providers. This means we can now look up references properly from Cluster spot comments, etc. Closes #74 as there is no longer any duplication of these lookups. Works towards #54 as sig_refs now specify their sig internally.

spotproviders/wwbota.py

@@ -20,10 +20,7 @@ class WWBOTA(SSESpotProvider):
         # n-fer activations.
         refs = []
         for ref in source_spot["references"]:
-            sigref = SIGRef(id=ref["reference"], name=ref["name"])
-            # Bunkerbase URLs only work for UK bunkers, so only add a URL if we have a B/G prefix.
-            if ref["reference"].startswith("B/G"):
-                sigref.url="https://bunkerwiki.org/?s=" + ref["reference"]
+            sigref = SIGRef(id=ref["reference"], sig="WWBOTA", name=ref["name"])
             refs.append(sigref)
 
         spot = Spot(source=self.name,
@@ -32,9 +29,7 @@ class WWBOTA(SSESpotProvider):
                     freq=float(source_spot["freq"]) * 1000000,
                     mode=source_spot["mode"].upper(),
                     comment=source_spot["comment"],
-                    sig="WWBOTA",
                     sig_refs=refs,
-                    icon=get_icon_for_sig("WWBOTA"),
                     time=datetime.fromisoformat(source_spot["time"]).timestamp(),
                     # WWBOTA spots can contain multiple references for bunkers being activated simultaneously. For
                     # now, we will just pick the first one to use as our grid, latitude and longitude.