Update API to have a sensible grouping of sig_refs rather than separate arrays of sig_refs, sig_refs_names and sig_refs_urls

spotproviders/wwbota.py

@@ -2,6 +2,7 @@ import json
 from datetime import datetime
 
 from core.sig_utils import get_icon_for_sig
+from data.sig_ref import SIGRef
 from data.spot import Spot
 from spotproviders.sse_spot_provider import SSESpotProvider
 
@@ -18,17 +19,12 @@ class WWBOTA(SSESpotProvider):
         # Convert to our spot format. First we unpack references, because WWBOTA spots can have more than one for
         # n-fer activations.
         refs = []
-        ref_names = []
-        ref_urls = []
         for ref in source_spot["references"]:
-            refs.append(ref["reference"])
-            ref_names.append(ref["name"])
-            # Bunkerbase URLs only work for UK bunkers, so only add a URL if we have a B/G prefix. In theory this could
-            # lead to array alignment mismatches if there was e.g. a B/F bunker followed by a B/G one, we'd end up with
-            # the B/G URL in index 0. But in practice there are no overlaps between B/G bunkers and any others, so an
-            # activation will either be entirely B/G or not B/G at all.
+            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"):
-                ref_urls.append("https://bunkerwiki.org/?s=" + ref["reference"])
+                sigref.url="https://bunkerwiki.org/?s=" + ref["reference"]
+            refs.append(sigref)
 
         spot = Spot(source=self.name,
                     dx_call=source_spot["call"].upper(),
@@ -38,7 +34,6 @@ class WWBOTA(SSESpotProvider):
                     comment=source_spot["comment"],
                     sig="WWBOTA",
                     sig_refs=refs,
-                    sig_refs_names=ref_names,
                     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